From bcf52fe5fd7b178e3c72f53762c8e32ca7910dc4 Mon Sep 17 00:00:00 2001 From: Nassim Jahnke Date: Sun, 27 Oct 2024 09:24:59 +0100 Subject: [PATCH] Delete some old patches --- .../removed/1.21/0393-Fix-SPIGOT-5989.patch | 63 - .../0562-Fix-dangerous-end-portal-logic.patch | 88 - patches/removed/1.21/0993-Starlight.patch | 5429 ---- .../1.21/0994-Rewrite-chunk-system.patch | 21846 ---------------- ...rove-exact-choice-recipe-ingredients.patch | 0 .../0451-Fix-harming-potion-dupe.patch | 0 ...ies-in-dispense-events-regarding-sta.patch | 0 ...-API-for-updating-recipes-on-clients.patch | 0 ...cing-for-EntityLiving-hasLineOfSight.patch | 0 9 files changed, 27426 deletions(-) delete mode 100644 patches/removed/1.21/0393-Fix-SPIGOT-5989.patch delete mode 100644 patches/removed/1.21/0562-Fix-dangerous-end-portal-logic.patch delete mode 100644 patches/removed/1.21/0993-Starlight.patch delete mode 100644 patches/removed/1.21/0994-Rewrite-chunk-system.patch rename patches/{later => unapplied/server}/0277-Improve-exact-choice-recipe-ingredients.patch (100%) rename patches/{later => unapplied/server}/0451-Fix-harming-potion-dupe.patch (100%) rename patches/{later => unapplied/server}/0777-Fix-inconsistencies-in-dispense-events-regarding-sta.patch (100%) rename patches/{later => unapplied/server}/0845-API-for-updating-recipes-on-clients.patch (100%) rename patches/{later => unapplied/server}/0986-Strip-raytracing-for-EntityLiving-hasLineOfSight.patch (100%) diff --git a/patches/removed/1.21/0393-Fix-SPIGOT-5989.patch b/patches/removed/1.21/0393-Fix-SPIGOT-5989.patch deleted file mode 100644 index 5b41e0742c..0000000000 --- a/patches/removed/1.21/0393-Fix-SPIGOT-5989.patch +++ /dev/null @@ -1,63 +0,0 @@ -From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 -From: JRoy -Date: Wed, 15 Jul 2020 21:42:52 -0400 -Subject: [PATCH] Fix SPIGOT-5989 - -Before this fix, if a player was respawning to a respawn anchor and -the respawn location was modified away from the anchor with the -PlayerRespawnEvent, the anchor would still lose some charge. -This fixes that by checking if the modified spawn location is -still at a respawn anchor. - -diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java -index 935061ed5c22b48e43d27fe0840cc69fb60d5344..97a3f29414cd9f11e6a790cb30f7ef25a836b06c 100644 ---- a/src/main/java/net/minecraft/server/players/PlayerList.java -+++ b/src/main/java/net/minecraft/server/players/PlayerList.java -@@ -804,6 +804,7 @@ public abstract class PlayerList { - // Paper start - Add PlayerPostRespawnEvent - boolean isBedSpawn = false; - boolean isRespawn = false; -+ boolean isLocAltered = false; // Paper - Fix SPIGOT-5989 - // Paper end - Add PlayerPostRespawnEvent - - // CraftBukkit start - fire PlayerRespawnEvent -@@ -814,7 +815,7 @@ public abstract class PlayerList { - Optional optional; - - if (blockposition != null) { -- optional = net.minecraft.world.entity.player.Player.findRespawnPositionAndUseSpawnBlock(worldserver1, blockposition, f, flag1, flag); -+ optional = net.minecraft.world.entity.player.Player.findRespawnPositionAndUseSpawnBlock(worldserver1, blockposition, f, flag1, true); // Paper - Fix SPIGOT-5989 - } else { - optional = Optional.empty(); - } -@@ -858,7 +859,12 @@ public abstract class PlayerList { - } - // Spigot End - -- location = respawnEvent.getRespawnLocation(); -+ // Paper start - Fix SPIGOT-5989 -+ if (!location.equals(respawnEvent.getRespawnLocation()) ) { -+ location = respawnEvent.getRespawnLocation(); -+ isLocAltered = true; -+ } -+ // Paper end - Fix SPIGOT-5989 - if (!flag) entityplayer.reset(); // SPIGOT-4785 - isRespawn = true; // Paper - Add PlayerPostRespawnEvent - } else { -@@ -896,8 +902,14 @@ public abstract class PlayerList { - } - // entityplayer1.initInventoryMenu(); - entityplayer1.setHealth(entityplayer1.getHealth()); -- if (flag2) { -- entityplayer1.connection.send(new ClientboundSoundPacket(SoundEvents.RESPAWN_ANCHOR_DEPLETE, SoundSource.BLOCKS, (double) blockposition.getX(), (double) blockposition.getY(), (double) blockposition.getZ(), 1.0F, 1.0F, worldserver1.getRandom().nextLong())); -+ // Paper start - Fix SPIGOT-5989 -+ if (flag2 && !isLocAltered) { -+ if (!flag1) { -+ BlockState data = worldserver1.getBlockState(blockposition); -+ worldserver1.setBlock(blockposition, data.setValue(net.minecraft.world.level.block.RespawnAnchorBlock.CHARGE, data.getValue(net.minecraft.world.level.block.RespawnAnchorBlock.CHARGE) - 1), 3); -+ } -+ entityplayer1.connection.send(new ClientboundSoundPacket(SoundEvents.RESPAWN_ANCHOR_DEPLETE, SoundSource.BLOCKS, (double) location.getX(), (double) location.getY(), (double) location.getZ(), 1.0F, 1.0F, worldserver1.getRandom().nextLong())); -+ // Paper end - Fix SPIGOT-5989 - } - // Added from changeDimension - this.sendAllPlayerInfo(entityplayer); // Update health, etc... diff --git a/patches/removed/1.21/0562-Fix-dangerous-end-portal-logic.patch b/patches/removed/1.21/0562-Fix-dangerous-end-portal-logic.patch deleted file mode 100644 index 88c7e811e1..0000000000 --- a/patches/removed/1.21/0562-Fix-dangerous-end-portal-logic.patch +++ /dev/null @@ -1,88 +0,0 @@ -From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 -From: Spottedleaf -Date: Fri, 4 Jun 2021 17:06:52 -0400 -Subject: [PATCH] Fix dangerous end portal logic - -End portals could teleport entities during move calls. Stupid -logic given the caller will never expect that kind of thing, -and will result in all kinds of dupes. - -Move the tick logic into the post tick, where portaling was -designed to happen in the first place. - -diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java -index 21150f44e4f71aba3801d5392e45243112d012c0..b4670fc653721283f95bb61ac57c306b224b7fb7 100644 ---- a/src/main/java/net/minecraft/world/entity/Entity.java -+++ b/src/main/java/net/minecraft/world/entity/Entity.java -@@ -422,6 +422,36 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess - return this.originWorld; - } - // Paper end - Entity origin API -+ // Paper start - make end portalling safe -+ public BlockPos portalBlock; -+ public ServerLevel portalWorld; -+ public void tickEndPortal() { -+ BlockPos pos = this.portalBlock; -+ ServerLevel world = this.portalWorld; -+ this.portalBlock = null; -+ this.portalWorld = null; -+ -+ if (pos == null || world == null || world != this.level) { -+ return; -+ } -+ -+ if (this.isPassenger() || this.isVehicle() || !this.canChangeDimensions() || this.isRemoved() || !this.valid || !this.isAlive()) { -+ return; -+ } -+ -+ ResourceKey resourcekey = world.getTypeKey() == LevelStem.END ? Level.OVERWORLD : Level.END; // CraftBukkit - SPIGOT-6152: send back to main overworld in custom ends -+ ServerLevel worldserver = world.getServer().getLevel(resourcekey); -+ -+ org.bukkit.event.entity.EntityPortalEnterEvent event = new org.bukkit.event.entity.EntityPortalEnterEvent(this.getBukkitEntity(), new org.bukkit.Location(world.getWorld(), pos.getX(), pos.getY(), pos.getZ())); -+ event.callEvent(); -+ -+ if (this instanceof ServerPlayer) { -+ ((ServerPlayer) this).changeDimension(worldserver, PlayerTeleportEvent.TeleportCause.END_PORTAL); -+ return; -+ } -+ this.teleportTo(worldserver, null); -+ } -+ // Paper end - make end portalling safe - public float getBukkitYaw() { - return this.yRot; - } -@@ -2833,6 +2863,7 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess - } - - this.processPortalCooldown(); -+ if (!io.papermc.paper.configuration.GlobalConfiguration.get().unsupportedSettings.allowUnsafeEndPortalTeleportation) this.tickEndPortal(); // Paper - make end portalling safe - } - } - -diff --git a/src/main/java/net/minecraft/world/level/block/EndPortalBlock.java b/src/main/java/net/minecraft/world/level/block/EndPortalBlock.java -index a2de13a366e4a462b746dab035372838127f4994..7272d70c672b54dcf595beafd7a2ed33c96e35cb 100644 ---- a/src/main/java/net/minecraft/world/level/block/EndPortalBlock.java -+++ b/src/main/java/net/minecraft/world/level/block/EndPortalBlock.java -@@ -61,16 +61,13 @@ public class EndPortalBlock extends BaseEntityBlock { - // return; // CraftBukkit - always fire event in case plugins wish to change it - } - -- // CraftBukkit start - Entity in portal -- EntityPortalEnterEvent event = new EntityPortalEnterEvent(entity.getBukkitEntity(), new org.bukkit.Location(world.getWorld(), pos.getX(), pos.getY(), pos.getZ())); -- world.getCraftServer().getPluginManager().callEvent(event); -- -- if (entity instanceof ServerPlayer) { -- ((ServerPlayer) entity).changeDimension(worldserver, PlayerTeleportEvent.TeleportCause.END_PORTAL); -- return; -+ // Paper start - move all of this logic into portal tick -+ entity.portalWorld = ((ServerLevel)world); -+ entity.portalBlock = pos.immutable(); -+ if (io.papermc.paper.configuration.GlobalConfiguration.get().unsupportedSettings.allowUnsafeEndPortalTeleportation) { -+ entity.tickEndPortal(); - } -- // CraftBukkit end -- entity.changeDimension(worldserver); -+ // Paper end - move all of this logic into portal tick - } - - } diff --git a/patches/removed/1.21/0993-Starlight.patch b/patches/removed/1.21/0993-Starlight.patch deleted file mode 100644 index bc604e348c..0000000000 --- a/patches/removed/1.21/0993-Starlight.patch +++ /dev/null @@ -1,5429 +0,0 @@ -From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 -From: Spottedleaf -Date: Wed, 28 Oct 2020 16:51:55 -0700 -Subject: [PATCH] Starlight - -See https://github.com/PaperMC/Starlight - -== AT == -public net.minecraft.server.level.ChunkHolder broadcast(Lnet/minecraft/network/protocol/Packet;Z)V - -diff --git a/src/main/java/ca/spottedleaf/starlight/common/light/BlockStarLightEngine.java b/src/main/java/ca/spottedleaf/starlight/common/light/BlockStarLightEngine.java -new file mode 100644 -index 0000000000000000000000000000000000000000..3732a940d9603cf502983afbc4663113d1400be8 ---- /dev/null -+++ b/src/main/java/ca/spottedleaf/starlight/common/light/BlockStarLightEngine.java -@@ -0,0 +1,275 @@ -+package ca.spottedleaf.starlight.common.light; -+ -+import net.minecraft.core.BlockPos; -+import net.minecraft.world.level.Level; -+import net.minecraft.world.level.block.state.BlockState; -+import net.minecraft.world.level.chunk.ChunkAccess; -+import net.minecraft.world.level.chunk.status.ChunkStatus; -+import net.minecraft.world.level.chunk.LevelChunkSection; -+import net.minecraft.world.level.chunk.LightChunkGetter; -+import net.minecraft.world.level.chunk.PalettedContainer; -+import net.minecraft.world.phys.shapes.Shapes; -+import net.minecraft.world.phys.shapes.VoxelShape; -+import java.util.ArrayList; -+import java.util.List; -+import java.util.Set; -+ -+public final class BlockStarLightEngine extends StarLightEngine { -+ -+ public BlockStarLightEngine(final Level world) { -+ super(false, world); -+ } -+ -+ @Override -+ protected boolean[] getEmptinessMap(final ChunkAccess chunk) { -+ return chunk.getBlockEmptinessMap(); -+ } -+ -+ @Override -+ protected void setEmptinessMap(final ChunkAccess chunk, final boolean[] to) { -+ chunk.setBlockEmptinessMap(to); -+ } -+ -+ @Override -+ protected SWMRNibbleArray[] getNibblesOnChunk(final ChunkAccess chunk) { -+ return chunk.getBlockNibbles(); -+ } -+ -+ @Override -+ protected void setNibbles(final ChunkAccess chunk, final SWMRNibbleArray[] to) { -+ chunk.setBlockNibbles(to); -+ } -+ -+ @Override -+ protected boolean canUseChunk(final ChunkAccess chunk) { -+ return chunk.getStatus().isOrAfter(ChunkStatus.LIGHT) && (this.isClientSide || chunk.isLightCorrect()); -+ } -+ -+ @Override -+ protected void setNibbleNull(final int chunkX, final int chunkY, final int chunkZ) { -+ final SWMRNibbleArray nibble = this.getNibbleFromCache(chunkX, chunkY, chunkZ); -+ if (nibble != null) { -+ // de-initialisation is not as straightforward as with sky data, since deinit of block light is typically -+ // because a block was removed - which can decrease light. with sky data, block breaking can only result -+ // in increases, and thus the existing sky block check will actually correctly propagate light through -+ // a null section. so in order to propagate decreases correctly, we can do a couple of things: not remove -+ // the data section, or do edge checks on ALL axis (x, y, z). however I do not want edge checks running -+ // for clients at all, as they are expensive. so we don't remove the section, but to maintain the appearence -+ // of vanilla data management we "hide" them. -+ nibble.setHidden(); -+ } -+ } -+ -+ @Override -+ protected void initNibble(final int chunkX, final int chunkY, final int chunkZ, final boolean extrude, final boolean initRemovedNibbles) { -+ if (chunkY < this.minLightSection || chunkY > this.maxLightSection || this.getChunkInCache(chunkX, chunkZ) == null) { -+ return; -+ } -+ -+ final SWMRNibbleArray nibble = this.getNibbleFromCache(chunkX, chunkY, chunkZ); -+ if (nibble == null) { -+ if (!initRemovedNibbles) { -+ throw new IllegalStateException(); -+ } else { -+ this.setNibbleInCache(chunkX, chunkY, chunkZ, new SWMRNibbleArray()); -+ } -+ } else { -+ nibble.setNonNull(); -+ } -+ } -+ -+ @Override -+ protected final void checkBlock(final LightChunkGetter lightAccess, final int worldX, final int worldY, final int worldZ) { -+ // blocks can change opacity -+ // blocks can change emitted light -+ // blocks can change direction of propagation -+ -+ final int encodeOffset = this.coordinateOffset; -+ final int emittedMask = this.emittedLightMask; -+ -+ final int currentLevel = this.getLightLevel(worldX, worldY, worldZ); -+ final BlockState blockState = this.getBlockState(worldX, worldY, worldZ); -+ final int emittedLevel = blockState.getLightEmission() & emittedMask; -+ -+ this.setLightLevel(worldX, worldY, worldZ, emittedLevel); -+ // this accounts for change in emitted light that would cause an increase -+ if (emittedLevel != 0) { -+ this.appendToIncreaseQueue( -+ ((worldX + (worldZ << 6) + (worldY << (6 + 6)) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | (emittedLevel & 0xFL) << (6 + 6 + 16) -+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4)) -+ | (blockState.isConditionallyFullOpaque() ? FLAG_HAS_SIDED_TRANSPARENT_BLOCKS : 0) -+ ); -+ } -+ // this also accounts for a change in emitted light that would cause a decrease -+ // this also accounts for the change of direction of propagation (i.e old block was full transparent, new block is full opaque or vice versa) -+ // as it checks all neighbours (even if current level is 0) -+ this.appendToDecreaseQueue( -+ ((worldX + (worldZ << 6) + (worldY << (6 + 6)) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | (currentLevel & 0xFL) << (6 + 6 + 16) -+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4)) -+ // always keep sided transparent false here, new block might be conditionally transparent which would -+ // prevent us from decreasing sources in the directions where the new block is opaque -+ // if it turns out we were wrong to de-propagate the source, the re-propagate logic WILL always -+ // catch that and fix it. -+ ); -+ // re-propagating neighbours (done by the decrease queue) will also account for opacity changes in this block -+ } -+ -+ protected final BlockPos.MutableBlockPos recalcCenterPos = new BlockPos.MutableBlockPos(); -+ protected final BlockPos.MutableBlockPos recalcNeighbourPos = new BlockPos.MutableBlockPos(); -+ -+ @Override -+ protected int calculateLightValue(final LightChunkGetter lightAccess, final int worldX, final int worldY, final int worldZ, -+ final int expect) { -+ final BlockState centerState = this.getBlockState(worldX, worldY, worldZ); -+ int level = centerState.getLightEmission() & 0xF; -+ -+ if (level >= (15 - 1) || level > expect) { -+ return level; -+ } -+ -+ final int sectionOffset = this.chunkSectionIndexOffset; -+ final BlockState conditionallyOpaqueState; -+ int opacity = centerState.getOpacityIfCached(); -+ -+ if (opacity == -1) { -+ this.recalcCenterPos.set(worldX, worldY, worldZ); -+ opacity = centerState.getLightBlock(lightAccess.getLevel(), this.recalcCenterPos); -+ if (centerState.isConditionallyFullOpaque()) { -+ conditionallyOpaqueState = centerState; -+ } else { -+ conditionallyOpaqueState = null; -+ } -+ } else if (opacity >= 15) { -+ return level; -+ } else { -+ conditionallyOpaqueState = null; -+ } -+ opacity = Math.max(1, opacity); -+ -+ for (final AxisDirection direction : AXIS_DIRECTIONS) { -+ final int offX = worldX + direction.x; -+ final int offY = worldY + direction.y; -+ final int offZ = worldZ + direction.z; -+ -+ final int sectionIndex = (offX >> 4) + 5 * (offZ >> 4) + (5 * 5) * (offY >> 4) + sectionOffset; -+ -+ final int neighbourLevel = this.getLightLevel(sectionIndex, (offX & 15) | ((offZ & 15) << 4) | ((offY & 15) << 8)); -+ -+ if ((neighbourLevel - 1) <= level) { -+ // don't need to test transparency, we know it wont affect the result. -+ continue; -+ } -+ -+ final BlockState neighbourState = this.getBlockState(offX, offY, offZ); -+ if (neighbourState.isConditionallyFullOpaque()) { -+ // here the block can be conditionally opaque (i.e light cannot propagate from it), so we need to test that -+ // we don't read the blockstate because most of the time this is false, so using the faster -+ // known transparency lookup results in a net win -+ this.recalcNeighbourPos.set(offX, offY, offZ); -+ final VoxelShape neighbourFace = neighbourState.getFaceOcclusionShape(lightAccess.getLevel(), this.recalcNeighbourPos, direction.opposite.nms); -+ final VoxelShape thisFace = conditionallyOpaqueState == null ? Shapes.empty() : conditionallyOpaqueState.getFaceOcclusionShape(lightAccess.getLevel(), this.recalcCenterPos, direction.nms); -+ if (Shapes.faceShapeOccludes(thisFace, neighbourFace)) { -+ // not allowed to propagate -+ continue; -+ } -+ } -+ -+ // passed transparency, -+ -+ final int calculated = neighbourLevel - opacity; -+ level = Math.max(calculated, level); -+ if (level > expect) { -+ return level; -+ } -+ } -+ -+ return level; -+ } -+ -+ @Override -+ protected void propagateBlockChanges(final LightChunkGetter lightAccess, final ChunkAccess atChunk, final Set positions) { -+ for (final BlockPos pos : positions) { -+ this.checkBlock(lightAccess, pos.getX(), pos.getY(), pos.getZ()); -+ } -+ -+ this.performLightDecrease(lightAccess); -+ } -+ -+ protected List getSources(final LightChunkGetter lightAccess, final ChunkAccess chunk) { -+ final List sources = new ArrayList<>(); -+ -+ final int offX = chunk.getPos().x << 4; -+ final int offZ = chunk.getPos().z << 4; -+ -+ final LevelChunkSection[] sections = chunk.getSections(); -+ for (int sectionY = this.minSection; sectionY <= this.maxSection; ++sectionY) { -+ final LevelChunkSection section = sections[sectionY - this.minSection]; -+ if (section == null || section.hasOnlyAir()) { -+ // no sources in empty sections -+ continue; -+ } -+ if (!section.maybeHas((final BlockState state) -> { -+ return state.getLightEmission() > 0; -+ })) { -+ // no light sources in palette -+ continue; -+ } -+ final PalettedContainer states = section.states; -+ final int offY = sectionY << 4; -+ -+ for (int index = 0; index < (16 * 16 * 16); ++index) { -+ final BlockState state = states.get(index); -+ if (state.getLightEmission() <= 0) { -+ continue; -+ } -+ -+ // index = x | (z << 4) | (y << 8) -+ sources.add(new BlockPos(offX | (index & 15), offY | (index >>> 8), offZ | ((index >>> 4) & 15))); -+ } -+ } -+ -+ return sources; -+ } -+ -+ @Override -+ public void lightChunk(final LightChunkGetter lightAccess, final ChunkAccess chunk, final boolean needsEdgeChecks) { -+ // setup sources -+ final int emittedMask = this.emittedLightMask; -+ final List positions = this.getSources(lightAccess, chunk); -+ for (int i = 0, len = positions.size(); i < len; ++i) { -+ final BlockPos pos = positions.get(i); -+ final BlockState blockState = this.getBlockState(pos.getX(), pos.getY(), pos.getZ()); -+ final int emittedLight = blockState.getLightEmission() & emittedMask; -+ -+ if (emittedLight <= this.getLightLevel(pos.getX(), pos.getY(), pos.getZ())) { -+ // some other source is brighter -+ continue; -+ } -+ -+ this.appendToIncreaseQueue( -+ ((pos.getX() + (pos.getZ() << 6) + (pos.getY() << (6 + 6)) + this.coordinateOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | (emittedLight & 0xFL) << (6 + 6 + 16) -+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4)) -+ | (blockState.isConditionallyFullOpaque() ? FLAG_HAS_SIDED_TRANSPARENT_BLOCKS : 0) -+ ); -+ -+ -+ // propagation wont set this for us -+ this.setLightLevel(pos.getX(), pos.getY(), pos.getZ(), emittedLight); -+ } -+ -+ if (needsEdgeChecks) { -+ // not required to propagate here, but this will reduce the hit of the edge checks -+ this.performLightIncrease(lightAccess); -+ -+ // verify neighbour edges -+ this.checkChunkEdges(lightAccess, chunk, this.minLightSection, this.maxLightSection); -+ } else { -+ this.propagateNeighbourLevels(lightAccess, chunk, this.minLightSection, this.maxLightSection); -+ -+ this.performLightIncrease(lightAccess); -+ } -+ } -+} -diff --git a/src/main/java/ca/spottedleaf/starlight/common/light/SWMRNibbleArray.java b/src/main/java/ca/spottedleaf/starlight/common/light/SWMRNibbleArray.java -new file mode 100644 -index 0000000000000000000000000000000000000000..4ffb4ffe01c4628d52742c5c0bbd35220eea6294 ---- /dev/null -+++ b/src/main/java/ca/spottedleaf/starlight/common/light/SWMRNibbleArray.java -@@ -0,0 +1,440 @@ -+package ca.spottedleaf.starlight.common.light; -+ -+import net.minecraft.world.level.chunk.DataLayer; -+import java.util.ArrayDeque; -+import java.util.Arrays; -+ -+// SWMR -> Single Writer Multi Reader Nibble Array -+public final class SWMRNibbleArray { -+ -+ /* -+ * Null nibble - nibble does not exist, and should not be written to. Just like vanilla - null -+ * nibbles are always 0 - and they are never written to directly. Only initialised/uninitialised -+ * nibbles can be written to. -+ * -+ * Uninitialised nibble - They are all 0, but the backing array isn't initialised. -+ * -+ * Initialised nibble - Has light data. -+ */ -+ -+ protected static final int INIT_STATE_NULL = 0; // null -+ protected static final int INIT_STATE_UNINIT = 1; // uninitialised -+ protected static final int INIT_STATE_INIT = 2; // initialised -+ protected static final int INIT_STATE_HIDDEN = 3; // initialised, but conversion to Vanilla data should be treated as if NULL -+ -+ public static final int ARRAY_SIZE = 16 * 16 * 16 / (8/4); // blocks / bytes per block -+ // this allows us to maintain only 1 byte array when we're not updating -+ static final ThreadLocal> WORKING_BYTES_POOL = ThreadLocal.withInitial(ArrayDeque::new); -+ -+ private static byte[] allocateBytes() { -+ final byte[] inPool = WORKING_BYTES_POOL.get().pollFirst(); -+ if (inPool != null) { -+ return inPool; -+ } -+ -+ return new byte[ARRAY_SIZE]; -+ } -+ -+ private static void freeBytes(final byte[] bytes) { -+ WORKING_BYTES_POOL.get().addFirst(bytes); -+ } -+ -+ public static SWMRNibbleArray fromVanilla(final DataLayer nibble) { -+ if (nibble == null) { -+ return new SWMRNibbleArray(null, true); -+ } else if (nibble.isEmpty()) { -+ return new SWMRNibbleArray(); -+ } else { -+ return new SWMRNibbleArray(nibble.getData().clone()); // make sure we don't write to the parameter later -+ } -+ } -+ -+ protected int stateUpdating; -+ protected volatile int stateVisible; -+ -+ protected byte[] storageUpdating; -+ protected boolean updatingDirty; // only returns whether storageUpdating is dirty -+ protected volatile byte[] storageVisible; -+ -+ public SWMRNibbleArray() { -+ this(null, false); // lazy init -+ } -+ -+ public SWMRNibbleArray(final byte[] bytes) { -+ this(bytes, false); -+ } -+ -+ public SWMRNibbleArray(final byte[] bytes, final boolean isNullNibble) { -+ if (bytes != null && bytes.length != ARRAY_SIZE) { -+ throw new IllegalArgumentException("Data of wrong length: " + bytes.length); -+ } -+ this.stateVisible = this.stateUpdating = bytes == null ? (isNullNibble ? INIT_STATE_NULL : INIT_STATE_UNINIT) : INIT_STATE_INIT; -+ this.storageUpdating = this.storageVisible = bytes; -+ } -+ -+ public SWMRNibbleArray(final byte[] bytes, final int state) { -+ if (bytes != null && bytes.length != ARRAY_SIZE) { -+ throw new IllegalArgumentException("Data of wrong length: " + bytes.length); -+ } -+ if (bytes == null && (state == INIT_STATE_INIT || state == INIT_STATE_HIDDEN)) { -+ throw new IllegalArgumentException("Data cannot be null and have state be initialised"); -+ } -+ this.stateUpdating = this.stateVisible = state; -+ this.storageUpdating = this.storageVisible = bytes; -+ } -+ -+ @Override -+ public String toString() { -+ StringBuilder stringBuilder = new StringBuilder(); -+ stringBuilder.append("State: "); -+ switch (this.stateVisible) { -+ case INIT_STATE_NULL: -+ stringBuilder.append("null"); -+ break; -+ case INIT_STATE_UNINIT: -+ stringBuilder.append("uninitialised"); -+ break; -+ case INIT_STATE_INIT: -+ stringBuilder.append("initialised"); -+ break; -+ case INIT_STATE_HIDDEN: -+ stringBuilder.append("hidden"); -+ break; -+ default: -+ stringBuilder.append("unknown"); -+ break; -+ } -+ stringBuilder.append("\nData:\n"); -+ -+ final byte[] data = this.storageVisible; -+ if (data != null) { -+ for (int i = 0; i < 4096; ++i) { -+ // Copied from NibbleArray#toString -+ final int level = ((data[i >>> 1] >>> ((i & 1) << 2)) & 0xF); -+ -+ stringBuilder.append(Integer.toHexString(level)); -+ if ((i & 15) == 15) { -+ stringBuilder.append("\n"); -+ } -+ -+ if ((i & 255) == 255) { -+ stringBuilder.append("\n"); -+ } -+ } -+ } else { -+ stringBuilder.append("null"); -+ } -+ -+ return stringBuilder.toString(); -+ } -+ -+ public SaveState getSaveState() { -+ synchronized (this) { -+ final int state = this.stateVisible; -+ final byte[] data = this.storageVisible; -+ if (state == INIT_STATE_NULL) { -+ return null; -+ } -+ if (state == INIT_STATE_UNINIT) { -+ return new SaveState(null, state); -+ } -+ final boolean zero = isAllZero(data); -+ if (zero) { -+ return state == INIT_STATE_INIT ? new SaveState(null, INIT_STATE_UNINIT) : null; -+ } else { -+ return new SaveState(data.clone(), state); -+ } -+ } -+ } -+ -+ protected static boolean isAllZero(final byte[] data) { -+ for (int i = 0; i < (ARRAY_SIZE >>> 4); ++i) { -+ byte whole = data[i << 4]; -+ -+ for (int k = 1; k < (1 << 4); ++k) { -+ whole |= data[(i << 4) | k]; -+ } -+ -+ if (whole != 0) { -+ return false; -+ } -+ } -+ -+ return true; -+ } -+ -+ // operation type: updating on src, updating on other -+ public void extrudeLower(final SWMRNibbleArray other) { -+ if (other.stateUpdating == INIT_STATE_NULL) { -+ throw new IllegalArgumentException(); -+ } -+ -+ if (other.storageUpdating == null) { -+ this.setUninitialised(); -+ return; -+ } -+ -+ final byte[] src = other.storageUpdating; -+ final byte[] into; -+ -+ if (!this.updatingDirty) { -+ if (this.storageUpdating != null) { -+ into = this.storageUpdating = allocateBytes(); -+ } else { -+ this.storageUpdating = into = allocateBytes(); -+ this.stateUpdating = INIT_STATE_INIT; -+ } -+ this.updatingDirty = true; -+ } else { -+ into = this.storageUpdating; -+ } -+ -+ final int start = 0; -+ final int end = (15 | (15 << 4)) >>> 1; -+ -+ /* x | (z << 4) | (y << 8) */ -+ for (int y = 0; y <= 15; ++y) { -+ System.arraycopy(src, start, into, y << (8 - 1), end - start + 1); -+ } -+ } -+ -+ // operation type: updating -+ public void setFull() { -+ if (this.stateUpdating != INIT_STATE_HIDDEN) { -+ this.stateUpdating = INIT_STATE_INIT; -+ } -+ Arrays.fill(this.storageUpdating == null || !this.updatingDirty ? this.storageUpdating = allocateBytes() : this.storageUpdating, (byte)-1); -+ this.updatingDirty = true; -+ } -+ -+ // operation type: updating -+ public void setZero() { -+ if (this.stateUpdating != INIT_STATE_HIDDEN) { -+ this.stateUpdating = INIT_STATE_INIT; -+ } -+ Arrays.fill(this.storageUpdating == null || !this.updatingDirty ? this.storageUpdating = allocateBytes() : this.storageUpdating, (byte)0); -+ this.updatingDirty = true; -+ } -+ -+ // operation type: updating -+ public void setNonNull() { -+ if (this.stateUpdating == INIT_STATE_HIDDEN) { -+ this.stateUpdating = INIT_STATE_INIT; -+ return; -+ } -+ if (this.stateUpdating != INIT_STATE_NULL) { -+ return; -+ } -+ this.stateUpdating = INIT_STATE_UNINIT; -+ } -+ -+ // operation type: updating -+ public void setNull() { -+ this.stateUpdating = INIT_STATE_NULL; -+ if (this.updatingDirty && this.storageUpdating != null) { -+ freeBytes(this.storageUpdating); -+ } -+ this.storageUpdating = null; -+ this.updatingDirty = false; -+ } -+ -+ // operation type: updating -+ public void setUninitialised() { -+ this.stateUpdating = INIT_STATE_UNINIT; -+ if (this.storageUpdating != null && this.updatingDirty) { -+ freeBytes(this.storageUpdating); -+ } -+ this.storageUpdating = null; -+ this.updatingDirty = false; -+ } -+ -+ // operation type: updating -+ public void setHidden() { -+ if (this.stateUpdating == INIT_STATE_HIDDEN) { -+ return; -+ } -+ if (this.stateUpdating != INIT_STATE_INIT) { -+ this.setNull(); -+ } else { -+ this.stateUpdating = INIT_STATE_HIDDEN; -+ } -+ } -+ -+ // operation type: updating -+ public boolean isDirty() { -+ return this.stateUpdating != this.stateVisible || this.updatingDirty; -+ } -+ -+ // operation type: updating -+ public boolean isNullNibbleUpdating() { -+ return this.stateUpdating == INIT_STATE_NULL; -+ } -+ -+ // operation type: visible -+ public boolean isNullNibbleVisible() { -+ return this.stateVisible == INIT_STATE_NULL; -+ } -+ -+ // opeartion type: updating -+ public boolean isUninitialisedUpdating() { -+ return this.stateUpdating == INIT_STATE_UNINIT; -+ } -+ -+ // operation type: visible -+ public boolean isUninitialisedVisible() { -+ return this.stateVisible == INIT_STATE_UNINIT; -+ } -+ -+ // operation type: updating -+ public boolean isInitialisedUpdating() { -+ return this.stateUpdating == INIT_STATE_INIT; -+ } -+ -+ // operation type: visible -+ public boolean isInitialisedVisible() { -+ return this.stateVisible == INIT_STATE_INIT; -+ } -+ -+ // operation type: updating -+ public boolean isHiddenUpdating() { -+ return this.stateUpdating == INIT_STATE_HIDDEN; -+ } -+ -+ // operation type: updating -+ public boolean isHiddenVisible() { -+ return this.stateVisible == INIT_STATE_HIDDEN; -+ } -+ -+ // operation type: updating -+ protected void swapUpdatingAndMarkDirty() { -+ if (this.updatingDirty) { -+ return; -+ } -+ -+ if (this.storageUpdating == null) { -+ this.storageUpdating = allocateBytes(); -+ Arrays.fill(this.storageUpdating, (byte)0); -+ } else { -+ System.arraycopy(this.storageUpdating, 0, this.storageUpdating = allocateBytes(), 0, ARRAY_SIZE); -+ } -+ -+ if (this.stateUpdating != INIT_STATE_HIDDEN) { -+ this.stateUpdating = INIT_STATE_INIT; -+ } -+ this.updatingDirty = true; -+ } -+ -+ // operation type: updating -+ public boolean updateVisible() { -+ if (!this.isDirty()) { -+ return false; -+ } -+ -+ synchronized (this) { -+ if (this.stateUpdating == INIT_STATE_NULL || this.stateUpdating == INIT_STATE_UNINIT) { -+ this.storageVisible = null; -+ } else { -+ if (this.storageVisible == null) { -+ this.storageVisible = this.storageUpdating.clone(); -+ } else { -+ if (this.storageUpdating != this.storageVisible) { -+ System.arraycopy(this.storageUpdating, 0, this.storageVisible, 0, ARRAY_SIZE); -+ } -+ } -+ -+ if (this.storageUpdating != this.storageVisible) { -+ freeBytes(this.storageUpdating); -+ } -+ this.storageUpdating = this.storageVisible; -+ } -+ this.updatingDirty = false; -+ this.stateVisible = this.stateUpdating; -+ } -+ -+ return true; -+ } -+ -+ // operation type: visible -+ public DataLayer toVanillaNibble() { -+ synchronized (this) { -+ switch (this.stateVisible) { -+ case INIT_STATE_HIDDEN: -+ case INIT_STATE_NULL: -+ return null; -+ case INIT_STATE_UNINIT: -+ return new DataLayer(); -+ case INIT_STATE_INIT: -+ return new DataLayer(this.storageVisible.clone()); -+ default: -+ throw new IllegalStateException(); -+ } -+ } -+ } -+ -+ /* x | (z << 4) | (y << 8) */ -+ -+ // operation type: updating -+ public int getUpdating(final int x, final int y, final int z) { -+ return this.getUpdating((x & 15) | ((z & 15) << 4) | ((y & 15) << 8)); -+ } -+ -+ // operation type: updating -+ public int getUpdating(final int index) { -+ // indices range from 0 -> 4096 -+ final byte[] bytes = this.storageUpdating; -+ if (bytes == null) { -+ return 0; -+ } -+ final byte value = bytes[index >>> 1]; -+ -+ // if we are an even index, we want lower 4 bits -+ // if we are an odd index, we want upper 4 bits -+ return ((value >>> ((index & 1) << 2)) & 0xF); -+ } -+ -+ // operation type: visible -+ public int getVisible(final int x, final int y, final int z) { -+ return this.getVisible((x & 15) | ((z & 15) << 4) | ((y & 15) << 8)); -+ } -+ -+ // operation type: visible -+ public int getVisible(final int index) { -+ // indices range from 0 -> 4096 -+ final byte[] visibleBytes = this.storageVisible; -+ if (visibleBytes == null) { -+ return 0; -+ } -+ final byte value = visibleBytes[index >>> 1]; -+ -+ // if we are an even index, we want lower 4 bits -+ // if we are an odd index, we want upper 4 bits -+ return ((value >>> ((index & 1) << 2)) & 0xF); -+ } -+ -+ // operation type: updating -+ public void set(final int x, final int y, final int z, final int value) { -+ this.set((x & 15) | ((z & 15) << 4) | ((y & 15) << 8), value); -+ } -+ -+ // operation type: updating -+ public void set(final int index, final int value) { -+ if (!this.updatingDirty) { -+ this.swapUpdatingAndMarkDirty(); -+ } -+ final int shift = (index & 1) << 2; -+ final int i = index >>> 1; -+ -+ this.storageUpdating[i] = (byte)((this.storageUpdating[i] & (0xF0 >>> shift)) | (value << shift)); -+ } -+ -+ public static final class SaveState { -+ -+ public final byte[] data; -+ public final int state; -+ -+ public SaveState(final byte[] data, final int state) { -+ this.data = data; -+ this.state = state; -+ } -+ } -+} -diff --git a/src/main/java/ca/spottedleaf/starlight/common/light/SkyStarLightEngine.java b/src/main/java/ca/spottedleaf/starlight/common/light/SkyStarLightEngine.java -new file mode 100644 -index 0000000000000000000000000000000000000000..43a2cce467d29f81ba57d77c03608e57857dd579 ---- /dev/null -+++ b/src/main/java/ca/spottedleaf/starlight/common/light/SkyStarLightEngine.java -@@ -0,0 +1,709 @@ -+package ca.spottedleaf.starlight.common.light; -+ -+import ca.spottedleaf.starlight.common.util.WorldUtil; -+import it.unimi.dsi.fastutil.shorts.ShortCollection; -+import it.unimi.dsi.fastutil.shorts.ShortIterator; -+import net.minecraft.core.BlockPos; -+import net.minecraft.world.level.BlockGetter; -+import net.minecraft.world.level.ChunkPos; -+import net.minecraft.world.level.Level; -+import net.minecraft.world.level.block.state.BlockState; -+import net.minecraft.world.level.chunk.ChunkAccess; -+import net.minecraft.world.level.chunk.status.ChunkStatus; -+import net.minecraft.world.level.chunk.LevelChunkSection; -+import net.minecraft.world.level.chunk.LightChunkGetter; -+import net.minecraft.world.phys.shapes.Shapes; -+import net.minecraft.world.phys.shapes.VoxelShape; -+import java.util.Arrays; -+import java.util.Set; -+ -+public final class SkyStarLightEngine extends StarLightEngine { -+ -+ /* -+ Specification for managing the initialisation and de-initialisation of skylight nibble arrays: -+ -+ Skylight nibble initialisation requires that non-empty chunk sections have 1 radius nibbles non-null. -+ -+ This presents some problems, as vanilla is only guaranteed to have 0 radius neighbours loaded when editing blocks. -+ However starlight fixes this so that it has 1 radius loaded. Still, we don't actually have guarantees -+ that we have the necessary chunks loaded to de-initialise neighbour sections (but we do have enough to de-initialise -+ our own) - we need a radius of 2 to de-initialise neighbour nibbles. -+ How do we solve this? -+ -+ Each chunk will store the last known "emptiness" of sections for each of their 1 radius neighbour chunk sections. -+ If the chunk does not have full data, then its nibbles are NOT de-initialised. This is because obviously the -+ chunk did not go through the light stage yet - or its neighbours are not lit. In either case, once the last -+ known "emptiness" of neighbouring sections is filled with data, the chunk will run a full check of the data -+ to see if any of its nibbles need to be de-initialised. -+ -+ The emptiness map allows us to de-initialise neighbour nibbles if the neighbour has it filled with data, -+ and if it doesn't have data then we know it will correctly de-initialise once it fills up. -+ -+ Unlike vanilla, we store whether nibbles are uninitialised on disk - so we don't need any dumb hacking -+ around those. -+ */ -+ -+ protected final int[] heightMapBlockChange = new int[16 * 16]; -+ { -+ Arrays.fill(this.heightMapBlockChange, Integer.MIN_VALUE); // clear heightmap -+ } -+ -+ protected final boolean[] nullPropagationCheckCache; -+ -+ public SkyStarLightEngine(final Level world) { -+ super(true, world); -+ this.nullPropagationCheckCache = new boolean[WorldUtil.getTotalLightSections(world)]; -+ } -+ -+ @Override -+ protected void initNibble(final int chunkX, final int chunkY, final int chunkZ, final boolean extrude, final boolean initRemovedNibbles) { -+ if (chunkY < this.minLightSection || chunkY > this.maxLightSection || this.getChunkInCache(chunkX, chunkZ) == null) { -+ return; -+ } -+ SWMRNibbleArray nibble = this.getNibbleFromCache(chunkX, chunkY, chunkZ); -+ if (nibble == null) { -+ if (!initRemovedNibbles) { -+ throw new IllegalStateException(); -+ } else { -+ this.setNibbleInCache(chunkX, chunkY, chunkZ, nibble = new SWMRNibbleArray(null, true)); -+ } -+ } -+ this.initNibble(nibble, chunkX, chunkY, chunkZ, extrude); -+ } -+ -+ @Override -+ protected void setNibbleNull(final int chunkX, final int chunkY, final int chunkZ) { -+ final SWMRNibbleArray nibble = this.getNibbleFromCache(chunkX, chunkY, chunkZ); -+ if (nibble != null) { -+ nibble.setNull(); -+ } -+ } -+ -+ protected final void initNibble(final SWMRNibbleArray currNibble, final int chunkX, final int chunkY, final int chunkZ, final boolean extrude) { -+ if (!currNibble.isNullNibbleUpdating()) { -+ // already initialised -+ return; -+ } -+ -+ final boolean[] emptinessMap = this.getEmptinessMap(chunkX, chunkZ); -+ -+ // are we above this chunk's lowest empty section? -+ int lowestY = this.minLightSection - 1; -+ for (int currY = this.maxSection; currY >= this.minSection; --currY) { -+ if (emptinessMap == null) { -+ // cannot delay nibble init for lit chunks, as we need to init to propagate into them. -+ final LevelChunkSection current = this.getChunkSection(chunkX, currY, chunkZ); -+ if (current == null || current.hasOnlyAir()) { -+ continue; -+ } -+ } else { -+ if (emptinessMap[currY - this.minSection]) { -+ continue; -+ } -+ } -+ -+ // should always be full lit here -+ lowestY = currY; -+ break; -+ } -+ -+ if (chunkY > lowestY) { -+ // we need to set this one to full -+ final SWMRNibbleArray nibble = this.getNibbleFromCache(chunkX, chunkY, chunkZ); -+ nibble.setNonNull(); -+ nibble.setFull(); -+ return; -+ } -+ -+ if (extrude) { -+ // this nibble is going to depend solely on the skylight data above it -+ // find first non-null data above (there does exist one, as we just found it above) -+ for (int currY = chunkY + 1; currY <= this.maxLightSection; ++currY) { -+ final SWMRNibbleArray nibble = this.getNibbleFromCache(chunkX, currY, chunkZ); -+ if (nibble != null && !nibble.isNullNibbleUpdating()) { -+ currNibble.setNonNull(); -+ currNibble.extrudeLower(nibble); -+ break; -+ } -+ } -+ } else { -+ currNibble.setNonNull(); -+ } -+ } -+ -+ protected final void rewriteNibbleCacheForSkylight(final ChunkAccess chunk) { -+ for (int index = 0, max = this.nibbleCache.length; index < max; ++index) { -+ final SWMRNibbleArray nibble = this.nibbleCache[index]; -+ if (nibble != null && nibble.isNullNibbleUpdating()) { -+ // stop propagation in these areas -+ this.nibbleCache[index] = null; -+ nibble.updateVisible(); -+ } -+ } -+ } -+ -+ // rets whether neighbours were init'd -+ -+ protected final boolean checkNullSection(final int chunkX, final int chunkY, final int chunkZ, -+ final boolean extrudeInitialised) { -+ // null chunk sections may have nibble neighbours in the horizontal 1 radius that are -+ // non-null. Propagation to these neighbours is necessary. -+ // What makes this easy is we know none of these neighbours are non-empty (otherwise -+ // this nibble would be initialised). So, we don't have to initialise -+ // the neighbours in the full 1 radius, because there's no worry that any "paths" -+ // to the neighbours on this horizontal plane are blocked. -+ if (chunkY < this.minLightSection || chunkY > this.maxLightSection || this.nullPropagationCheckCache[chunkY - this.minLightSection]) { -+ return false; -+ } -+ this.nullPropagationCheckCache[chunkY - this.minLightSection] = true; -+ -+ // check horizontal neighbours -+ boolean needInitNeighbours = false; -+ neighbour_search: -+ for (int dz = -1; dz <= 1; ++dz) { -+ for (int dx = -1; dx <= 1; ++dx) { -+ final SWMRNibbleArray nibble = this.getNibbleFromCache(dx + chunkX, chunkY, dz + chunkZ); -+ if (nibble != null && !nibble.isNullNibbleUpdating()) { -+ needInitNeighbours = true; -+ break neighbour_search; -+ } -+ } -+ } -+ -+ if (needInitNeighbours) { -+ for (int dz = -1; dz <= 1; ++dz) { -+ for (int dx = -1; dx <= 1; ++dx) { -+ this.initNibble(dx + chunkX, chunkY, dz + chunkZ, (dx | dz) == 0 ? extrudeInitialised : true, true); -+ } -+ } -+ } -+ -+ return needInitNeighbours; -+ } -+ -+ protected final int getLightLevelExtruded(final int worldX, final int worldY, final int worldZ) { -+ final int chunkX = worldX >> 4; -+ int chunkY = worldY >> 4; -+ final int chunkZ = worldZ >> 4; -+ -+ SWMRNibbleArray nibble = this.getNibbleFromCache(chunkX, chunkY, chunkZ); -+ if (nibble != null) { -+ return nibble.getUpdating(worldX, worldY, worldZ); -+ } -+ -+ for (;;) { -+ if (++chunkY > this.maxLightSection) { -+ return 15; -+ } -+ -+ nibble = this.getNibbleFromCache(chunkX, chunkY, chunkZ); -+ -+ if (nibble != null) { -+ return nibble.getUpdating(worldX, 0, worldZ); -+ } -+ } -+ } -+ -+ @Override -+ protected boolean[] getEmptinessMap(final ChunkAccess chunk) { -+ return chunk.getSkyEmptinessMap(); -+ } -+ -+ @Override -+ protected void setEmptinessMap(final ChunkAccess chunk, final boolean[] to) { -+ chunk.setSkyEmptinessMap(to); -+ } -+ -+ @Override -+ protected SWMRNibbleArray[] getNibblesOnChunk(final ChunkAccess chunk) { -+ return chunk.getSkyNibbles(); -+ } -+ -+ @Override -+ protected void setNibbles(final ChunkAccess chunk, final SWMRNibbleArray[] to) { -+ chunk.setSkyNibbles(to); -+ } -+ -+ @Override -+ protected boolean canUseChunk(final ChunkAccess chunk) { -+ // can only use chunks for sky stuff if their sections have been init'd -+ return chunk.getStatus().isOrAfter(ChunkStatus.LIGHT) && (this.isClientSide || chunk.isLightCorrect()); -+ } -+ -+ @Override -+ protected void checkChunkEdges(final LightChunkGetter lightAccess, final ChunkAccess chunk, final int fromSection, -+ final int toSection) { -+ Arrays.fill(this.nullPropagationCheckCache, false); -+ this.rewriteNibbleCacheForSkylight(chunk); -+ final int chunkX = chunk.getPos().x; -+ final int chunkZ = chunk.getPos().z; -+ for (int y = toSection; y >= fromSection; --y) { -+ this.checkNullSection(chunkX, y, chunkZ, true); -+ } -+ -+ super.checkChunkEdges(lightAccess, chunk, fromSection, toSection); -+ } -+ -+ @Override -+ protected void checkChunkEdges(final LightChunkGetter lightAccess, final ChunkAccess chunk, final ShortCollection sections) { -+ Arrays.fill(this.nullPropagationCheckCache, false); -+ this.rewriteNibbleCacheForSkylight(chunk); -+ final int chunkX = chunk.getPos().x; -+ final int chunkZ = chunk.getPos().z; -+ for (final ShortIterator iterator = sections.iterator(); iterator.hasNext();) { -+ final int y = (int)iterator.nextShort(); -+ this.checkNullSection(chunkX, y, chunkZ, true); -+ } -+ -+ super.checkChunkEdges(lightAccess, chunk, sections); -+ } -+ -+ @Override -+ protected void checkBlock(final LightChunkGetter lightAccess, final int worldX, final int worldY, final int worldZ) { -+ // blocks can change opacity -+ // blocks can change direction of propagation -+ -+ // same logic applies from BlockStarLightEngine#checkBlock -+ -+ final int encodeOffset = this.coordinateOffset; -+ -+ final int currentLevel = this.getLightLevel(worldX, worldY, worldZ); -+ -+ if (currentLevel == 15) { -+ // must re-propagate clobbered source -+ this.appendToIncreaseQueue( -+ ((worldX + (worldZ << 6) + (worldY << (6 + 6)) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | (currentLevel & 0xFL) << (6 + 6 + 16) -+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4)) -+ | FLAG_HAS_SIDED_TRANSPARENT_BLOCKS // don't know if the block is conditionally transparent -+ ); -+ } else { -+ this.setLightLevel(worldX, worldY, worldZ, 0); -+ } -+ -+ this.appendToDecreaseQueue( -+ ((worldX + (worldZ << 6) + (worldY << (6 + 6)) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | (currentLevel & 0xFL) << (6 + 6 + 16) -+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4)) -+ ); -+ } -+ -+ protected final BlockPos.MutableBlockPos recalcCenterPos = new BlockPos.MutableBlockPos(); -+ protected final BlockPos.MutableBlockPos recalcNeighbourPos = new BlockPos.MutableBlockPos(); -+ -+ @Override -+ protected int calculateLightValue(final LightChunkGetter lightAccess, final int worldX, final int worldY, final int worldZ, -+ final int expect) { -+ if (expect == 15) { -+ return expect; -+ } -+ -+ final int sectionOffset = this.chunkSectionIndexOffset; -+ final BlockState centerState = this.getBlockState(worldX, worldY, worldZ); -+ int opacity = centerState.getOpacityIfCached(); -+ -+ final BlockState conditionallyOpaqueState; -+ if (opacity < 0) { -+ this.recalcCenterPos.set(worldX, worldY, worldZ); -+ opacity = Math.max(1, centerState.getLightBlock(lightAccess.getLevel(), this.recalcCenterPos)); -+ if (centerState.isConditionallyFullOpaque()) { -+ conditionallyOpaqueState = centerState; -+ } else { -+ conditionallyOpaqueState = null; -+ } -+ } else { -+ conditionallyOpaqueState = null; -+ opacity = Math.max(1, opacity); -+ } -+ -+ int level = 0; -+ -+ for (final AxisDirection direction : AXIS_DIRECTIONS) { -+ final int offX = worldX + direction.x; -+ final int offY = worldY + direction.y; -+ final int offZ = worldZ + direction.z; -+ -+ final int sectionIndex = (offX >> 4) + 5 * (offZ >> 4) + (5 * 5) * (offY >> 4) + sectionOffset; -+ -+ final int neighbourLevel = this.getLightLevel(sectionIndex, (offX & 15) | ((offZ & 15) << 4) | ((offY & 15) << 8)); -+ -+ if ((neighbourLevel - 1) <= level) { -+ // don't need to test transparency, we know it wont affect the result. -+ continue; -+ } -+ -+ final BlockState neighbourState = this.getBlockState(offX, offY, offZ); -+ -+ if (neighbourState.isConditionallyFullOpaque()) { -+ // here the block can be conditionally opaque (i.e light cannot propagate from it), so we need to test that -+ // we don't read the blockstate because most of the time this is false, so using the faster -+ // known transparency lookup results in a net win -+ this.recalcNeighbourPos.set(offX, offY, offZ); -+ final VoxelShape neighbourFace = neighbourState.getFaceOcclusionShape(lightAccess.getLevel(), this.recalcNeighbourPos, direction.opposite.nms); -+ final VoxelShape thisFace = conditionallyOpaqueState == null ? Shapes.empty() : conditionallyOpaqueState.getFaceOcclusionShape(lightAccess.getLevel(), this.recalcCenterPos, direction.nms); -+ if (Shapes.faceShapeOccludes(thisFace, neighbourFace)) { -+ // not allowed to propagate -+ continue; -+ } -+ } -+ -+ final int calculated = neighbourLevel - opacity; -+ level = Math.max(calculated, level); -+ if (level > expect) { -+ return level; -+ } -+ } -+ -+ return level; -+ } -+ -+ @Override -+ protected void propagateBlockChanges(final LightChunkGetter lightAccess, final ChunkAccess atChunk, final Set positions) { -+ this.rewriteNibbleCacheForSkylight(atChunk); -+ Arrays.fill(this.nullPropagationCheckCache, false); -+ -+ final BlockGetter world = lightAccess.getLevel(); -+ final int chunkX = atChunk.getPos().x; -+ final int chunkZ = atChunk.getPos().z; -+ final int heightMapOffset = chunkX * -16 + (chunkZ * (-16 * 16)); -+ -+ // setup heightmap for changes -+ for (final BlockPos pos : positions) { -+ final int index = pos.getX() + (pos.getZ() << 4) + heightMapOffset; -+ final int curr = this.heightMapBlockChange[index]; -+ if (pos.getY() > curr) { -+ this.heightMapBlockChange[index] = pos.getY(); -+ } -+ } -+ -+ // note: light sets are delayed while processing skylight source changes due to how -+ // nibbles are initialised, as we want to avoid clobbering nibble values so what when -+ // below nibbles are initialised they aren't reading from partially modified nibbles -+ -+ // now we can recalculate the sources for the changed columns -+ for (int index = 0; index < (16 * 16); ++index) { -+ final int maxY = this.heightMapBlockChange[index]; -+ if (maxY == Integer.MIN_VALUE) { -+ // not changed -+ continue; -+ } -+ this.heightMapBlockChange[index] = Integer.MIN_VALUE; // restore default for next caller -+ -+ final int columnX = (index & 15) | (chunkX << 4); -+ final int columnZ = (index >>> 4) | (chunkZ << 4); -+ -+ // try and propagate from the above y -+ // delay light set until after processing all sources to setup -+ final int maxPropagationY = this.tryPropagateSkylight(world, columnX, maxY, columnZ, true, true); -+ -+ // maxPropagationY is now the highest block that could not be propagated to -+ -+ // remove all sources below that are 15 -+ final long propagateDirection = AxisDirection.POSITIVE_Y.everythingButThisDirection; -+ final int encodeOffset = this.coordinateOffset; -+ -+ if (this.getLightLevelExtruded(columnX, maxPropagationY, columnZ) == 15) { -+ // ensure section is checked -+ this.checkNullSection(columnX >> 4, maxPropagationY >> 4, columnZ >> 4, true); -+ -+ for (int currY = maxPropagationY; currY >= (this.minLightSection << 4); --currY) { -+ if ((currY & 15) == 15) { -+ // ensure section is checked -+ this.checkNullSection(columnX >> 4, (currY >> 4), columnZ >> 4, true); -+ } -+ -+ // ensure section below is always checked -+ final SWMRNibbleArray nibble = this.getNibbleFromCache(columnX >> 4, currY >> 4, columnZ >> 4); -+ if (nibble == null) { -+ // advance currY to the the top of the section below -+ currY = (currY) & (~15); -+ // note: this value ^ is actually 1 above the top, but the loop decrements by 1 so we actually -+ // end up there -+ continue; -+ } -+ -+ if (nibble.getUpdating(columnX, currY, columnZ) != 15) { -+ break; -+ } -+ -+ // delay light set until after processing all sources to setup -+ this.appendToDecreaseQueue( -+ ((columnX + (columnZ << 6) + (currY << (6 + 6)) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | (15L << (6 + 6 + 16)) -+ | (propagateDirection << (6 + 6 + 16 + 4)) -+ // do not set transparent blocks for the same reason we don't in the checkBlock method -+ ); -+ } -+ } -+ } -+ -+ // delayed light sets are processed here, and must be processed before checkBlock as checkBlock reads -+ // immediate light value -+ this.processDelayedIncreases(); -+ this.processDelayedDecreases(); -+ -+ for (final BlockPos pos : positions) { -+ this.checkBlock(lightAccess, pos.getX(), pos.getY(), pos.getZ()); -+ } -+ -+ this.performLightDecrease(lightAccess); -+ } -+ -+ protected final int[] heightMapGen = new int[32 * 32]; -+ -+ @Override -+ protected void lightChunk(final LightChunkGetter lightAccess, final ChunkAccess chunk, final boolean needsEdgeChecks) { -+ this.rewriteNibbleCacheForSkylight(chunk); -+ Arrays.fill(this.nullPropagationCheckCache, false); -+ -+ final BlockGetter world = lightAccess.getLevel(); -+ final ChunkPos chunkPos = chunk.getPos(); -+ final int chunkX = chunkPos.x; -+ final int chunkZ = chunkPos.z; -+ -+ final LevelChunkSection[] sections = chunk.getSections(); -+ -+ int highestNonEmptySection = this.maxSection; -+ while (highestNonEmptySection == (this.minSection - 1) || -+ sections[highestNonEmptySection - this.minSection] == null || sections[highestNonEmptySection - this.minSection].hasOnlyAir()) { -+ this.checkNullSection(chunkX, highestNonEmptySection, chunkZ, false); -+ // try propagate FULL to neighbours -+ -+ // check neighbours to see if we need to propagate into them -+ for (final AxisDirection direction : ONLY_HORIZONTAL_DIRECTIONS) { -+ final int neighbourX = chunkX + direction.x; -+ final int neighbourZ = chunkZ + direction.z; -+ final SWMRNibbleArray neighbourNibble = this.getNibbleFromCache(neighbourX, highestNonEmptySection, neighbourZ); -+ if (neighbourNibble == null) { -+ // unloaded neighbour -+ // most of the time we fall here -+ continue; -+ } -+ -+ // it looks like we need to propagate into the neighbour -+ -+ final int incX; -+ final int incZ; -+ final int startX; -+ final int startZ; -+ -+ if (direction.x != 0) { -+ // x direction -+ incX = 0; -+ incZ = 1; -+ -+ if (direction.x < 0) { -+ // negative -+ startX = chunkX << 4; -+ } else { -+ startX = chunkX << 4 | 15; -+ } -+ startZ = chunkZ << 4; -+ } else { -+ // z direction -+ incX = 1; -+ incZ = 0; -+ -+ if (direction.z < 0) { -+ // negative -+ startZ = chunkZ << 4; -+ } else { -+ startZ = chunkZ << 4 | 15; -+ } -+ startX = chunkX << 4; -+ } -+ -+ final int encodeOffset = this.coordinateOffset; -+ final long propagateDirection = 1L << direction.ordinal(); // we only want to check in this direction -+ -+ for (int currY = highestNonEmptySection << 4, maxY = currY | 15; currY <= maxY; ++currY) { -+ for (int i = 0, currX = startX, currZ = startZ; i < 16; ++i, currX += incX, currZ += incZ) { -+ this.appendToIncreaseQueue( -+ ((currX + (currZ << 6) + (currY << (6 + 6)) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | (15L << (6 + 6 + 16)) // we know we're at full lit here -+ | (propagateDirection << (6 + 6 + 16 + 4)) -+ // no transparent flag, we know for a fact there are no blocks here that could be directionally transparent (as the section is EMPTY) -+ ); -+ } -+ } -+ } -+ -+ if (highestNonEmptySection-- == (this.minSection - 1)) { -+ break; -+ } -+ } -+ -+ if (highestNonEmptySection >= this.minSection) { -+ // fill out our other sources -+ final int minX = chunkPos.x << 4; -+ final int maxX = chunkPos.x << 4 | 15; -+ final int minZ = chunkPos.z << 4; -+ final int maxZ = chunkPos.z << 4 | 15; -+ final int startY = highestNonEmptySection << 4 | 15; -+ for (int currZ = minZ; currZ <= maxZ; ++currZ) { -+ for (int currX = minX; currX <= maxX; ++currX) { -+ this.tryPropagateSkylight(world, currX, startY + 1, currZ, false, false); -+ } -+ } -+ } // else: apparently the chunk is empty -+ -+ if (needsEdgeChecks) { -+ // not required to propagate here, but this will reduce the hit of the edge checks -+ this.performLightIncrease(lightAccess); -+ -+ for (int y = highestNonEmptySection; y >= this.minLightSection; --y) { -+ this.checkNullSection(chunkX, y, chunkZ, false); -+ } -+ // no need to rewrite the nibble cache again -+ super.checkChunkEdges(lightAccess, chunk, this.minLightSection, highestNonEmptySection); -+ } else { -+ for (int y = highestNonEmptySection; y >= this.minLightSection; --y) { -+ this.checkNullSection(chunkX, y, chunkZ, false); -+ } -+ this.propagateNeighbourLevels(lightAccess, chunk, this.minLightSection, highestNonEmptySection); -+ -+ this.performLightIncrease(lightAccess); -+ } -+ } -+ -+ protected final void processDelayedIncreases() { -+ // copied from performLightIncrease -+ final long[] queue = this.increaseQueue; -+ final int decodeOffsetX = -this.encodeOffsetX; -+ final int decodeOffsetY = -this.encodeOffsetY; -+ final int decodeOffsetZ = -this.encodeOffsetZ; -+ -+ for (int i = 0, len = this.increaseQueueInitialLength; i < len; ++i) { -+ final long queueValue = queue[i]; -+ -+ final int posX = ((int)queueValue & 63) + decodeOffsetX; -+ final int posZ = (((int)queueValue >>> 6) & 63) + decodeOffsetZ; -+ final int posY = (((int)queueValue >>> 12) & ((1 << 16) - 1)) + decodeOffsetY; -+ final int propagatedLightLevel = (int)((queueValue >>> (6 + 6 + 16)) & 0xF); -+ -+ this.setLightLevel(posX, posY, posZ, propagatedLightLevel); -+ } -+ } -+ -+ protected final void processDelayedDecreases() { -+ // copied from performLightDecrease -+ final long[] queue = this.decreaseQueue; -+ final int decodeOffsetX = -this.encodeOffsetX; -+ final int decodeOffsetY = -this.encodeOffsetY; -+ final int decodeOffsetZ = -this.encodeOffsetZ; -+ -+ for (int i = 0, len = this.decreaseQueueInitialLength; i < len; ++i) { -+ final long queueValue = queue[i]; -+ -+ final int posX = ((int)queueValue & 63) + decodeOffsetX; -+ final int posZ = (((int)queueValue >>> 6) & 63) + decodeOffsetZ; -+ final int posY = (((int)queueValue >>> 12) & ((1 << 16) - 1)) + decodeOffsetY; -+ -+ this.setLightLevel(posX, posY, posZ, 0); -+ } -+ } -+ -+ // delaying the light set is useful for block changes since they need to worry about initialising nibblearrays -+ // while also queueing light at the same time (initialising nibblearrays might depend on nibbles above, so -+ // clobbering the light values will result in broken propagation) -+ protected final int tryPropagateSkylight(final BlockGetter world, final int worldX, int startY, final int worldZ, -+ final boolean extrudeInitialised, final boolean delayLightSet) { -+ final BlockPos.MutableBlockPos mutablePos = this.mutablePos3; -+ final int encodeOffset = this.coordinateOffset; -+ final long propagateDirection = AxisDirection.POSITIVE_Y.everythingButThisDirection; // just don't check upwards. -+ -+ if (this.getLightLevelExtruded(worldX, startY + 1, worldZ) != 15) { -+ return startY; -+ } -+ -+ // ensure this section is always checked -+ this.checkNullSection(worldX >> 4, startY >> 4, worldZ >> 4, extrudeInitialised); -+ -+ BlockState above = this.getBlockState(worldX, startY + 1, worldZ); -+ -+ for (;startY >= (this.minLightSection << 4); --startY) { -+ if ((startY & 15) == 15) { -+ // ensure this section is always checked -+ this.checkNullSection(worldX >> 4, startY >> 4, worldZ >> 4, extrudeInitialised); -+ } -+ final BlockState current = this.getBlockState(worldX, startY, worldZ); -+ -+ final VoxelShape fromShape; -+ if (above.isConditionallyFullOpaque()) { -+ this.mutablePos2.set(worldX, startY + 1, worldZ); -+ fromShape = above.getFaceOcclusionShape(world, this.mutablePos2, AxisDirection.NEGATIVE_Y.nms); -+ if (Shapes.faceShapeOccludes(Shapes.empty(), fromShape)) { -+ // above wont let us propagate -+ break; -+ } -+ } else { -+ fromShape = Shapes.empty(); -+ } -+ -+ final int opacityIfCached = current.getOpacityIfCached(); -+ // does light propagate from the top down? -+ if (opacityIfCached != -1) { -+ if (opacityIfCached != 0) { -+ // we cannot propagate 15 through this -+ break; -+ } -+ // most of the time it falls here. -+ // add to propagate -+ // light set delayed until we determine if this nibble section is null -+ this.appendToIncreaseQueue( -+ ((worldX + (worldZ << 6) + (startY << (6 + 6)) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | (15L << (6 + 6 + 16)) // we know we're at full lit here -+ | (propagateDirection << (6 + 6 + 16 + 4)) -+ ); -+ } else { -+ mutablePos.set(worldX, startY, worldZ); -+ long flags = 0L; -+ if (current.isConditionallyFullOpaque()) { -+ final VoxelShape cullingFace = current.getFaceOcclusionShape(world, mutablePos, AxisDirection.POSITIVE_Y.nms); -+ -+ if (Shapes.faceShapeOccludes(fromShape, cullingFace)) { -+ // can't propagate here, we're done on this column. -+ break; -+ } -+ flags |= FLAG_HAS_SIDED_TRANSPARENT_BLOCKS; -+ } -+ -+ final int opacity = current.getLightBlock(world, mutablePos); -+ if (opacity > 0) { -+ // let the queued value (if any) handle it from here. -+ break; -+ } -+ -+ // light set delayed until we determine if this nibble section is null -+ this.appendToIncreaseQueue( -+ ((worldX + (worldZ << 6) + (startY << (6 + 6)) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | (15L << (6 + 6 + 16)) // we know we're at full lit here -+ | (propagateDirection << (6 + 6 + 16 + 4)) -+ | flags -+ ); -+ } -+ -+ above = current; -+ -+ if (this.getNibbleFromCache(worldX >> 4, startY >> 4, worldZ >> 4) == null) { -+ // we skip empty sections here, as this is just an easy way of making sure the above block -+ // can propagate through air. -+ -+ // nothing can propagate in null sections, remove the queue entry for it -+ --this.increaseQueueInitialLength; -+ -+ // advance currY to the the top of the section below -+ startY = (startY) & (~15); -+ // note: this value ^ is actually 1 above the top, but the loop decrements by 1 so we actually -+ // end up there -+ -+ // make sure this is marked as AIR -+ above = AIR_BLOCK_STATE; -+ } else if (!delayLightSet) { -+ this.setLightLevel(worldX, startY, worldZ, 15); -+ } -+ } -+ -+ return startY; -+ } -+} -diff --git a/src/main/java/ca/spottedleaf/starlight/common/light/StarLightEngine.java b/src/main/java/ca/spottedleaf/starlight/common/light/StarLightEngine.java -new file mode 100644 -index 0000000000000000000000000000000000000000..ad1eeebe6de219143492b94da309cb54ae9e0a5b ---- /dev/null -+++ b/src/main/java/ca/spottedleaf/starlight/common/light/StarLightEngine.java -@@ -0,0 +1,1572 @@ -+package ca.spottedleaf.starlight.common.light; -+ -+import ca.spottedleaf.starlight.common.util.CoordinateUtils; -+import ca.spottedleaf.starlight.common.util.IntegerUtil; -+import ca.spottedleaf.starlight.common.util.WorldUtil; -+import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap; -+import it.unimi.dsi.fastutil.shorts.ShortCollection; -+import it.unimi.dsi.fastutil.shorts.ShortIterator; -+import net.minecraft.core.BlockPos; -+import net.minecraft.core.Direction; -+import net.minecraft.core.SectionPos; -+import net.minecraft.world.level.BlockGetter; -+import net.minecraft.world.level.ChunkPos; -+import net.minecraft.world.level.Level; -+import net.minecraft.world.level.LevelHeightAccessor; -+import net.minecraft.world.level.LightLayer; -+import net.minecraft.world.level.block.Blocks; -+import net.minecraft.world.level.block.state.BlockState; -+import net.minecraft.world.level.chunk.ChunkAccess; -+import net.minecraft.world.level.chunk.LevelChunkSection; -+import net.minecraft.world.level.chunk.LightChunkGetter; -+import net.minecraft.world.phys.shapes.Shapes; -+import net.minecraft.world.phys.shapes.VoxelShape; -+import java.util.ArrayList; -+import java.util.Arrays; -+import java.util.List; -+import java.util.Set; -+import java.util.function.Consumer; -+import java.util.function.IntConsumer; -+ -+public abstract class StarLightEngine { -+ -+ protected static final BlockState AIR_BLOCK_STATE = Blocks.AIR.defaultBlockState(); -+ -+ protected static final AxisDirection[] DIRECTIONS = AxisDirection.values(); -+ protected static final AxisDirection[] AXIS_DIRECTIONS = DIRECTIONS; -+ protected static final AxisDirection[] ONLY_HORIZONTAL_DIRECTIONS = new AxisDirection[] { -+ AxisDirection.POSITIVE_X, AxisDirection.NEGATIVE_X, -+ AxisDirection.POSITIVE_Z, AxisDirection.NEGATIVE_Z -+ }; -+ -+ protected static enum AxisDirection { -+ -+ // Declaration order is important and relied upon. Do not change without modifying propagation code. -+ POSITIVE_X(1, 0, 0), NEGATIVE_X(-1, 0, 0), -+ POSITIVE_Z(0, 0, 1), NEGATIVE_Z(0, 0, -1), -+ POSITIVE_Y(0, 1, 0), NEGATIVE_Y(0, -1, 0); -+ -+ static { -+ POSITIVE_X.opposite = NEGATIVE_X; NEGATIVE_X.opposite = POSITIVE_X; -+ POSITIVE_Z.opposite = NEGATIVE_Z; NEGATIVE_Z.opposite = POSITIVE_Z; -+ POSITIVE_Y.opposite = NEGATIVE_Y; NEGATIVE_Y.opposite = POSITIVE_Y; -+ } -+ -+ protected AxisDirection opposite; -+ -+ public final int x; -+ public final int y; -+ public final int z; -+ public final Direction nms; -+ public final long everythingButThisDirection; -+ public final long everythingButTheOppositeDirection; -+ -+ AxisDirection(final int x, final int y, final int z) { -+ this.x = x; -+ this.y = y; -+ this.z = z; -+ this.nms = Direction.fromDelta(x, y, z); -+ this.everythingButThisDirection = (long)(ALL_DIRECTIONS_BITSET ^ (1 << this.ordinal())); -+ // positive is always even, negative is always odd. Flip the 1 bit to get the negative direction. -+ this.everythingButTheOppositeDirection = (long)(ALL_DIRECTIONS_BITSET ^ (1 << (this.ordinal() ^ 1))); -+ } -+ -+ public AxisDirection getOpposite() { -+ return this.opposite; -+ } -+ } -+ -+ // I'd like to thank https://www.seedofandromeda.com/blogs/29-fast-flood-fill-lighting-in-a-blocky-voxel-game-pt-1 -+ // for explaining how light propagates via breadth-first search -+ -+ // While the above is a good start to understanding the general idea of what the general principles are, it's not -+ // exactly how the vanilla light engine should behave for minecraft. -+ -+ // similar to the above, except the chunk section indices vary from [-1, 1], or [0, 2] -+ // for the y chunk section it's from [minLightSection, maxLightSection] or [0, maxLightSection - minLightSection] -+ // index = x + (z * 5) + (y * 25) -+ // null index indicates the chunk section doesn't exist (empty or out of bounds) -+ protected final LevelChunkSection[] sectionCache; -+ -+ // the exact same as above, except for storing fast access to SWMRNibbleArray -+ // for the y chunk section it's from [minLightSection, maxLightSection] or [0, maxLightSection - minLightSection] -+ // index = x + (z * 5) + (y * 25) -+ protected final SWMRNibbleArray[] nibbleCache; -+ -+ // the exact same as above, except for storing fast access to nibbles to call change callbacks for -+ // for the y chunk section it's from [minLightSection, maxLightSection] or [0, maxLightSection - minLightSection] -+ // index = x + (z * 5) + (y * 25) -+ protected final boolean[] notifyUpdateCache; -+ -+ // always initialsed during start of lighting. -+ // index = x + (z * 5) -+ protected final ChunkAccess[] chunkCache = new ChunkAccess[5 * 5]; -+ -+ // index = x + (z * 5) -+ protected final boolean[][] emptinessMapCache = new boolean[5 * 5][]; -+ -+ protected final BlockPos.MutableBlockPos mutablePos1 = new BlockPos.MutableBlockPos(); -+ protected final BlockPos.MutableBlockPos mutablePos2 = new BlockPos.MutableBlockPos(); -+ protected final BlockPos.MutableBlockPos mutablePos3 = new BlockPos.MutableBlockPos(); -+ -+ protected int encodeOffsetX; -+ protected int encodeOffsetY; -+ protected int encodeOffsetZ; -+ -+ protected int coordinateOffset; -+ -+ protected int chunkOffsetX; -+ protected int chunkOffsetY; -+ protected int chunkOffsetZ; -+ -+ protected int chunkIndexOffset; -+ protected int chunkSectionIndexOffset; -+ -+ protected final boolean skylightPropagator; -+ protected final int emittedLightMask; -+ protected final boolean isClientSide; -+ -+ protected final Level world; -+ protected final int minLightSection; -+ protected final int maxLightSection; -+ protected final int minSection; -+ protected final int maxSection; -+ -+ protected StarLightEngine(final boolean skylightPropagator, final Level world) { -+ this.skylightPropagator = skylightPropagator; -+ this.emittedLightMask = skylightPropagator ? 0 : 0xF; -+ this.isClientSide = world.isClientSide; -+ this.world = world; -+ this.minLightSection = WorldUtil.getMinLightSection(world); -+ this.maxLightSection = WorldUtil.getMaxLightSection(world); -+ this.minSection = WorldUtil.getMinSection(world); -+ this.maxSection = WorldUtil.getMaxSection(world); -+ -+ this.sectionCache = new LevelChunkSection[5 * 5 * ((this.maxLightSection - this.minLightSection + 1) + 2)]; // add two extra sections for buffer -+ this.nibbleCache = new SWMRNibbleArray[5 * 5 * ((this.maxLightSection - this.minLightSection + 1) + 2)]; // add two extra sections for buffer -+ this.notifyUpdateCache = new boolean[5 * 5 * ((this.maxLightSection - this.minLightSection + 1) + 2)]; // add two extra sections for buffer -+ } -+ -+ protected final void setupEncodeOffset(final int centerX, final int centerY, final int centerZ) { -+ // 31 = center + encodeOffset -+ this.encodeOffsetX = 31 - centerX; -+ this.encodeOffsetY = (-(this.minLightSection - 1) << 4); // we want 0 to be the smallest encoded value -+ this.encodeOffsetZ = 31 - centerZ; -+ -+ // coordinateIndex = x | (z << 6) | (y << 12) -+ this.coordinateOffset = this.encodeOffsetX + (this.encodeOffsetZ << 6) + (this.encodeOffsetY << 12); -+ -+ // 2 = (centerX >> 4) + chunkOffset -+ this.chunkOffsetX = 2 - (centerX >> 4); -+ this.chunkOffsetY = -(this.minLightSection - 1); // lowest should be 0 -+ this.chunkOffsetZ = 2 - (centerZ >> 4); -+ -+ // chunk index = x + (5 * z) -+ this.chunkIndexOffset = this.chunkOffsetX + (5 * this.chunkOffsetZ); -+ -+ // chunk section index = x + (5 * z) + ((5*5) * y) -+ this.chunkSectionIndexOffset = this.chunkIndexOffset + ((5 * 5) * this.chunkOffsetY); -+ } -+ -+ protected final void setupCaches(final LightChunkGetter chunkProvider, final int centerX, final int centerY, final int centerZ, -+ final boolean relaxed, final boolean tryToLoadChunksFor2Radius) { -+ final int centerChunkX = centerX >> 4; -+ final int centerChunkY = centerY >> 4; -+ final int centerChunkZ = centerZ >> 4; -+ -+ this.setupEncodeOffset(centerChunkX * 16 + 7, centerChunkY * 16 + 7, centerChunkZ * 16 + 7); -+ -+ final int radius = tryToLoadChunksFor2Radius ? 2 : 1; -+ -+ for (int dz = -radius; dz <= radius; ++dz) { -+ for (int dx = -radius; dx <= radius; ++dx) { -+ final int cx = centerChunkX + dx; -+ final int cz = centerChunkZ + dz; -+ final boolean isTwoRadius = Math.max(IntegerUtil.branchlessAbs(dx), IntegerUtil.branchlessAbs(dz)) == 2; -+ final ChunkAccess chunk = (ChunkAccess)chunkProvider.getChunkForLighting(cx, cz); -+ -+ if (chunk == null) { -+ if (relaxed | isTwoRadius) { -+ continue; -+ } -+ throw new IllegalArgumentException("Trying to propagate light update before 1 radius neighbours ready"); -+ } -+ -+ if (!this.canUseChunk(chunk)) { -+ continue; -+ } -+ -+ this.setChunkInCache(cx, cz, chunk); -+ this.setEmptinessMapCache(cx, cz, this.getEmptinessMap(chunk)); -+ if (!isTwoRadius) { -+ this.setBlocksForChunkInCache(cx, cz, chunk.getSections()); -+ this.setNibblesForChunkInCache(cx, cz, this.getNibblesOnChunk(chunk)); -+ } -+ } -+ } -+ } -+ -+ protected final ChunkAccess getChunkInCache(final int chunkX, final int chunkZ) { -+ return this.chunkCache[chunkX + 5*chunkZ + this.chunkIndexOffset]; -+ } -+ -+ protected final void setChunkInCache(final int chunkX, final int chunkZ, final ChunkAccess chunk) { -+ this.chunkCache[chunkX + 5*chunkZ + this.chunkIndexOffset] = chunk; -+ } -+ -+ protected final LevelChunkSection getChunkSection(final int chunkX, final int chunkY, final int chunkZ) { -+ return this.sectionCache[chunkX + 5*chunkZ + (5 * 5) * chunkY + this.chunkSectionIndexOffset]; -+ } -+ -+ protected final void setChunkSectionInCache(final int chunkX, final int chunkY, final int chunkZ, final LevelChunkSection section) { -+ this.sectionCache[chunkX + 5*chunkZ + 5*5*chunkY + this.chunkSectionIndexOffset] = section; -+ } -+ -+ protected final void setBlocksForChunkInCache(final int chunkX, final int chunkZ, final LevelChunkSection[] sections) { -+ for (int cy = this.minLightSection; cy <= this.maxLightSection; ++cy) { -+ this.setChunkSectionInCache(chunkX, cy, chunkZ, -+ sections == null ? null : (cy >= this.minSection && cy <= this.maxSection ? sections[cy - this.minSection] : null)); -+ } -+ } -+ -+ protected final SWMRNibbleArray getNibbleFromCache(final int chunkX, final int chunkY, final int chunkZ) { -+ return this.nibbleCache[chunkX + 5*chunkZ + (5 * 5) * chunkY + this.chunkSectionIndexOffset]; -+ } -+ -+ protected final SWMRNibbleArray[] getNibblesForChunkFromCache(final int chunkX, final int chunkZ) { -+ final SWMRNibbleArray[] ret = new SWMRNibbleArray[this.maxLightSection - this.minLightSection + 1]; -+ -+ for (int cy = this.minLightSection; cy <= this.maxLightSection; ++cy) { -+ ret[cy - this.minLightSection] = this.nibbleCache[chunkX + 5*chunkZ + (cy * (5 * 5)) + this.chunkSectionIndexOffset]; -+ } -+ -+ return ret; -+ } -+ -+ protected final void setNibbleInCache(final int chunkX, final int chunkY, final int chunkZ, final SWMRNibbleArray nibble) { -+ this.nibbleCache[chunkX + 5*chunkZ + (5 * 5) * chunkY + this.chunkSectionIndexOffset] = nibble; -+ } -+ -+ protected final void setNibblesForChunkInCache(final int chunkX, final int chunkZ, final SWMRNibbleArray[] nibbles) { -+ for (int cy = this.minLightSection; cy <= this.maxLightSection; ++cy) { -+ this.setNibbleInCache(chunkX, cy, chunkZ, nibbles == null ? null : nibbles[cy - this.minLightSection]); -+ } -+ } -+ -+ protected final void updateVisible(final LightChunkGetter lightAccess) { -+ for (int index = 0, max = this.nibbleCache.length; index < max; ++index) { -+ final SWMRNibbleArray nibble = this.nibbleCache[index]; -+ if (!this.notifyUpdateCache[index] && (nibble == null || !nibble.isDirty())) { -+ continue; -+ } -+ -+ final int chunkX = (index % 5) - this.chunkOffsetX; -+ final int chunkZ = ((index / 5) % 5) - this.chunkOffsetZ; -+ final int ySections = (this.maxSection - this.minSection) + 1; -+ final int chunkY = ((index / (5*5)) % (ySections + 2 + 2)) - this.chunkOffsetY; -+ if ((nibble != null && nibble.updateVisible()) || this.notifyUpdateCache[index]) { -+ lightAccess.onLightUpdate(this.skylightPropagator ? LightLayer.SKY : LightLayer.BLOCK, SectionPos.of(chunkX, chunkY, chunkZ)); -+ } -+ } -+ } -+ -+ protected final void destroyCaches() { -+ Arrays.fill(this.sectionCache, null); -+ Arrays.fill(this.nibbleCache, null); -+ Arrays.fill(this.chunkCache, null); -+ Arrays.fill(this.emptinessMapCache, null); -+ if (this.isClientSide) { -+ Arrays.fill(this.notifyUpdateCache, false); -+ } -+ } -+ -+ protected final BlockState getBlockState(final int worldX, final int worldY, final int worldZ) { -+ final LevelChunkSection section = this.sectionCache[(worldX >> 4) + 5 * (worldZ >> 4) + (5 * 5) * (worldY >> 4) + this.chunkSectionIndexOffset]; -+ -+ if (section != null) { -+ return section.hasOnlyAir() ? AIR_BLOCK_STATE : section.getBlockState(worldX & 15, worldY & 15, worldZ & 15); -+ } -+ -+ return AIR_BLOCK_STATE; -+ } -+ -+ protected final BlockState getBlockState(final int sectionIndex, final int localIndex) { -+ final LevelChunkSection section = this.sectionCache[sectionIndex]; -+ -+ if (section != null) { -+ return section.hasOnlyAir() ? AIR_BLOCK_STATE : section.states.get(localIndex); -+ } -+ -+ return AIR_BLOCK_STATE; -+ } -+ -+ protected final int getLightLevel(final int worldX, final int worldY, final int worldZ) { -+ final SWMRNibbleArray nibble = this.nibbleCache[(worldX >> 4) + 5 * (worldZ >> 4) + (5 * 5) * (worldY >> 4) + this.chunkSectionIndexOffset]; -+ -+ return nibble == null ? 0 : nibble.getUpdating((worldX & 15) | ((worldZ & 15) << 4) | ((worldY & 15) << 8)); -+ } -+ -+ protected final int getLightLevel(final int sectionIndex, final int localIndex) { -+ final SWMRNibbleArray nibble = this.nibbleCache[sectionIndex]; -+ -+ return nibble == null ? 0 : nibble.getUpdating(localIndex); -+ } -+ -+ protected final void setLightLevel(final int worldX, final int worldY, final int worldZ, final int level) { -+ final int sectionIndex = (worldX >> 4) + 5 * (worldZ >> 4) + (5 * 5) * (worldY >> 4) + this.chunkSectionIndexOffset; -+ final SWMRNibbleArray nibble = this.nibbleCache[sectionIndex]; -+ -+ if (nibble != null) { -+ nibble.set((worldX & 15) | ((worldZ & 15) << 4) | ((worldY & 15) << 8), level); -+ if (this.isClientSide) { -+ int cx1 = (worldX - 1) >> 4; -+ int cx2 = (worldX + 1) >> 4; -+ int cy1 = (worldY - 1) >> 4; -+ int cy2 = (worldY + 1) >> 4; -+ int cz1 = (worldZ - 1) >> 4; -+ int cz2 = (worldZ + 1) >> 4; -+ for (int x = cx1; x <= cx2; ++x) { -+ for (int y = cy1; y <= cy2; ++y) { -+ for (int z = cz1; z <= cz2; ++z) { -+ this.notifyUpdateCache[x + 5 * z + (5 * 5) * y + this.chunkSectionIndexOffset] = true; -+ } -+ } -+ } -+ } -+ } -+ } -+ -+ protected final void postLightUpdate(final int worldX, final int worldY, final int worldZ) { -+ if (this.isClientSide) { -+ int cx1 = (worldX - 1) >> 4; -+ int cx2 = (worldX + 1) >> 4; -+ int cy1 = (worldY - 1) >> 4; -+ int cy2 = (worldY + 1) >> 4; -+ int cz1 = (worldZ - 1) >> 4; -+ int cz2 = (worldZ + 1) >> 4; -+ for (int x = cx1; x <= cx2; ++x) { -+ for (int y = cy1; y <= cy2; ++y) { -+ for (int z = cz1; z <= cz2; ++z) { -+ this.notifyUpdateCache[x + (5 * z) + (5 * 5 * y) + this.chunkSectionIndexOffset] = true; -+ } -+ } -+ } -+ } -+ } -+ -+ protected final void setLightLevel(final int sectionIndex, final int localIndex, final int worldX, final int worldY, final int worldZ, final int level) { -+ final SWMRNibbleArray nibble = this.nibbleCache[sectionIndex]; -+ -+ if (nibble != null) { -+ nibble.set(localIndex, level); -+ if (this.isClientSide) { -+ int cx1 = (worldX - 1) >> 4; -+ int cx2 = (worldX + 1) >> 4; -+ int cy1 = (worldY - 1) >> 4; -+ int cy2 = (worldY + 1) >> 4; -+ int cz1 = (worldZ - 1) >> 4; -+ int cz2 = (worldZ + 1) >> 4; -+ for (int x = cx1; x <= cx2; ++x) { -+ for (int y = cy1; y <= cy2; ++y) { -+ for (int z = cz1; z <= cz2; ++z) { -+ this.notifyUpdateCache[x + (5 * z) + (5 * 5 * y) + this.chunkSectionIndexOffset] = true; -+ } -+ } -+ } -+ } -+ } -+ } -+ -+ protected final boolean[] getEmptinessMap(final int chunkX, final int chunkZ) { -+ return this.emptinessMapCache[chunkX + 5*chunkZ + this.chunkIndexOffset]; -+ } -+ -+ protected final void setEmptinessMapCache(final int chunkX, final int chunkZ, final boolean[] emptinessMap) { -+ this.emptinessMapCache[chunkX + 5*chunkZ + this.chunkIndexOffset] = emptinessMap; -+ } -+ -+ public static SWMRNibbleArray[] getFilledEmptyLight(final LevelHeightAccessor world) { -+ return getFilledEmptyLight(WorldUtil.getTotalLightSections(world)); -+ } -+ -+ private static SWMRNibbleArray[] getFilledEmptyLight(final int totalLightSections) { -+ final SWMRNibbleArray[] ret = new SWMRNibbleArray[totalLightSections]; -+ -+ for (int i = 0, len = ret.length; i < len; ++i) { -+ ret[i] = new SWMRNibbleArray(null, true); -+ } -+ -+ return ret; -+ } -+ -+ protected abstract boolean[] getEmptinessMap(final ChunkAccess chunk); -+ -+ protected abstract void setEmptinessMap(final ChunkAccess chunk, final boolean[] to); -+ -+ protected abstract SWMRNibbleArray[] getNibblesOnChunk(final ChunkAccess chunk); -+ -+ protected abstract void setNibbles(final ChunkAccess chunk, final SWMRNibbleArray[] to); -+ -+ protected abstract boolean canUseChunk(final ChunkAccess chunk); -+ -+ public final void blocksChangedInChunk(final LightChunkGetter lightAccess, final int chunkX, final int chunkZ, -+ final Set positions, final Boolean[] changedSections) { -+ this.setupCaches(lightAccess, chunkX * 16 + 7, 128, chunkZ * 16 + 7, true, true); -+ try { -+ final ChunkAccess chunk = this.getChunkInCache(chunkX, chunkZ); -+ if (chunk == null) { -+ return; -+ } -+ if (changedSections != null) { -+ final boolean[] ret = this.handleEmptySectionChanges(lightAccess, chunk, changedSections, false); -+ if (ret != null) { -+ this.setEmptinessMap(chunk, ret); -+ } -+ } -+ if (!positions.isEmpty()) { -+ this.propagateBlockChanges(lightAccess, chunk, positions); -+ } -+ this.updateVisible(lightAccess); -+ } finally { -+ this.destroyCaches(); -+ } -+ } -+ -+ // subclasses should not initialise caches, as this will always be done by the super call -+ // subclasses should not invoke updateVisible, as this will always be done by the super call -+ protected abstract void propagateBlockChanges(final LightChunkGetter lightAccess, final ChunkAccess atChunk, final Set positions); -+ -+ protected abstract void checkBlock(final LightChunkGetter lightAccess, final int worldX, final int worldY, final int worldZ); -+ -+ // if ret > expect, then the real value is at least ret (early returns if ret > expect, rather than calculating actual) -+ // if ret == expect, then expect is the correct light value for pos -+ // if ret < expect, then ret is the real light value -+ protected abstract int calculateLightValue(final LightChunkGetter lightAccess, final int worldX, final int worldY, final int worldZ, -+ final int expect); -+ -+ protected final int[] chunkCheckDelayedUpdatesCenter = new int[16 * 16]; -+ protected final int[] chunkCheckDelayedUpdatesNeighbour = new int[16 * 16]; -+ -+ protected void checkChunkEdge(final LightChunkGetter lightAccess, final ChunkAccess chunk, -+ final int chunkX, final int chunkY, final int chunkZ) { -+ final SWMRNibbleArray currNibble = this.getNibbleFromCache(chunkX, chunkY, chunkZ); -+ if (currNibble == null) { -+ return; -+ } -+ -+ for (final AxisDirection direction : ONLY_HORIZONTAL_DIRECTIONS) { -+ final int neighbourOffX = direction.x; -+ final int neighbourOffZ = direction.z; -+ -+ final SWMRNibbleArray neighbourNibble = this.getNibbleFromCache(chunkX + neighbourOffX, -+ chunkY, chunkZ + neighbourOffZ); -+ -+ if (neighbourNibble == null) { -+ continue; -+ } -+ -+ if (!currNibble.isInitialisedUpdating() && !neighbourNibble.isInitialisedUpdating()) { -+ // both are zero, nothing to check. -+ continue; -+ } -+ -+ // this chunk -+ final int incX; -+ final int incZ; -+ final int startX; -+ final int startZ; -+ -+ if (neighbourOffX != 0) { -+ // x direction -+ incX = 0; -+ incZ = 1; -+ -+ if (direction.x < 0) { -+ // negative -+ startX = chunkX << 4; -+ } else { -+ startX = chunkX << 4 | 15; -+ } -+ startZ = chunkZ << 4; -+ } else { -+ // z direction -+ incX = 1; -+ incZ = 0; -+ -+ if (neighbourOffZ < 0) { -+ // negative -+ startZ = chunkZ << 4; -+ } else { -+ startZ = chunkZ << 4 | 15; -+ } -+ startX = chunkX << 4; -+ } -+ -+ int centerDelayedChecks = 0; -+ int neighbourDelayedChecks = 0; -+ for (int currY = chunkY << 4, maxY = currY | 15; currY <= maxY; ++currY) { -+ for (int i = 0, currX = startX, currZ = startZ; i < 16; ++i, currX += incX, currZ += incZ) { -+ final int neighbourX = currX + neighbourOffX; -+ final int neighbourZ = currZ + neighbourOffZ; -+ -+ final int currentIndex = (currX & 15) | -+ ((currZ & 15)) << 4 | -+ ((currY & 15) << 8); -+ final int currentLevel = currNibble.getUpdating(currentIndex); -+ -+ final int neighbourIndex = -+ (neighbourX & 15) | -+ ((neighbourZ & 15)) << 4 | -+ ((currY & 15) << 8); -+ final int neighbourLevel = neighbourNibble.getUpdating(neighbourIndex); -+ -+ // the checks are delayed because the checkBlock method clobbers light values - which then -+ // affect later calculate light value operations. While they don't affect it in a behaviourly significant -+ // way, they do have a negative performance impact due to simply queueing more values -+ -+ if (this.calculateLightValue(lightAccess, currX, currY, currZ, currentLevel) != currentLevel) { -+ this.chunkCheckDelayedUpdatesCenter[centerDelayedChecks++] = currentIndex; -+ } -+ -+ if (this.calculateLightValue(lightAccess, neighbourX, currY, neighbourZ, neighbourLevel) != neighbourLevel) { -+ this.chunkCheckDelayedUpdatesNeighbour[neighbourDelayedChecks++] = neighbourIndex; -+ } -+ } -+ } -+ -+ final int currentChunkOffX = chunkX << 4; -+ final int currentChunkOffZ = chunkZ << 4; -+ final int neighbourChunkOffX = (chunkX + direction.x) << 4; -+ final int neighbourChunkOffZ = (chunkZ + direction.z) << 4; -+ final int chunkOffY = chunkY << 4; -+ for (int i = 0, len = Math.max(centerDelayedChecks, neighbourDelayedChecks); i < len; ++i) { -+ // try to queue neighbouring data together -+ // index = x | (z << 4) | (y << 8) -+ if (i < centerDelayedChecks) { -+ final int value = this.chunkCheckDelayedUpdatesCenter[i]; -+ this.checkBlock(lightAccess, currentChunkOffX | (value & 15), -+ chunkOffY | (value >>> 8), -+ currentChunkOffZ | ((value >>> 4) & 0xF)); -+ } -+ if (i < neighbourDelayedChecks) { -+ final int value = this.chunkCheckDelayedUpdatesNeighbour[i]; -+ this.checkBlock(lightAccess, neighbourChunkOffX | (value & 15), -+ chunkOffY | (value >>> 8), -+ neighbourChunkOffZ | ((value >>> 4) & 0xF)); -+ } -+ } -+ } -+ } -+ -+ protected void checkChunkEdges(final LightChunkGetter lightAccess, final ChunkAccess chunk, final ShortCollection sections) { -+ final ChunkPos chunkPos = chunk.getPos(); -+ final int chunkX = chunkPos.x; -+ final int chunkZ = chunkPos.z; -+ -+ for (final ShortIterator iterator = sections.iterator(); iterator.hasNext();) { -+ this.checkChunkEdge(lightAccess, chunk, chunkX, iterator.nextShort(), chunkZ); -+ } -+ -+ this.performLightDecrease(lightAccess); -+ } -+ -+ // subclasses should not initialise caches, as this will always be done by the super call -+ // subclasses should not invoke updateVisible, as this will always be done by the super call -+ // verifies that light levels on this chunks edges are consistent with this chunk's neighbours -+ // edges. if they are not, they are decreased (effectively performing the logic in checkBlock). -+ // This does not resolve skylight source problems. -+ protected void checkChunkEdges(final LightChunkGetter lightAccess, final ChunkAccess chunk, final int fromSection, final int toSection) { -+ final ChunkPos chunkPos = chunk.getPos(); -+ final int chunkX = chunkPos.x; -+ final int chunkZ = chunkPos.z; -+ -+ for (int currSectionY = toSection; currSectionY >= fromSection; --currSectionY) { -+ this.checkChunkEdge(lightAccess, chunk, chunkX, currSectionY, chunkZ); -+ } -+ -+ this.performLightDecrease(lightAccess); -+ } -+ -+ // pulls light from neighbours, and adds them into the increase queue. does not actually propagate. -+ protected final void propagateNeighbourLevels(final LightChunkGetter lightAccess, final ChunkAccess chunk, final int fromSection, final int toSection) { -+ final ChunkPos chunkPos = chunk.getPos(); -+ final int chunkX = chunkPos.x; -+ final int chunkZ = chunkPos.z; -+ -+ for (int currSectionY = toSection; currSectionY >= fromSection; --currSectionY) { -+ final SWMRNibbleArray currNibble = this.getNibbleFromCache(chunkX, currSectionY, chunkZ); -+ if (currNibble == null) { -+ continue; -+ } -+ for (final AxisDirection direction : ONLY_HORIZONTAL_DIRECTIONS) { -+ final int neighbourOffX = direction.x; -+ final int neighbourOffZ = direction.z; -+ -+ final SWMRNibbleArray neighbourNibble = this.getNibbleFromCache(chunkX + neighbourOffX, -+ currSectionY, chunkZ + neighbourOffZ); -+ -+ if (neighbourNibble == null || !neighbourNibble.isInitialisedUpdating()) { -+ // can't pull from 0 -+ continue; -+ } -+ -+ // neighbour chunk -+ final int incX; -+ final int incZ; -+ final int startX; -+ final int startZ; -+ -+ if (neighbourOffX != 0) { -+ // x direction -+ incX = 0; -+ incZ = 1; -+ -+ if (direction.x < 0) { -+ // negative -+ startX = (chunkX << 4) - 1; -+ } else { -+ startX = (chunkX << 4) + 16; -+ } -+ startZ = chunkZ << 4; -+ } else { -+ // z direction -+ incX = 1; -+ incZ = 0; -+ -+ if (neighbourOffZ < 0) { -+ // negative -+ startZ = (chunkZ << 4) - 1; -+ } else { -+ startZ = (chunkZ << 4) + 16; -+ } -+ startX = chunkX << 4; -+ } -+ -+ final long propagateDirection = 1L << direction.getOpposite().ordinal(); // we only want to check in this direction towards this chunk -+ final int encodeOffset = this.coordinateOffset; -+ -+ for (int currY = currSectionY << 4, maxY = currY | 15; currY <= maxY; ++currY) { -+ for (int i = 0, currX = startX, currZ = startZ; i < 16; ++i, currX += incX, currZ += incZ) { -+ final int level = neighbourNibble.getUpdating( -+ (currX & 15) -+ | ((currZ & 15) << 4) -+ | ((currY & 15) << 8) -+ ); -+ -+ if (level <= 1) { -+ // nothing to propagate -+ continue; -+ } -+ -+ this.appendToIncreaseQueue( -+ ((currX + (currZ << 6) + (currY << (6 + 6)) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | ((level & 0xFL) << (6 + 6 + 16)) -+ | (propagateDirection << (6 + 6 + 16 + 4)) -+ | FLAG_HAS_SIDED_TRANSPARENT_BLOCKS // don't know if the current block is transparent, must check. -+ ); -+ } -+ } -+ } -+ } -+ } -+ -+ public static Boolean[] getEmptySectionsForChunk(final ChunkAccess chunk) { -+ final LevelChunkSection[] sections = chunk.getSections(); -+ final Boolean[] ret = new Boolean[sections.length]; -+ -+ for (int i = 0; i < sections.length; ++i) { -+ if (sections[i] == null || sections[i].hasOnlyAir()) { -+ ret[i] = Boolean.TRUE; -+ } else { -+ ret[i] = Boolean.FALSE; -+ } -+ } -+ -+ return ret; -+ } -+ -+ public final void forceHandleEmptySectionChanges(final LightChunkGetter lightAccess, final ChunkAccess chunk, final Boolean[] emptinessChanges) { -+ final int chunkX = chunk.getPos().x; -+ final int chunkZ = chunk.getPos().z; -+ this.setupCaches(lightAccess, chunkX * 16 + 7, 128, chunkZ * 16 + 7, true, true); -+ try { -+ // force current chunk into cache -+ this.setChunkInCache(chunkX, chunkZ, chunk); -+ this.setBlocksForChunkInCache(chunkX, chunkZ, chunk.getSections()); -+ this.setNibblesForChunkInCache(chunkX, chunkZ, this.getNibblesOnChunk(chunk)); -+ this.setEmptinessMapCache(chunkX, chunkZ, this.getEmptinessMap(chunk)); -+ -+ final boolean[] ret = this.handleEmptySectionChanges(lightAccess, chunk, emptinessChanges, false); -+ if (ret != null) { -+ this.setEmptinessMap(chunk, ret); -+ } -+ this.updateVisible(lightAccess); -+ } finally { -+ this.destroyCaches(); -+ } -+ } -+ -+ public final void handleEmptySectionChanges(final LightChunkGetter lightAccess, final int chunkX, final int chunkZ, -+ final Boolean[] emptinessChanges) { -+ this.setupCaches(lightAccess, chunkX * 16 + 7, 128, chunkZ * 16 + 7, true, true); -+ try { -+ final ChunkAccess chunk = this.getChunkInCache(chunkX, chunkZ); -+ if (chunk == null) { -+ return; -+ } -+ final boolean[] ret = this.handleEmptySectionChanges(lightAccess, chunk, emptinessChanges, false); -+ if (ret != null) { -+ this.setEmptinessMap(chunk, ret); -+ } -+ this.updateVisible(lightAccess); -+ } finally { -+ this.destroyCaches(); -+ } -+ } -+ -+ protected abstract void initNibble(final int chunkX, final int chunkY, final int chunkZ, final boolean extrude, final boolean initRemovedNibbles); -+ -+ protected abstract void setNibbleNull(final int chunkX, final int chunkY, final int chunkZ); -+ -+ // subclasses should not initialise caches, as this will always be done by the super call -+ // subclasses should not invoke updateVisible, as this will always be done by the super call -+ // subclasses are guaranteed that this is always called before a changed block set -+ // newChunk specifies whether the changes describe a "first load" of a chunk or changes to existing, already loaded chunks -+ // rets non-null when the emptiness map changed and needs to be updated -+ protected final boolean[] handleEmptySectionChanges(final LightChunkGetter lightAccess, final ChunkAccess chunk, -+ final Boolean[] emptinessChanges, final boolean unlit) { -+ final Level world = (Level)lightAccess.getLevel(); -+ final int chunkX = chunk.getPos().x; -+ final int chunkZ = chunk.getPos().z; -+ -+ boolean[] chunkEmptinessMap = this.getEmptinessMap(chunkX, chunkZ); -+ boolean[] ret = null; -+ final boolean needsInit = unlit || chunkEmptinessMap == null; -+ if (needsInit) { -+ this.setEmptinessMapCache(chunkX, chunkZ, ret = chunkEmptinessMap = new boolean[WorldUtil.getTotalSections(world)]); -+ } -+ -+ // update emptiness map -+ for (int sectionIndex = (emptinessChanges.length - 1); sectionIndex >= 0; --sectionIndex) { -+ Boolean valueBoxed = emptinessChanges[sectionIndex]; -+ if (valueBoxed == null) { -+ if (!needsInit) { -+ continue; -+ } -+ final LevelChunkSection section = this.getChunkSection(chunkX, sectionIndex + this.minSection, chunkZ); -+ emptinessChanges[sectionIndex] = valueBoxed = section == null || section.hasOnlyAir() ? Boolean.TRUE : Boolean.FALSE; -+ } -+ chunkEmptinessMap[sectionIndex] = valueBoxed.booleanValue(); -+ } -+ -+ // now init neighbour nibbles -+ for (int sectionIndex = (emptinessChanges.length - 1); sectionIndex >= 0; --sectionIndex) { -+ final Boolean valueBoxed = emptinessChanges[sectionIndex]; -+ final int sectionY = sectionIndex + this.minSection; -+ if (valueBoxed == null) { -+ continue; -+ } -+ -+ final boolean empty = valueBoxed.booleanValue(); -+ -+ if (empty) { -+ continue; -+ } -+ -+ for (int dz = -1; dz <= 1; ++dz) { -+ for (int dx = -1; dx <= 1; ++dx) { -+ // if we're not empty, we also need to initialise nibbles -+ // note: if we're unlit, we absolutely do not want to extrude, as light data isn't set up -+ final boolean extrude = (dx | dz) != 0 || !unlit; -+ for (int dy = 1; dy >= -1; --dy) { -+ this.initNibble(dx + chunkX, dy + sectionY, dz + chunkZ, extrude, false); -+ } -+ } -+ } -+ } -+ -+ // check for de-init and lazy-init -+ // lazy init is when chunks are being lit, so at the time they weren't loaded when their neighbours were running -+ // init checks. -+ for (int dz = -1; dz <= 1; ++dz) { -+ for (int dx = -1; dx <= 1; ++dx) { -+ // does this neighbour have 1 radius loaded? -+ boolean neighboursLoaded = true; -+ neighbour_loaded_search: -+ for (int dz2 = -1; dz2 <= 1; ++dz2) { -+ for (int dx2 = -1; dx2 <= 1; ++dx2) { -+ if (this.getEmptinessMap(dx + dx2 + chunkX, dz + dz2 + chunkZ) == null) { -+ neighboursLoaded = false; -+ break neighbour_loaded_search; -+ } -+ } -+ } -+ -+ for (int sectionY = this.maxLightSection; sectionY >= this.minLightSection; --sectionY) { -+ // check neighbours to see if we need to de-init this one -+ boolean allEmpty = true; -+ neighbour_search: -+ for (int dy2 = -1; dy2 <= 1; ++dy2) { -+ for (int dz2 = -1; dz2 <= 1; ++dz2) { -+ for (int dx2 = -1; dx2 <= 1; ++dx2) { -+ final int y = sectionY + dy2; -+ if (y < this.minSection || y > this.maxSection) { -+ // empty -+ continue; -+ } -+ final boolean[] emptinessMap = this.getEmptinessMap(dx + dx2 + chunkX, dz + dz2 + chunkZ); -+ if (emptinessMap != null) { -+ if (!emptinessMap[y - this.minSection]) { -+ allEmpty = false; -+ break neighbour_search; -+ } -+ } else { -+ final LevelChunkSection section = this.getChunkSection(dx + dx2 + chunkX, y, dz + dz2 + chunkZ); -+ if (section != null && !section.hasOnlyAir()) { -+ allEmpty = false; -+ break neighbour_search; -+ } -+ } -+ } -+ } -+ } -+ -+ if (allEmpty & neighboursLoaded) { -+ // can only de-init when neighbours are loaded -+ // de-init is fine to delay, as de-init is just an optimisation - it's not required for lighting -+ // to be correct -+ -+ // all were empty, so de-init -+ this.setNibbleNull(dx + chunkX, sectionY, dz + chunkZ); -+ } else if (!allEmpty) { -+ // must init -+ final boolean extrude = (dx | dz) != 0 || !unlit; -+ this.initNibble(dx + chunkX, sectionY, dz + chunkZ, extrude, false); -+ } -+ } -+ } -+ } -+ -+ return ret; -+ } -+ -+ public final void checkChunkEdges(final LightChunkGetter lightAccess, final int chunkX, final int chunkZ) { -+ this.setupCaches(lightAccess, chunkX * 16 + 7, 128, chunkZ * 16 + 7, true, false); -+ try { -+ final ChunkAccess chunk = this.getChunkInCache(chunkX, chunkZ); -+ if (chunk == null) { -+ return; -+ } -+ this.checkChunkEdges(lightAccess, chunk, this.minLightSection, this.maxLightSection); -+ this.updateVisible(lightAccess); -+ } finally { -+ this.destroyCaches(); -+ } -+ } -+ -+ public final void checkChunkEdges(final LightChunkGetter lightAccess, final int chunkX, final int chunkZ, final ShortCollection sections) { -+ this.setupCaches(lightAccess, chunkX * 16 + 7, 128, chunkZ * 16 + 7, true, false); -+ try { -+ final ChunkAccess chunk = this.getChunkInCache(chunkX, chunkZ); -+ if (chunk == null) { -+ return; -+ } -+ this.checkChunkEdges(lightAccess, chunk, sections); -+ this.updateVisible(lightAccess); -+ } finally { -+ this.destroyCaches(); -+ } -+ } -+ -+ // subclasses should not initialise caches, as this will always be done by the super call -+ // subclasses should not invoke updateVisible, as this will always be done by the super call -+ // needsEdgeChecks applies when possibly loading vanilla data, which means we need to validate the current -+ // chunks light values with respect to neighbours -+ // subclasses should note that the emptiness changes are propagated BEFORE this is called, so this function -+ // does not need to detect empty chunks itself (and it should do no handling for them either!) -+ protected abstract void lightChunk(final LightChunkGetter lightAccess, final ChunkAccess chunk, final boolean needsEdgeChecks); -+ -+ public final void light(final LightChunkGetter lightAccess, final ChunkAccess chunk, final Boolean[] emptySections) { -+ final int chunkX = chunk.getPos().x; -+ final int chunkZ = chunk.getPos().z; -+ this.setupCaches(lightAccess, chunkX * 16 + 7, 128, chunkZ * 16 + 7, true, true); -+ -+ try { -+ final SWMRNibbleArray[] nibbles = getFilledEmptyLight(this.maxLightSection - this.minLightSection + 1); -+ // force current chunk into cache -+ this.setChunkInCache(chunkX, chunkZ, chunk); -+ this.setBlocksForChunkInCache(chunkX, chunkZ, chunk.getSections()); -+ this.setNibblesForChunkInCache(chunkX, chunkZ, nibbles); -+ this.setEmptinessMapCache(chunkX, chunkZ, this.getEmptinessMap(chunk)); -+ -+ final boolean[] ret = this.handleEmptySectionChanges(lightAccess, chunk, emptySections, true); -+ if (ret != null) { -+ this.setEmptinessMap(chunk, ret); -+ } -+ this.lightChunk(lightAccess, chunk, true); -+ this.setNibbles(chunk, nibbles); -+ this.updateVisible(lightAccess); -+ } finally { -+ this.destroyCaches(); -+ } -+ } -+ -+ public final void relightChunks(final LightChunkGetter lightAccess, final Set chunks, -+ final Consumer chunkLightCallback, final IntConsumer onComplete) { -+ // it's recommended for maximum performance that the set is ordered according to a BFS from the center of -+ // the region of chunks to relight -+ // it's required that tickets are added for each chunk to keep them loaded -+ final Long2ObjectOpenHashMap nibblesByChunk = new Long2ObjectOpenHashMap<>(); -+ final Long2ObjectOpenHashMap emptinessMapByChunk = new Long2ObjectOpenHashMap<>(); -+ -+ final int[] neighbourLightOrder = new int[] { -+ // d = 0 -+ 0, 0, -+ // d = 1 -+ -1, 0, -+ 0, -1, -+ 1, 0, -+ 0, 1, -+ // d = 2 -+ -1, 1, -+ 1, 1, -+ -1, -1, -+ 1, -1, -+ }; -+ -+ int lightCalls = 0; -+ -+ for (final ChunkPos chunkPos : chunks) { -+ final int chunkX = chunkPos.x; -+ final int chunkZ = chunkPos.z; -+ final ChunkAccess chunk = (ChunkAccess)lightAccess.getChunkForLighting(chunkX, chunkZ); -+ if (chunk == null || !this.canUseChunk(chunk)) { -+ throw new IllegalStateException(); -+ } -+ -+ for (int i = 0, len = neighbourLightOrder.length; i < len; i += 2) { -+ final int dx = neighbourLightOrder[i]; -+ final int dz = neighbourLightOrder[i + 1]; -+ final int neighbourX = dx + chunkX; -+ final int neighbourZ = dz + chunkZ; -+ -+ final ChunkAccess neighbour = (ChunkAccess)lightAccess.getChunkForLighting(neighbourX, neighbourZ); -+ if (neighbour == null || !this.canUseChunk(neighbour)) { -+ continue; -+ } -+ -+ if (nibblesByChunk.get(CoordinateUtils.getChunkKey(neighbourX, neighbourZ)) != null) { -+ // lit already called for neighbour, no need to light it now -+ continue; -+ } -+ -+ // light neighbour chunk -+ this.setupEncodeOffset(neighbourX * 16 + 7, 128, neighbourZ * 16 + 7); -+ try { -+ // insert all neighbouring chunks for this neighbour that we have data for -+ for (int dz2 = -1; dz2 <= 1; ++dz2) { -+ for (int dx2 = -1; dx2 <= 1; ++dx2) { -+ final int neighbourX2 = neighbourX + dx2; -+ final int neighbourZ2 = neighbourZ + dz2; -+ final long key = CoordinateUtils.getChunkKey(neighbourX2, neighbourZ2); -+ final ChunkAccess neighbour2 = (ChunkAccess)lightAccess.getChunkForLighting(neighbourX2, neighbourZ2); -+ if (neighbour2 == null || !this.canUseChunk(neighbour2)) { -+ continue; -+ } -+ -+ final SWMRNibbleArray[] nibbles = nibblesByChunk.get(key); -+ if (nibbles == null) { -+ // we haven't lit this chunk -+ continue; -+ } -+ -+ this.setChunkInCache(neighbourX2, neighbourZ2, neighbour2); -+ this.setBlocksForChunkInCache(neighbourX2, neighbourZ2, neighbour2.getSections()); -+ this.setNibblesForChunkInCache(neighbourX2, neighbourZ2, nibbles); -+ this.setEmptinessMapCache(neighbourX2, neighbourZ2, emptinessMapByChunk.get(key)); -+ } -+ } -+ -+ final long key = CoordinateUtils.getChunkKey(neighbourX, neighbourZ); -+ -+ // now insert the neighbour chunk and light it -+ final SWMRNibbleArray[] nibbles = getFilledEmptyLight(this.world); -+ nibblesByChunk.put(key, nibbles); -+ -+ this.setChunkInCache(neighbourX, neighbourZ, neighbour); -+ this.setBlocksForChunkInCache(neighbourX, neighbourZ, neighbour.getSections()); -+ this.setNibblesForChunkInCache(neighbourX, neighbourZ, nibbles); -+ -+ final boolean[] neighbourEmptiness = this.handleEmptySectionChanges(lightAccess, neighbour, getEmptySectionsForChunk(neighbour), true); -+ emptinessMapByChunk.put(key, neighbourEmptiness); -+ if (chunks.contains(new ChunkPos(neighbourX, neighbourZ))) { -+ this.setEmptinessMap(neighbour, neighbourEmptiness); -+ } -+ -+ this.lightChunk(lightAccess, neighbour, false); -+ } finally { -+ this.destroyCaches(); -+ } -+ } -+ -+ // done lighting all neighbours, so the chunk is now fully lit -+ -+ // make sure nibbles are fully updated before calling back -+ final SWMRNibbleArray[] nibbles = nibblesByChunk.get(CoordinateUtils.getChunkKey(chunkX, chunkZ)); -+ for (final SWMRNibbleArray nibble : nibbles) { -+ nibble.updateVisible(); -+ } -+ -+ this.setNibbles(chunk, nibbles); -+ -+ for (int y = this.minLightSection; y <= this.maxLightSection; ++y) { -+ lightAccess.onLightUpdate(this.skylightPropagator ? LightLayer.SKY : LightLayer.BLOCK, SectionPos.of(chunkX, y, chunkX)); -+ } -+ -+ // now do callback -+ if (chunkLightCallback != null) { -+ chunkLightCallback.accept(chunkPos); -+ } -+ ++lightCalls; -+ } -+ -+ if (onComplete != null) { -+ onComplete.accept(lightCalls); -+ } -+ } -+ -+ // contains: -+ // lower (6 + 6 + 16) = 28 bits: encoded coordinate position (x | (z << 6) | (y << (6 + 6)))) -+ // next 4 bits: propagated light level (0, 15] -+ // next 6 bits: propagation direction bitset -+ // next 24 bits: unused -+ // last 3 bits: state flags -+ // state flags: -+ // whether the increase propagator needs to write the propagated level to the position, used to avoid cascading light -+ // updates for block sources -+ protected static final long FLAG_WRITE_LEVEL = Long.MIN_VALUE >>> 2; -+ // whether the propagation needs to check if its current level is equal to the expected level -+ // used only in increase propagation -+ protected static final long FLAG_RECHECK_LEVEL = Long.MIN_VALUE >>> 1; -+ // whether the propagation needs to consider if its block is conditionally transparent -+ protected static final long FLAG_HAS_SIDED_TRANSPARENT_BLOCKS = Long.MIN_VALUE; -+ -+ protected long[] increaseQueue = new long[16 * 16 * 16]; -+ protected int increaseQueueInitialLength; -+ protected long[] decreaseQueue = new long[16 * 16 * 16]; -+ protected int decreaseQueueInitialLength; -+ -+ protected final long[] resizeIncreaseQueue() { -+ return this.increaseQueue = Arrays.copyOf(this.increaseQueue, this.increaseQueue.length * 2); -+ } -+ -+ protected final long[] resizeDecreaseQueue() { -+ return this.decreaseQueue = Arrays.copyOf(this.decreaseQueue, this.decreaseQueue.length * 2); -+ } -+ -+ protected final void appendToIncreaseQueue(final long value) { -+ final int idx = this.increaseQueueInitialLength++; -+ long[] queue = this.increaseQueue; -+ if (idx >= queue.length) { -+ queue = this.resizeIncreaseQueue(); -+ queue[idx] = value; -+ } else { -+ queue[idx] = value; -+ } -+ } -+ -+ protected final void appendToDecreaseQueue(final long value) { -+ final int idx = this.decreaseQueueInitialLength++; -+ long[] queue = this.decreaseQueue; -+ if (idx >= queue.length) { -+ queue = this.resizeDecreaseQueue(); -+ queue[idx] = value; -+ } else { -+ queue[idx] = value; -+ } -+ } -+ -+ protected static final AxisDirection[][] OLD_CHECK_DIRECTIONS = new AxisDirection[1 << 6][]; -+ protected static final int ALL_DIRECTIONS_BITSET = (1 << 6) - 1; -+ static { -+ for (int i = 0; i < OLD_CHECK_DIRECTIONS.length; ++i) { -+ final List directions = new ArrayList<>(); -+ for (int bitset = i, len = Integer.bitCount(i), index = 0; index < len; ++index, bitset ^= IntegerUtil.getTrailingBit(bitset)) { -+ directions.add(AXIS_DIRECTIONS[IntegerUtil.trailingZeros(bitset)]); -+ } -+ OLD_CHECK_DIRECTIONS[i] = directions.toArray(new AxisDirection[0]); -+ } -+ } -+ -+ protected final void performLightIncrease(final LightChunkGetter lightAccess) { -+ final BlockGetter world = lightAccess.getLevel(); -+ long[] queue = this.increaseQueue; -+ int queueReadIndex = 0; -+ int queueLength = this.increaseQueueInitialLength; -+ this.increaseQueueInitialLength = 0; -+ final int decodeOffsetX = -this.encodeOffsetX; -+ final int decodeOffsetY = -this.encodeOffsetY; -+ final int decodeOffsetZ = -this.encodeOffsetZ; -+ final int encodeOffset = this.coordinateOffset; -+ final int sectionOffset = this.chunkSectionIndexOffset; -+ -+ while (queueReadIndex < queueLength) { -+ final long queueValue = queue[queueReadIndex++]; -+ -+ final int posX = ((int)queueValue & 63) + decodeOffsetX; -+ final int posZ = (((int)queueValue >>> 6) & 63) + decodeOffsetZ; -+ final int posY = (((int)queueValue >>> 12) & ((1 << 16) - 1)) + decodeOffsetY; -+ final int propagatedLightLevel = (int)((queueValue >>> (6 + 6 + 16)) & 0xFL); -+ final AxisDirection[] checkDirections = OLD_CHECK_DIRECTIONS[(int)((queueValue >>> (6 + 6 + 16 + 4)) & 63L)]; -+ -+ if ((queueValue & FLAG_RECHECK_LEVEL) != 0L) { -+ if (this.getLightLevel(posX, posY, posZ) != propagatedLightLevel) { -+ // not at the level we expect, so something changed. -+ continue; -+ } -+ } else if ((queueValue & FLAG_WRITE_LEVEL) != 0L) { -+ // these are used to restore block sources after a propagation decrease -+ this.setLightLevel(posX, posY, posZ, propagatedLightLevel); -+ } -+ -+ if ((queueValue & FLAG_HAS_SIDED_TRANSPARENT_BLOCKS) == 0L) { -+ // we don't need to worry about our state here. -+ for (final AxisDirection propagate : checkDirections) { -+ final int offX = posX + propagate.x; -+ final int offY = posY + propagate.y; -+ final int offZ = posZ + propagate.z; -+ -+ final int sectionIndex = (offX >> 4) + 5 * (offZ >> 4) + (5 * 5) * (offY >> 4) + sectionOffset; -+ final int localIndex = (offX & 15) | ((offZ & 15) << 4) | ((offY & 15) << 8); -+ -+ final SWMRNibbleArray currentNibble = this.nibbleCache[sectionIndex]; -+ final int currentLevel; -+ if (currentNibble == null || (currentLevel = currentNibble.getUpdating(localIndex)) >= (propagatedLightLevel - 1)) { -+ continue; // already at the level we want or unloaded -+ } -+ -+ final BlockState blockState = this.getBlockState(sectionIndex, localIndex); -+ if (blockState == null) { -+ continue; -+ } -+ final int opacityCached = blockState.getOpacityIfCached(); -+ if (opacityCached != -1) { -+ final int targetLevel = propagatedLightLevel - Math.max(1, opacityCached); -+ if (targetLevel > currentLevel) { -+ currentNibble.set(localIndex, targetLevel); -+ this.postLightUpdate(offX, offY, offZ); -+ -+ if (targetLevel > 1) { -+ if (queueLength >= queue.length) { -+ queue = this.resizeIncreaseQueue(); -+ } -+ queue[queueLength++] = -+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | ((targetLevel & 0xFL) << (6 + 6 + 16)) -+ | (propagate.everythingButTheOppositeDirection << (6 + 6 + 16 + 4)); -+ continue; -+ } -+ } -+ continue; -+ } else { -+ this.mutablePos1.set(offX, offY, offZ); -+ long flags = 0; -+ if (blockState.isConditionallyFullOpaque()) { -+ final VoxelShape cullingFace = blockState.getFaceOcclusionShape(world, this.mutablePos1, propagate.getOpposite().nms); -+ -+ if (Shapes.faceShapeOccludes(Shapes.empty(), cullingFace)) { -+ continue; -+ } -+ flags |= FLAG_HAS_SIDED_TRANSPARENT_BLOCKS; -+ } -+ -+ final int opacity = blockState.getLightBlock(world, this.mutablePos1); -+ final int targetLevel = propagatedLightLevel - Math.max(1, opacity); -+ if (targetLevel <= currentLevel) { -+ continue; -+ } -+ -+ currentNibble.set(localIndex, targetLevel); -+ this.postLightUpdate(offX, offY, offZ); -+ -+ if (targetLevel > 1) { -+ if (queueLength >= queue.length) { -+ queue = this.resizeIncreaseQueue(); -+ } -+ queue[queueLength++] = -+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | ((targetLevel & 0xFL) << (6 + 6 + 16)) -+ | (propagate.everythingButTheOppositeDirection << (6 + 6 + 16 + 4)) -+ | (flags); -+ } -+ continue; -+ } -+ } -+ } else { -+ // we actually need to worry about our state here -+ final BlockState fromBlock = this.getBlockState(posX, posY, posZ); -+ this.mutablePos2.set(posX, posY, posZ); -+ for (final AxisDirection propagate : checkDirections) { -+ final int offX = posX + propagate.x; -+ final int offY = posY + propagate.y; -+ final int offZ = posZ + propagate.z; -+ -+ final VoxelShape fromShape = fromBlock.isConditionallyFullOpaque() ? fromBlock.getFaceOcclusionShape(world, this.mutablePos2, propagate.nms) : Shapes.empty(); -+ -+ if (fromShape != Shapes.empty() && Shapes.faceShapeOccludes(Shapes.empty(), fromShape)) { -+ continue; -+ } -+ -+ final int sectionIndex = (offX >> 4) + 5 * (offZ >> 4) + (5 * 5) * (offY >> 4) + sectionOffset; -+ final int localIndex = (offX & 15) | ((offZ & 15) << 4) | ((offY & 15) << 8); -+ -+ final SWMRNibbleArray currentNibble = this.nibbleCache[sectionIndex]; -+ final int currentLevel; -+ -+ if (currentNibble == null || (currentLevel = currentNibble.getUpdating(localIndex)) >= (propagatedLightLevel - 1)) { -+ continue; // already at the level we want -+ } -+ -+ final BlockState blockState = this.getBlockState(sectionIndex, localIndex); -+ if (blockState == null) { -+ continue; -+ } -+ final int opacityCached = blockState.getOpacityIfCached(); -+ if (opacityCached != -1) { -+ final int targetLevel = propagatedLightLevel - Math.max(1, opacityCached); -+ if (targetLevel > currentLevel) { -+ currentNibble.set(localIndex, targetLevel); -+ this.postLightUpdate(offX, offY, offZ); -+ -+ if (targetLevel > 1) { -+ if (queueLength >= queue.length) { -+ queue = this.resizeIncreaseQueue(); -+ } -+ queue[queueLength++] = -+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | ((targetLevel & 0xFL) << (6 + 6 + 16)) -+ | (propagate.everythingButTheOppositeDirection << (6 + 6 + 16 + 4)); -+ continue; -+ } -+ } -+ continue; -+ } else { -+ this.mutablePos1.set(offX, offY, offZ); -+ long flags = 0; -+ if (blockState.isConditionallyFullOpaque()) { -+ final VoxelShape cullingFace = blockState.getFaceOcclusionShape(world, this.mutablePos1, propagate.getOpposite().nms); -+ -+ if (Shapes.faceShapeOccludes(fromShape, cullingFace)) { -+ continue; -+ } -+ flags |= FLAG_HAS_SIDED_TRANSPARENT_BLOCKS; -+ } -+ -+ final int opacity = blockState.getLightBlock(world, this.mutablePos1); -+ final int targetLevel = propagatedLightLevel - Math.max(1, opacity); -+ if (targetLevel <= currentLevel) { -+ continue; -+ } -+ -+ currentNibble.set(localIndex, targetLevel); -+ this.postLightUpdate(offX, offY, offZ); -+ -+ if (targetLevel > 1) { -+ if (queueLength >= queue.length) { -+ queue = this.resizeIncreaseQueue(); -+ } -+ queue[queueLength++] = -+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | ((targetLevel & 0xFL) << (6 + 6 + 16)) -+ | (propagate.everythingButTheOppositeDirection << (6 + 6 + 16 + 4)) -+ | (flags); -+ } -+ continue; -+ } -+ } -+ } -+ } -+ } -+ -+ protected final void performLightDecrease(final LightChunkGetter lightAccess) { -+ final BlockGetter world = lightAccess.getLevel(); -+ long[] queue = this.decreaseQueue; -+ long[] increaseQueue = this.increaseQueue; -+ int queueReadIndex = 0; -+ int queueLength = this.decreaseQueueInitialLength; -+ this.decreaseQueueInitialLength = 0; -+ int increaseQueueLength = this.increaseQueueInitialLength; -+ final int decodeOffsetX = -this.encodeOffsetX; -+ final int decodeOffsetY = -this.encodeOffsetY; -+ final int decodeOffsetZ = -this.encodeOffsetZ; -+ final int encodeOffset = this.coordinateOffset; -+ final int sectionOffset = this.chunkSectionIndexOffset; -+ final int emittedMask = this.emittedLightMask; -+ -+ while (queueReadIndex < queueLength) { -+ final long queueValue = queue[queueReadIndex++]; -+ -+ final int posX = ((int)queueValue & 63) + decodeOffsetX; -+ final int posZ = (((int)queueValue >>> 6) & 63) + decodeOffsetZ; -+ final int posY = (((int)queueValue >>> 12) & ((1 << 16) - 1)) + decodeOffsetY; -+ final int propagatedLightLevel = (int)((queueValue >>> (6 + 6 + 16)) & 0xF); -+ final AxisDirection[] checkDirections = OLD_CHECK_DIRECTIONS[(int)((queueValue >>> (6 + 6 + 16 + 4)) & 63)]; -+ -+ if ((queueValue & FLAG_HAS_SIDED_TRANSPARENT_BLOCKS) == 0L) { -+ // we don't need to worry about our state here. -+ for (final AxisDirection propagate : checkDirections) { -+ final int offX = posX + propagate.x; -+ final int offY = posY + propagate.y; -+ final int offZ = posZ + propagate.z; -+ -+ final int sectionIndex = (offX >> 4) + 5 * (offZ >> 4) + (5 * 5) * (offY >> 4) + sectionOffset; -+ final int localIndex = (offX & 15) | ((offZ & 15) << 4) | ((offY & 15) << 8); -+ -+ final SWMRNibbleArray currentNibble = this.nibbleCache[sectionIndex]; -+ final int lightLevel; -+ -+ if (currentNibble == null || (lightLevel = currentNibble.getUpdating(localIndex)) == 0) { -+ // already at lowest (or unloaded), nothing we can do -+ continue; -+ } -+ -+ final BlockState blockState = this.getBlockState(sectionIndex, localIndex); -+ if (blockState == null) { -+ continue; -+ } -+ final int opacityCached = blockState.getOpacityIfCached(); -+ if (opacityCached != -1) { -+ final int targetLevel = Math.max(0, propagatedLightLevel - Math.max(1, opacityCached)); -+ if (lightLevel > targetLevel) { -+ // it looks like another source propagated here, so re-propagate it -+ if (increaseQueueLength >= increaseQueue.length) { -+ increaseQueue = this.resizeIncreaseQueue(); -+ } -+ increaseQueue[increaseQueueLength++] = -+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | ((lightLevel & 0xFL) << (6 + 6 + 16)) -+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4)) -+ | FLAG_RECHECK_LEVEL; -+ continue; -+ } -+ final int emittedLight = blockState.getLightEmission() & emittedMask; -+ if (emittedLight != 0) { -+ // re-propagate source -+ // note: do not set recheck level, or else the propagation will fail -+ if (increaseQueueLength >= increaseQueue.length) { -+ increaseQueue = this.resizeIncreaseQueue(); -+ } -+ increaseQueue[increaseQueueLength++] = -+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | ((emittedLight & 0xFL) << (6 + 6 + 16)) -+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4)) -+ | (blockState.isConditionallyFullOpaque() ? (FLAG_WRITE_LEVEL | FLAG_HAS_SIDED_TRANSPARENT_BLOCKS) : FLAG_WRITE_LEVEL); -+ } -+ -+ currentNibble.set(localIndex, 0); -+ this.postLightUpdate(offX, offY, offZ); -+ -+ if (targetLevel > 0) { // we actually need to propagate 0 just in case we find a neighbour... -+ if (queueLength >= queue.length) { -+ queue = this.resizeDecreaseQueue(); -+ } -+ queue[queueLength++] = -+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | ((targetLevel & 0xFL) << (6 + 6 + 16)) -+ | ((propagate.everythingButTheOppositeDirection) << (6 + 6 + 16 + 4)); -+ continue; -+ } -+ continue; -+ } else { -+ this.mutablePos1.set(offX, offY, offZ); -+ long flags = 0; -+ if (blockState.isConditionallyFullOpaque()) { -+ final VoxelShape cullingFace = blockState.getFaceOcclusionShape(world, this.mutablePos1, propagate.getOpposite().nms); -+ -+ if (Shapes.faceShapeOccludes(Shapes.empty(), cullingFace)) { -+ continue; -+ } -+ flags |= FLAG_HAS_SIDED_TRANSPARENT_BLOCKS; -+ } -+ -+ final int opacity = blockState.getLightBlock(world, this.mutablePos1); -+ final int targetLevel = Math.max(0, propagatedLightLevel - Math.max(1, opacity)); -+ if (lightLevel > targetLevel) { -+ // it looks like another source propagated here, so re-propagate it -+ if (increaseQueueLength >= increaseQueue.length) { -+ increaseQueue = this.resizeIncreaseQueue(); -+ } -+ increaseQueue[increaseQueueLength++] = -+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | ((lightLevel & 0xFL) << (6 + 6 + 16)) -+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4)) -+ | (FLAG_RECHECK_LEVEL | flags); -+ continue; -+ } -+ final int emittedLight = blockState.getLightEmission() & emittedMask; -+ if (emittedLight != 0) { -+ // re-propagate source -+ // note: do not set recheck level, or else the propagation will fail -+ if (increaseQueueLength >= increaseQueue.length) { -+ increaseQueue = this.resizeIncreaseQueue(); -+ } -+ increaseQueue[increaseQueueLength++] = -+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | ((emittedLight & 0xFL) << (6 + 6 + 16)) -+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4)) -+ | (flags | FLAG_WRITE_LEVEL); -+ } -+ -+ currentNibble.set(localIndex, 0); -+ this.postLightUpdate(offX, offY, offZ); -+ -+ if (targetLevel > 0) { -+ if (queueLength >= queue.length) { -+ queue = this.resizeDecreaseQueue(); -+ } -+ queue[queueLength++] = -+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | ((targetLevel & 0xFL) << (6 + 6 + 16)) -+ | ((propagate.everythingButTheOppositeDirection) << (6 + 6 + 16 + 4)) -+ | flags; -+ } -+ continue; -+ } -+ } -+ } else { -+ // we actually need to worry about our state here -+ final BlockState fromBlock = this.getBlockState(posX, posY, posZ); -+ this.mutablePos2.set(posX, posY, posZ); -+ for (final AxisDirection propagate : checkDirections) { -+ final int offX = posX + propagate.x; -+ final int offY = posY + propagate.y; -+ final int offZ = posZ + propagate.z; -+ -+ final int sectionIndex = (offX >> 4) + 5 * (offZ >> 4) + (5 * 5) * (offY >> 4) + sectionOffset; -+ final int localIndex = (offX & 15) | ((offZ & 15) << 4) | ((offY & 15) << 8); -+ -+ final VoxelShape fromShape = (fromBlock.isConditionallyFullOpaque()) ? fromBlock.getFaceOcclusionShape(world, this.mutablePos2, propagate.nms) : Shapes.empty(); -+ -+ if (fromShape != Shapes.empty() && Shapes.faceShapeOccludes(Shapes.empty(), fromShape)) { -+ continue; -+ } -+ -+ final SWMRNibbleArray currentNibble = this.nibbleCache[sectionIndex]; -+ final int lightLevel; -+ -+ if (currentNibble == null || (lightLevel = currentNibble.getUpdating(localIndex)) == 0) { -+ // already at lowest (or unloaded), nothing we can do -+ continue; -+ } -+ -+ final BlockState blockState = this.getBlockState(sectionIndex, localIndex); -+ if (blockState == null) { -+ continue; -+ } -+ final int opacityCached = blockState.getOpacityIfCached(); -+ if (opacityCached != -1) { -+ final int targetLevel = Math.max(0, propagatedLightLevel - Math.max(1, opacityCached)); -+ if (lightLevel > targetLevel) { -+ // it looks like another source propagated here, so re-propagate it -+ if (increaseQueueLength >= increaseQueue.length) { -+ increaseQueue = this.resizeIncreaseQueue(); -+ } -+ increaseQueue[increaseQueueLength++] = -+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | ((lightLevel & 0xFL) << (6 + 6 + 16)) -+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4)) -+ | FLAG_RECHECK_LEVEL; -+ continue; -+ } -+ final int emittedLight = blockState.getLightEmission() & emittedMask; -+ if (emittedLight != 0) { -+ // re-propagate source -+ // note: do not set recheck level, or else the propagation will fail -+ if (increaseQueueLength >= increaseQueue.length) { -+ increaseQueue = this.resizeIncreaseQueue(); -+ } -+ increaseQueue[increaseQueueLength++] = -+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | ((emittedLight & 0xFL) << (6 + 6 + 16)) -+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4)) -+ | (blockState.isConditionallyFullOpaque() ? (FLAG_WRITE_LEVEL | FLAG_HAS_SIDED_TRANSPARENT_BLOCKS) : FLAG_WRITE_LEVEL); -+ } -+ -+ currentNibble.set(localIndex, 0); -+ this.postLightUpdate(offX, offY, offZ); -+ -+ if (targetLevel > 0) { // we actually need to propagate 0 just in case we find a neighbour... -+ if (queueLength >= queue.length) { -+ queue = this.resizeDecreaseQueue(); -+ } -+ queue[queueLength++] = -+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | ((targetLevel & 0xFL) << (6 + 6 + 16)) -+ | ((propagate.everythingButTheOppositeDirection) << (6 + 6 + 16 + 4)); -+ continue; -+ } -+ continue; -+ } else { -+ this.mutablePos1.set(offX, offY, offZ); -+ long flags = 0; -+ if (blockState.isConditionallyFullOpaque()) { -+ final VoxelShape cullingFace = blockState.getFaceOcclusionShape(world, this.mutablePos1, propagate.getOpposite().nms); -+ -+ if (Shapes.faceShapeOccludes(fromShape, cullingFace)) { -+ continue; -+ } -+ flags |= FLAG_HAS_SIDED_TRANSPARENT_BLOCKS; -+ } -+ -+ final int opacity = blockState.getLightBlock(world, this.mutablePos1); -+ final int targetLevel = Math.max(0, propagatedLightLevel - Math.max(1, opacity)); -+ if (lightLevel > targetLevel) { -+ // it looks like another source propagated here, so re-propagate it -+ if (increaseQueueLength >= increaseQueue.length) { -+ increaseQueue = this.resizeIncreaseQueue(); -+ } -+ increaseQueue[increaseQueueLength++] = -+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | ((lightLevel & 0xFL) << (6 + 6 + 16)) -+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4)) -+ | (FLAG_RECHECK_LEVEL | flags); -+ continue; -+ } -+ final int emittedLight = blockState.getLightEmission() & emittedMask; -+ if (emittedLight != 0) { -+ // re-propagate source -+ // note: do not set recheck level, or else the propagation will fail -+ if (increaseQueueLength >= increaseQueue.length) { -+ increaseQueue = this.resizeIncreaseQueue(); -+ } -+ increaseQueue[increaseQueueLength++] = -+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | ((emittedLight & 0xFL) << (6 + 6 + 16)) -+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4)) -+ | (flags | FLAG_WRITE_LEVEL); -+ } -+ -+ currentNibble.set(localIndex, 0); -+ this.postLightUpdate(offX, offY, offZ); -+ -+ if (targetLevel > 0) { // we actually need to propagate 0 just in case we find a neighbour... -+ if (queueLength >= queue.length) { -+ queue = this.resizeDecreaseQueue(); -+ } -+ queue[queueLength++] = -+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1)) -+ | ((targetLevel & 0xFL) << (6 + 6 + 16)) -+ | ((propagate.everythingButTheOppositeDirection) << (6 + 6 + 16 + 4)) -+ | flags; -+ } -+ continue; -+ } -+ } -+ } -+ } -+ -+ // propagate sources we clobbered -+ this.increaseQueueInitialLength = increaseQueueLength; -+ this.performLightIncrease(lightAccess); -+ } -+} -diff --git a/src/main/java/ca/spottedleaf/starlight/common/light/StarLightInterface.java b/src/main/java/ca/spottedleaf/starlight/common/light/StarLightInterface.java -new file mode 100644 -index 0000000000000000000000000000000000000000..e0338db4d6fa359029ed5edeacc3646aa98701f5 ---- /dev/null -+++ b/src/main/java/ca/spottedleaf/starlight/common/light/StarLightInterface.java -@@ -0,0 +1,674 @@ -+package ca.spottedleaf.starlight.common.light; -+ -+import ca.spottedleaf.starlight.common.util.CoordinateUtils; -+import ca.spottedleaf.starlight.common.util.WorldUtil; -+import it.unimi.dsi.fastutil.longs.Long2ObjectLinkedOpenHashMap; -+import it.unimi.dsi.fastutil.shorts.ShortCollection; -+import it.unimi.dsi.fastutil.shorts.ShortOpenHashSet; -+import it.unimi.dsi.fastutil.objects.ObjectOpenHashSet; -+import net.minecraft.core.BlockPos; -+import net.minecraft.core.SectionPos; -+import net.minecraft.server.level.ServerChunkCache; -+import net.minecraft.server.level.ServerLevel; -+import net.minecraft.server.level.TicketType; -+import net.minecraft.world.level.ChunkPos; -+import net.minecraft.world.level.Level; -+import net.minecraft.world.level.chunk.ChunkAccess; -+import net.minecraft.world.level.chunk.status.ChunkStatus; -+import net.minecraft.world.level.chunk.DataLayer; -+import net.minecraft.world.level.chunk.LevelChunk; -+import net.minecraft.world.level.chunk.LightChunkGetter; -+import net.minecraft.world.level.lighting.LayerLightEventListener; -+import net.minecraft.world.level.lighting.LevelLightEngine; -+import java.util.ArrayDeque; -+import java.util.ArrayList; -+import java.util.List; -+import java.util.Set; -+import java.util.concurrent.CompletableFuture; -+import java.util.function.Consumer; -+import java.util.function.IntConsumer; -+ -+public final class StarLightInterface { -+ -+ public static final TicketType CHUNK_WORK_TICKET = TicketType.create("starlight_chunk_work_ticket", (p1, p2) -> Long.compare(p1.toLong(), p2.toLong())); -+ -+ /** -+ * Can be {@code null}, indicating the light is all empty. -+ */ -+ protected final Level world; -+ protected final LightChunkGetter lightAccess; -+ -+ protected final ArrayDeque cachedSkyPropagators; -+ protected final ArrayDeque cachedBlockPropagators; -+ -+ protected final LightQueue lightQueue = new LightQueue(this); -+ -+ protected final LayerLightEventListener skyReader; -+ protected final LayerLightEventListener blockReader; -+ protected final boolean isClientSide; -+ -+ protected final int minSection; -+ protected final int maxSection; -+ protected final int minLightSection; -+ protected final int maxLightSection; -+ -+ public final LevelLightEngine lightEngine; -+ -+ private final boolean hasBlockLight; -+ private final boolean hasSkyLight; -+ -+ public StarLightInterface(final LightChunkGetter lightAccess, final boolean hasSkyLight, final boolean hasBlockLight, final LevelLightEngine lightEngine) { -+ this.lightAccess = lightAccess; -+ this.world = lightAccess == null ? null : (Level)lightAccess.getLevel(); -+ this.cachedSkyPropagators = hasSkyLight && lightAccess != null ? new ArrayDeque<>() : null; -+ this.cachedBlockPropagators = hasBlockLight && lightAccess != null ? new ArrayDeque<>() : null; -+ this.isClientSide = !(this.world instanceof ServerLevel); -+ if (this.world == null) { -+ this.minSection = -4; -+ this.maxSection = 19; -+ this.minLightSection = -5; -+ this.maxLightSection = 20; -+ } else { -+ this.minSection = WorldUtil.getMinSection(this.world); -+ this.maxSection = WorldUtil.getMaxSection(this.world); -+ this.minLightSection = WorldUtil.getMinLightSection(this.world); -+ this.maxLightSection = WorldUtil.getMaxLightSection(this.world); -+ } -+ this.lightEngine = lightEngine; -+ this.hasBlockLight = hasBlockLight; -+ this.hasSkyLight = hasSkyLight; -+ this.skyReader = !hasSkyLight ? LayerLightEventListener.DummyLightLayerEventListener.INSTANCE : new LayerLightEventListener() { -+ @Override -+ public void checkBlock(final BlockPos blockPos) { -+ StarLightInterface.this.lightEngine.checkBlock(blockPos.immutable()); -+ } -+ -+ @Override -+ public void propagateLightSources(final ChunkPos chunkPos) { -+ throw new UnsupportedOperationException(); -+ } -+ -+ @Override -+ public boolean hasLightWork() { -+ // not really correct... -+ return StarLightInterface.this.hasUpdates(); -+ } -+ -+ @Override -+ public int runLightUpdates() { -+ throw new UnsupportedOperationException(); -+ } -+ -+ @Override -+ public void setLightEnabled(final ChunkPos chunkPos, final boolean bl) { -+ throw new UnsupportedOperationException(); -+ } -+ -+ @Override -+ public DataLayer getDataLayerData(final SectionPos pos) { -+ final ChunkAccess chunk = StarLightInterface.this.getAnyChunkNow(pos.getX(), pos.getZ()); -+ if (chunk == null || (!StarLightInterface.this.isClientSide && !chunk.isLightCorrect()) || !chunk.getStatus().isOrAfter(ChunkStatus.LIGHT)) { -+ return null; -+ } -+ -+ final int sectionY = pos.getY(); -+ -+ if (sectionY > StarLightInterface.this.maxLightSection || sectionY < StarLightInterface.this.minLightSection) { -+ return null; -+ } -+ -+ if (chunk.getSkyEmptinessMap() == null) { -+ return null; -+ } -+ -+ return chunk.getSkyNibbles()[sectionY - StarLightInterface.this.minLightSection].toVanillaNibble(); -+ } -+ -+ @Override -+ public int getLightValue(final BlockPos blockPos) { -+ return StarLightInterface.this.getSkyLightValue(blockPos, StarLightInterface.this.getAnyChunkNow(blockPos.getX() >> 4, blockPos.getZ() >> 4)); -+ } -+ -+ @Override -+ public void updateSectionStatus(final SectionPos pos, final boolean notReady) { -+ StarLightInterface.this.sectionChange(pos, notReady); -+ } -+ }; -+ this.blockReader = !hasBlockLight ? LayerLightEventListener.DummyLightLayerEventListener.INSTANCE : new LayerLightEventListener() { -+ @Override -+ public void checkBlock(final BlockPos blockPos) { -+ StarLightInterface.this.lightEngine.checkBlock(blockPos.immutable()); -+ } -+ -+ @Override -+ public void propagateLightSources(final ChunkPos chunkPos) { -+ throw new UnsupportedOperationException(); -+ } -+ -+ @Override -+ public boolean hasLightWork() { -+ // not really correct... -+ return StarLightInterface.this.hasUpdates(); -+ } -+ -+ @Override -+ public int runLightUpdates() { -+ throw new UnsupportedOperationException(); -+ } -+ -+ @Override -+ public void setLightEnabled(final ChunkPos chunkPos, final boolean bl) { -+ throw new UnsupportedOperationException(); -+ } -+ -+ @Override -+ public DataLayer getDataLayerData(final SectionPos pos) { -+ final ChunkAccess chunk = StarLightInterface.this.getAnyChunkNow(pos.getX(), pos.getZ()); -+ -+ if (chunk == null || pos.getY() < StarLightInterface.this.minLightSection || pos.getY() > StarLightInterface.this.maxLightSection) { -+ return null; -+ } -+ -+ return chunk.getBlockNibbles()[pos.getY() - StarLightInterface.this.minLightSection].toVanillaNibble(); -+ } -+ -+ @Override -+ public int getLightValue(final BlockPos blockPos) { -+ return StarLightInterface.this.getBlockLightValue(blockPos, StarLightInterface.this.getAnyChunkNow(blockPos.getX() >> 4, blockPos.getZ() >> 4)); -+ } -+ -+ @Override -+ public void updateSectionStatus(final SectionPos pos, final boolean notReady) { -+ StarLightInterface.this.sectionChange(pos, notReady); -+ } -+ }; -+ } -+ -+ public boolean hasSkyLight() { -+ return this.hasSkyLight; -+ } -+ -+ public boolean hasBlockLight() { -+ return this.hasBlockLight; -+ } -+ -+ public int getSkyLightValue(final BlockPos blockPos, final ChunkAccess chunk) { -+ if (!this.hasSkyLight) { -+ return 0; -+ } -+ final int x = blockPos.getX(); -+ int y = blockPos.getY(); -+ final int z = blockPos.getZ(); -+ -+ final int minSection = this.minSection; -+ final int maxSection = this.maxSection; -+ final int minLightSection = this.minLightSection; -+ final int maxLightSection = this.maxLightSection; -+ -+ if (chunk == null || (!this.isClientSide && !chunk.isLightCorrect()) || !chunk.getStatus().isOrAfter(ChunkStatus.LIGHT)) { -+ return 15; -+ } -+ -+ int sectionY = y >> 4; -+ -+ if (sectionY > maxLightSection) { -+ return 15; -+ } -+ -+ if (sectionY < minLightSection) { -+ sectionY = minLightSection; -+ y = sectionY << 4; -+ } -+ -+ final SWMRNibbleArray[] nibbles = chunk.getSkyNibbles(); -+ final SWMRNibbleArray immediate = nibbles[sectionY - minLightSection]; -+ -+ if (!immediate.isNullNibbleVisible()) { -+ return immediate.getVisible(x, y, z); -+ } -+ -+ final boolean[] emptinessMap = chunk.getSkyEmptinessMap(); -+ -+ if (emptinessMap == null) { -+ return 15; -+ } -+ -+ // are we above this chunk's lowest empty section? -+ int lowestY = minLightSection - 1; -+ for (int currY = maxSection; currY >= minSection; --currY) { -+ if (emptinessMap[currY - minSection]) { -+ continue; -+ } -+ -+ // should always be full lit here -+ lowestY = currY; -+ break; -+ } -+ -+ if (sectionY > lowestY) { -+ return 15; -+ } -+ -+ // this nibble is going to depend solely on the skylight data above it -+ // find first non-null data above (there does exist one, as we just found it above) -+ for (int currY = sectionY + 1; currY <= maxLightSection; ++currY) { -+ final SWMRNibbleArray nibble = nibbles[currY - minLightSection]; -+ if (!nibble.isNullNibbleVisible()) { -+ return nibble.getVisible(x, 0, z); -+ } -+ } -+ -+ // should never reach here -+ return 15; -+ } -+ -+ public int getBlockLightValue(final BlockPos blockPos, final ChunkAccess chunk) { -+ if (!this.hasBlockLight) { -+ return 0; -+ } -+ final int y = blockPos.getY(); -+ final int cy = y >> 4; -+ -+ final int minLightSection = this.minLightSection; -+ final int maxLightSection = this.maxLightSection; -+ -+ if (cy < minLightSection || cy > maxLightSection) { -+ return 0; -+ } -+ -+ if (chunk == null) { -+ return 0; -+ } -+ -+ final SWMRNibbleArray nibble = chunk.getBlockNibbles()[cy - minLightSection]; -+ return nibble.getVisible(blockPos.getX(), y, blockPos.getZ()); -+ } -+ -+ public int getRawBrightness(final BlockPos pos, final int ambientDarkness) { -+ final ChunkAccess chunk = this.getAnyChunkNow(pos.getX() >> 4, pos.getZ() >> 4); -+ -+ final int sky = this.getSkyLightValue(pos, chunk) - ambientDarkness; -+ // Don't fetch the block light level if the skylight level is 15, since the value will never be higher. -+ if (sky == 15) return 15; -+ final int block = this.getBlockLightValue(pos, chunk); -+ return Math.max(sky, block); -+ } -+ -+ public LayerLightEventListener getSkyReader() { -+ return this.skyReader; -+ } -+ -+ public LayerLightEventListener getBlockReader() { -+ return this.blockReader; -+ } -+ -+ public boolean isClientSide() { -+ return this.isClientSide; -+ } -+ -+ public ChunkAccess getAnyChunkNow(final int chunkX, final int chunkZ) { -+ if (this.world == null) { -+ // empty world -+ return null; -+ } -+ -+ final ServerChunkCache chunkProvider = ((ServerLevel)this.world).getChunkSource(); -+ final LevelChunk fullLoaded = chunkProvider.getChunkAtIfLoadedImmediately(chunkX, chunkZ); -+ if (fullLoaded != null) { -+ return fullLoaded; -+ } -+ -+ return chunkProvider.getChunkAtImmediately(chunkX, chunkZ); -+ } -+ -+ public boolean hasUpdates() { -+ return !this.lightQueue.isEmpty(); -+ } -+ -+ public Level getWorld() { -+ return this.world; -+ } -+ -+ public LightChunkGetter getLightAccess() { -+ return this.lightAccess; -+ } -+ -+ protected final SkyStarLightEngine getSkyLightEngine() { -+ if (this.cachedSkyPropagators == null) { -+ return null; -+ } -+ final SkyStarLightEngine ret; -+ synchronized (this.cachedSkyPropagators) { -+ ret = this.cachedSkyPropagators.pollFirst(); -+ } -+ -+ if (ret == null) { -+ return new SkyStarLightEngine(this.world); -+ } -+ return ret; -+ } -+ -+ protected final void releaseSkyLightEngine(final SkyStarLightEngine engine) { -+ if (this.cachedSkyPropagators == null) { -+ return; -+ } -+ synchronized (this.cachedSkyPropagators) { -+ this.cachedSkyPropagators.addFirst(engine); -+ } -+ } -+ -+ protected final BlockStarLightEngine getBlockLightEngine() { -+ if (this.cachedBlockPropagators == null) { -+ return null; -+ } -+ final BlockStarLightEngine ret; -+ synchronized (this.cachedBlockPropagators) { -+ ret = this.cachedBlockPropagators.pollFirst(); -+ } -+ -+ if (ret == null) { -+ return new BlockStarLightEngine(this.world); -+ } -+ return ret; -+ } -+ -+ protected final void releaseBlockLightEngine(final BlockStarLightEngine engine) { -+ if (this.cachedBlockPropagators == null) { -+ return; -+ } -+ synchronized (this.cachedBlockPropagators) { -+ this.cachedBlockPropagators.addFirst(engine); -+ } -+ } -+ -+ public LightQueue.ChunkTasks blockChange(final BlockPos pos) { -+ if (this.world == null || pos.getY() < WorldUtil.getMinBlockY(this.world) || pos.getY() > WorldUtil.getMaxBlockY(this.world)) { // empty world -+ return null; -+ } -+ -+ return this.lightQueue.queueBlockChange(pos); -+ } -+ -+ public LightQueue.ChunkTasks sectionChange(final SectionPos pos, final boolean newEmptyValue) { -+ if (this.world == null) { // empty world -+ return null; -+ } -+ -+ return this.lightQueue.queueSectionChange(pos, newEmptyValue); -+ } -+ -+ public void forceLoadInChunk(final ChunkAccess chunk, final Boolean[] emptySections) { -+ final SkyStarLightEngine skyEngine = this.getSkyLightEngine(); -+ final BlockStarLightEngine blockEngine = this.getBlockLightEngine(); -+ -+ try { -+ if (skyEngine != null) { -+ skyEngine.forceHandleEmptySectionChanges(this.lightAccess, chunk, emptySections); -+ } -+ if (blockEngine != null) { -+ blockEngine.forceHandleEmptySectionChanges(this.lightAccess, chunk, emptySections); -+ } -+ } finally { -+ this.releaseSkyLightEngine(skyEngine); -+ this.releaseBlockLightEngine(blockEngine); -+ } -+ } -+ -+ public void loadInChunk(final int chunkX, final int chunkZ, final Boolean[] emptySections) { -+ final SkyStarLightEngine skyEngine = this.getSkyLightEngine(); -+ final BlockStarLightEngine blockEngine = this.getBlockLightEngine(); -+ -+ try { -+ if (skyEngine != null) { -+ skyEngine.handleEmptySectionChanges(this.lightAccess, chunkX, chunkZ, emptySections); -+ } -+ if (blockEngine != null) { -+ blockEngine.handleEmptySectionChanges(this.lightAccess, chunkX, chunkZ, emptySections); -+ } -+ } finally { -+ this.releaseSkyLightEngine(skyEngine); -+ this.releaseBlockLightEngine(blockEngine); -+ } -+ } -+ -+ public void lightChunk(final ChunkAccess chunk, final Boolean[] emptySections) { -+ final SkyStarLightEngine skyEngine = this.getSkyLightEngine(); -+ final BlockStarLightEngine blockEngine = this.getBlockLightEngine(); -+ -+ try { -+ if (skyEngine != null) { -+ skyEngine.light(this.lightAccess, chunk, emptySections); -+ } -+ if (blockEngine != null) { -+ blockEngine.light(this.lightAccess, chunk, emptySections); -+ } -+ } finally { -+ this.releaseSkyLightEngine(skyEngine); -+ this.releaseBlockLightEngine(blockEngine); -+ } -+ } -+ -+ public void relightChunks(final Set chunks, final Consumer chunkLightCallback, -+ final IntConsumer onComplete) { -+ final SkyStarLightEngine skyEngine = this.getSkyLightEngine(); -+ final BlockStarLightEngine blockEngine = this.getBlockLightEngine(); -+ -+ try { -+ if (skyEngine != null) { -+ skyEngine.relightChunks(this.lightAccess, chunks, blockEngine == null ? chunkLightCallback : null, -+ blockEngine == null ? onComplete : null); -+ } -+ if (blockEngine != null) { -+ blockEngine.relightChunks(this.lightAccess, chunks, chunkLightCallback, onComplete); -+ } -+ } finally { -+ this.releaseSkyLightEngine(skyEngine); -+ this.releaseBlockLightEngine(blockEngine); -+ } -+ } -+ -+ public void checkChunkEdges(final int chunkX, final int chunkZ) { -+ this.checkSkyEdges(chunkX, chunkZ); -+ this.checkBlockEdges(chunkX, chunkZ); -+ } -+ -+ public void checkSkyEdges(final int chunkX, final int chunkZ) { -+ final SkyStarLightEngine skyEngine = this.getSkyLightEngine(); -+ -+ try { -+ if (skyEngine != null) { -+ skyEngine.checkChunkEdges(this.lightAccess, chunkX, chunkZ); -+ } -+ } finally { -+ this.releaseSkyLightEngine(skyEngine); -+ } -+ } -+ -+ public void checkBlockEdges(final int chunkX, final int chunkZ) { -+ final BlockStarLightEngine blockEngine = this.getBlockLightEngine(); -+ try { -+ if (blockEngine != null) { -+ blockEngine.checkChunkEdges(this.lightAccess, chunkX, chunkZ); -+ } -+ } finally { -+ this.releaseBlockLightEngine(blockEngine); -+ } -+ } -+ -+ public void checkSkyEdges(final int chunkX, final int chunkZ, final ShortCollection sections) { -+ final SkyStarLightEngine skyEngine = this.getSkyLightEngine(); -+ -+ try { -+ if (skyEngine != null) { -+ skyEngine.checkChunkEdges(this.lightAccess, chunkX, chunkZ, sections); -+ } -+ } finally { -+ this.releaseSkyLightEngine(skyEngine); -+ } -+ } -+ -+ public void checkBlockEdges(final int chunkX, final int chunkZ, final ShortCollection sections) { -+ final BlockStarLightEngine blockEngine = this.getBlockLightEngine(); -+ try { -+ if (blockEngine != null) { -+ blockEngine.checkChunkEdges(this.lightAccess, chunkX, chunkZ, sections); -+ } -+ } finally { -+ this.releaseBlockLightEngine(blockEngine); -+ } -+ } -+ -+ public void scheduleChunkLight(final ChunkPos pos, final Runnable run) { -+ this.lightQueue.queueChunkLighting(pos, run); -+ } -+ -+ public void removeChunkTasks(final ChunkPos pos) { -+ this.lightQueue.removeChunk(pos); -+ } -+ -+ public void propagateChanges() { -+ if (this.lightQueue.isEmpty()) { -+ return; -+ } -+ -+ final SkyStarLightEngine skyEngine = this.getSkyLightEngine(); -+ final BlockStarLightEngine blockEngine = this.getBlockLightEngine(); -+ -+ try { -+ LightQueue.ChunkTasks task; -+ while ((task = this.lightQueue.removeFirstTask()) != null) { -+ if (task.lightTasks != null) { -+ for (final Runnable run : task.lightTasks) { -+ run.run(); -+ } -+ } -+ -+ final long coordinate = task.chunkCoordinate; -+ final int chunkX = CoordinateUtils.getChunkX(coordinate); -+ final int chunkZ = CoordinateUtils.getChunkZ(coordinate); -+ -+ final Set positions = task.changedPositions; -+ final Boolean[] sectionChanges = task.changedSectionSet; -+ -+ if (skyEngine != null && (!positions.isEmpty() || sectionChanges != null)) { -+ skyEngine.blocksChangedInChunk(this.lightAccess, chunkX, chunkZ, positions, sectionChanges); -+ } -+ if (blockEngine != null && (!positions.isEmpty() || sectionChanges != null)) { -+ blockEngine.blocksChangedInChunk(this.lightAccess, chunkX, chunkZ, positions, sectionChanges); -+ } -+ -+ if (skyEngine != null && task.queuedEdgeChecksSky != null) { -+ skyEngine.checkChunkEdges(this.lightAccess, chunkX, chunkZ, task.queuedEdgeChecksSky); -+ } -+ if (blockEngine != null && task.queuedEdgeChecksBlock != null) { -+ blockEngine.checkChunkEdges(this.lightAccess, chunkX, chunkZ, task.queuedEdgeChecksBlock); -+ } -+ -+ task.onComplete.complete(null); -+ } -+ } finally { -+ this.releaseSkyLightEngine(skyEngine); -+ this.releaseBlockLightEngine(blockEngine); -+ } -+ } -+ -+ public static final class LightQueue { -+ -+ protected final Long2ObjectLinkedOpenHashMap chunkTasks = new Long2ObjectLinkedOpenHashMap<>(); -+ protected final StarLightInterface manager; -+ -+ public LightQueue(final StarLightInterface manager) { -+ this.manager = manager; -+ } -+ -+ public synchronized boolean isEmpty() { -+ return this.chunkTasks.isEmpty(); -+ } -+ -+ public synchronized LightQueue.ChunkTasks queueBlockChange(final BlockPos pos) { -+ final ChunkTasks tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), ChunkTasks::new); -+ tasks.changedPositions.add(pos.immutable()); -+ return tasks; -+ } -+ -+ public synchronized LightQueue.ChunkTasks queueSectionChange(final SectionPos pos, final boolean newEmptyValue) { -+ final ChunkTasks tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), ChunkTasks::new); -+ -+ if (tasks.changedSectionSet == null) { -+ tasks.changedSectionSet = new Boolean[this.manager.maxSection - this.manager.minSection + 1]; -+ } -+ tasks.changedSectionSet[pos.getY() - this.manager.minSection] = Boolean.valueOf(newEmptyValue); -+ -+ return tasks; -+ } -+ -+ public synchronized LightQueue.ChunkTasks queueChunkLighting(final ChunkPos pos, final Runnable lightTask) { -+ final ChunkTasks tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), ChunkTasks::new); -+ if (tasks.lightTasks == null) { -+ tasks.lightTasks = new ArrayList<>(); -+ } -+ tasks.lightTasks.add(lightTask); -+ -+ return tasks; -+ } -+ -+ public synchronized LightQueue.ChunkTasks queueChunkSkylightEdgeCheck(final SectionPos pos, final ShortCollection sections) { -+ final ChunkTasks tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), ChunkTasks::new); -+ -+ ShortOpenHashSet queuedEdges = tasks.queuedEdgeChecksSky; -+ if (queuedEdges == null) { -+ queuedEdges = tasks.queuedEdgeChecksSky = new ShortOpenHashSet(); -+ } -+ queuedEdges.addAll(sections); -+ -+ return tasks; -+ } -+ -+ public synchronized LightQueue.ChunkTasks queueChunkBlocklightEdgeCheck(final SectionPos pos, final ShortCollection sections) { -+ final ChunkTasks tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), ChunkTasks::new); -+ -+ ShortOpenHashSet queuedEdges = tasks.queuedEdgeChecksBlock; -+ if (queuedEdges == null) { -+ queuedEdges = tasks.queuedEdgeChecksBlock = new ShortOpenHashSet(); -+ } -+ queuedEdges.addAll(sections); -+ -+ return tasks; -+ } -+ -+ public void removeChunk(final ChunkPos pos) { -+ final ChunkTasks tasks; -+ synchronized (this) { -+ tasks = this.chunkTasks.remove(CoordinateUtils.getChunkKey(pos)); -+ } -+ if (tasks != null) { -+ tasks.onComplete.complete(null); -+ } -+ } -+ -+ public synchronized ChunkTasks removeFirstTask() { -+ if (this.chunkTasks.isEmpty()) { -+ return null; -+ } -+ return this.chunkTasks.removeFirst(); -+ } -+ -+ public static final class ChunkTasks { -+ -+ public final Set changedPositions = new ObjectOpenHashSet<>(); -+ public Boolean[] changedSectionSet; -+ public ShortOpenHashSet queuedEdgeChecksSky; -+ public ShortOpenHashSet queuedEdgeChecksBlock; -+ public List lightTasks; -+ -+ public boolean isTicketAdded = false; -+ public final CompletableFuture onComplete = new CompletableFuture<>(); -+ -+ public final long chunkCoordinate; -+ -+ public ChunkTasks(final long chunkCoordinate) { -+ this.chunkCoordinate = chunkCoordinate; -+ } -+ } -+ } -+} -diff --git a/src/main/java/ca/spottedleaf/starlight/common/util/CoordinateUtils.java b/src/main/java/ca/spottedleaf/starlight/common/util/CoordinateUtils.java -new file mode 100644 -index 0000000000000000000000000000000000000000..16a4a14e7ccf9e4d7fdf1166674fe8f529c06d39 ---- /dev/null -+++ b/src/main/java/ca/spottedleaf/starlight/common/util/CoordinateUtils.java -@@ -0,0 +1,128 @@ -+package ca.spottedleaf.starlight.common.util; -+ -+import net.minecraft.core.BlockPos; -+import net.minecraft.core.SectionPos; -+import net.minecraft.util.Mth; -+import net.minecraft.world.entity.Entity; -+import net.minecraft.world.level.ChunkPos; -+ -+public final class CoordinateUtils { -+ -+ // dx, dz are relative to the target chunk -+ // dx, dz in [-radius, radius] -+ public static int getNeighbourMappedIndex(final int dx, final int dz, final int radius) { -+ return (dx + radius) + (2 * radius + 1)*(dz + radius); -+ } -+ -+ // the chunk keys are compatible with vanilla -+ -+ public static long getChunkKey(final BlockPos pos) { -+ return ((long)(pos.getZ() >> 4) << 32) | ((pos.getX() >> 4) & 0xFFFFFFFFL); -+ } -+ -+ public static long getChunkKey(final Entity entity) { -+ return ((long)(Mth.floor(entity.getZ()) >> 4) << 32) | ((Mth.floor(entity.getX()) >> 4) & 0xFFFFFFFFL); -+ } -+ -+ public static long getChunkKey(final ChunkPos pos) { -+ return ((long)pos.z << 32) | (pos.x & 0xFFFFFFFFL); -+ } -+ -+ public static long getChunkKey(final SectionPos pos) { -+ return ((long)pos.getZ() << 32) | (pos.getX() & 0xFFFFFFFFL); -+ } -+ -+ public static long getChunkKey(final int x, final int z) { -+ return ((long)z << 32) | (x & 0xFFFFFFFFL); -+ } -+ -+ public static int getChunkX(final long chunkKey) { -+ return (int)chunkKey; -+ } -+ -+ public static int getChunkZ(final long chunkKey) { -+ return (int)(chunkKey >>> 32); -+ } -+ -+ public static int getChunkCoordinate(final double blockCoordinate) { -+ return Mth.floor(blockCoordinate) >> 4; -+ } -+ -+ // the section keys are compatible with vanilla's -+ -+ static final int SECTION_X_BITS = 22; -+ static final long SECTION_X_MASK = (1L << SECTION_X_BITS) - 1; -+ static final int SECTION_Y_BITS = 20; -+ static final long SECTION_Y_MASK = (1L << SECTION_Y_BITS) - 1; -+ static final int SECTION_Z_BITS = 22; -+ static final long SECTION_Z_MASK = (1L << SECTION_Z_BITS) - 1; -+ // format is y,z,x (in order of LSB to MSB) -+ static final int SECTION_Y_SHIFT = 0; -+ static final int SECTION_Z_SHIFT = SECTION_Y_SHIFT + SECTION_Y_BITS; -+ static final int SECTION_X_SHIFT = SECTION_Z_SHIFT + SECTION_X_BITS; -+ static final int SECTION_TO_BLOCK_SHIFT = 4; -+ -+ public static long getChunkSectionKey(final int x, final int y, final int z) { -+ return ((x & SECTION_X_MASK) << SECTION_X_SHIFT) -+ | ((y & SECTION_Y_MASK) << SECTION_Y_SHIFT) -+ | ((z & SECTION_Z_MASK) << SECTION_Z_SHIFT); -+ } -+ -+ public static long getChunkSectionKey(final SectionPos pos) { -+ return ((pos.getX() & SECTION_X_MASK) << SECTION_X_SHIFT) -+ | ((pos.getY() & SECTION_Y_MASK) << SECTION_Y_SHIFT) -+ | ((pos.getZ() & SECTION_Z_MASK) << SECTION_Z_SHIFT); -+ } -+ -+ public static long getChunkSectionKey(final ChunkPos pos, final int y) { -+ return ((pos.x & SECTION_X_MASK) << SECTION_X_SHIFT) -+ | ((y & SECTION_Y_MASK) << SECTION_Y_SHIFT) -+ | ((pos.z & SECTION_Z_MASK) << SECTION_Z_SHIFT); -+ } -+ -+ public static long getChunkSectionKey(final BlockPos pos) { -+ return (((long)pos.getX() << (SECTION_X_SHIFT - SECTION_TO_BLOCK_SHIFT)) & (SECTION_X_MASK << SECTION_X_SHIFT)) | -+ ((pos.getY() >> SECTION_TO_BLOCK_SHIFT) & (SECTION_Y_MASK << SECTION_Y_SHIFT)) | -+ (((long)pos.getZ() << (SECTION_Z_SHIFT - SECTION_TO_BLOCK_SHIFT)) & (SECTION_Z_MASK << SECTION_Z_SHIFT)); -+ } -+ -+ public static long getChunkSectionKey(final Entity entity) { -+ return ((Mth.lfloor(entity.getX()) << (SECTION_X_SHIFT - SECTION_TO_BLOCK_SHIFT)) & (SECTION_X_MASK << SECTION_X_SHIFT)) | -+ ((Mth.lfloor(entity.getY()) >> SECTION_TO_BLOCK_SHIFT) & (SECTION_Y_MASK << SECTION_Y_SHIFT)) | -+ ((Mth.lfloor(entity.getZ()) << (SECTION_Z_SHIFT - SECTION_TO_BLOCK_SHIFT)) & (SECTION_Z_MASK << SECTION_Z_SHIFT)); -+ } -+ -+ public static int getChunkSectionX(final long key) { -+ return (int)(key << (Long.SIZE - (SECTION_X_SHIFT + SECTION_X_BITS)) >> (Long.SIZE - SECTION_X_BITS)); -+ } -+ -+ public static int getChunkSectionY(final long key) { -+ return (int)(key << (Long.SIZE - (SECTION_Y_SHIFT + SECTION_Y_BITS)) >> (Long.SIZE - SECTION_Y_BITS)); -+ } -+ -+ public static int getChunkSectionZ(final long key) { -+ return (int)(key << (Long.SIZE - (SECTION_Z_SHIFT + SECTION_Z_BITS)) >> (Long.SIZE - SECTION_Z_BITS)); -+ } -+ -+ // the block coordinates are not necessarily compatible with vanilla's -+ -+ public static int getBlockCoordinate(final double blockCoordinate) { -+ return Mth.floor(blockCoordinate); -+ } -+ -+ public static long getBlockKey(final int x, final int y, final int z) { -+ return ((long)x & 0x7FFFFFF) | (((long)z & 0x7FFFFFF) << 27) | ((long)y << 54); -+ } -+ -+ public static long getBlockKey(final BlockPos pos) { -+ return ((long)pos.getX() & 0x7FFFFFF) | (((long)pos.getZ() & 0x7FFFFFF) << 27) | ((long)pos.getY() << 54); -+ } -+ -+ public static long getBlockKey(final Entity entity) { -+ return ((long)entity.getX() & 0x7FFFFFF) | (((long)entity.getZ() & 0x7FFFFFF) << 27) | ((long)entity.getY() << 54); -+ } -+ -+ private CoordinateUtils() { -+ throw new RuntimeException(); -+ } -+} -diff --git a/src/main/java/ca/spottedleaf/starlight/common/util/IntegerUtil.java b/src/main/java/ca/spottedleaf/starlight/common/util/IntegerUtil.java -new file mode 100644 -index 0000000000000000000000000000000000000000..fabf1e97c019c7365212f40018dcd08d3b828113 ---- /dev/null -+++ b/src/main/java/ca/spottedleaf/starlight/common/util/IntegerUtil.java -@@ -0,0 +1,242 @@ -+package ca.spottedleaf.starlight.common.util; -+ -+public final class IntegerUtil { -+ -+ public static final int HIGH_BIT_U32 = Integer.MIN_VALUE; -+ public static final long HIGH_BIT_U64 = Long.MIN_VALUE; -+ -+ public static int ceilLog2(final int value) { -+ return Integer.SIZE - Integer.numberOfLeadingZeros(value - 1); // see doc of numberOfLeadingZeros -+ } -+ -+ public static long ceilLog2(final long value) { -+ return Long.SIZE - Long.numberOfLeadingZeros(value - 1); // see doc of numberOfLeadingZeros -+ } -+ -+ public static int floorLog2(final int value) { -+ // xor is optimized subtract for 2^n -1 -+ // note that (2^n -1) - k = (2^n -1) ^ k for k <= (2^n - 1) -+ return (Integer.SIZE - 1) ^ Integer.numberOfLeadingZeros(value); // see doc of numberOfLeadingZeros -+ } -+ -+ public static int floorLog2(final long value) { -+ // xor is optimized subtract for 2^n -1 -+ // note that (2^n -1) - k = (2^n -1) ^ k for k <= (2^n - 1) -+ return (Long.SIZE - 1) ^ Long.numberOfLeadingZeros(value); // see doc of numberOfLeadingZeros -+ } -+ -+ public static int roundCeilLog2(final int value) { -+ // optimized variant of 1 << (32 - leading(val - 1)) -+ // given -+ // 1 << n = HIGH_BIT_32 >>> (31 - n) for n [0, 32) -+ // 1 << (32 - leading(val - 1)) = HIGH_BIT_32 >>> (31 - (32 - leading(val - 1))) -+ // HIGH_BIT_32 >>> (31 - (32 - leading(val - 1))) -+ // HIGH_BIT_32 >>> (31 - 32 + leading(val - 1)) -+ // HIGH_BIT_32 >>> (-1 + leading(val - 1)) -+ return HIGH_BIT_U32 >>> (Integer.numberOfLeadingZeros(value - 1) - 1); -+ } -+ -+ public static long roundCeilLog2(final long value) { -+ // see logic documented above -+ return HIGH_BIT_U64 >>> (Long.numberOfLeadingZeros(value - 1) - 1); -+ } -+ -+ public static int roundFloorLog2(final int value) { -+ // optimized variant of 1 << (31 - leading(val)) -+ // given -+ // 1 << n = HIGH_BIT_32 >>> (31 - n) for n [0, 32) -+ // 1 << (31 - leading(val)) = HIGH_BIT_32 >> (31 - (31 - leading(val))) -+ // HIGH_BIT_32 >> (31 - (31 - leading(val))) -+ // HIGH_BIT_32 >> (31 - 31 + leading(val)) -+ return HIGH_BIT_U32 >>> Integer.numberOfLeadingZeros(value); -+ } -+ -+ public static long roundFloorLog2(final long value) { -+ // see logic documented above -+ return HIGH_BIT_U64 >>> Long.numberOfLeadingZeros(value); -+ } -+ -+ public static boolean isPowerOfTwo(final int n) { -+ // 2^n has one bit -+ // note: this rets true for 0 still -+ return IntegerUtil.getTrailingBit(n) == n; -+ } -+ -+ public static boolean isPowerOfTwo(final long n) { -+ // 2^n has one bit -+ // note: this rets true for 0 still -+ return IntegerUtil.getTrailingBit(n) == n; -+ } -+ -+ public static int getTrailingBit(final int n) { -+ return -n & n; -+ } -+ -+ public static long getTrailingBit(final long n) { -+ return -n & n; -+ } -+ -+ public static int trailingZeros(final int n) { -+ return Integer.numberOfTrailingZeros(n); -+ } -+ -+ public static int trailingZeros(final long n) { -+ return Long.numberOfTrailingZeros(n); -+ } -+ -+ // from hacker's delight (signed division magic value) -+ public static int getDivisorMultiple(final long numbers) { -+ return (int)(numbers >>> 32); -+ } -+ -+ // from hacker's delight (signed division magic value) -+ public static int getDivisorShift(final long numbers) { -+ return (int)numbers; -+ } -+ -+ // copied from hacker's delight (signed division magic value) -+ // http://www.hackersdelight.org/hdcodetxt/magic.c.txt -+ public static long getDivisorNumbers(final int d) { -+ final int ad = branchlessAbs(d); -+ -+ if (ad < 2) { -+ throw new IllegalArgumentException("|number| must be in [2, 2^31 -1], not: " + d); -+ } -+ -+ final int two31 = 0x80000000; -+ final long mask = 0xFFFFFFFFL; // mask for enforcing unsigned behaviour -+ -+ /* -+ Signed usage: -+ int number; -+ long magic = getDivisorNumbers(div); -+ long mul = magic >>> 32; -+ int sign = number >> 31; -+ int result = (int)(((long)number * mul) >>> magic) - sign; -+ */ -+ /* -+ Unsigned usage: -+ int number; -+ long magic = getDivisorNumbers(div); -+ long mul = magic >>> 32; -+ int result = (int)(((long)number * mul) >>> magic); -+ */ -+ -+ int p = 31; -+ -+ // all these variables are UNSIGNED! -+ int t = two31 + (d >>> 31); -+ int anc = t - 1 - (int)((t & mask)%ad); -+ int q1 = (int)((two31 & mask)/(anc & mask)); -+ int r1 = two31 - q1*anc; -+ int q2 = (int)((two31 & mask)/(ad & mask)); -+ int r2 = two31 - q2*ad; -+ int delta; -+ -+ do { -+ p = p + 1; -+ q1 = 2*q1; // Update q1 = 2**p/|nc|. -+ r1 = 2*r1; // Update r1 = rem(2**p, |nc|). -+ if ((r1 & mask) >= (anc & mask)) {// (Must be an unsigned comparison here) -+ q1 = q1 + 1; -+ r1 = r1 - anc; -+ } -+ q2 = 2*q2; // Update q2 = 2**p/|d|. -+ r2 = 2*r2; // Update r2 = rem(2**p, |d|). -+ if ((r2 & mask) >= (ad & mask)) {// (Must be an unsigned comparison here) -+ q2 = q2 + 1; -+ r2 = r2 - ad; -+ } -+ delta = ad - r2; -+ } while ((q1 & mask) < (delta & mask) || (q1 == delta && r1 == 0)); -+ -+ int magicNum = q2 + 1; -+ if (d < 0) { -+ magicNum = -magicNum; -+ } -+ int shift = p; -+ return ((long)magicNum << 32) | shift; -+ } -+ -+ public static int branchlessAbs(final int val) { -+ // -n = -1 ^ n + 1 -+ final int mask = val >> (Integer.SIZE - 1); // -1 if < 0, 0 if >= 0 -+ return (mask ^ val) - mask; // if val < 0, then (0 ^ val) - 0 else (-1 ^ val) + 1 -+ } -+ -+ public static long branchlessAbs(final long val) { -+ // -n = -1 ^ n + 1 -+ final long mask = val >> (Long.SIZE - 1); // -1 if < 0, 0 if >= 0 -+ return (mask ^ val) - mask; // if val < 0, then (0 ^ val) - 0 else (-1 ^ val) + 1 -+ } -+ -+ //https://github.com/skeeto/hash-prospector for hash functions -+ -+ //score = ~590.47984224483832 -+ public static int hash0(int x) { -+ x *= 0x36935555; -+ x ^= x >>> 16; -+ return x; -+ } -+ -+ //score = ~310.01596637036749 -+ public static int hash1(int x) { -+ x ^= x >>> 15; -+ x *= 0x356aaaad; -+ x ^= x >>> 17; -+ return x; -+ } -+ -+ public static int hash2(int x) { -+ x ^= x >>> 16; -+ x *= 0x7feb352d; -+ x ^= x >>> 15; -+ x *= 0x846ca68b; -+ x ^= x >>> 16; -+ return x; -+ } -+ -+ public static int hash3(int x) { -+ x ^= x >>> 17; -+ x *= 0xed5ad4bb; -+ x ^= x >>> 11; -+ x *= 0xac4c1b51; -+ x ^= x >>> 15; -+ x *= 0x31848bab; -+ x ^= x >>> 14; -+ return x; -+ } -+ -+ //score = ~365.79959673201887 -+ public static long hash1(long x) { -+ x ^= x >>> 27; -+ x *= 0xb24924b71d2d354bL; -+ x ^= x >>> 28; -+ return x; -+ } -+ -+ //h2 hash -+ public static long hash2(long x) { -+ x ^= x >>> 32; -+ x *= 0xd6e8feb86659fd93L; -+ x ^= x >>> 32; -+ x *= 0xd6e8feb86659fd93L; -+ x ^= x >>> 32; -+ return x; -+ } -+ -+ public static long hash3(long x) { -+ x ^= x >>> 45; -+ x *= 0xc161abe5704b6c79L; -+ x ^= x >>> 41; -+ x *= 0xe3e5389aedbc90f7L; -+ x ^= x >>> 56; -+ x *= 0x1f9aba75a52db073L; -+ x ^= x >>> 53; -+ return x; -+ } -+ -+ private IntegerUtil() { -+ throw new RuntimeException(); -+ } -+} -diff --git a/src/main/java/ca/spottedleaf/starlight/common/util/SaveUtil.java b/src/main/java/ca/spottedleaf/starlight/common/util/SaveUtil.java -new file mode 100644 -index 0000000000000000000000000000000000000000..c2903150c8fc6955f4f4f71acc932b6c2ac83484 ---- /dev/null -+++ b/src/main/java/ca/spottedleaf/starlight/common/util/SaveUtil.java -@@ -0,0 +1,192 @@ -+package ca.spottedleaf.starlight.common.util; -+ -+import ca.spottedleaf.starlight.common.light.SWMRNibbleArray; -+import ca.spottedleaf.starlight.common.light.StarLightEngine; -+import com.mojang.logging.LogUtils; -+import net.minecraft.nbt.CompoundTag; -+import net.minecraft.nbt.ListTag; -+import net.minecraft.server.level.ServerLevel; -+import net.minecraft.world.level.ChunkPos; -+import net.minecraft.world.level.Level; -+import net.minecraft.world.level.chunk.ChunkAccess; -+import net.minecraft.world.level.chunk.status.ChunkStatus; -+import org.slf4j.Logger; -+ -+public final class SaveUtil { -+ -+ private static final Logger LOGGER = LogUtils.getLogger(); -+ -+ private static final int STARLIGHT_LIGHT_VERSION = 9; -+ -+ public static int getLightVersion() { -+ return STARLIGHT_LIGHT_VERSION; -+ } -+ -+ private static final String BLOCKLIGHT_STATE_TAG = "starlight.blocklight_state"; -+ private static final String SKYLIGHT_STATE_TAG = "starlight.skylight_state"; -+ private static final String STARLIGHT_VERSION_TAG = "starlight.light_version"; -+ -+ public static void saveLightHook(final Level world, final ChunkAccess chunk, final CompoundTag nbt) { -+ try { -+ saveLightHookReal(world, chunk, nbt); -+ } catch (final Throwable ex) { -+ // failing to inject is not fatal so we catch anything here. if it fails, it will have correctly set lit to false -+ // for Vanilla to relight on load and it will not set our lit tag so we will relight on load -+ if (ex instanceof ThreadDeath) { -+ throw (ThreadDeath)ex; -+ } -+ LOGGER.warn("Failed to inject light data into save data for chunk " + chunk.getPos() + ", chunk light will be recalculated on its next load", ex); -+ } -+ } -+ -+ private static void saveLightHookReal(final Level world, final ChunkAccess chunk, final CompoundTag tag) { -+ if (tag == null) { -+ return; -+ } -+ -+ final int minSection = WorldUtil.getMinLightSection(world); -+ final int maxSection = WorldUtil.getMaxLightSection(world); -+ -+ SWMRNibbleArray[] blockNibbles = chunk.getBlockNibbles(); -+ SWMRNibbleArray[] skyNibbles = chunk.getSkyNibbles(); -+ -+ boolean lit = chunk.isLightCorrect() || !(world instanceof ServerLevel); -+ // diff start - store our tag for whether light data is init'd -+ if (lit) { -+ tag.putBoolean("isLightOn", false); -+ } -+ // diff end - store our tag for whether light data is init'd -+ ChunkStatus status = ChunkStatus.byName(tag.getString("Status")); -+ -+ CompoundTag[] sections = new CompoundTag[maxSection - minSection + 1]; -+ -+ ListTag sectionsStored = tag.getList("sections", 10); -+ -+ for (int i = 0; i < sectionsStored.size(); ++i) { -+ CompoundTag sectionStored = sectionsStored.getCompound(i); -+ int k = sectionStored.getByte("Y"); -+ -+ // strip light data -+ sectionStored.remove("BlockLight"); -+ sectionStored.remove("SkyLight"); -+ -+ if (!sectionStored.isEmpty()) { -+ sections[k - minSection] = sectionStored; -+ } -+ } -+ -+ if (lit && status.isOrAfter(ChunkStatus.LIGHT)) { -+ for (int i = minSection; i <= maxSection; ++i) { -+ SWMRNibbleArray.SaveState blockNibble = blockNibbles[i - minSection].getSaveState(); -+ SWMRNibbleArray.SaveState skyNibble = skyNibbles[i - minSection].getSaveState(); -+ if (blockNibble != null || skyNibble != null) { -+ CompoundTag section = sections[i - minSection]; -+ if (section == null) { -+ section = new CompoundTag(); -+ section.putByte("Y", (byte)i); -+ sections[i - minSection] = section; -+ } -+ -+ // we store under the same key so mod programs editing nbt -+ // can still read the data, hopefully. -+ // however, for compatibility we store chunks as unlit so vanilla -+ // is forced to re-light them if it encounters our data. It's too much of a burden -+ // to try and maintain compatibility with a broken and inferior skylight management system. -+ -+ if (blockNibble != null) { -+ if (blockNibble.data != null) { -+ section.putByteArray("BlockLight", blockNibble.data); -+ } -+ section.putInt(BLOCKLIGHT_STATE_TAG, blockNibble.state); -+ } -+ -+ if (skyNibble != null) { -+ if (skyNibble.data != null) { -+ section.putByteArray("SkyLight", skyNibble.data); -+ } -+ section.putInt(SKYLIGHT_STATE_TAG, skyNibble.state); -+ } -+ } -+ } -+ } -+ -+ // rewrite section list -+ sectionsStored.clear(); -+ for (CompoundTag section : sections) { -+ if (section != null) { -+ sectionsStored.add(section); -+ } -+ } -+ tag.put("sections", sectionsStored); -+ if (lit) { -+ tag.putInt(STARLIGHT_VERSION_TAG, STARLIGHT_LIGHT_VERSION); // only mark as fully lit after we have successfully injected our data -+ } -+ } -+ -+ public static void loadLightHook(final Level world, final ChunkPos pos, final CompoundTag tag, final ChunkAccess into) { -+ try { -+ loadLightHookReal(world, pos, tag, into); -+ } catch (final Throwable ex) { -+ // failing to inject is not fatal so we catch anything here. if it fails, then we simply relight. Not a problem, we get correct -+ // lighting in both cases. -+ if (ex instanceof ThreadDeath) { -+ throw (ThreadDeath)ex; -+ } -+ LOGGER.warn("Failed to load light for chunk " + pos + ", light will be recalculated", ex); -+ } -+ } -+ -+ private static void loadLightHookReal(final Level world, final ChunkPos pos, final CompoundTag tag, final ChunkAccess into) { -+ if (into == null) { -+ return; -+ } -+ final int minSection = WorldUtil.getMinLightSection(world); -+ final int maxSection = WorldUtil.getMaxLightSection(world); -+ -+ into.setLightCorrect(false); // mark as unlit in case we fail parsing -+ -+ SWMRNibbleArray[] blockNibbles = StarLightEngine.getFilledEmptyLight(world); -+ SWMRNibbleArray[] skyNibbles = StarLightEngine.getFilledEmptyLight(world); -+ -+ -+ // start copy from the original method -+ boolean lit = tag.get("isLightOn") != null && tag.getInt(STARLIGHT_VERSION_TAG) == STARLIGHT_LIGHT_VERSION; -+ boolean canReadSky = world.dimensionType().hasSkyLight(); -+ ChunkStatus status = ChunkStatus.byName(tag.getString("Status")); -+ if (lit && status.isOrAfter(ChunkStatus.LIGHT)) { // diff - we add the status check here -+ ListTag sections = tag.getList("sections", 10); -+ -+ for (int i = 0; i < sections.size(); ++i) { -+ CompoundTag sectionData = sections.getCompound(i); -+ int y = sectionData.getByte("Y"); -+ -+ if (sectionData.contains("BlockLight", 7)) { -+ // this is where our diff is -+ blockNibbles[y - minSection] = new SWMRNibbleArray(sectionData.getByteArray("BlockLight").clone(), sectionData.getInt(BLOCKLIGHT_STATE_TAG)); // clone for data safety -+ } else { -+ blockNibbles[y - minSection] = new SWMRNibbleArray(null, sectionData.getInt(BLOCKLIGHT_STATE_TAG)); -+ } -+ -+ if (canReadSky) { -+ if (sectionData.contains("SkyLight", 7)) { -+ // we store under the same key so mod programs editing nbt -+ // can still read the data, hopefully. -+ // however, for compatibility we store chunks as unlit so vanilla -+ // is forced to re-light them if it encounters our data. It's too much of a burden -+ // to try and maintain compatibility with a broken and inferior skylight management system. -+ skyNibbles[y - minSection] = new SWMRNibbleArray(sectionData.getByteArray("SkyLight").clone(), sectionData.getInt(SKYLIGHT_STATE_TAG)); // clone for data safety -+ } else { -+ skyNibbles[y - minSection] = new SWMRNibbleArray(null, sectionData.getInt(SKYLIGHT_STATE_TAG)); -+ } -+ } -+ } -+ } -+ // end copy from vanilla -+ -+ into.setBlockNibbles(blockNibbles); -+ into.setSkyNibbles(skyNibbles); -+ into.setLightCorrect(lit); // now we set lit here, only after we've correctly parsed data -+ } -+ -+ private SaveUtil() {} -+} -diff --git a/src/main/java/ca/spottedleaf/starlight/common/util/WorldUtil.java b/src/main/java/ca/spottedleaf/starlight/common/util/WorldUtil.java -new file mode 100644 -index 0000000000000000000000000000000000000000..dd995e25ae620ae36cd5eecb2fe10ad034ba50d2 ---- /dev/null -+++ b/src/main/java/ca/spottedleaf/starlight/common/util/WorldUtil.java -@@ -0,0 +1,47 @@ -+package ca.spottedleaf.starlight.common.util; -+ -+import net.minecraft.world.level.LevelHeightAccessor; -+ -+public final class WorldUtil { -+ -+ // min, max are inclusive -+ -+ public static int getMaxSection(final LevelHeightAccessor world) { -+ return world.getMaxSection() - 1; // getMaxSection() is exclusive -+ } -+ -+ public static int getMinSection(final LevelHeightAccessor world) { -+ return world.getMinSection(); -+ } -+ -+ public static int getMaxLightSection(final LevelHeightAccessor world) { -+ return getMaxSection(world) + 1; -+ } -+ -+ public static int getMinLightSection(final LevelHeightAccessor world) { -+ return getMinSection(world) - 1; -+ } -+ -+ -+ -+ public static int getTotalSections(final LevelHeightAccessor world) { -+ return getMaxSection(world) - getMinSection(world) + 1; -+ } -+ -+ public static int getTotalLightSections(final LevelHeightAccessor world) { -+ return getMaxLightSection(world) - getMinLightSection(world) + 1; -+ } -+ -+ public static int getMinBlockY(final LevelHeightAccessor world) { -+ return getMinSection(world) << 4; -+ } -+ -+ public static int getMaxBlockY(final LevelHeightAccessor world) { -+ return (getMaxSection(world) << 4) | 15; -+ } -+ -+ private WorldUtil() { -+ throw new RuntimeException(); -+ } -+ -+} -diff --git a/src/main/java/io/papermc/paper/command/PaperCommand.java b/src/main/java/io/papermc/paper/command/PaperCommand.java -index 46bf42d5ea9e7b046f962531c5962d287cf44a41..a3f43dccb796f30f6e9389e1ae182f06e9024e96 100644 ---- a/src/main/java/io/papermc/paper/command/PaperCommand.java -+++ b/src/main/java/io/papermc/paper/command/PaperCommand.java -@@ -42,6 +42,7 @@ public final class PaperCommand extends Command { - commands.put(Set.of("dumpitem"), new DumpItemCommand()); - commands.put(Set.of("mobcaps", "playermobcaps"), new MobcapsCommand()); - commands.put(Set.of("dumplisteners"), new DumpListenersCommand()); -+ commands.put(Set.of("fixlight"), new FixLightCommand()); - - return commands.entrySet().stream() - .flatMap(entry -> entry.getKey().stream().map(s -> Map.entry(s, entry.getValue()))) -diff --git a/src/main/java/io/papermc/paper/command/subcommands/FixLightCommand.java b/src/main/java/io/papermc/paper/command/subcommands/FixLightCommand.java -new file mode 100644 -index 0000000000000000000000000000000000000000..56524cbe4303901007e1e7fb3703a19efbf79ae7 ---- /dev/null -+++ b/src/main/java/io/papermc/paper/command/subcommands/FixLightCommand.java -@@ -0,0 +1,109 @@ -+package io.papermc.paper.command.subcommands; -+ -+import io.papermc.paper.command.PaperSubcommand; -+import io.papermc.paper.util.MCUtil; -+import net.minecraft.server.level.ServerLevel; -+import net.minecraft.server.level.ServerPlayer; -+import net.minecraft.server.level.ThreadedLevelLightEngine; -+import net.minecraft.world.level.ChunkPos; -+import net.minecraft.world.level.chunk.ChunkAccess; -+import org.bukkit.command.CommandSender; -+import org.bukkit.craftbukkit.entity.CraftPlayer; -+import org.bukkit.entity.Player; -+import org.checkerframework.checker.nullness.qual.NonNull; -+import org.checkerframework.checker.nullness.qual.Nullable; -+import org.checkerframework.framework.qual.DefaultQualifier; -+ -+import static net.kyori.adventure.text.Component.text; -+import static net.kyori.adventure.text.format.NamedTextColor.BLUE; -+import static net.kyori.adventure.text.format.NamedTextColor.DARK_AQUA; -+import static net.kyori.adventure.text.format.NamedTextColor.RED; -+ -+@DefaultQualifier(NonNull.class) -+public final class FixLightCommand implements PaperSubcommand { -+ @Override -+ public boolean execute(final CommandSender sender, final String subCommand, final String[] args) { -+ this.doFixLight(sender, args); -+ return true; -+ } -+ -+ private void doFixLight(final CommandSender sender, final String[] args) { -+ if (!(sender instanceof Player)) { -+ sender.sendMessage(text("Only players can use this command", RED)); -+ return; -+ } -+ @Nullable Runnable post = null; -+ int radius = 2; -+ if (args.length > 0) { -+ try { -+ final int parsed = Integer.parseInt(args[0]); -+ if (parsed < 0) { -+ sender.sendMessage(text("Radius cannot be negative!", RED)); -+ return; -+ } -+ final int maxRadius = 32; -+ radius = Math.min(maxRadius, parsed); -+ if (radius != parsed) { -+ post = () -> sender.sendMessage(text("Radius '" + parsed + "' was not in the required range [0, " + maxRadius + "], it was lowered to the maximum (" + maxRadius + " chunks).", RED)); -+ } -+ } catch (final Exception e) { -+ sender.sendMessage(text("'" + args[0] + "' is not a valid number.", RED)); -+ return; -+ } -+ } -+ -+ CraftPlayer player = (CraftPlayer) sender; -+ ServerPlayer handle = player.getHandle(); -+ ServerLevel world = (ServerLevel) handle.level(); -+ ThreadedLevelLightEngine lightengine = world.getChunkSource().getLightEngine(); -+ this.starlightFixLight(handle, world, lightengine, radius, post); -+ } -+ -+ private void starlightFixLight( -+ final ServerPlayer sender, -+ final ServerLevel world, -+ final ThreadedLevelLightEngine lightengine, -+ final int radius, -+ final @Nullable Runnable done -+ ) { -+ final long start = System.nanoTime(); -+ final java.util.LinkedHashSet chunks = new java.util.LinkedHashSet<>(MCUtil.getSpiralOutChunks(sender.blockPosition(), radius)); // getChunkCoordinates is actually just bad mappings, this function rets position as blockpos -+ -+ final int[] pending = new int[1]; -+ for (java.util.Iterator iterator = chunks.iterator(); iterator.hasNext(); ) { -+ final ChunkPos chunkPos = iterator.next(); -+ -+ final @Nullable ChunkAccess chunk = (ChunkAccess) world.getChunkSource().getChunkForLighting(chunkPos.x, chunkPos.z); -+ if (chunk == null || !chunk.isLightCorrect() || !chunk.getStatus().isOrAfter(net.minecraft.world.level.chunk.status.ChunkStatus.LIGHT)) { -+ // cannot relight this chunk -+ iterator.remove(); -+ continue; -+ } -+ -+ ++pending[0]; -+ } -+ -+ final int[] relitChunks = new int[1]; -+ lightengine.relight(chunks, -+ (final ChunkPos chunkPos) -> { -+ ++relitChunks[0]; -+ sender.getBukkitEntity().sendMessage(text().color(DARK_AQUA).append( -+ text("Relit chunk ", BLUE), text(chunkPos.toString()), -+ text(", progress: ", BLUE), text((int) (Math.round(100.0 * (double) (relitChunks[0]) / (double) pending[0])) + "%") -+ )); -+ }, -+ (final int totalRelit) -> { -+ final long end = System.nanoTime(); -+ final long diff = Math.round(1.0e-6 * (end - start)); -+ sender.getBukkitEntity().sendMessage(text().color(DARK_AQUA).append( -+ text("Relit ", BLUE), text(totalRelit), -+ text(" chunks. Took ", BLUE), text(diff + "ms") -+ )); -+ if (done != null) { -+ done.run(); -+ } -+ } -+ ); -+ sender.getBukkitEntity().sendMessage(text().color(BLUE).append(text("Relighting "), text(pending[0], DARK_AQUA), text(" chunks"))); -+ } -+} -diff --git a/src/main/java/net/minecraft/server/level/ChunkHolder.java b/src/main/java/net/minecraft/server/level/ChunkHolder.java -index b12921579cb9ab3cbf5607841cc84f2f843624ea..88729d92878f98729eb5669cce5ae5b1418865a1 100644 ---- a/src/main/java/net/minecraft/server/level/ChunkHolder.java -+++ b/src/main/java/net/minecraft/server/level/ChunkHolder.java -@@ -51,7 +51,7 @@ public class ChunkHolder { - private volatile CompletableFuture> fullChunkFuture; private int fullChunkCreateCount; private volatile boolean isFullChunkReady; // Paper - cache chunk ticking stage - private volatile CompletableFuture> tickingChunkFuture; private volatile boolean isTickingReady; // Paper - cache chunk ticking stage - private volatile CompletableFuture> entityTickingChunkFuture; private volatile boolean isEntityTickingReady; // Paper - cache chunk ticking stage -- private CompletableFuture chunkToSave; -+ public CompletableFuture chunkToSave; // Paper - public - @Nullable - private final DebugBuffer chunkToSaveHistory; - public int oldTicketLevel; -@@ -261,6 +261,12 @@ public class ChunkHolder { - } - } - -+ // Paper start - starlight -+ public void broadcast(Packet packet, boolean onChunkViewEdge) { -+ this.broadcast(this.playerProvider.getPlayers(this.pos, onChunkViewEdge), packet); -+ } -+ // Paper end - starlight -+ - public void broadcastChanges(LevelChunk chunk) { - if (this.hasChangedSections || !this.skyChangedLightSectionFilter.isEmpty() || !this.blockChangedLightSectionFilter.isEmpty()) { - Level world = chunk.getLevel(); -diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java -index 35f627c58e93c03ee58b44877398432bba57dc2d..d3f63185edd1db9fab3887ea3f08982435b3a23c 100644 ---- a/src/main/java/net/minecraft/server/level/ChunkMap.java -+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java -@@ -128,7 +128,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - private final LongSet entitiesInLevel; - public final ServerLevel level; - private final ThreadedLevelLightEngine lightEngine; -- private final BlockableEventLoop mainThreadExecutor; -+ public final BlockableEventLoop mainThreadExecutor; // Paper - public - public ChunkGenerator generator; - private final RandomState randomState; - private final ChunkGeneratorStructureState chunkGeneratorState; -diff --git a/src/main/java/net/minecraft/server/level/DistanceManager.java b/src/main/java/net/minecraft/server/level/DistanceManager.java -index c473cb1888e9ab0e91ba44f1439b81742758304e..7a48ae2ba962ff56d0abff581b51f28b48bd9aae 100644 ---- a/src/main/java/net/minecraft/server/level/DistanceManager.java -+++ b/src/main/java/net/minecraft/server/level/DistanceManager.java -@@ -379,7 +379,7 @@ public abstract class DistanceManager { - } - - public void removeTicketsOnClosing() { -- ImmutableSet> immutableset = ImmutableSet.of(TicketType.UNKNOWN, TicketType.POST_TELEPORT, TicketType.LIGHT, TicketType.FUTURE_AWAIT); // Paper - add additional tickets to preserve -+ ImmutableSet> immutableset = ImmutableSet.of(TicketType.UNKNOWN, TicketType.POST_TELEPORT, TicketType.LIGHT, TicketType.FUTURE_AWAIT, TicketType.CHUNK_RELIGHT, ca.spottedleaf.starlight.common.light.StarLightInterface.CHUNK_WORK_TICKET); // Paper - add additional tickets to preserve - ObjectIterator>>> objectiterator = this.tickets.long2ObjectEntrySet().fastIterator(); - - while (objectiterator.hasNext()) { -diff --git a/src/main/java/net/minecraft/server/level/ThreadedLevelLightEngine.java b/src/main/java/net/minecraft/server/level/ThreadedLevelLightEngine.java -index 1dfae40ec19c4df0a97359941cf2c948cd1c9cb2..f206df06a7d8895175db31d4a840d7467ffe826f 100644 ---- a/src/main/java/net/minecraft/server/level/ThreadedLevelLightEngine.java -+++ b/src/main/java/net/minecraft/server/level/ThreadedLevelLightEngine.java -@@ -23,6 +23,17 @@ import net.minecraft.world.level.chunk.LightChunkGetter; - import net.minecraft.world.level.lighting.LevelLightEngine; - import org.slf4j.Logger; - -+// Paper start -+import ca.spottedleaf.starlight.common.light.StarLightEngine; -+import io.papermc.paper.util.CoordinateUtils; -+import java.util.function.Supplier; -+import net.minecraft.world.level.lighting.LayerLightEventListener; -+import it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap; -+import it.unimi.dsi.fastutil.longs.LongArrayList; -+import it.unimi.dsi.fastutil.longs.LongIterator; -+import net.minecraft.world.level.chunk.status.ChunkStatus; -+// Paper end -+ - public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCloseable { - public static final int DEFAULT_BATCH_SIZE = 1000; - private static final Logger LOGGER = LogUtils.getLogger(); -@@ -33,6 +44,12 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl - private final int taskPerBatch = 1000; - private final AtomicBoolean scheduled = new AtomicBoolean(); - -+ // Paper start - replace light engine impl -+ protected final ca.spottedleaf.starlight.common.light.StarLightInterface theLightEngine; -+ public final boolean hasBlockLight; -+ public final boolean hasSkyLight; -+ // Paper end - replace light engine impl -+ - public ThreadedLevelLightEngine( - LightChunkGetter chunkProvider, - ChunkMap chunkStorage, -@@ -40,11 +57,153 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl - ProcessorMailbox processor, - ProcessorHandle> executor - ) { -- super(chunkProvider, true, hasBlockLight); -+ super(chunkProvider, false, false); // Paper - destroy vanilla light engine state - this.chunkMap = chunkStorage; - this.sorterMailbox = executor; - this.taskMailbox = processor; -+ // Paper start - replace light engine impl -+ this.hasBlockLight = true; -+ this.hasSkyLight = hasBlockLight; // Nice variable name. -+ this.theLightEngine = new ca.spottedleaf.starlight.common.light.StarLightInterface(chunkProvider, this.hasSkyLight, this.hasBlockLight, this); -+ // Paper end - replace light engine impl -+ } -+ -+ // Paper start - replace light engine impl -+ protected final ChunkAccess getChunk(final int chunkX, final int chunkZ) { -+ return ((ServerLevel)this.theLightEngine.getWorld()).getChunkSource().getChunkAtImmediately(chunkX, chunkZ); -+ } -+ -+ protected long relightCounter; -+ -+ public int relight(java.util.Set chunks_param, -+ java.util.function.Consumer chunkLightCallback, -+ java.util.function.IntConsumer onComplete) { -+ if (!org.bukkit.Bukkit.isPrimaryThread()) { -+ throw new IllegalStateException("Must only be called on the main thread"); -+ } -+ -+ java.util.Set chunks = new java.util.LinkedHashSet<>(chunks_param); -+ // add tickets -+ java.util.Map ticketIds = new java.util.HashMap<>(); -+ int totalChunks = 0; -+ for (java.util.Iterator iterator = chunks.iterator(); iterator.hasNext();) { -+ final ChunkPos chunkPos = iterator.next(); -+ -+ final ChunkAccess chunk = (ChunkAccess)((ServerLevel)this.theLightEngine.getWorld()).getChunkSource().getChunkForLighting(chunkPos.x, chunkPos.z); -+ if (chunk == null || !chunk.isLightCorrect() || !chunk.getStatus().isOrAfter(ChunkStatus.LIGHT)) { -+ // cannot relight this chunk -+ iterator.remove(); -+ continue; -+ } -+ -+ final Long id = Long.valueOf(this.relightCounter++); -+ -+ ((ServerLevel)this.theLightEngine.getWorld()).getChunkSource().addTicketAtLevel(TicketType.CHUNK_RELIGHT, chunkPos, io.papermc.paper.util.MCUtil.getTicketLevelFor(ChunkStatus.LIGHT), id); -+ ticketIds.put(chunkPos, id); -+ -+ ++totalChunks; -+ } -+ -+ this.taskMailbox.tell(() -> { -+ this.theLightEngine.relightChunks(chunks, (ChunkPos chunkPos) -> { -+ chunkLightCallback.accept(chunkPos); -+ ((java.util.concurrent.Executor)((ServerLevel)this.theLightEngine.getWorld()).getChunkSource().mainThreadProcessor).execute(() -> { -+ ((ServerLevel)this.theLightEngine.getWorld()).getChunkSource().chunkMap.getUpdatingChunkIfPresent(chunkPos.toLong()).broadcast(new net.minecraft.network.protocol.game.ClientboundLightUpdatePacket(chunkPos, ThreadedLevelLightEngine.this, null, null), false); -+ ((ServerLevel)this.theLightEngine.getWorld()).getChunkSource().removeTicketAtLevel(TicketType.CHUNK_RELIGHT, chunkPos, io.papermc.paper.util.MCUtil.getTicketLevelFor(ChunkStatus.LIGHT), ticketIds.get(chunkPos)); -+ }); -+ }, onComplete); -+ }); -+ this.tryScheduleUpdate(); -+ -+ return totalChunks; -+ } -+ -+ private final Long2IntOpenHashMap chunksBeingWorkedOn = new Long2IntOpenHashMap(); -+ -+ private void queueTaskForSection(final int chunkX, final int chunkY, final int chunkZ, -+ final Supplier runnable) { -+ final ServerLevel world = (ServerLevel)this.theLightEngine.getWorld(); -+ -+ final ChunkAccess center = this.theLightEngine.getAnyChunkNow(chunkX, chunkZ); -+ if (center == null || !center.getStatus().isOrAfter(ChunkStatus.LIGHT)) { -+ // do not accept updates in unlit chunks, unless we might be generating a chunk. thanks to the amazing -+ // chunk scheduling, we could be lighting and generating a chunk at the same time -+ return; -+ } -+ -+ if (center.getStatus() != ChunkStatus.FULL) { -+ // do not keep chunk loaded, we are probably in a gen thread -+ // if we proceed to add a ticket the chunk will be loaded, which is not what we want (avoid cascading gen) -+ runnable.get(); -+ return; -+ } -+ -+ if (!world.getChunkSource().chunkMap.mainThreadExecutor.isSameThread()) { -+ // ticket logic is not safe to run off-main, re-schedule -+ world.getChunkSource().chunkMap.mainThreadExecutor.execute(() -> { -+ this.queueTaskForSection(chunkX, chunkY, chunkZ, runnable); -+ }); -+ return; -+ } -+ -+ final long key = CoordinateUtils.getChunkKey(chunkX, chunkZ); -+ -+ final ca.spottedleaf.starlight.common.light.StarLightInterface.LightQueue.ChunkTasks updateFuture = runnable.get(); -+ -+ if (updateFuture == null) { -+ // not scheduled -+ return; -+ } -+ -+ if (updateFuture.isTicketAdded) { -+ // ticket already added -+ return; -+ } -+ updateFuture.isTicketAdded = true; -+ -+ final int references = this.chunksBeingWorkedOn.addTo(key, 1); -+ if (references == 0) { -+ final ChunkPos pos = new ChunkPos(chunkX, chunkZ); -+ world.getChunkSource().addRegionTicket(ca.spottedleaf.starlight.common.light.StarLightInterface.CHUNK_WORK_TICKET, pos, 0, pos); -+ } -+ -+ updateFuture.onComplete.thenAcceptAsync((final Void ignore) -> { -+ final int newReferences = this.chunksBeingWorkedOn.get(key); -+ if (newReferences == 1) { -+ this.chunksBeingWorkedOn.remove(key); -+ final ChunkPos pos = new ChunkPos(chunkX, chunkZ); -+ world.getChunkSource().removeRegionTicket(ca.spottedleaf.starlight.common.light.StarLightInterface.CHUNK_WORK_TICKET, pos, 0, pos); -+ } else { -+ this.chunksBeingWorkedOn.put(key, newReferences - 1); -+ } -+ }, world.getChunkSource().chunkMap.mainThreadExecutor).whenComplete((final Void ignore, final Throwable thr) -> { -+ if (thr != null) { -+ LOGGER.error("Failed to remove ticket level for post chunk task " + new ChunkPos(chunkX, chunkZ), thr); -+ } -+ }); -+ } -+ -+ @Override -+ public boolean hasLightWork() { -+ // route to new light engine -+ return this.theLightEngine.hasUpdates(); -+ } -+ -+ @Override -+ public LayerLightEventListener getLayerListener(final LightLayer lightType) { -+ return lightType == LightLayer.BLOCK ? this.theLightEngine.getBlockReader() : this.theLightEngine.getSkyReader(); -+ } -+ -+ @Override -+ public int getRawBrightness(final BlockPos pos, final int ambientDarkness) { -+ // need to use new light hooks for this -+ final int sky = this.theLightEngine.getSkyReader().getLightValue(pos) - ambientDarkness; -+ // Don't fetch the block light level if the skylight level is 15, since the value will never be higher. -+ if (sky == 15) return 15; -+ final int block = this.theLightEngine.getBlockReader().getLightValue(pos); -+ return Math.max(sky, block); - } -+ // Paper end - replace light engine imp - - @Override - public void close() { -@@ -57,16 +216,16 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl - - @Override - public void checkBlock(BlockPos pos) { -- BlockPos blockPos = pos.immutable(); -- this.addTask( -- SectionPos.blockToSectionCoord(pos.getX()), -- SectionPos.blockToSectionCoord(pos.getZ()), -- ThreadedLevelLightEngine.TaskType.PRE_UPDATE, -- Util.name(() -> super.checkBlock(blockPos), () -> "checkBlock " + blockPos) -- ); -+ // Paper start - replace light engine impl -+ final BlockPos posCopy = pos.immutable(); -+ this.queueTaskForSection(posCopy.getX() >> 4, posCopy.getY() >> 4, posCopy.getZ() >> 4, () -> { -+ return this.theLightEngine.blockChange(posCopy); -+ }); -+ // Paper end - replace light engine impl - } - - protected void updateChunkStatus(ChunkPos pos) { -+ if (true) return; // Paper - replace light engine impl - this.addTask(pos.x, pos.z, () -> 0, ThreadedLevelLightEngine.TaskType.PRE_UPDATE, Util.name(() -> { - super.retainData(pos, false); - super.setLightEnabled(pos, false); -@@ -84,17 +243,16 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl - - @Override - public void updateSectionStatus(SectionPos pos, boolean notReady) { -- this.addTask( -- pos.x(), -- pos.z(), -- () -> 0, -- ThreadedLevelLightEngine.TaskType.PRE_UPDATE, -- Util.name(() -> super.updateSectionStatus(pos, notReady), () -> "updateSectionStatus " + pos + " " + notReady) -- ); -+ // Paper start - replace light engine impl -+ this.queueTaskForSection(pos.getX(), pos.getY(), pos.getZ(), () -> { -+ return this.theLightEngine.sectionChange(pos, notReady); -+ }); -+ // Paper end - replace light engine impl - } - - @Override - public void propagateLightSources(ChunkPos chunkPos) { -+ if (true) return; // Paper - replace light engine impl - this.addTask( - chunkPos.x, - chunkPos.z, -@@ -105,6 +263,7 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl - - @Override - public void setLightEnabled(ChunkPos pos, boolean retainData) { -+ if (true) return; // Paper - replace light engine impl - this.addTask( - pos.x, - pos.z, -@@ -115,6 +274,7 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl - - @Override - public void queueSectionData(LightLayer lightType, SectionPos pos, @Nullable DataLayer nibbles) { -+ if (true) return; // Paper - replace light engine impl - this.addTask( - pos.x(), - pos.z(), -@@ -139,12 +299,14 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl - - @Override - public void retainData(ChunkPos pos, boolean retainData) { -+ if (true) return; // Paper - replace light engine impl - this.addTask( - pos.x, pos.z, () -> 0, ThreadedLevelLightEngine.TaskType.PRE_UPDATE, Util.name(() -> super.retainData(pos, retainData), () -> "retainData " + pos) - ); - } - - public CompletableFuture initializeLight(ChunkAccess chunk, boolean bl) { -+ if (true) return CompletableFuture.completedFuture(chunk); // Paper - replace light engine impl - ChunkPos chunkPos = chunk.getPos(); - this.addTask(chunkPos.x, chunkPos.z, ThreadedLevelLightEngine.TaskType.PRE_UPDATE, Util.name(() -> { - LevelChunkSection[] levelChunkSections = chunk.getSections(); -@@ -165,6 +327,37 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl - } - - public CompletableFuture lightChunk(ChunkAccess chunk, boolean excludeBlocks) { -+ // Paper start - replace light engine impl -+ if (true) { -+ boolean lit = excludeBlocks; -+ final ChunkPos chunkPos = chunk.getPos(); -+ -+ return CompletableFuture.supplyAsync(() -> { -+ final Boolean[] emptySections = StarLightEngine.getEmptySectionsForChunk(chunk); -+ if (!lit) { -+ chunk.setLightCorrect(false); -+ this.theLightEngine.lightChunk(chunk, emptySections); -+ chunk.setLightCorrect(true); -+ } else { -+ this.theLightEngine.forceLoadInChunk(chunk, emptySections); -+ // can't really force the chunk to be edged checked, as we need neighbouring chunks - but we don't have -+ // them, so if it's not loaded then i guess we can't do edge checks. later loads of the chunk should -+ // catch what we miss here. -+ this.theLightEngine.checkChunkEdges(chunkPos.x, chunkPos.z); -+ } -+ -+ this.chunkMap.releaseLightTicket(chunkPos); -+ return chunk; -+ }, (runnable) -> { -+ this.theLightEngine.scheduleChunkLight(chunkPos, runnable); -+ this.tryScheduleUpdate(); -+ }).whenComplete((final ChunkAccess c, final Throwable throwable) -> { -+ if (throwable != null) { -+ LOGGER.error("Failed to light chunk " + chunkPos, throwable); -+ } -+ }); -+ } -+ // Paper end - replace light engine impl - ChunkPos chunkPos = chunk.getPos(); - chunk.setLightCorrect(false); - this.addTask(chunkPos.x, chunkPos.z, ThreadedLevelLightEngine.TaskType.PRE_UPDATE, Util.name(() -> { -@@ -180,7 +373,7 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl - } - - public void tryScheduleUpdate() { -- if ((!this.lightTasks.isEmpty() || super.hasLightWork()) && this.scheduled.compareAndSet(false, true)) { -+ if (this.hasLightWork() && this.scheduled.compareAndSet(false, true)) { // Paper // Paper - rewrite light engine - this.taskMailbox.tell(() -> { - this.runUpdate(); - this.scheduled.set(false); -@@ -201,7 +394,7 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl - } - - objectListIterator.back(j); -- super.runLightUpdates(); -+ this.theLightEngine.propagateChanges(); // Paper - rewrite light engine - - for (int var5 = 0; objectListIterator.hasNext() && var5 < i; var5++) { - Pair pair2 = objectListIterator.next(); -diff --git a/src/main/java/net/minecraft/server/level/TicketType.java b/src/main/java/net/minecraft/server/level/TicketType.java -index 0d536d72ac918fbd403397ff369d10143ee9c204..6051e5f272838ef23276a90e21c2fc821ca155d1 100644 ---- a/src/main/java/net/minecraft/server/level/TicketType.java -+++ b/src/main/java/net/minecraft/server/level/TicketType.java -@@ -26,6 +26,7 @@ public class TicketType { - public static final TicketType UNKNOWN = TicketType.create("unknown", Comparator.comparingLong(ChunkPos::toLong), 1); - public static final TicketType PLUGIN = TicketType.create("plugin", (a, b) -> 0); // CraftBukkit - public static final TicketType PLUGIN_TICKET = TicketType.create("plugin_ticket", (plugin1, plugin2) -> plugin1.getClass().getName().compareTo(plugin2.getClass().getName())); // CraftBukkit -+ public static final TicketType CHUNK_RELIGHT = create("light_update", Long::compareTo); // Paper - ensure chunks stay loaded for lighting - - public static TicketType create(String name, Comparator argumentComparator) { - return new TicketType<>(name, argumentComparator, 0L); -diff --git a/src/main/java/net/minecraft/server/level/WorldGenRegion.java b/src/main/java/net/minecraft/server/level/WorldGenRegion.java -index 386fbf79afe91af445f54aeab7d1296d1407a4d8..abbd4140cb4478a34a5185d8555f83d96c04d468 100644 ---- a/src/main/java/net/minecraft/server/level/WorldGenRegion.java -+++ b/src/main/java/net/minecraft/server/level/WorldGenRegion.java -@@ -109,6 +109,27 @@ public class WorldGenRegion implements WorldGenLevel { - } - } - -+ // Paper start - starlight -+ @Override -+ public int getBrightness(final net.minecraft.world.level.LightLayer lightLayer, final BlockPos blockPos) { -+ final ChunkAccess chunk = this.getChunk(blockPos.getX() >> 4, blockPos.getZ() >> 4); -+ if (!chunk.isLightCorrect()) { -+ return 0; -+ } -+ return this.getLightEngine().getLayerListener(lightLayer).getLightValue(blockPos); -+ } -+ -+ -+ @Override -+ public int getRawBrightness(final BlockPos blockPos, final int subtract) { -+ final ChunkAccess chunk = this.getChunk(blockPos.getX() >> 4, blockPos.getZ() >> 4); -+ if (!chunk.isLightCorrect()) { -+ return 0; -+ } -+ return this.getLightEngine().getRawBrightness(blockPos, subtract); -+ } -+ // Paper end - starlight -+ - public boolean isOldChunkAround(ChunkPos chunkPos, int checkRadius) { - return this.level.getChunkSource().chunkMap.isOldChunkAround(chunkPos, checkRadius); - } -diff --git a/src/main/java/net/minecraft/world/level/block/state/BlockBehaviour.java b/src/main/java/net/minecraft/world/level/block/state/BlockBehaviour.java -index f87d9cb38caf3bf92fd32f2118f76799ede418db..c7da359c525522b55763e594a1db0c26a026b73f 100644 ---- a/src/main/java/net/minecraft/world/level/block/state/BlockBehaviour.java -+++ b/src/main/java/net/minecraft/world/level/block/state/BlockBehaviour.java -@@ -812,6 +812,7 @@ public abstract class BlockBehaviour implements FeatureElement { - this.spawnTerrainParticles = blockbase_info.spawnTerrainParticles; - this.instrument = blockbase_info.instrument; - this.replaceable = blockbase_info.replaceable; -+ this.conditionallyFullOpaque = this.canOcclude & this.useShapeForLightOcclusion; // Paper - } - // Paper start - Perf: impl cached craft block data, lazy load to fix issue with loading at the wrong time - private org.bukkit.craftbukkit.block.data.CraftBlockData cachedCraftBlockData; -@@ -848,6 +849,18 @@ public abstract class BlockBehaviour implements FeatureElement { - return this.shapeExceedsCube; - } - // Paper end -+ // Paper start - starlight -+ protected int opacityIfCached = -1; -+ // ret -1 if opacity is dynamic, or -1 if the block is conditionally full opaque, else return opacity in [0, 15] -+ public final int getOpacityIfCached() { -+ return this.opacityIfCached; -+ } -+ -+ protected final boolean conditionallyFullOpaque; -+ public final boolean isConditionallyFullOpaque() { -+ return this.conditionallyFullOpaque; -+ } -+ // Paper end - starlight - - public void initCache() { - this.fluidState = ((Block) this.owner).getFluidState(this.asState()); -@@ -856,6 +869,7 @@ public abstract class BlockBehaviour implements FeatureElement { - this.cache = new BlockBehaviour.BlockStateBase.Cache(this.asState()); - } - this.shapeExceedsCube = this.cache == null || this.cache.largeCollisionShape; // Paper - moved from actual method to here -+ this.opacityIfCached = this.cache == null || this.isConditionallyFullOpaque() ? -1 : this.cache.lightBlock; // Paper - starlight - cache opacity for light - - this.legacySolid = this.calculateSolid(); - } -diff --git a/src/main/java/net/minecraft/world/level/chunk/ChunkAccess.java b/src/main/java/net/minecraft/world/level/chunk/ChunkAccess.java -index f4e3bd2ae4f63e6d3d25463a3635b8f89fecc068..1f8c72b6c7d8683d67880fa175843c73b3d39b78 100644 ---- a/src/main/java/net/minecraft/world/level/chunk/ChunkAccess.java -+++ b/src/main/java/net/minecraft/world/level/chunk/ChunkAccess.java -@@ -77,7 +77,7 @@ public abstract class ChunkAccess implements BlockGetter, BiomeManager.NoiseBiom - @Nullable - protected BlendingData blendingData; - public final Map heightmaps = Maps.newEnumMap(Heightmap.Types.class); -- protected ChunkSkyLightSources skyLightSources; -+ // Paper - starlight - remove skyLightSources - private final Map structureStarts = Maps.newHashMap(); - private final Map structuresRefences = Maps.newHashMap(); - protected final Map pendingBlockEntities = Maps.newHashMap(); -@@ -89,8 +89,55 @@ public abstract class ChunkAccess implements BlockGetter, BiomeManager.NoiseBiom - private static final org.bukkit.craftbukkit.persistence.CraftPersistentDataTypeRegistry DATA_TYPE_REGISTRY = new org.bukkit.craftbukkit.persistence.CraftPersistentDataTypeRegistry(); - public org.bukkit.craftbukkit.persistence.DirtyCraftPersistentDataContainer persistentDataContainer = new org.bukkit.craftbukkit.persistence.DirtyCraftPersistentDataContainer(ChunkAccess.DATA_TYPE_REGISTRY); - // CraftBukkit end -+ // Paper start - rewrite light engine -+ private volatile ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] blockNibbles; -+ -+ private volatile ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] skyNibbles; -+ -+ private volatile boolean[] skyEmptinessMap; -+ -+ private volatile boolean[] blockEmptinessMap; -+ -+ public ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] getBlockNibbles() { -+ return this.blockNibbles; -+ } -+ -+ public void setBlockNibbles(final ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] nibbles) { -+ this.blockNibbles = nibbles; -+ } -+ -+ public ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] getSkyNibbles() { -+ return this.skyNibbles; -+ } -+ -+ public void setSkyNibbles(final ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] nibbles) { -+ this.skyNibbles = nibbles; -+ } -+ -+ public boolean[] getSkyEmptinessMap() { -+ return this.skyEmptinessMap; -+ } -+ -+ public void setSkyEmptinessMap(final boolean[] emptinessMap) { -+ this.skyEmptinessMap = emptinessMap; -+ } -+ -+ public boolean[] getBlockEmptinessMap() { -+ return this.blockEmptinessMap; -+ } -+ -+ public void setBlockEmptinessMap(final boolean[] emptinessMap) { -+ this.blockEmptinessMap = emptinessMap; -+ } -+ // Paper end - rewrite light engine - - public ChunkAccess(ChunkPos pos, UpgradeData upgradeData, LevelHeightAccessor heightLimitView, Registry biomeRegistry, long inhabitedTime, @Nullable LevelChunkSection[] sectionArray, @Nullable BlendingData blendingData) { -+ // Paper start - rewrite light engine -+ if (!(this instanceof ImposterProtoChunk)) { -+ this.setBlockNibbles(ca.spottedleaf.starlight.common.light.StarLightEngine.getFilledEmptyLight(heightLimitView)); -+ this.setSkyNibbles(ca.spottedleaf.starlight.common.light.StarLightEngine.getFilledEmptyLight(heightLimitView)); -+ } -+ // Paper end - rewrite light engine - this.locX = pos.x; this.locZ = pos.z; // Paper - reduce need for field lookups - this.chunkPos = pos; this.coordinateKey = ChunkPos.asLong(locX, locZ); // Paper - cache long key - this.upgradeData = upgradeData; -@@ -99,7 +146,7 @@ public abstract class ChunkAccess implements BlockGetter, BiomeManager.NoiseBiom - this.inhabitedTime = inhabitedTime; - this.postProcessing = new ShortList[heightLimitView.getSectionsCount()]; - this.blendingData = blendingData; -- this.skyLightSources = new ChunkSkyLightSources(heightLimitView); -+ // Paper - starlight - remove skyLightSources - if (sectionArray != null) { - if (this.sections.length == sectionArray.length) { - System.arraycopy(sectionArray, 0, this.sections, 0, this.sections.length); -@@ -510,12 +557,12 @@ public abstract class ChunkAccess implements BlockGetter, BiomeManager.NoiseBiom - } - - public void initializeLightSources() { -- this.skyLightSources.fillFrom(this); -+ // Paper - starlight - remove skyLightSources - } - - @Override - public ChunkSkyLightSources getSkyLightSources() { -- return this.skyLightSources; -+ return null; // Paper - starlight - remove skyLightSources - } - - public static record TicksToSave(SerializableTickContainer blocks, SerializableTickContainer fluids) { -diff --git a/src/main/java/net/minecraft/world/level/chunk/EmptyLevelChunk.java b/src/main/java/net/minecraft/world/level/chunk/EmptyLevelChunk.java -index 2ee1658532cb00d7bcd1d11e03f19d21ca7f2a9e..ac754827172a4de600d0a57a7d11853481a2dbf2 100644 ---- a/src/main/java/net/minecraft/world/level/chunk/EmptyLevelChunk.java -+++ b/src/main/java/net/minecraft/world/level/chunk/EmptyLevelChunk.java -@@ -21,6 +21,40 @@ public class EmptyLevelChunk extends LevelChunk { - this.biome = biomeEntry; - } - -+ // Paper start - starlight -+ @Override -+ public ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] getBlockNibbles() { -+ return ca.spottedleaf.starlight.common.light.StarLightEngine.getFilledEmptyLight(this.getLevel()); -+ } -+ -+ @Override -+ public void setBlockNibbles(final ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] nibbles) {} -+ -+ @Override -+ public ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] getSkyNibbles() { -+ return ca.spottedleaf.starlight.common.light.StarLightEngine.getFilledEmptyLight(this.getLevel()); -+ } -+ -+ @Override -+ public void setSkyNibbles(final ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] nibbles) {} -+ -+ @Override -+ public boolean[] getSkyEmptinessMap() { -+ return null; -+ } -+ -+ @Override -+ public void setSkyEmptinessMap(final boolean[] emptinessMap) {} -+ -+ @Override -+ public boolean[] getBlockEmptinessMap() { -+ return null; -+ } -+ -+ @Override -+ public void setBlockEmptinessMap(final boolean[] emptinessMap) {} -+ // Paper end - starlight -+ - @Override - public BlockState getBlockState(BlockPos pos) { - return Blocks.VOID_AIR.defaultBlockState(); -diff --git a/src/main/java/net/minecraft/world/level/chunk/ImposterProtoChunk.java b/src/main/java/net/minecraft/world/level/chunk/ImposterProtoChunk.java -index 2953e93965aa688be8fc1620580701ba0c9d907e..aa5dee839d4c0dbc3c2abee9b501ec250c575cb3 100644 ---- a/src/main/java/net/minecraft/world/level/chunk/ImposterProtoChunk.java -+++ b/src/main/java/net/minecraft/world/level/chunk/ImposterProtoChunk.java -@@ -47,6 +47,48 @@ public class ImposterProtoChunk extends ProtoChunk { - this.allowWrites = propagateToWrapped; - } - -+ // Paper start - rewrite light engine -+ @Override -+ public ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] getBlockNibbles() { -+ return this.wrapped.getBlockNibbles(); -+ } -+ -+ @Override -+ public void setBlockNibbles(final ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] nibbles) { -+ this.wrapped.setBlockNibbles(nibbles); -+ } -+ -+ @Override -+ public ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] getSkyNibbles() { -+ return this.wrapped.getSkyNibbles(); -+ } -+ -+ @Override -+ public void setSkyNibbles(final ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] nibbles) { -+ this.wrapped.setSkyNibbles(nibbles); -+ } -+ -+ @Override -+ public boolean[] getSkyEmptinessMap() { -+ return this.wrapped.getSkyEmptinessMap(); -+ } -+ -+ @Override -+ public void setSkyEmptinessMap(final boolean[] emptinessMap) { -+ this.wrapped.setSkyEmptinessMap(emptinessMap); -+ } -+ -+ @Override -+ public boolean[] getBlockEmptinessMap() { -+ return this.wrapped.getBlockEmptinessMap(); -+ } -+ -+ @Override -+ public void setBlockEmptinessMap(final boolean[] emptinessMap) { -+ this.wrapped.setBlockEmptinessMap(emptinessMap); -+ } -+ // Paper end - rewrite light engine -+ - @Nullable - @Override - public BlockEntity getBlockEntity(BlockPos pos) { -diff --git a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java -index 8de6ad8b131061b2dae440dff71e2e6e7af2de39..bac191f92ea3735df19c68d5568c2c7962c8680f 100644 ---- a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java -+++ b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java -@@ -222,6 +222,12 @@ public class LevelChunk extends ChunkAccess { - - public LevelChunk(ServerLevel world, ProtoChunk protoChunk, @Nullable LevelChunk.PostLoadProcessor entityLoader) { - this(world, protoChunk.getPos(), protoChunk.getUpgradeData(), protoChunk.unpackBlockTicks(), protoChunk.unpackFluidTicks(), protoChunk.getInhabitedTime(), protoChunk.getSections(), entityLoader, protoChunk.getBlendingData()); -+ // Paper start - rewrite light engine -+ this.setBlockNibbles(protoChunk.getBlockNibbles()); -+ this.setSkyNibbles(protoChunk.getSkyNibbles()); -+ this.setSkyEmptinessMap(protoChunk.getSkyEmptinessMap()); -+ this.setBlockEmptinessMap(protoChunk.getBlockEmptinessMap()); -+ // Paper end - rewrite light engine - Iterator iterator = protoChunk.getBlockEntities().values().iterator(); - - while (iterator.hasNext()) { -@@ -248,7 +254,7 @@ public class LevelChunk extends ChunkAccess { - } - } - -- this.skyLightSources = protoChunk.skyLightSources; -+ // Paper - starlight - remove skyLightSources - this.setLightCorrect(protoChunk.isLightCorrect()); - this.unsaved = true; - this.needsDecoration = true; // CraftBukkit -@@ -437,7 +443,7 @@ public class LevelChunk extends ChunkAccess { - ProfilerFiller gameprofilerfiller = this.level.getProfiler(); - - gameprofilerfiller.push("updateSkyLightSources"); -- this.skyLightSources.update(this, j, i, l); -+ // Paper - starlight - remove skyLightSources - gameprofilerfiller.popPush("queueCheckLight"); - this.level.getChunkSource().getLightEngine().checkBlock(blockposition); - gameprofilerfiller.pop(); -diff --git a/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java b/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java -index 2fa0097a9374a89177e4f1068d1bfed30b8ff122..fa9df6ebcd90d4e9e5836a37212b1f60665783b1 100644 ---- a/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java -+++ b/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java -@@ -155,7 +155,7 @@ public class PalettedContainer implements PaletteResize, PalettedContainer - return this.get(this.strategy.getIndex(x, y, z)); - } - -- protected T get(int index) { -+ public T get(int index) { // Paper - public - PalettedContainer.Data data = this.data; - return data.palette.valueFor(data.storage.get(index)); - } -diff --git a/src/main/java/net/minecraft/world/level/chunk/ProtoChunk.java b/src/main/java/net/minecraft/world/level/chunk/ProtoChunk.java -index bcc70883d23d38c408130ffe778205e371ff4e8a..576ae0cb138b265c8a3995de7b5ebc827d50949d 100644 ---- a/src/main/java/net/minecraft/world/level/chunk/ProtoChunk.java -+++ b/src/main/java/net/minecraft/world/level/chunk/ProtoChunk.java -@@ -143,7 +143,7 @@ public class ProtoChunk extends ChunkAccess { - } - - if (LightEngine.hasDifferentLightProperties(this, pos, blockState, state)) { -- this.skyLightSources.update(this, m, j, o); -+ // Paper - starlight - remove skyLightSources - this.lightEngine.checkBlock(pos); - } - } -diff --git a/src/main/java/net/minecraft/world/level/chunk/status/ChunkStatus.java b/src/main/java/net/minecraft/world/level/chunk/status/ChunkStatus.java -index ae992aeb8b836e8c2e5bab338ae46cc31c317245..95318092f8281d98132d1d3ceb4a5c36cf32eb05 100644 ---- a/src/main/java/net/minecraft/world/level/chunk/status/ChunkStatus.java -+++ b/src/main/java/net/minecraft/world/level/chunk/status/ChunkStatus.java -@@ -117,6 +117,18 @@ public class ChunkStatus { - private final ChunkType chunkType; - private final EnumSet heightmapsAfter; - -+ // Paper start - starlight -+ public static ChunkStatus getStatus(String name) { -+ try { -+ // We need this otherwise we return EMPTY for invalid names -+ ResourceLocation key = new ResourceLocation(name); -+ return BuiltInRegistries.CHUNK_STATUS.getOptional(key).orElse(null); -+ } catch (Exception ex) { -+ return null; // invalid name -+ } -+ } -+ // Paper end - starlight -+ - private static ChunkStatus register( - String id, - @Nullable ChunkStatus previous, -diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java -index 88f0aca2da0e14ed5ec0513944fa0ba28b73b5d1..01d6b8683a9fa30d05b03ebfef8ee2dca4e83a56 100644 ---- a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java -+++ b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java -@@ -90,6 +90,14 @@ public class ChunkSerializer { - private static final int CURRENT_DATA_VERSION = net.minecraft.SharedConstants.getCurrentVersion().getDataVersion().getVersion(); - private static final boolean JUST_CORRUPT_IT = Boolean.getBoolean("Paper.ignoreWorldDataVersion"); - // Paper end - Do not let the server load chunks from newer versions -+ // Paper start - replace light engine impl -+ private static final int STARLIGHT_LIGHT_VERSION = 9; -+ -+ private static final String BLOCKLIGHT_STATE_TAG = "starlight.blocklight_state"; -+ private static final String SKYLIGHT_STATE_TAG = "starlight.skylight_state"; -+ private static final String STARLIGHT_VERSION_TAG = "starlight.light_version"; -+ // Paper end - replace light engine impl -+ - public ChunkSerializer() {} - - // Paper start - guard against serializing mismatching coordinates -@@ -121,19 +129,26 @@ public class ChunkSerializer { - } - - UpgradeData chunkconverter = nbt.contains("UpgradeData", 10) ? new UpgradeData(nbt.getCompound("UpgradeData"), world) : UpgradeData.EMPTY; -- boolean flag = nbt.getBoolean("isLightOn"); -+ boolean flag = getStatus(nbt) != null && getStatus(nbt).isOrAfter(ChunkStatus.LIGHT) && nbt.get("isLightOn") != null && nbt.getInt(STARLIGHT_VERSION_TAG) == STARLIGHT_LIGHT_VERSION; // Paper - ListTag nbttaglist = nbt.getList("sections", 10); - int i = world.getSectionsCount(); - LevelChunkSection[] achunksection = new LevelChunkSection[i]; - boolean flag1 = world.dimensionType().hasSkyLight(); - ServerChunkCache chunkproviderserver = world.getChunkSource(); - LevelLightEngine levellightengine = chunkproviderserver.getLightEngine(); -+ // Paper start -+ ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] blockNibbles = ca.spottedleaf.starlight.common.light.StarLightEngine.getFilledEmptyLight(world); -+ ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] skyNibbles = ca.spottedleaf.starlight.common.light.StarLightEngine.getFilledEmptyLight(world); -+ final int minSection = io.papermc.paper.util.WorldUtil.getMinLightSection(world); -+ final int maxSection = io.papermc.paper.util.WorldUtil.getMaxLightSection(world); -+ boolean canReadSky = world.dimensionType().hasSkyLight(); -+ // Paper end - Registry iregistry = world.registryAccess().registryOrThrow(Registries.BIOME); - Codec>> codec = ChunkSerializer.makeBiomeCodecRW(iregistry); // CraftBukkit - read/write - boolean flag2 = false; - - for (int j = 0; j < nbttaglist.size(); ++j) { -- CompoundTag nbttagcompound1 = nbttaglist.getCompound(j); -+ CompoundTag nbttagcompound1 = nbttaglist.getCompound(j); CompoundTag sectionData = nbttagcompound1; // Paper - byte b0 = nbttagcompound1.getByte("Y"); - int k = world.getSectionIndexFromSectionY(b0); - -@@ -169,19 +184,39 @@ public class ChunkSerializer { - boolean flag3 = nbttagcompound1.contains("BlockLight", 7); - boolean flag4 = flag1 && nbttagcompound1.contains("SkyLight", 7); - -- if (flag3 || flag4) { -- if (!flag2) { -- levellightengine.retainData(chunkPos, true); -- flag2 = true; -- } -- -+ // Paper start - rewrite the light engine -+ if (flag) { -+ try { -+ int y = sectionData.getByte("Y"); -+ // Paper end - rewrite the light engine - if (flag3) { -- levellightengine.queueSectionData(LightLayer.BLOCK, SectionPos.of(chunkPos, b0), new DataLayer(nbttagcompound1.getByteArray("BlockLight"))); -+ // Paper start - rewrite the light engine -+ // this is where our diff is -+ blockNibbles[y - minSection] = new ca.spottedleaf.starlight.common.light.SWMRNibbleArray(sectionData.getByteArray("BlockLight").clone(), sectionData.getInt(BLOCKLIGHT_STATE_TAG)); // clone for data safety -+ } else { -+ blockNibbles[y - minSection] = new ca.spottedleaf.starlight.common.light.SWMRNibbleArray(null, sectionData.getInt(BLOCKLIGHT_STATE_TAG)); -+ // Paper end - rewrite the light engine - } - - if (flag4) { -- levellightengine.queueSectionData(LightLayer.SKY, SectionPos.of(chunkPos, b0), new DataLayer(nbttagcompound1.getByteArray("SkyLight"))); -+ // Paper start - rewrite the light engine -+ // we store under the same key so mod programs editing nbt -+ // can still read the data, hopefully. -+ // however, for compatibility we store chunks as unlit so vanilla -+ // is forced to re-light them if it encounters our data. It's too much of a burden -+ // to try and maintain compatibility with a broken and inferior skylight management system. -+ skyNibbles[y - minSection] = new ca.spottedleaf.starlight.common.light.SWMRNibbleArray(sectionData.getByteArray("SkyLight").clone(), sectionData.getInt(SKYLIGHT_STATE_TAG)); // clone for data safety -+ } else if (flag1) { -+ skyNibbles[y - minSection] = new ca.spottedleaf.starlight.common.light.SWMRNibbleArray(null, sectionData.getInt(SKYLIGHT_STATE_TAG)); -+ // Paper end - rewrite the light engine -+ } -+ -+ // Paper start - rewrite the light engine -+ } catch (Exception ex) { -+ LOGGER.warn("Failed to load light data for chunk " + chunkPos + " in world '" + world.getWorld().getName() + "', light will be regenerated", ex); -+ flag = false; - } -+ // Paper end - rewrite light engine - } - } - -@@ -211,6 +246,8 @@ public class ChunkSerializer { - }, chunkPos); - - object1 = new LevelChunk(world.getLevel(), chunkPos, chunkconverter, levelchunkticks, levelchunkticks1, l, achunksection, ChunkSerializer.postLoadChunk(world, nbt), blendingdata); -+ ((LevelChunk)object1).setBlockNibbles(blockNibbles); // Paper - replace light impl -+ ((LevelChunk)object1).setSkyNibbles(skyNibbles); // Paper - replace light impl - } else { - ProtoChunkTicks protochunkticklist = ProtoChunkTicks.load(nbt.getList("block_ticks", 10), (s) -> { - return BuiltInRegistries.BLOCK.getOptional(ResourceLocation.tryParse(s)); -@@ -219,6 +256,8 @@ public class ChunkSerializer { - return BuiltInRegistries.FLUID.getOptional(ResourceLocation.tryParse(s)); - }, chunkPos); - ProtoChunk protochunk = new ProtoChunk(chunkPos, chunkconverter, achunksection, protochunkticklist, protochunkticklist1, world, iregistry, blendingdata); -+ protochunk.setBlockNibbles(blockNibbles); // Paper - replace light impl -+ protochunk.setSkyNibbles(skyNibbles); // Paper - replace light impl - - object1 = protochunk; - protochunk.setInhabitedTime(l); -@@ -340,6 +379,12 @@ public class ChunkSerializer { - // CraftBukkit end - - public static CompoundTag write(ServerLevel world, ChunkAccess chunk) { -+ // Paper start - rewrite light impl -+ final int minSection = io.papermc.paper.util.WorldUtil.getMinLightSection(world); -+ final int maxSection = io.papermc.paper.util.WorldUtil.getMaxLightSection(world); -+ ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] blockNibbles = chunk.getBlockNibbles(); -+ ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] skyNibbles = chunk.getSkyNibbles(); -+ // Paper end - rewrite light impl - ChunkPos chunkcoordintpair = chunk.getPos(); - CompoundTag nbttagcompound = NbtUtils.addCurrentDataVersion(new CompoundTag()); - -@@ -389,11 +434,14 @@ public class ChunkSerializer { - for (int i = lightenginethreaded.getMinLightSection(); i < lightenginethreaded.getMaxLightSection(); ++i) { - int j = chunk.getSectionIndexFromSectionY(i); - boolean flag1 = j >= 0 && j < achunksection.length; -- DataLayer nibblearray = lightenginethreaded.getLayerListener(LightLayer.BLOCK).getDataLayerData(SectionPos.of(chunkcoordintpair, i)); -- DataLayer nibblearray1 = lightenginethreaded.getLayerListener(LightLayer.SKY).getDataLayerData(SectionPos.of(chunkcoordintpair, i)); -+ // Paper - replace light engine - -- if (flag1 || nibblearray != null || nibblearray1 != null) { -- CompoundTag nbttagcompound1 = new CompoundTag(); -+ // Paper start - replace light engine -+ ca.spottedleaf.starlight.common.light.SWMRNibbleArray.SaveState blockNibble = blockNibbles[i - minSection].getSaveState(); -+ ca.spottedleaf.starlight.common.light.SWMRNibbleArray.SaveState skyNibble = skyNibbles[i - minSection].getSaveState(); -+ if (flag1 || blockNibble != null || skyNibble != null) { -+ // Paper end - replace light engine -+ CompoundTag nbttagcompound1 = new CompoundTag(); CompoundTag section = nbttagcompound1; // Paper - - if (flag1) { - LevelChunkSection chunksection = achunksection[j]; -@@ -402,13 +450,27 @@ public class ChunkSerializer { - nbttagcompound1.put("biomes", (Tag) codec.encodeStart(NbtOps.INSTANCE, chunksection.getBiomes()).getOrThrow()); - } - -- if (nibblearray != null && !nibblearray.isEmpty()) { -- nbttagcompound1.putByteArray("BlockLight", nibblearray.getData()); -+ // Paper start -+ // we store under the same key so mod programs editing nbt -+ // can still read the data, hopefully. -+ // however, for compatibility we store chunks as unlit so vanilla -+ // is forced to re-light them if it encounters our data. It's too much of a burden -+ // to try and maintain compatibility with a broken and inferior skylight management system. -+ -+ if (blockNibble != null) { -+ if (blockNibble.data != null) { -+ section.putByteArray("BlockLight", blockNibble.data); -+ } -+ section.putInt(BLOCKLIGHT_STATE_TAG, blockNibble.state); - } - -- if (nibblearray1 != null && !nibblearray1.isEmpty()) { -- nbttagcompound1.putByteArray("SkyLight", nibblearray1.getData()); -+ if (skyNibble != null) { -+ if (skyNibble.data != null) { -+ section.putByteArray("SkyLight", skyNibble.data); -+ } -+ section.putInt(SKYLIGHT_STATE_TAG, skyNibble.state); - } -+ // Paper end - - if (!nbttagcompound1.isEmpty()) { - nbttagcompound1.putByte("Y", (byte) i); -@@ -419,7 +481,8 @@ public class ChunkSerializer { - - nbttagcompound.put("sections", nbttaglist); - if (flag) { -- nbttagcompound.putBoolean("isLightOn", true); -+ nbttagcompound.putInt(STARLIGHT_VERSION_TAG, STARLIGHT_LIGHT_VERSION); // Paper -+ nbttagcompound.putBoolean("isLightOn", false); // Paper - set to false but still store, this allows us to detect --eraseCache (as eraseCache _removes_) - } - - ListTag nbttaglist1 = new ListTag(); -@@ -493,6 +556,17 @@ public class ChunkSerializer { - })); - } - -+ // Paper start -+ public static @Nullable ChunkStatus getStatus(@Nullable CompoundTag compound) { -+ if (compound == null) { -+ return null; -+ } -+ -+ // Note: Copied from below -+ return ChunkStatus.getStatus(compound.getString("Status")); -+ } -+ // Paper end -+ - public static ChunkType getChunkTypeFromTag(@Nullable CompoundTag nbt) { - return nbt != null ? ChunkStatus.byName(nbt.getString("Status")).getChunkType() : ChunkType.PROTOCHUNK; - } -diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java -index 44ed6bd76fb9e81f6c0d99fe46173685dbbfe2a7..7aee9f6b143c89cf8d65ca55eeda808152b4dd26 100644 ---- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java -+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java -@@ -507,12 +507,7 @@ public class CraftWorld extends CraftRegionAccessor implements World { - } - } - -- for (final ChunkPos pos : chunksToRelight) { -- final ChunkAccess chunk = serverChunkCache.getChunk(pos.x, pos.z, false); -- if (chunk != null) { -- serverChunkCache.getLightEngine().lightChunk(chunk, false); -- } -- } -+ serverChunkCache.getLightEngine().relight(chunksToRelight, pos -> {}, relit -> {}); // Paper - Starlight - - return true; - // Paper end - implement regenerate chunk method diff --git a/patches/removed/1.21/0994-Rewrite-chunk-system.patch b/patches/removed/1.21/0994-Rewrite-chunk-system.patch deleted file mode 100644 index 4df84d014c..0000000000 --- a/patches/removed/1.21/0994-Rewrite-chunk-system.patch +++ /dev/null @@ -1,21846 +0,0 @@ -From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 -From: Spottedleaf -Date: Thu, 11 Mar 2021 02:32:30 -0800 -Subject: [PATCH] Rewrite chunk system - -Rebased patches: - -New player chunk loader system - -Make ChunkStatus.EMPTY not rely on the main thread for completion - -In order to do this, we need to push the POI consistency checks -to a later status. Since FULL is the only other status that -uses the main thread, it can go there. - -The consistency checks are only really for when a desync occurs, -and so that delaying the check only matters when the chunk data -has desync'd. As long as the desync is sorted before the -chunk is full loaded (i.e before setBlock can occur on -a chunk), it should not matter. - -This change is primarily due to behavioural changes -in the chunk task queue brought by region threading - -which is to split the queue into separate regions. As such, -it is required that in order for the sync load to complete -that the region owning the chunk drain and execute the task -while ticking. However, that is not always possible in -region threading. Thus, removing the main thread reliance allows -the chunk to progress without requiring a tick thread. -Specifically, this allows far sync loads (outside of a specific -regions bounds) to occur without issue - namely with structure -searching. - -Increase parallelism for neighbour writing chunk statuses - -Namely, everything after FEATURES. By creating a dependency -chain indicating what chunks are in use, we can safely -schedule completely independent tasks in parallel. This -will allow the chunk system to scale beyond 10 threads -per world. - -Properly cancel chunk load tasks that were not scheduled - -Since the chunk load task was not scheduled, the entity/poi load -task fields will not be set, but the task complete counter -will not be adjusted. Thus, the chunk load task will not complete. - -To resolve this, detect when the entity/poi tasks were not scheduled -and decrement the task complete counter in such cases. - -Mark POI/Entity load tasks as completed before releasing scheduling lock - -It must be marked as completed during that lock hold since the -waiters field is set to null. Thus, any other thread attempting -a cancellation will fail to remove from waiters. Also, any -other thread attempting to cancel may set the completed field -to true which would cause accept() to fail as well. - -Completion was always designed to happen while holding the -scheduling lock to prevent these race conditions. The code -was originally set up to complete while not holding the -scheduling lock to avoid invoking callbacks while holding the -lock, however the access to the completion field was not -considered. - -Resolve this by marking the callback as completed during the -lock, but invoking the accept() function after releasing -the lock. This will prevent any cancellation attempts to be -blocked, and allow the current thread to complete the callback -without any issues. - -Cache whether region files do not exist - -The repeated I/O of creating the directory for the regionfile -or for checking if the file exists can be heavy in -when pushing chunk generation extremely hard - as each chunk gen -request may effectively go through to the I/O thread. - -Use coordinate-based locking to increase chunk system parallelism - -A significant overhead in Folia comes from the chunk system's -locks, the ticket lock and the scheduling lock. The public -test server, which had ~330 players, had signficant performance -problems with these locks: ~80% of the time spent ticking -was _waiting_ for the locks to free. Given that it used -around 15 cores total at peak, this is a complete and utter loss -of potential. - -To address this issue, I have replaced the ticket lock and scheduling -lock with two ReentrantAreaLocks. The ReentrantAreaLock takes a -shift, which is used internally to group positions into sections. -This grouping is neccessary, as the possible radius of area that -needs to be acquired for any given lock usage is up to 64. As such, -the shift is critical to reduce the number of areas required to lock -for any lock operation. Currently, it is set to a shift of 6, which -is identical to the ticket level propagation shift (and, it must be -at least the ticket level propagation shift AND the region shift). - -The chunk system locking changes required a complete rewrite of the -chunk system tick, chunk system unload, and chunk system ticket level -propagation - as all of the previous logic only works with a single -global lock. - -This does introduce two other section shifts: the lock shift, and the -ticket shift. The lock shift is simply what shift the area locks use, -and the ticket shift represents the size of the ticket sections. -Currently, these values are just set to the region shift for simplicity. -However, they are not arbitrary: the lock shift must be at least the size -of the ticket shift and must be at least the size of the region shift. -The ticket shift must also be >= the ceil(log2(max ticket level source)). - -The chunk system's ticket propagator is now global state, instead of -region state. This cleans up the logic for ticket levels significantly, -and removes usage of the region lock in this area, but it also means -that the addition of a ticket no longer creates a region. To alleviate -the side effects of this change, the global tick thread now processes -ticket level updates for each world every tick to guarantee eventual -ticket level processing. The chunk system also provides a hook to -process ticket level changes in a given _section_, so that the -region queue can guarantee that after adding its reference counter -that the region section is created/exists/wont be destroyed. - -The ticket propagator operates by updating the sources in a single ticket -section, and propagating the updates to its 1 radius neighbours. This -allows the ticket updates to occur in parallel or selectively (see above). -Currently, the process ticket level update function operates by -polling from a concurrent queue of sections to update and simply -invoking the single section update logic. This allows the function -to operate completely in parallel, provided the queue is ordered right. -Additionally, this limits the area used in the ticket/scheduling lock -when processing updates, which should massively increase parallelism compared -to before. - -The chunk system ticket addition for expirable ticket types has been modified -to no longer track exact tick deadlines, as this relies on what region the -ticket is in. Instead, the chunk system tracks a map of -lock section -> (chunk coordinate -> expire ticket count) and every ticket -has been changed to have a removeDelay count that is decremented each tick. -Each region searches its own sections to find tickets to try to expire. - -Chunk system unloading has been modified to track unloads by lock section. -The ordering is determined by which section a chunk resides in. -The unload process now removes from unload sections and processes -the full unload stages (1, 2, 3) before moving to the next section, if possible. -This allows the unload logic to only hold one lock section at a time for -each lock, which is a massive parallelism increase. - -In stress testing, these changes lowered the locking overhead to only 5% -from ~70%, which completely fix the original problem as described. - -== AT == -public net.minecraft.server.level.ChunkHolder pos -public net.minecraft.server.level.ChunkMap overworldDataStorage -public-f net.minecraft.world.level.chunk.storage.RegionFileStorage -public net.minecraft.server.level.ChunkMap getPoiManager()Lnet/minecraft/world/entity/ai/village/poi/PoiManager; - -diff --git a/src/main/java/ca/spottedleaf/concurrentutil/lock/ReentrantAreaLock.java b/src/main/java/ca/spottedleaf/concurrentutil/lock/ReentrantAreaLock.java -new file mode 100644 -index 0000000000000000000000000000000000000000..4fd9a0cd8f1e6ae1a97e963dc7731a80bc6fac5b ---- /dev/null -+++ b/src/main/java/ca/spottedleaf/concurrentutil/lock/ReentrantAreaLock.java -@@ -0,0 +1,395 @@ -+package ca.spottedleaf.concurrentutil.lock; -+ -+import ca.spottedleaf.concurrentutil.collection.MultiThreadedQueue; -+import it.unimi.dsi.fastutil.HashCommon; -+import java.util.ArrayList; -+import java.util.List; -+import java.util.concurrent.ConcurrentHashMap; -+import java.util.concurrent.locks.LockSupport; -+ -+public final class ReentrantAreaLock { -+ -+ public final int coordinateShift; -+ -+ // aggressive load factor to reduce contention -+ private final ConcurrentHashMap nodes = new ConcurrentHashMap<>(128, 0.2f); -+ -+ public ReentrantAreaLock(final int coordinateShift) { -+ this.coordinateShift = coordinateShift; -+ } -+ -+ public boolean isHeldByCurrentThread(final int x, final int z) { -+ final Thread currThread = Thread.currentThread(); -+ final int shift = this.coordinateShift; -+ final int sectionX = x >> shift; -+ final int sectionZ = z >> shift; -+ -+ final Coordinate coordinate = new Coordinate(Coordinate.key(sectionX, sectionZ)); -+ final Node node = this.nodes.get(coordinate); -+ -+ return node != null && node.thread == currThread; -+ } -+ -+ public boolean isHeldByCurrentThread(final int centerX, final int centerZ, final int radius) { -+ return this.isHeldByCurrentThread(centerX - radius, centerZ - radius, centerX + radius, centerZ + radius); -+ } -+ -+ public boolean isHeldByCurrentThread(final int fromX, final int fromZ, final int toX, final int toZ) { -+ if (fromX > toX || fromZ > toZ) { -+ throw new IllegalArgumentException(); -+ } -+ -+ final Thread currThread = Thread.currentThread(); -+ final int shift = this.coordinateShift; -+ final int fromSectionX = fromX >> shift; -+ final int fromSectionZ = fromZ >> shift; -+ final int toSectionX = toX >> shift; -+ final int toSectionZ = toZ >> shift; -+ -+ for (int currZ = fromSectionZ; currZ <= toSectionZ; ++currZ) { -+ for (int currX = fromSectionX; currX <= toSectionX; ++currX) { -+ final Coordinate coordinate = new Coordinate(Coordinate.key(currX, currZ)); -+ -+ final Node node = this.nodes.get(coordinate); -+ -+ if (node == null || node.thread != currThread) { -+ return false; -+ } -+ } -+ } -+ -+ return true; -+ } -+ -+ public Node tryLock(final int x, final int z) { -+ return this.tryLock(x, z, x, z); -+ } -+ -+ public Node tryLock(final int centerX, final int centerZ, final int radius) { -+ return this.tryLock(centerX - radius, centerZ - radius, centerX + radius, centerZ + radius); -+ } -+ -+ public Node tryLock(final int fromX, final int fromZ, final int toX, final int toZ) { -+ if (fromX > toX || fromZ > toZ) { -+ throw new IllegalArgumentException(); -+ } -+ -+ final Thread currThread = Thread.currentThread(); -+ final int shift = this.coordinateShift; -+ final int fromSectionX = fromX >> shift; -+ final int fromSectionZ = fromZ >> shift; -+ final int toSectionX = toX >> shift; -+ final int toSectionZ = toZ >> shift; -+ -+ final List areaAffected = new ArrayList<>(); -+ -+ final Node ret = new Node(this, areaAffected, currThread); -+ -+ boolean failed = false; -+ -+ // try to fast acquire area -+ for (int currZ = fromSectionZ; currZ <= toSectionZ; ++currZ) { -+ for (int currX = fromSectionX; currX <= toSectionX; ++currX) { -+ final Coordinate coordinate = new Coordinate(Coordinate.key(currX, currZ)); -+ -+ final Node prev = this.nodes.putIfAbsent(coordinate, ret); -+ -+ if (prev == null) { -+ areaAffected.add(coordinate); -+ continue; -+ } -+ -+ if (prev.thread != currThread) { -+ failed = true; -+ break; -+ } -+ } -+ } -+ -+ if (!failed) { -+ return ret; -+ } -+ -+ // failed, undo logic -+ if (!areaAffected.isEmpty()) { -+ for (int i = 0, len = areaAffected.size(); i < len; ++i) { -+ final Coordinate key = areaAffected.get(i); -+ -+ if (this.nodes.remove(key) != ret) { -+ throw new IllegalStateException(); -+ } -+ } -+ -+ areaAffected.clear(); -+ -+ // since we inserted, we need to drain waiters -+ Thread unpark; -+ while ((unpark = ret.pollOrBlockAdds()) != null) { -+ LockSupport.unpark(unpark); -+ } -+ } -+ -+ return null; -+ } -+ -+ public Node lock(final int x, final int z) { -+ final Thread currThread = Thread.currentThread(); -+ final int shift = this.coordinateShift; -+ final int sectionX = x >> shift; -+ final int sectionZ = z >> shift; -+ -+ final List areaAffected = new ArrayList<>(1); -+ -+ final Node ret = new Node(this, areaAffected, currThread); -+ final Coordinate coordinate = new Coordinate(Coordinate.key(sectionX, sectionZ)); -+ -+ for (long failures = 0L;;) { -+ final Node park; -+ -+ // try to fast acquire area -+ { -+ final Node prev = this.nodes.putIfAbsent(coordinate, ret); -+ -+ if (prev == null) { -+ areaAffected.add(coordinate); -+ return ret; -+ } else if (prev.thread != currThread) { -+ park = prev; -+ } else { -+ // only one node we would want to acquire, and it's owned by this thread already -+ return ret; -+ } -+ } -+ -+ ++failures; -+ -+ if (failures > 128L && park.add(currThread)) { -+ LockSupport.park(); -+ } else { -+ // high contention, spin wait -+ if (failures < 128L) { -+ for (long i = 0; i < failures; ++i) { -+ Thread.onSpinWait(); -+ } -+ failures = failures << 1; -+ } else if (failures < 1_200L) { -+ LockSupport.parkNanos(1_000L); -+ failures = failures + 1L; -+ } else { // scale 0.1ms (100us) per failure -+ Thread.yield(); -+ LockSupport.parkNanos(100_000L * failures); -+ failures = failures + 1L; -+ } -+ } -+ } -+ } -+ -+ public Node lock(final int centerX, final int centerZ, final int radius) { -+ return this.lock(centerX - radius, centerZ - radius, centerX + radius, centerZ + radius); -+ } -+ -+ public Node lock(final int fromX, final int fromZ, final int toX, final int toZ) { -+ if (fromX > toX || fromZ > toZ) { -+ throw new IllegalArgumentException(); -+ } -+ -+ final Thread currThread = Thread.currentThread(); -+ final int shift = this.coordinateShift; -+ final int fromSectionX = fromX >> shift; -+ final int fromSectionZ = fromZ >> shift; -+ final int toSectionX = toX >> shift; -+ final int toSectionZ = toZ >> shift; -+ -+ if (((fromSectionX ^ toSectionX) | (fromSectionZ ^ toSectionZ)) == 0) { -+ return this.lock(fromX, fromZ); -+ } -+ -+ final List areaAffected = new ArrayList<>(); -+ -+ final Node ret = new Node(this, areaAffected, currThread); -+ -+ for (long failures = 0L;;) { -+ Node park = null; -+ boolean addedToArea = false; -+ boolean alreadyOwned = false; -+ boolean allOwned = true; -+ -+ // try to fast acquire area -+ for (int currZ = fromSectionZ; currZ <= toSectionZ; ++currZ) { -+ for (int currX = fromSectionX; currX <= toSectionX; ++currX) { -+ final Coordinate coordinate = new Coordinate(Coordinate.key(currX, currZ)); -+ -+ final Node prev = this.nodes.putIfAbsent(coordinate, ret); -+ -+ if (prev == null) { -+ addedToArea = true; -+ allOwned = false; -+ areaAffected.add(coordinate); -+ continue; -+ } -+ -+ if (prev.thread != currThread) { -+ park = prev; -+ alreadyOwned = true; -+ break; -+ } -+ } -+ } -+ -+ if (park == null) { -+ if (alreadyOwned && !allOwned) { -+ throw new IllegalStateException("Improper lock usage: Should never acquire intersecting areas"); -+ } -+ return ret; -+ } -+ -+ // failed, undo logic -+ if (addedToArea) { -+ for (int i = 0, len = areaAffected.size(); i < len; ++i) { -+ final Coordinate key = areaAffected.get(i); -+ -+ if (this.nodes.remove(key) != ret) { -+ throw new IllegalStateException(); -+ } -+ } -+ -+ areaAffected.clear(); -+ -+ // since we inserted, we need to drain waiters -+ Thread unpark; -+ while ((unpark = ret.pollOrBlockAdds()) != null) { -+ LockSupport.unpark(unpark); -+ } -+ } -+ -+ ++failures; -+ -+ if (failures > 128L && park.add(currThread)) { -+ LockSupport.park(park); -+ } else { -+ // high contention, spin wait -+ if (failures < 128L) { -+ for (long i = 0; i < failures; ++i) { -+ Thread.onSpinWait(); -+ } -+ failures = failures << 1; -+ } else if (failures < 1_200L) { -+ LockSupport.parkNanos(1_000L); -+ failures = failures + 1L; -+ } else { // scale 0.1ms (100us) per failure -+ Thread.yield(); -+ LockSupport.parkNanos(100_000L * failures); -+ failures = failures + 1L; -+ } -+ } -+ -+ if (addedToArea) { -+ // try again, so we need to allow adds so that other threads can properly block on us -+ ret.allowAdds(); -+ } -+ } -+ } -+ -+ public void unlock(final Node node) { -+ if (node.lock != this) { -+ throw new IllegalStateException("Unlock target lock mismatch"); -+ } -+ -+ final List areaAffected = node.areaAffected; -+ -+ if (areaAffected.isEmpty()) { -+ // here we are not in the node map, and so do not need to remove from the node map or unblock any waiters -+ return; -+ } -+ -+ // remove from node map; allowing other threads to lock -+ for (int i = 0, len = areaAffected.size(); i < len; ++i) { -+ final Coordinate coordinate = areaAffected.get(i); -+ if (this.nodes.remove(coordinate) != node) { -+ throw new IllegalStateException(); -+ } -+ } -+ -+ Thread unpark; -+ while ((unpark = node.pollOrBlockAdds()) != null) { -+ LockSupport.unpark(unpark); -+ } -+ } -+ -+ public static final class Node extends MultiThreadedQueue { -+ -+ private final ReentrantAreaLock lock; -+ private final List areaAffected; -+ private final Thread thread; -+ //private final Throwable WHO_CREATED_MY_ASS = new Throwable(); -+ -+ private Node(final ReentrantAreaLock lock, final List areaAffected, final Thread thread) { -+ this.lock = lock; -+ this.areaAffected = areaAffected; -+ this.thread = thread; -+ } -+ -+ @Override -+ public String toString() { -+ return "Node{" + -+ "areaAffected=" + this.areaAffected + -+ ", thread=" + this.thread + -+ '}'; -+ } -+ } -+ -+ private static final class Coordinate implements Comparable { -+ -+ public final long key; -+ -+ public Coordinate(final long key) { -+ this.key = key; -+ } -+ -+ public Coordinate(final int x, final int z) { -+ this.key = key(x, z); -+ } -+ -+ public static long key(final int x, final int z) { -+ return ((long)z << 32) | (x & 0xFFFFFFFFL); -+ } -+ -+ public static int x(final long key) { -+ return (int)key; -+ } -+ -+ public static int z(final long key) { -+ return (int)(key >>> 32); -+ } -+ -+ @Override -+ public int hashCode() { -+ return (int)HashCommon.mix(this.key); -+ } -+ -+ @Override -+ public boolean equals(final Object obj) { -+ if (this == obj) { -+ return true; -+ } -+ -+ if (!(obj instanceof Coordinate other)) { -+ return false; -+ } -+ -+ return this.key == other.key; -+ } -+ -+ // This class is intended for HashMap/ConcurrentHashMap usage, which do treeify bin nodes if the chain -+ // is too large. So we should implement compareTo to help. -+ @Override -+ public int compareTo(final Coordinate other) { -+ return Long.compare(this.key, other.key); -+ } -+ -+ @Override -+ public String toString() { -+ return "[" + x(this.key) + "," + z(this.key) + "]"; -+ } -+ } -+} -diff --git a/src/main/java/ca/spottedleaf/concurrentutil/lock/SyncReentrantAreaLock.java b/src/main/java/ca/spottedleaf/concurrentutil/lock/SyncReentrantAreaLock.java -new file mode 100644 -index 0000000000000000000000000000000000000000..64b5803d002b2968841a5ddee987f98b72964e87 ---- /dev/null -+++ b/src/main/java/ca/spottedleaf/concurrentutil/lock/SyncReentrantAreaLock.java -@@ -0,0 +1,217 @@ -+package ca.spottedleaf.concurrentutil.lock; -+ -+import ca.spottedleaf.concurrentutil.collection.MultiThreadedQueue; -+import it.unimi.dsi.fastutil.longs.Long2ReferenceOpenHashMap; -+import it.unimi.dsi.fastutil.longs.LongArrayList; -+import java.util.concurrent.locks.LockSupport; -+ -+// not concurrent, unlike ReentrantAreaLock -+// no incorrect lock usage detection (acquiring intersecting areas) -+// this class is nothing more than a performance reference for ReentrantAreaLock -+public final class SyncReentrantAreaLock { -+ -+ private final int coordinateShift; -+ -+ // aggressive load factor to reduce contention -+ private final Long2ReferenceOpenHashMap nodes = new Long2ReferenceOpenHashMap<>(128, 0.2f); -+ -+ public SyncReentrantAreaLock(final int coordinateShift) { -+ this.coordinateShift = coordinateShift; -+ } -+ -+ private static long key(final int x, final int z) { -+ return ((long)z << 32) | (x & 0xFFFFFFFFL); -+ } -+ -+ public Node lock(final int x, final int z) { -+ final Thread currThread = Thread.currentThread(); -+ final int shift = this.coordinateShift; -+ final int sectionX = x >> shift; -+ final int sectionZ = z >> shift; -+ -+ final LongArrayList areaAffected = new LongArrayList(); -+ -+ final Node ret = new Node(this, areaAffected, currThread); -+ -+ final long coordinate = key(sectionX, sectionZ); -+ -+ for (long failures = 0L;;) { -+ final Node park; -+ -+ synchronized (this) { -+ // try to fast acquire area -+ final Node prev = this.nodes.putIfAbsent(coordinate, ret); -+ -+ if (prev == null) { -+ areaAffected.add(coordinate); -+ return ret; -+ } else if (prev.thread != currThread) { -+ park = prev; -+ } else { -+ // only one node we would want to acquire, and it's owned by this thread already -+ return ret; -+ } -+ } -+ -+ ++failures; -+ -+ if (failures > 128L && park.add(currThread)) { -+ LockSupport.park(); -+ } else { -+ // high contention, spin wait -+ if (failures < 128L) { -+ for (long i = 0; i < failures; ++i) { -+ Thread.onSpinWait(); -+ } -+ failures = failures << 1; -+ } else if (failures < 1_200L) { -+ LockSupport.parkNanos(1_000L); -+ failures = failures + 1L; -+ } else { // scale 0.1ms (100us) per failure -+ Thread.yield(); -+ LockSupport.parkNanos(100_000L * failures); -+ failures = failures + 1L; -+ } -+ } -+ } -+ } -+ -+ public Node lock(final int centerX, final int centerZ, final int radius) { -+ return this.lock(centerX - radius, centerZ - radius, centerX + radius, centerZ + radius); -+ } -+ -+ public Node lock(final int fromX, final int fromZ, final int toX, final int toZ) { -+ if (fromX > toX || fromZ > toZ) { -+ throw new IllegalArgumentException(); -+ } -+ -+ final Thread currThread = Thread.currentThread(); -+ final int shift = this.coordinateShift; -+ final int fromSectionX = fromX >> shift; -+ final int fromSectionZ = fromZ >> shift; -+ final int toSectionX = toX >> shift; -+ final int toSectionZ = toZ >> shift; -+ -+ final LongArrayList areaAffected = new LongArrayList(); -+ -+ final Node ret = new Node(this, areaAffected, currThread); -+ -+ for (long failures = 0L;;) { -+ Node park = null; -+ boolean addedToArea = false; -+ -+ synchronized (this) { -+ // try to fast acquire area -+ for (int currZ = fromSectionZ; currZ <= toSectionZ; ++currZ) { -+ for (int currX = fromSectionX; currX <= toSectionX; ++currX) { -+ final long coordinate = key(currX, currZ); -+ -+ final Node prev = this.nodes.putIfAbsent(coordinate, ret); -+ -+ if (prev == null) { -+ addedToArea = true; -+ areaAffected.add(coordinate); -+ continue; -+ } -+ -+ if (prev.thread != currThread) { -+ park = prev; -+ break; -+ } -+ } -+ } -+ -+ if (park == null) { -+ return ret; -+ } -+ -+ // failed, undo logic -+ if (!areaAffected.isEmpty()) { -+ for (int i = 0, len = areaAffected.size(); i < len; ++i) { -+ final long key = areaAffected.getLong(i); -+ -+ if (!this.nodes.remove(key, ret)) { -+ throw new IllegalStateException(); -+ } -+ } -+ } -+ } -+ -+ if (addedToArea) { -+ areaAffected.clear(); -+ // since we inserted, we need to drain waiters -+ Thread unpark; -+ while ((unpark = ret.pollOrBlockAdds()) != null) { -+ LockSupport.unpark(unpark); -+ } -+ } -+ -+ ++failures; -+ -+ if (failures > 128L && park.add(currThread)) { -+ LockSupport.park(); -+ } else { -+ // high contention, spin wait -+ if (failures < 128L) { -+ for (long i = 0; i < failures; ++i) { -+ Thread.onSpinWait(); -+ } -+ failures = failures << 1; -+ } else if (failures < 1_200L) { -+ LockSupport.parkNanos(1_000L); -+ failures = failures + 1L; -+ } else { // scale 0.1ms (100us) per failure -+ Thread.yield(); -+ LockSupport.parkNanos(100_000L * failures); -+ failures = failures + 1L; -+ } -+ } -+ -+ if (addedToArea) { -+ // try again, so we need to allow adds so that other threads can properly block on us -+ ret.allowAdds(); -+ } -+ } -+ } -+ -+ public void unlock(final Node node) { -+ if (node.lock != this) { -+ throw new IllegalStateException("Unlock target lock mismatch"); -+ } -+ -+ final LongArrayList areaAffected = node.areaAffected; -+ -+ if (areaAffected.isEmpty()) { -+ // here we are not in the node map, and so do not need to remove from the node map or unblock any waiters -+ return; -+ } -+ -+ // remove from node map; allowing other threads to lock -+ synchronized (this) { -+ for (int i = 0, len = areaAffected.size(); i < len; ++i) { -+ final long coordinate = areaAffected.getLong(i); -+ if (!this.nodes.remove(coordinate, node)) { -+ throw new IllegalStateException(); -+ } -+ } -+ } -+ -+ Thread unpark; -+ while ((unpark = node.pollOrBlockAdds()) != null) { -+ LockSupport.unpark(unpark); -+ } -+ } -+ -+ public static final class Node extends MultiThreadedQueue { -+ -+ private final SyncReentrantAreaLock lock; -+ private final LongArrayList areaAffected; -+ private final Thread thread; -+ -+ private Node(final SyncReentrantAreaLock lock, final LongArrayList areaAffected, final Thread thread) { -+ this.lock = lock; -+ this.areaAffected = areaAffected; -+ this.thread = thread; -+ } -+ } -+} -diff --git a/src/main/java/ca/spottedleaf/starlight/common/light/StarLightInterface.java b/src/main/java/ca/spottedleaf/starlight/common/light/StarLightInterface.java -index e0338db4d6fa359029ed5edeacc3646aa98701f5..c03dbb4a74d00d794be4139f0f7c4b5ff1b01d38 100644 ---- a/src/main/java/ca/spottedleaf/starlight/common/light/StarLightInterface.java -+++ b/src/main/java/ca/spottedleaf/starlight/common/light/StarLightInterface.java -@@ -41,14 +41,14 @@ public final class StarLightInterface { - protected final ArrayDeque cachedSkyPropagators; - protected final ArrayDeque cachedBlockPropagators; - -- protected final LightQueue lightQueue = new LightQueue(this); -+ public final io.papermc.paper.chunk.system.light.LightQueue lightQueue; // Paper - replace light queue - - protected final LayerLightEventListener skyReader; - protected final LayerLightEventListener blockReader; - protected final boolean isClientSide; - -- protected final int minSection; -- protected final int maxSection; -+ public final int minSection; // Paper - public -+ public final int maxSection; // Paper - public - protected final int minLightSection; - protected final int maxLightSection; - -@@ -182,6 +182,7 @@ public final class StarLightInterface { - StarLightInterface.this.sectionChange(pos, notReady); - } - }; -+ this.lightQueue = new io.papermc.paper.chunk.system.light.LightQueue(this); // Paper - replace light queue - } - - public boolean hasSkyLight() { -@@ -333,7 +334,7 @@ public final class StarLightInterface { - return this.lightAccess; - } - -- protected final SkyStarLightEngine getSkyLightEngine() { -+ public final SkyStarLightEngine getSkyLightEngine() { // Paper - public - if (this.cachedSkyPropagators == null) { - return null; - } -@@ -348,7 +349,7 @@ public final class StarLightInterface { - return ret; - } - -- protected final void releaseSkyLightEngine(final SkyStarLightEngine engine) { -+ public final void releaseSkyLightEngine(final SkyStarLightEngine engine) { // Paper - public - if (this.cachedSkyPropagators == null) { - return; - } -@@ -357,7 +358,7 @@ public final class StarLightInterface { - } - } - -- protected final BlockStarLightEngine getBlockLightEngine() { -+ public final BlockStarLightEngine getBlockLightEngine() { // Paper - public - if (this.cachedBlockPropagators == null) { - return null; - } -@@ -372,7 +373,7 @@ public final class StarLightInterface { - return ret; - } - -- protected final void releaseBlockLightEngine(final BlockStarLightEngine engine) { -+ public final void releaseBlockLightEngine(final BlockStarLightEngine engine) { // Paper - public - if (this.cachedBlockPropagators == null) { - return; - } -@@ -381,7 +382,7 @@ public final class StarLightInterface { - } - } - -- public LightQueue.ChunkTasks blockChange(final BlockPos pos) { -+ public io.papermc.paper.chunk.system.light.LightQueue.ChunkTasks blockChange(final BlockPos pos) { // Paper - rewrite chunk system - if (this.world == null || pos.getY() < WorldUtil.getMinBlockY(this.world) || pos.getY() > WorldUtil.getMaxBlockY(this.world)) { // empty world - return null; - } -@@ -389,7 +390,7 @@ public final class StarLightInterface { - return this.lightQueue.queueBlockChange(pos); - } - -- public LightQueue.ChunkTasks sectionChange(final SectionPos pos, final boolean newEmptyValue) { -+ public io.papermc.paper.chunk.system.light.LightQueue.ChunkTasks sectionChange(final SectionPos pos, final boolean newEmptyValue) { // Paper - rewrite chunk system - if (this.world == null) { // empty world - return null; - } -@@ -519,57 +520,15 @@ public final class StarLightInterface { - } - - public void scheduleChunkLight(final ChunkPos pos, final Runnable run) { -- this.lightQueue.queueChunkLighting(pos, run); -+ throw new UnsupportedOperationException("No longer implemented, use the new lightQueue field to queue tasks"); // Paper - replace light queue - } - - public void removeChunkTasks(final ChunkPos pos) { -- this.lightQueue.removeChunk(pos); -+ throw new UnsupportedOperationException("No longer implemented, use the new lightQueue field to queue tasks"); // Paper - replace light queue - } - - public void propagateChanges() { -- if (this.lightQueue.isEmpty()) { -- return; -- } -- -- final SkyStarLightEngine skyEngine = this.getSkyLightEngine(); -- final BlockStarLightEngine blockEngine = this.getBlockLightEngine(); -- -- try { -- LightQueue.ChunkTasks task; -- while ((task = this.lightQueue.removeFirstTask()) != null) { -- if (task.lightTasks != null) { -- for (final Runnable run : task.lightTasks) { -- run.run(); -- } -- } -- -- final long coordinate = task.chunkCoordinate; -- final int chunkX = CoordinateUtils.getChunkX(coordinate); -- final int chunkZ = CoordinateUtils.getChunkZ(coordinate); -- -- final Set positions = task.changedPositions; -- final Boolean[] sectionChanges = task.changedSectionSet; -- -- if (skyEngine != null && (!positions.isEmpty() || sectionChanges != null)) { -- skyEngine.blocksChangedInChunk(this.lightAccess, chunkX, chunkZ, positions, sectionChanges); -- } -- if (blockEngine != null && (!positions.isEmpty() || sectionChanges != null)) { -- blockEngine.blocksChangedInChunk(this.lightAccess, chunkX, chunkZ, positions, sectionChanges); -- } -- -- if (skyEngine != null && task.queuedEdgeChecksSky != null) { -- skyEngine.checkChunkEdges(this.lightAccess, chunkX, chunkZ, task.queuedEdgeChecksSky); -- } -- if (blockEngine != null && task.queuedEdgeChecksBlock != null) { -- blockEngine.checkChunkEdges(this.lightAccess, chunkX, chunkZ, task.queuedEdgeChecksBlock); -- } -- -- task.onComplete.complete(null); -- } -- } finally { -- this.releaseSkyLightEngine(skyEngine); -- this.releaseBlockLightEngine(blockEngine); -- } -+ throw new UnsupportedOperationException("No longer implemented, task draining is now performed by the light thread"); // Paper - replace light queue - } - - public static final class LightQueue { -diff --git a/src/main/java/co/aikar/timings/WorldTimingsHandler.java b/src/main/java/co/aikar/timings/WorldTimingsHandler.java -index 2f0d9b953802dee821cfde82d22b0567cce8ee91..22687667ec69a954261e55e59261286ac1b8b8cd 100644 ---- a/src/main/java/co/aikar/timings/WorldTimingsHandler.java -+++ b/src/main/java/co/aikar/timings/WorldTimingsHandler.java -@@ -59,6 +59,16 @@ public class WorldTimingsHandler { - - public final Timing miscMobSpawning; - -+ public final Timing poiUnload; -+ public final Timing chunkUnload; -+ public final Timing poiSaveDataSerialization; -+ public final Timing chunkSave; -+ public final Timing chunkSaveDataSerialization; -+ public final Timing chunkSaveIOWait; -+ public final Timing chunkUnloadPrepareSave; -+ public final Timing chunkUnloadPOISerialization; -+ public final Timing chunkUnloadDataSave; -+ - public WorldTimingsHandler(Level server) { - String name = ((PrimaryLevelData) server.getLevelData()).getLevelName() + " - "; - -@@ -112,6 +122,16 @@ public class WorldTimingsHandler { - - - miscMobSpawning = Timings.ofSafe(name + "Mob spawning - Misc"); -+ -+ poiUnload = Timings.ofSafe(name + "Chunk unload - POI"); -+ chunkUnload = Timings.ofSafe(name + "Chunk unload - Chunk"); -+ poiSaveDataSerialization = Timings.ofSafe(name + "Chunk save - POI Data serialization"); -+ chunkSave = Timings.ofSafe(name + "Chunk save - Chunk"); -+ chunkSaveDataSerialization = Timings.ofSafe(name + "Chunk save - Chunk Data serialization"); -+ chunkSaveIOWait = Timings.ofSafe(name + "Chunk save - Chunk IO Wait"); -+ chunkUnloadPrepareSave = Timings.ofSafe(name + "Chunk unload - Async Save Prepare"); -+ chunkUnloadPOISerialization = Timings.ofSafe(name + "Chunk unload - POI Data Serialization"); -+ chunkUnloadDataSave = Timings.ofSafe(name + "Chunk unload - Data Serialization"); - } - - public static Timing getTickList(ServerLevel worldserver, String timingsType) { -diff --git a/src/main/java/io/papermc/paper/chunk/system/ChunkSystem.java b/src/main/java/io/papermc/paper/chunk/system/ChunkSystem.java -index cff2f04409fab9abca87ceec85a551e1d59f9e7d..e3f56908cc8a9c3f4580def50fcfdc61bd495a71 100644 ---- a/src/main/java/io/papermc/paper/chunk/system/ChunkSystem.java -+++ b/src/main/java/io/papermc/paper/chunk/system/ChunkSystem.java -@@ -32,192 +32,41 @@ public final class ChunkSystem { - } - - public static void scheduleChunkTask(final ServerLevel level, final int chunkX, final int chunkZ, final Runnable run, final PrioritisedExecutor.Priority priority) { -- level.chunkSource.mainThreadProcessor.execute(run); -+ level.chunkTaskScheduler.scheduleChunkTask(chunkX, chunkZ, run, priority); // Paper - rewrite chunk system - } - - public static void scheduleChunkLoad(final ServerLevel level, final int chunkX, final int chunkZ, final boolean gen, - final ChunkStatus toStatus, final boolean addTicket, final PrioritisedExecutor.Priority priority, - final Consumer onComplete) { -- if (gen) { -- scheduleChunkLoad(level, chunkX, chunkZ, toStatus, addTicket, priority, onComplete); -- return; -- } -- scheduleChunkLoad(level, chunkX, chunkZ, ChunkStatus.EMPTY, addTicket, priority, (final ChunkAccess chunk) -> { -- if (chunk == null) { -- onComplete.accept(null); -- } else { -- if (chunk.getStatus().isOrAfter(toStatus)) { -- scheduleChunkLoad(level, chunkX, chunkZ, toStatus, addTicket, priority, onComplete); -- } else { -- onComplete.accept(null); -- } -- } -- }); -+ level.chunkTaskScheduler.scheduleChunkLoad(chunkX, chunkZ, gen, toStatus, addTicket, priority, onComplete); // Paper - rewrite chunk system - } - -- static final TicketType CHUNK_LOAD = TicketType.create("chunk_load", Long::compareTo); -- -- private static long chunkLoadCounter = 0L; -+ // Paper - rewrite chunk system - public static void scheduleChunkLoad(final ServerLevel level, final int chunkX, final int chunkZ, final ChunkStatus toStatus, - final boolean addTicket, final PrioritisedExecutor.Priority priority, final Consumer onComplete) { -- if (!Bukkit.isPrimaryThread()) { -- scheduleChunkTask(level, chunkX, chunkZ, () -> { -- scheduleChunkLoad(level, chunkX, chunkZ, toStatus, addTicket, priority, onComplete); -- }, priority); -- return; -- } -- -- final int minLevel = 33 + ChunkStatus.getDistance(toStatus); -- final Long chunkReference = addTicket ? Long.valueOf(++chunkLoadCounter) : null; -- final ChunkPos chunkPos = new ChunkPos(chunkX, chunkZ); -- -- if (addTicket) { -- level.chunkSource.addTicketAtLevel(CHUNK_LOAD, chunkPos, minLevel, chunkReference); -- } -- level.chunkSource.runDistanceManagerUpdates(); -- -- final Consumer loadCallback = (final ChunkAccess chunk) -> { -- try { -- if (onComplete != null) { -- onComplete.accept(chunk); -- } -- } catch (final ThreadDeath death) { -- throw death; -- } catch (final Throwable thr) { -- LOGGER.error("Exception handling chunk load callback", thr); -- SneakyThrow.sneaky(thr); -- } finally { -- if (addTicket) { -- level.chunkSource.addTicketAtLevel(TicketType.UNKNOWN, chunkPos, minLevel, chunkPos); -- level.chunkSource.removeTicketAtLevel(CHUNK_LOAD, chunkPos, minLevel, chunkReference); -- } -- } -- }; -- -- final ChunkHolder holder = level.chunkSource.chunkMap.updatingChunkMap.get(CoordinateUtils.getChunkKey(chunkX, chunkZ)); -- -- if (holder == null || holder.getTicketLevel() > minLevel) { -- loadCallback.accept(null); -- return; -- } -- -- final CompletableFuture> loadFuture = holder.getOrScheduleFuture(toStatus, level.chunkSource.chunkMap); -- -- if (loadFuture.isDone()) { -- loadCallback.accept(loadFuture.join().left().orElse(null)); -- return; -- } -- -- loadFuture.whenCompleteAsync((final Either either, final Throwable thr) -> { -- if (thr != null) { -- loadCallback.accept(null); -- return; -- } -- loadCallback.accept(either.left().orElse(null)); -- }, (final Runnable r) -> { -- scheduleChunkTask(level, chunkX, chunkZ, r, PrioritisedExecutor.Priority.HIGHEST); -- }); -+ level.chunkTaskScheduler.scheduleChunkLoad(chunkX, chunkZ, toStatus, addTicket, priority, onComplete); // Paper - rewrite chunk system - } - - public static void scheduleTickingState(final ServerLevel level, final int chunkX, final int chunkZ, - final FullChunkStatus toStatus, final boolean addTicket, - final PrioritisedExecutor.Priority priority, final Consumer onComplete) { -- // This method goes unused until the chunk system rewrite -- if (toStatus == FullChunkStatus.INACCESSIBLE) { -- throw new IllegalArgumentException("Cannot wait for INACCESSIBLE status"); -- } -- -- if (!Bukkit.isPrimaryThread()) { -- scheduleChunkTask(level, chunkX, chunkZ, () -> { -- scheduleTickingState(level, chunkX, chunkZ, toStatus, addTicket, priority, onComplete); -- }, priority); -- return; -- } -- -- final int minLevel = 33 - (toStatus.ordinal() - 1); -- final int radius = toStatus.ordinal() - 1; -- final Long chunkReference = addTicket ? Long.valueOf(++chunkLoadCounter) : null; -- final ChunkPos chunkPos = new ChunkPos(chunkX, chunkZ); -- -- if (addTicket) { -- level.chunkSource.addTicketAtLevel(CHUNK_LOAD, chunkPos, minLevel, chunkReference); -- } -- level.chunkSource.runDistanceManagerUpdates(); -- -- final Consumer loadCallback = (final LevelChunk chunk) -> { -- try { -- if (onComplete != null) { -- onComplete.accept(chunk); -- } -- } catch (final ThreadDeath death) { -- throw death; -- } catch (final Throwable thr) { -- LOGGER.error("Exception handling chunk load callback", thr); -- SneakyThrow.sneaky(thr); -- } finally { -- if (addTicket) { -- level.chunkSource.addTicketAtLevel(TicketType.UNKNOWN, chunkPos, minLevel, chunkPos); -- level.chunkSource.removeTicketAtLevel(CHUNK_LOAD, chunkPos, minLevel, chunkReference); -- } -- } -- }; -- -- final ChunkHolder holder = level.chunkSource.chunkMap.updatingChunkMap.get(CoordinateUtils.getChunkKey(chunkX, chunkZ)); -- -- if (holder == null || holder.getTicketLevel() > minLevel) { -- loadCallback.accept(null); -- return; -- } -- -- final CompletableFuture> tickingState; -- switch (toStatus) { -- case FULL: { -- tickingState = holder.getFullChunkFuture(); -- break; -- } -- case BLOCK_TICKING: { -- tickingState = holder.getTickingChunkFuture(); -- break; -- } -- case ENTITY_TICKING: { -- tickingState = holder.getEntityTickingChunkFuture(); -- break; -- } -- default: { -- throw new IllegalStateException("Cannot reach here"); -- } -- } -- -- if (tickingState.isDone()) { -- loadCallback.accept(tickingState.join().left().orElse(null)); -- return; -- } -- -- tickingState.whenCompleteAsync((final Either either, final Throwable thr) -> { -- if (thr != null) { -- loadCallback.accept(null); -- return; -- } -- loadCallback.accept(either.left().orElse(null)); -- }, (final Runnable r) -> { -- scheduleChunkTask(level, chunkX, chunkZ, r, PrioritisedExecutor.Priority.HIGHEST); -- }); -+ level.chunkTaskScheduler.scheduleTickingState(chunkX, chunkZ, toStatus, addTicket, priority, onComplete); // Paper - rewrite chunk system - } - - public static List getVisibleChunkHolders(final ServerLevel level) { -- return new ArrayList<>(level.chunkSource.chunkMap.visibleChunkMap.values()); -+ return level.chunkTaskScheduler.chunkHolderManager.getOldChunkHolders(); // Paper - rewrite chunk system - } - - public static List getUpdatingChunkHolders(final ServerLevel level) { -- return new ArrayList<>(level.chunkSource.chunkMap.updatingChunkMap.values()); -+ return level.chunkTaskScheduler.chunkHolderManager.getOldChunkHolders(); // Paper - rewrite chunk system - } - - public static int getVisibleChunkHolderCount(final ServerLevel level) { -- return level.chunkSource.chunkMap.visibleChunkMap.size(); -+ return level.chunkTaskScheduler.chunkHolderManager.size(); // Paper - rewrite chunk system - } - - public static int getUpdatingChunkHolderCount(final ServerLevel level) { -- return level.chunkSource.chunkMap.updatingChunkMap.size(); -+ return level.chunkTaskScheduler.chunkHolderManager.size(); // Paper - rewrite chunk system - } - - public static boolean hasAnyChunkHolders(final ServerLevel level) { -@@ -244,26 +93,32 @@ public final class ChunkSystem { - - public static void onChunkBorder(final LevelChunk chunk, final ChunkHolder holder) { - chunk.playerChunk = holder; -+ chunk.chunkStatus = net.minecraft.server.level.FullChunkStatus.FULL; - } - - public static void onChunkNotBorder(final LevelChunk chunk, final ChunkHolder holder) { -- -+ chunk.chunkStatus = net.minecraft.server.level.FullChunkStatus.INACCESSIBLE; - } - - public static void onChunkTicking(final LevelChunk chunk, final ChunkHolder holder) { - chunk.level.getChunkSource().tickingChunks.add(chunk); -+ chunk.chunkStatus = net.minecraft.server.level.FullChunkStatus.BLOCK_TICKING; -+ chunk.level.chunkSource.chunkMap.tickingGenerated.incrementAndGet(); - } - - public static void onChunkNotTicking(final LevelChunk chunk, final ChunkHolder holder) { - chunk.level.getChunkSource().tickingChunks.remove(chunk); -+ chunk.chunkStatus = net.minecraft.server.level.FullChunkStatus.FULL; - } - - public static void onChunkEntityTicking(final LevelChunk chunk, final ChunkHolder holder) { - chunk.level.getChunkSource().entityTickingChunks.add(chunk); -+ chunk.chunkStatus = net.minecraft.server.level.FullChunkStatus.ENTITY_TICKING; - } - - public static void onChunkNotEntityTicking(final LevelChunk chunk, final ChunkHolder holder) { - chunk.level.getChunkSource().entityTickingChunks.remove(chunk); -+ chunk.chunkStatus = net.minecraft.server.level.FullChunkStatus.BLOCK_TICKING; - } - - public static ChunkHolder getUnloadingChunkHolder(final ServerLevel level, final int chunkX, final int chunkZ) { -@@ -271,23 +126,15 @@ public final class ChunkSystem { - } - - public static int getSendViewDistance(final ServerPlayer player) { -- return getLoadViewDistance(player); -+ return io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.getAPISendViewDistance(player); - } - - public static int getLoadViewDistance(final ServerPlayer player) { -- final ServerLevel level = player.serverLevel(); -- if (level == null) { -- return Bukkit.getViewDistance(); -- } -- return level.chunkSource.chunkMap.getPlayerViewDistance(player); -+ return io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.getLoadViewDistance(player); - } - - public static int getTickViewDistance(final ServerPlayer player) { -- final ServerLevel level = player.serverLevel(); -- if (level == null) { -- return Bukkit.getSimulationDistance(); -- } -- return level.chunkSource.chunkMap.distanceManager.simulationDistance; -+ return io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.getAPITickViewDistance(player); - } - - private ChunkSystem() { -diff --git a/src/main/java/io/papermc/paper/chunk/system/RegionizedPlayerChunkLoader.java b/src/main/java/io/papermc/paper/chunk/system/RegionizedPlayerChunkLoader.java -new file mode 100644 -index 0000000000000000000000000000000000000000..ee58c67cb2bd78159cce19ec75f13dc6168a0e7a ---- /dev/null -+++ b/src/main/java/io/papermc/paper/chunk/system/RegionizedPlayerChunkLoader.java -@@ -0,0 +1,1375 @@ -+package io.papermc.paper.chunk.system; -+ -+import ca.spottedleaf.concurrentutil.collection.SRSWLinkedQueue; -+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; -+import ca.spottedleaf.concurrentutil.util.ConcurrentUtil; -+import io.papermc.paper.chunk.system.scheduling.ChunkHolderManager; -+import io.papermc.paper.configuration.GlobalConfiguration; -+import io.papermc.paper.util.CoordinateUtils; -+import io.papermc.paper.util.TickThread; -+import io.papermc.paper.util.player.SingleUserAreaMap; -+import it.unimi.dsi.fastutil.longs.Long2ByteOpenHashMap; -+import it.unimi.dsi.fastutil.longs.LongArrayList; -+import it.unimi.dsi.fastutil.longs.LongComparator; -+import it.unimi.dsi.fastutil.longs.LongHeapPriorityQueue; -+import it.unimi.dsi.fastutil.longs.LongIterator; -+import it.unimi.dsi.fastutil.longs.LongLinkedOpenHashSet; -+import it.unimi.dsi.fastutil.longs.LongOpenHashSet; -+import net.minecraft.network.protocol.Packet; -+import net.minecraft.network.protocol.game.ClientboundSetChunkCacheCenterPacket; -+import net.minecraft.network.protocol.game.ClientboundSetChunkCacheRadiusPacket; -+import net.minecraft.network.protocol.game.ClientboundSetSimulationDistancePacket; -+import net.minecraft.server.level.ChunkTrackingView; -+import net.minecraft.server.level.ServerLevel; -+import net.minecraft.server.level.ServerPlayer; -+import net.minecraft.server.level.TicketType; -+import net.minecraft.server.network.PlayerChunkSender; -+import net.minecraft.world.level.ChunkPos; -+import net.minecraft.world.level.GameRules; -+import net.minecraft.world.level.chunk.ChunkAccess; -+import net.minecraft.world.level.chunk.status.ChunkStatus; -+import net.minecraft.world.level.chunk.LevelChunk; -+import net.minecraft.world.level.levelgen.BelowZeroRetrogen; -+import org.bukkit.craftbukkit.entity.CraftPlayer; -+import org.bukkit.entity.Player; -+import java.lang.invoke.VarHandle; -+import java.util.ArrayDeque; -+import java.util.Arrays; -+import java.util.Objects; -+import java.util.concurrent.TimeUnit; -+import java.util.concurrent.atomic.AtomicLong; -+ -+public class RegionizedPlayerChunkLoader { -+ -+ // expected that this list returns for a given radius, the set of chunks ordered -+ // by manhattan distance -+ private static final long[][] SEARCH_RADIUS_ITERATION_LIST = new long[64+2+1][]; -+ static { -+ for (int i = 0; i < SEARCH_RADIUS_ITERATION_LIST.length; ++i) { -+ // a BFS around -x, -z, +x, +z will give increasing manhatten distance -+ SEARCH_RADIUS_ITERATION_LIST[i] = generateBFSOrder(i); -+ } -+ } -+ -+ private static void expandQuadrants(final CustomLongArray input, final int size) { -+ final int len = input.size(); -+ final long[] array = input.elements(); -+ -+ int writeIndex = size - 1; -+ for (int i = len - 1; i >= 0; --i) { -+ final long key = array[i]; -+ final int chunkX = CoordinateUtils.getChunkX(key); -+ final int chunkZ = CoordinateUtils.getChunkZ(key); -+ -+ if ((chunkX | chunkZ) < 0 || (i != 0 && chunkX == 0 && chunkZ == 0)) { -+ throw new IllegalStateException(); -+ } -+ -+ // Q4 -+ if (chunkZ != 0) { -+ array[writeIndex--] = CoordinateUtils.getChunkKey(chunkX, -chunkZ); -+ } -+ // Q3 -+ if (chunkX != 0 && chunkZ != 0) { -+ array[writeIndex--] = CoordinateUtils.getChunkKey(-chunkX, -chunkZ); -+ } -+ // Q2 -+ if (chunkX != 0) { -+ array[writeIndex--] = CoordinateUtils.getChunkKey(-chunkX, chunkZ); -+ } -+ -+ array[writeIndex--] = key; -+ } -+ -+ input.forceSize(size); -+ -+ if (writeIndex != -1) { -+ throw new IllegalStateException(); -+ } -+ } -+ -+ private static long[] generateBFSOrder(final int radius) { -+ // by using only the first quadrant, we can reduce the total element size by 4 when spreading -+ final CustomLongArray[] byDistance = makeQ1BFS(radius); -+ -+ // to increase generation parallelism, we want to space the chunks out so that they are not nearby when generating -+ // this also means we are minimising locality -+ // but, we need to maintain sorted order by manhatten distance -+ -+ // per manhatten distance we transform the chunk list so that each element is maximally spaced out from each other -+ for (int i = 0, len = byDistance.length; i < len; ++i) { -+ final CustomLongArray points = byDistance[i]; -+ final int expectedSize = getDistanceSize(i, radius); -+ -+ final CustomLongArray spread = spread(points, expectedSize); -+ // add in Q2, Q3, Q4 -+ expandQuadrants(spread, expectedSize); -+ -+ byDistance[i] = spread; -+ } -+ -+ // now, rebuild the list so that it still maintains manhatten distance order -+ final CustomLongArray ret = new CustomLongArray((2 * radius + 1) * (2 * radius + 1)); -+ -+ for (final CustomLongArray dist : byDistance) { -+ ret.addAll(dist); -+ } -+ -+ return ret.elements(); -+ } -+ -+ public static final TicketType REGION_PLAYER_TICKET = TicketType.create("region_player_ticket", Long::compareTo); -+ -+ public static final int MIN_VIEW_DISTANCE = 2; -+ public static final int MAX_VIEW_DISTANCE = 32; -+ -+ public static final int TICK_TICKET_LEVEL = 31; -+ public static final int GENERATED_TICKET_LEVEL = 33 + ChunkStatus.getDistance(ChunkStatus.FULL); -+ public static final int LOADED_TICKET_LEVEL = 33 + ChunkStatus.getDistance(ChunkStatus.EMPTY); -+ -+ public static final record ViewDistances( -+ int tickViewDistance, -+ int loadViewDistance, -+ int sendViewDistance -+ ) { -+ public ViewDistances setTickViewDistance(final int distance) { -+ return new ViewDistances(distance, this.loadViewDistance, this.sendViewDistance); -+ } -+ -+ public ViewDistances setLoadViewDistance(final int distance) { -+ return new ViewDistances(this.tickViewDistance, distance, this.sendViewDistance); -+ } -+ -+ -+ public ViewDistances setSendViewDistance(final int distance) { -+ return new ViewDistances(this.tickViewDistance, this.loadViewDistance, distance); -+ } -+ } -+ -+ public static int getAPITickViewDistance(final Player player) { -+ return getAPITickViewDistance(((CraftPlayer)player).getHandle()); -+ } -+ -+ public static int getAPITickViewDistance(final ServerPlayer player) { -+ final ServerLevel level = (ServerLevel)player.level(); -+ final PlayerChunkLoaderData data = player.chunkLoader; -+ if (data == null) { -+ return level.playerChunkLoader.getAPITickDistance(); -+ } -+ return data.lastTickDistance; -+ } -+ -+ public static int getAPIViewDistance(final Player player) { -+ return getAPIViewDistance(((CraftPlayer)player).getHandle()); -+ } -+ -+ public static int getAPIViewDistance(final ServerPlayer player) { -+ final ServerLevel level = (ServerLevel)player.level(); -+ final PlayerChunkLoaderData data = player.chunkLoader; -+ if (data == null) { -+ return level.playerChunkLoader.getAPIViewDistance(); -+ } -+ // view distance = load distance + 1 -+ return data.lastLoadDistance - 1; -+ } -+ -+ public static int getLoadViewDistance(final ServerPlayer player) { -+ final ServerLevel level = (ServerLevel)player.level(); -+ final PlayerChunkLoaderData data = player.chunkLoader; -+ if (data == null) { -+ return level.playerChunkLoader.getAPIViewDistance(); -+ } -+ // view distance = load distance + 1 -+ return data.lastLoadDistance - 1; -+ } -+ -+ public static int getAPISendViewDistance(final Player player) { -+ return getAPISendViewDistance(((CraftPlayer)player).getHandle()); -+ } -+ -+ public static int getAPISendViewDistance(final ServerPlayer player) { -+ final ServerLevel level = (ServerLevel)player.level(); -+ final PlayerChunkLoaderData data = player.chunkLoader; -+ if (data == null) { -+ return level.playerChunkLoader.getAPISendViewDistance(); -+ } -+ return data.lastSendDistance; -+ } -+ -+ private final ServerLevel world; -+ -+ public RegionizedPlayerChunkLoader(final ServerLevel world) { -+ this.world = world; -+ } -+ -+ public void addPlayer(final ServerPlayer player) { -+ TickThread.ensureTickThread(player, "Cannot add player to player chunk loader async"); -+ if (!player.isRealPlayer) { -+ return; -+ } -+ -+ if (player.chunkLoader != null) { -+ throw new IllegalStateException("Player is already added to player chunk loader"); -+ } -+ -+ final PlayerChunkLoaderData loader = new PlayerChunkLoaderData(this.world, player); -+ -+ player.chunkLoader = loader; -+ loader.add(); -+ } -+ -+ public void updatePlayer(final ServerPlayer player) { -+ final PlayerChunkLoaderData loader = player.chunkLoader; -+ if (loader != null) { -+ loader.update(); -+ } -+ } -+ -+ public void removePlayer(final ServerPlayer player) { -+ TickThread.ensureTickThread(player, "Cannot remove player from player chunk loader async"); -+ if (!player.isRealPlayer) { -+ return; -+ } -+ -+ final PlayerChunkLoaderData loader = player.chunkLoader; -+ -+ if (loader == null) { -+ return; -+ } -+ -+ loader.remove(); -+ player.chunkLoader = null; -+ } -+ -+ public void setSendDistance(final int distance) { -+ this.world.setSendViewDistance(distance); -+ } -+ -+ public void setLoadDistance(final int distance) { -+ this.world.setLoadViewDistance(distance); -+ } -+ -+ public void setTickDistance(final int distance) { -+ this.world.setTickViewDistance(distance); -+ } -+ -+ // Note: follow the player chunk loader so everything stays consistent... -+ public int getAPITickDistance() { -+ final ViewDistances distances = this.world.getViewDistances(); -+ final int tickViewDistance = PlayerChunkLoaderData.getTickDistance(-1, distances.tickViewDistance); -+ return tickViewDistance; -+ } -+ -+ public int getAPIViewDistance() { -+ final ViewDistances distances = this.world.getViewDistances(); -+ final int tickViewDistance = PlayerChunkLoaderData.getTickDistance(-1, distances.tickViewDistance); -+ final int loadDistance = PlayerChunkLoaderData.getLoadViewDistance(tickViewDistance, -1, distances.loadViewDistance); -+ -+ // loadDistance = api view distance + 1 -+ return loadDistance - 1; -+ } -+ -+ public int getAPISendViewDistance() { -+ final ViewDistances distances = this.world.getViewDistances(); -+ final int tickViewDistance = PlayerChunkLoaderData.getTickDistance(-1, distances.tickViewDistance); -+ final int loadDistance = PlayerChunkLoaderData.getLoadViewDistance(tickViewDistance, -1, distances.loadViewDistance); -+ final int sendViewDistance = PlayerChunkLoaderData.getSendViewDistance( -+ loadDistance, -1, -1, distances.sendViewDistance -+ ); -+ -+ return sendViewDistance; -+ } -+ -+ public boolean isChunkSent(final ServerPlayer player, final int chunkX, final int chunkZ, final boolean borderOnly) { -+ return borderOnly ? this.isChunkSentBorderOnly(player, chunkX, chunkZ) : this.isChunkSent(player, chunkX, chunkZ); -+ } -+ -+ public boolean isChunkSent(final ServerPlayer player, final int chunkX, final int chunkZ) { -+ final PlayerChunkLoaderData loader = player.chunkLoader; -+ if (loader == null) { -+ return false; -+ } -+ -+ return loader.sentChunks.contains(CoordinateUtils.getChunkKey(chunkX, chunkZ)); -+ } -+ -+ public boolean isChunkSentBorderOnly(final ServerPlayer player, final int chunkX, final int chunkZ) { -+ final PlayerChunkLoaderData loader = player.chunkLoader; -+ if (loader == null) { -+ return false; -+ } -+ -+ for (int dz = -1; dz <= 1; ++dz) { -+ for (int dx = -1; dx <= 1; ++dx) { -+ if (!loader.sentChunks.contains(CoordinateUtils.getChunkKey(dx + chunkX, dz + chunkZ))) { -+ return true; -+ } -+ } -+ } -+ -+ return false; -+ } -+ -+ public void tick() { -+ TickThread.ensureTickThread("Cannot tick player chunk loader async"); -+ long currTime = System.nanoTime(); -+ for (final ServerPlayer player : new java.util.ArrayList<>(this.world.players())) { -+ final PlayerChunkLoaderData loader = player.chunkLoader; -+ if (loader == null || loader.world != this.world) { -+ // not our problem anymore -+ continue; -+ } -+ loader.update(); // can't invoke plugin logic -+ loader.updateQueues(currTime); -+ } -+ } -+ -+ public static final class PlayerChunkLoaderData { -+ -+ private static final AtomicLong ID_GENERATOR = new AtomicLong(); -+ private final long id = ID_GENERATOR.incrementAndGet(); -+ private final Long idBoxed = Long.valueOf(this.id); -+ -+ private static final long MAX_RATE = 10_000L; -+ -+ private final ServerPlayer player; -+ private final ServerLevel world; -+ -+ private int lastChunkX = Integer.MIN_VALUE; -+ private int lastChunkZ = Integer.MIN_VALUE; -+ -+ private int lastSendDistance = Integer.MIN_VALUE; -+ private int lastLoadDistance = Integer.MIN_VALUE; -+ private int lastTickDistance = Integer.MIN_VALUE; -+ -+ private int lastSentChunkCenterX = Integer.MIN_VALUE; -+ private int lastSentChunkCenterZ = Integer.MIN_VALUE; -+ -+ private int lastSentChunkRadius = Integer.MIN_VALUE; -+ private int lastSentSimulationDistance = Integer.MIN_VALUE; -+ -+ private boolean canGenerateChunks = true; -+ -+ private final ArrayDeque> delayedTicketOps = new ArrayDeque<>(); -+ private final LongOpenHashSet sentChunks = new LongOpenHashSet(); -+ -+ private static final byte CHUNK_TICKET_STAGE_NONE = 0; -+ private static final byte CHUNK_TICKET_STAGE_LOADING = 1; -+ private static final byte CHUNK_TICKET_STAGE_LOADED = 2; -+ private static final byte CHUNK_TICKET_STAGE_GENERATING = 3; -+ private static final byte CHUNK_TICKET_STAGE_GENERATED = 4; -+ private static final byte CHUNK_TICKET_STAGE_TICK = 5; -+ private static final int[] TICKET_STAGE_TO_LEVEL = new int[] { -+ ChunkHolderManager.MAX_TICKET_LEVEL + 1, -+ LOADED_TICKET_LEVEL, -+ LOADED_TICKET_LEVEL, -+ GENERATED_TICKET_LEVEL, -+ GENERATED_TICKET_LEVEL, -+ TICK_TICKET_LEVEL -+ }; -+ private final Long2ByteOpenHashMap chunkTicketStage = new Long2ByteOpenHashMap(); -+ { -+ this.chunkTicketStage.defaultReturnValue(CHUNK_TICKET_STAGE_NONE); -+ } -+ -+ // rate limiting -+ private final AllocatingRateLimiter chunkSendLimiter = new AllocatingRateLimiter(); -+ private final AllocatingRateLimiter chunkLoadTicketLimiter = new AllocatingRateLimiter(); -+ private final AllocatingRateLimiter chunkGenerateTicketLimiter = new AllocatingRateLimiter(); -+ -+ // queues -+ private final LongComparator CLOSEST_MANHATTAN_DIST = (final long c1, final long c2) -> { -+ final int c1x = CoordinateUtils.getChunkX(c1); -+ final int c1z = CoordinateUtils.getChunkZ(c1); -+ -+ final int c2x = CoordinateUtils.getChunkX(c2); -+ final int c2z = CoordinateUtils.getChunkZ(c2); -+ -+ final int centerX = PlayerChunkLoaderData.this.lastChunkX; -+ final int centerZ = PlayerChunkLoaderData.this.lastChunkZ; -+ -+ return Integer.compare( -+ Math.abs(c1x - centerX) + Math.abs(c1z - centerZ), -+ Math.abs(c2x - centerX) + Math.abs(c2z - centerZ) -+ ); -+ }; -+ private final LongHeapPriorityQueue sendQueue = new LongHeapPriorityQueue(CLOSEST_MANHATTAN_DIST); -+ private final LongHeapPriorityQueue tickingQueue = new LongHeapPriorityQueue(CLOSEST_MANHATTAN_DIST); -+ private final LongHeapPriorityQueue generatingQueue = new LongHeapPriorityQueue(CLOSEST_MANHATTAN_DIST); -+ private final LongHeapPriorityQueue genQueue = new LongHeapPriorityQueue(CLOSEST_MANHATTAN_DIST); -+ private final LongHeapPriorityQueue loadingQueue = new LongHeapPriorityQueue(CLOSEST_MANHATTAN_DIST); -+ private final LongHeapPriorityQueue loadQueue = new LongHeapPriorityQueue(CLOSEST_MANHATTAN_DIST); -+ -+ private volatile boolean removed; -+ -+ public PlayerChunkLoaderData(final ServerLevel world, final ServerPlayer player) { -+ this.world = world; -+ this.player = player; -+ } -+ -+ private void flushDelayedTicketOps() { -+ if (this.delayedTicketOps.isEmpty()) { -+ return; -+ } -+ this.world.chunkTaskScheduler.chunkHolderManager.performTicketUpdates(this.delayedTicketOps); -+ this.delayedTicketOps.clear(); -+ } -+ -+ private void pushDelayedTicketOp(final ChunkHolderManager.TicketOperation op) { -+ this.delayedTicketOps.addLast(op); -+ } -+ -+ private void sendChunk(final int chunkX, final int chunkZ) { -+ if (this.sentChunks.add(CoordinateUtils.getChunkKey(chunkX, chunkZ))) { -+ PlayerChunkSender.sendChunk(this.player.connection, this.world, this.world.getChunkIfLoaded(chunkX, chunkZ)); -+ return; -+ } -+ throw new IllegalStateException(); -+ } -+ -+ private void sendUnloadChunk(final int chunkX, final int chunkZ) { -+ if (!this.sentChunks.remove(CoordinateUtils.getChunkKey(chunkX, chunkZ))) { -+ return; -+ } -+ this.sendUnloadChunkRaw(chunkX, chunkZ); -+ } -+ -+ private void sendUnloadChunkRaw(final int chunkX, final int chunkZ) { -+ PlayerChunkSender.dropChunkStatic(this.player, new ChunkPos(chunkX, chunkZ)); -+ } -+ -+ private final SingleUserAreaMap broadcastMap = new SingleUserAreaMap<>(this) { -+ @Override -+ protected void addCallback(final PlayerChunkLoaderData parameter, final int chunkX, final int chunkZ) { -+ // do nothing, we only care about remove -+ } -+ -+ @Override -+ protected void removeCallback(final PlayerChunkLoaderData parameter, final int chunkX, final int chunkZ) { -+ parameter.sendUnloadChunk(chunkX, chunkZ); -+ } -+ }; -+ private final SingleUserAreaMap loadTicketCleanup = new SingleUserAreaMap<>(this) { -+ @Override -+ protected void addCallback(final PlayerChunkLoaderData parameter, final int chunkX, final int chunkZ) { -+ // do nothing, we only care about remove -+ } -+ -+ @Override -+ protected void removeCallback(final PlayerChunkLoaderData parameter, final int chunkX, final int chunkZ) { -+ final long chunk = CoordinateUtils.getChunkKey(chunkX, chunkZ); -+ final byte ticketStage = parameter.chunkTicketStage.remove(chunk); -+ final int level = TICKET_STAGE_TO_LEVEL[ticketStage]; -+ if (level > ChunkHolderManager.MAX_TICKET_LEVEL) { -+ return; -+ } -+ -+ parameter.pushDelayedTicketOp(ChunkHolderManager.TicketOperation.addAndRemove( -+ chunk, -+ TicketType.UNKNOWN, level, new ChunkPos(chunkX, chunkZ), -+ REGION_PLAYER_TICKET, level, parameter.idBoxed -+ )); -+ } -+ }; -+ private final SingleUserAreaMap tickMap = new SingleUserAreaMap<>(this) { -+ @Override -+ protected void addCallback(final PlayerChunkLoaderData parameter, final int chunkX, final int chunkZ) { -+ // do nothing, we will detect ticking chunks when we try to load them -+ } -+ -+ @Override -+ protected void removeCallback(final PlayerChunkLoaderData parameter, final int chunkX, final int chunkZ) { -+ final long chunk = CoordinateUtils.getChunkKey(chunkX, chunkZ); -+ // note: by the time this is called, the tick cleanup should have ran - so, if the chunk is at -+ // the tick stage it was deemed in range for loading. Thus, we need to move it to generated -+ if (!parameter.chunkTicketStage.replace(chunk, CHUNK_TICKET_STAGE_TICK, CHUNK_TICKET_STAGE_GENERATED)) { -+ return; -+ } -+ -+ // Since we are possibly downgrading the ticket level, we add an unknown ticket so that -+ // the level is kept until tick(). -+ parameter.pushDelayedTicketOp(ChunkHolderManager.TicketOperation.addAndRemove( -+ chunk, -+ TicketType.UNKNOWN, TICK_TICKET_LEVEL, new ChunkPos(chunkX, chunkZ), -+ REGION_PLAYER_TICKET, TICK_TICKET_LEVEL, parameter.idBoxed -+ )); -+ // keep chunk at new generated level -+ parameter.pushDelayedTicketOp(ChunkHolderManager.TicketOperation.addOp( -+ chunk, -+ REGION_PLAYER_TICKET, GENERATED_TICKET_LEVEL, parameter.idBoxed -+ )); -+ } -+ }; -+ -+ private static boolean wantChunkLoaded(final int centerX, final int centerZ, final int chunkX, final int chunkZ, -+ final int sendRadius) { -+ // expect sendRadius to be = 1 + target viewable radius -+ return ChunkTrackingView.isWithinDistance(centerX, centerZ, sendRadius, chunkX, chunkZ, true); -+ } -+ -+ private static int getClientViewDistance(final ServerPlayer player) { -+ final Integer vd = player.requestedViewDistance(); -+ return vd == null ? -1 : Math.max(0, vd.intValue()); -+ } -+ -+ private static int getTickDistance(final int playerTickViewDistance, final int worldTickViewDistance) { -+ return playerTickViewDistance < 0 ? worldTickViewDistance : playerTickViewDistance; -+ } -+ -+ private static int getLoadViewDistance(final int tickViewDistance, final int playerLoadViewDistance, -+ final int worldLoadViewDistance) { -+ return Math.max(tickViewDistance + 1, playerLoadViewDistance < 0 ? worldLoadViewDistance : playerLoadViewDistance); -+ } -+ -+ private static int getSendViewDistance(final int loadViewDistance, final int clientViewDistance, -+ final int playerSendViewDistance, final int worldSendViewDistance) { -+ return Math.min( -+ loadViewDistance - 1, -+ playerSendViewDistance < 0 ? (!GlobalConfiguration.get().chunkLoadingAdvanced.autoConfigSendDistance || clientViewDistance < 0 ? (worldSendViewDistance < 0 ? (loadViewDistance - 1) : worldSendViewDistance) : clientViewDistance + 1) : playerSendViewDistance -+ ); -+ } -+ -+ private Packet updateClientChunkRadius(final int radius) { -+ this.lastSentChunkRadius = radius; -+ return new ClientboundSetChunkCacheRadiusPacket(radius); -+ } -+ -+ private Packet updateClientSimulationDistance(final int distance) { -+ this.lastSentSimulationDistance = distance; -+ return new ClientboundSetSimulationDistancePacket(distance); -+ } -+ -+ private Packet updateClientChunkCenter(final int chunkX, final int chunkZ) { -+ this.lastSentChunkCenterX = chunkX; -+ this.lastSentChunkCenterZ = chunkZ; -+ return new ClientboundSetChunkCacheCenterPacket(chunkX, chunkZ); -+ } -+ -+ private boolean canPlayerGenerateChunks() { -+ return !this.player.isSpectator() || this.world.getGameRules().getBoolean(GameRules.RULE_SPECTATORSGENERATECHUNKS); -+ } -+ -+ private double getMaxChunkLoadRate() { -+ final double configRate = GlobalConfiguration.get().chunkLoadingBasic.playerMaxChunkLoadRate; -+ -+ return configRate < 0.0 || configRate > (double)MAX_RATE ? (double)MAX_RATE : Math.max(1.0, configRate); -+ } -+ -+ private double getMaxChunkGenRate() { -+ final double configRate = GlobalConfiguration.get().chunkLoadingBasic.playerMaxChunkGenerateRate; -+ -+ return configRate < 0.0 || configRate > (double)MAX_RATE ? (double)MAX_RATE : Math.max(1.0, configRate); -+ } -+ -+ private double getMaxChunkSendRate() { -+ final double configRate = GlobalConfiguration.get().chunkLoadingBasic.playerMaxChunkSendRate; -+ -+ return configRate < 0.0 || configRate > (double)MAX_RATE ? (double)MAX_RATE : Math.max(1.0, configRate); -+ } -+ -+ private long getMaxChunkLoads() { -+ final long radiusChunks = (2L * this.lastLoadDistance + 1L) * (2L * this.lastLoadDistance + 1L); -+ long configLimit = GlobalConfiguration.get().chunkLoadingAdvanced.playerMaxConcurrentChunkLoads; -+ if (configLimit == 0L) { -+ // by default, only allow 1/5th of the chunks in the view distance to be concurrently active -+ configLimit = Math.max(5L, radiusChunks / 5L); -+ } else if (configLimit < 0L) { -+ configLimit = Integer.MAX_VALUE; -+ } // else: use the value configured -+ configLimit = configLimit - this.loadingQueue.size(); -+ -+ return configLimit; -+ } -+ -+ private long getMaxChunkGenerates() { -+ final long radiusChunks = (2L * this.lastLoadDistance + 1L) * (2L * this.lastLoadDistance + 1L); -+ long configLimit = GlobalConfiguration.get().chunkLoadingAdvanced.playerMaxConcurrentChunkGenerates; -+ if (configLimit == 0L) { -+ // by default, only allow 1/5th of the chunks in the view distance to be concurrently active -+ configLimit = Math.max(5L, radiusChunks / 5L); -+ } else if (configLimit < 0L) { -+ configLimit = Integer.MAX_VALUE; -+ } // else: use the value configured -+ configLimit = configLimit - this.generatingQueue.size(); -+ -+ return configLimit; -+ } -+ -+ private boolean wantChunkSent(final int chunkX, final int chunkZ) { -+ final int dx = this.lastChunkX - chunkX; -+ final int dz = this.lastChunkZ - chunkZ; -+ return (Math.max(Math.abs(dx), Math.abs(dz)) <= (this.lastSendDistance + 1)) && wantChunkLoaded( -+ this.lastChunkX, this.lastChunkZ, chunkX, chunkZ, this.lastSendDistance -+ ); -+ } -+ -+ private boolean wantChunkTicked(final int chunkX, final int chunkZ) { -+ final int dx = this.lastChunkX - chunkX; -+ final int dz = this.lastChunkZ - chunkZ; -+ return Math.max(Math.abs(dx), Math.abs(dz)) <= this.lastTickDistance; -+ } -+ -+ void updateQueues(final long time) { -+ TickThread.ensureTickThread(this.player, "Cannot tick player chunk loader async"); -+ if (this.removed) { -+ throw new IllegalStateException("Ticking removed player chunk loader"); -+ } -+ // update rate limits -+ final double loadRate = this.getMaxChunkLoadRate(); -+ final double genRate = this.getMaxChunkGenRate(); -+ final double sendRate = this.getMaxChunkSendRate(); -+ -+ this.chunkLoadTicketLimiter.tickAllocation(time, loadRate, loadRate); -+ this.chunkGenerateTicketLimiter.tickAllocation(time, genRate, genRate); -+ this.chunkSendLimiter.tickAllocation(time, sendRate, sendRate); -+ -+ // try to progress chunk loads -+ while (!this.loadingQueue.isEmpty()) { -+ final long pendingLoadChunk = this.loadingQueue.firstLong(); -+ final int pendingChunkX = CoordinateUtils.getChunkX(pendingLoadChunk); -+ final int pendingChunkZ = CoordinateUtils.getChunkZ(pendingLoadChunk); -+ final ChunkAccess pending = this.world.chunkSource.getChunkAtImmediately(pendingChunkX, pendingChunkZ); -+ if (pending == null) { -+ // nothing to do here -+ break; -+ } -+ // chunk has loaded, so we can take it out of the queue -+ this.loadingQueue.dequeueLong(); -+ -+ // try to move to generate queue -+ final byte prev = this.chunkTicketStage.put(pendingLoadChunk, CHUNK_TICKET_STAGE_LOADED); -+ if (prev != CHUNK_TICKET_STAGE_LOADING) { -+ throw new IllegalStateException("Previous state should be " + CHUNK_TICKET_STAGE_LOADING + ", not " + prev); -+ } -+ -+ if (this.canGenerateChunks || this.isLoadedChunkGeneratable(pending)) { -+ this.genQueue.enqueue(pendingLoadChunk); -+ } // else: don't want to generate, so just leave it loaded -+ } -+ -+ // try to push more chunk loads -+ final long maxLoads = Math.max(0L, Math.min(MAX_RATE, Math.min(this.loadQueue.size(), this.getMaxChunkLoads()))); -+ final int maxLoadsThisTick = (int)this.chunkLoadTicketLimiter.takeAllocation(time, loadRate, maxLoads); -+ if (maxLoadsThisTick > 0) { -+ final LongArrayList chunks = new LongArrayList(maxLoadsThisTick); -+ for (int i = 0; i < maxLoadsThisTick; ++i) { -+ final long chunk = this.loadQueue.dequeueLong(); -+ final byte prev = this.chunkTicketStage.put(chunk, CHUNK_TICKET_STAGE_LOADING); -+ if (prev != CHUNK_TICKET_STAGE_NONE) { -+ throw new IllegalStateException("Previous state should be " + CHUNK_TICKET_STAGE_NONE + ", not " + prev); -+ } -+ this.pushDelayedTicketOp( -+ ChunkHolderManager.TicketOperation.addOp( -+ chunk, -+ REGION_PLAYER_TICKET, LOADED_TICKET_LEVEL, this.idBoxed -+ ) -+ ); -+ chunks.add(chunk); -+ this.loadingQueue.enqueue(chunk); -+ } -+ -+ // here we need to flush tickets, as scheduleChunkLoad requires tickets to be propagated with addTicket = false -+ this.flushDelayedTicketOps(); -+ // we only need to call scheduleChunkLoad because the loaded ticket level is not enough to start the chunk -+ // load - only generate ticket levels start anything, but they start generation... -+ // propagate levels -+ // Note: this CAN call plugin logic, so it is VITAL that our bookkeeping logic is completely done by the time this is invoked -+ this.world.chunkTaskScheduler.chunkHolderManager.processTicketUpdates(); -+ -+ if (this.removed) { -+ // process ticket updates may invoke plugin logic, which may remove this player -+ return; -+ } -+ -+ for (int i = 0; i < maxLoadsThisTick; ++i) { -+ final long queuedLoadChunk = chunks.getLong(i); -+ final int queuedChunkX = CoordinateUtils.getChunkX(queuedLoadChunk); -+ final int queuedChunkZ = CoordinateUtils.getChunkZ(queuedLoadChunk); -+ this.world.chunkTaskScheduler.scheduleChunkLoad( -+ queuedChunkX, queuedChunkZ, ChunkStatus.EMPTY, false, PrioritisedExecutor.Priority.NORMAL, null -+ ); -+ if (this.removed) { -+ return; -+ } -+ } -+ } -+ -+ // try to progress chunk generations -+ while (!this.generatingQueue.isEmpty()) { -+ final long pendingGenChunk = this.generatingQueue.firstLong(); -+ final int pendingChunkX = CoordinateUtils.getChunkX(pendingGenChunk); -+ final int pendingChunkZ = CoordinateUtils.getChunkZ(pendingGenChunk); -+ final LevelChunk pending = this.world.chunkSource.getChunkAtIfLoadedMainThreadNoCache(pendingChunkX, pendingChunkZ); -+ if (pending == null) { -+ // nothing to do here -+ break; -+ } -+ -+ // chunk has generated, so we can take it out of queue -+ this.generatingQueue.dequeueLong(); -+ -+ final byte prev = this.chunkTicketStage.put(pendingGenChunk, CHUNK_TICKET_STAGE_GENERATED); -+ if (prev != CHUNK_TICKET_STAGE_GENERATING) { -+ throw new IllegalStateException("Previous state should be " + CHUNK_TICKET_STAGE_GENERATING + ", not " + prev); -+ } -+ -+ // try to move to send queue -+ if (this.wantChunkSent(pendingChunkX, pendingChunkZ)) { -+ this.sendQueue.enqueue(pendingGenChunk); -+ } -+ // try to move to tick queue -+ if (this.wantChunkTicked(pendingChunkX, pendingChunkZ)) { -+ this.tickingQueue.enqueue(pendingGenChunk); -+ } -+ } -+ -+ // try to push more chunk generations -+ final long maxGens = Math.max(0L, Math.min(MAX_RATE, Math.min(this.genQueue.size(), this.getMaxChunkGenerates()))); -+ final int maxGensThisTick = (int)this.chunkGenerateTicketLimiter.takeAllocation(time, genRate, maxGens); -+ int ratedGensThisTick = 0; -+ while (!this.genQueue.isEmpty()) { -+ final long chunkKey = this.genQueue.firstLong(); -+ final int chunkX = CoordinateUtils.getChunkX(chunkKey); -+ final int chunkZ = CoordinateUtils.getChunkZ(chunkKey); -+ final ChunkAccess chunk = this.world.chunkSource.getChunkAtImmediately(chunkX, chunkZ); -+ if (chunk.getStatus() != ChunkStatus.FULL) { -+ // only rate limit actual generations -+ if ((ratedGensThisTick + 1) > maxGensThisTick) { -+ break; -+ } -+ ++ratedGensThisTick; -+ } -+ -+ this.genQueue.dequeueLong(); -+ -+ final byte prev = this.chunkTicketStage.put(chunkKey, CHUNK_TICKET_STAGE_GENERATING); -+ if (prev != CHUNK_TICKET_STAGE_LOADED) { -+ throw new IllegalStateException("Previous state should be " + CHUNK_TICKET_STAGE_LOADED + ", not " + prev); -+ } -+ this.pushDelayedTicketOp( -+ ChunkHolderManager.TicketOperation.addAndRemove( -+ chunkKey, -+ REGION_PLAYER_TICKET, GENERATED_TICKET_LEVEL, this.idBoxed, -+ REGION_PLAYER_TICKET, LOADED_TICKET_LEVEL, this.idBoxed -+ ) -+ ); -+ this.generatingQueue.enqueue(chunkKey); -+ } -+ -+ // try to pull ticking chunks -+ tick_check_outer: -+ while (!this.tickingQueue.isEmpty()) { -+ final long pendingTicking = this.tickingQueue.firstLong(); -+ final int pendingChunkX = CoordinateUtils.getChunkX(pendingTicking); -+ final int pendingChunkZ = CoordinateUtils.getChunkZ(pendingTicking); -+ -+ final int tickingReq = 2; -+ for (int dz = -tickingReq; dz <= tickingReq; ++dz) { -+ for (int dx = -tickingReq; dx <= tickingReq; ++dx) { -+ if ((dx | dz) == 0) { -+ continue; -+ } -+ final long neighbour = CoordinateUtils.getChunkKey(dx + pendingChunkX, dz + pendingChunkZ); -+ final byte stage = this.chunkTicketStage.get(neighbour); -+ if (stage != CHUNK_TICKET_STAGE_GENERATED && stage != CHUNK_TICKET_STAGE_TICK) { -+ break tick_check_outer; -+ } -+ } -+ } -+ // only gets here if all neighbours were marked as generated or ticking themselves -+ this.tickingQueue.dequeueLong(); -+ this.pushDelayedTicketOp( -+ ChunkHolderManager.TicketOperation.addAndRemove( -+ pendingTicking, -+ REGION_PLAYER_TICKET, TICK_TICKET_LEVEL, this.idBoxed, -+ REGION_PLAYER_TICKET, GENERATED_TICKET_LEVEL, this.idBoxed -+ ) -+ ); -+ // there is no queue to add after ticking -+ final byte prev = this.chunkTicketStage.put(pendingTicking, CHUNK_TICKET_STAGE_TICK); -+ if (prev != CHUNK_TICKET_STAGE_GENERATED) { -+ throw new IllegalStateException("Previous state should be " + CHUNK_TICKET_STAGE_GENERATED + ", not " + prev); -+ } -+ } -+ -+ // try to pull sending chunks -+ final long maxSends = Math.max(0L, Math.min(MAX_RATE, Integer.MAX_VALUE)); // no logic to track concurrent sends -+ final int maxSendsThisTick = Math.min((int)this.chunkSendLimiter.takeAllocation(time, sendRate, maxSends), this.sendQueue.size()); -+ // we do not return sends that we took from the allocation back because we want to limit the max send rate, not target it -+ for (int i = 0; i < maxSendsThisTick; ++i) { -+ final long pendingSend = this.sendQueue.firstLong(); -+ final int pendingSendX = CoordinateUtils.getChunkX(pendingSend); -+ final int pendingSendZ = CoordinateUtils.getChunkZ(pendingSend); -+ final LevelChunk chunk = this.world.chunkSource.getChunkAtIfLoadedMainThreadNoCache(pendingSendX, pendingSendZ); -+ if (!chunk.areNeighboursLoaded(1) || !TickThread.isTickThreadFor(this.world, pendingSendX, pendingSendZ)) { -+ // nothing to do -+ // the target chunk may not be owned by this region, but this should be resolved in the future -+ break; -+ } -+ if (!chunk.isPostProcessingDone) { -+ // not yet post-processed, need to do this so that tile entities can properly be sent to clients -+ chunk.postProcessGeneration(); -+ // check if there was any recursive action -+ if (this.removed || this.sendQueue.isEmpty() || this.sendQueue.firstLong() != pendingSend) { -+ return; -+ } // else: good to dequeue and send, fall through -+ } -+ this.sendQueue.dequeueLong(); -+ -+ this.sendChunk(pendingSendX, pendingSendZ); -+ if (this.removed) { -+ // sendChunk may invoke plugin logic -+ return; -+ } -+ } -+ -+ this.flushDelayedTicketOps(); -+ // we assume propagate ticket levels happens after this call -+ } -+ -+ void add() { -+ TickThread.ensureTickThread(this.player, "Cannot add player asynchronously"); -+ if (this.removed) { -+ throw new IllegalStateException("Adding removed player chunk loader"); -+ } -+ final ViewDistances playerDistances = this.player.getViewDistances(); -+ final ViewDistances worldDistances = this.world.getViewDistances(); -+ final int chunkX = this.player.chunkPosition().x; -+ final int chunkZ = this.player.chunkPosition().z; -+ -+ final int tickViewDistance = getTickDistance(playerDistances.tickViewDistance, worldDistances.tickViewDistance); -+ // load view cannot be less-than tick view + 1 -+ final int loadViewDistance = getLoadViewDistance(tickViewDistance, playerDistances.loadViewDistance, worldDistances.loadViewDistance); -+ // send view cannot be greater-than load view -+ final int clientViewDistance = getClientViewDistance(this.player); -+ final int sendViewDistance = getSendViewDistance(loadViewDistance, clientViewDistance, playerDistances.sendViewDistance, worldDistances.sendViewDistance); -+ -+ // send view distances -+ this.player.connection.send(this.updateClientChunkRadius(sendViewDistance)); -+ this.player.connection.send(this.updateClientSimulationDistance(tickViewDistance)); -+ -+ // add to distance maps -+ this.broadcastMap.add(chunkX, chunkZ, sendViewDistance + 1); -+ this.loadTicketCleanup.add(chunkX, chunkZ, loadViewDistance + 1); -+ this.tickMap.add(chunkX, chunkZ, tickViewDistance); -+ -+ // update chunk center -+ this.player.connection.send(this.updateClientChunkCenter(chunkX, chunkZ)); -+ -+ // now we can update -+ this.update(); -+ } -+ -+ private boolean isLoadedChunkGeneratable(final int chunkX, final int chunkZ) { -+ return this.isLoadedChunkGeneratable(this.world.chunkSource.getChunkAtImmediately(chunkX, chunkZ)); -+ } -+ -+ private boolean isLoadedChunkGeneratable(final ChunkAccess chunkAccess) { -+ final BelowZeroRetrogen belowZeroRetrogen; -+ // see PortalForcer#findPortalAround -+ return chunkAccess != null && ( -+ chunkAccess.getStatus() == ChunkStatus.FULL || -+ ((belowZeroRetrogen = chunkAccess.getBelowZeroRetrogen()) != null && belowZeroRetrogen.targetStatus().isOrAfter(ChunkStatus.SPAWN)) -+ ); -+ } -+ -+ void update() { -+ TickThread.ensureTickThread(this.player, "Cannot update player asynchronously"); -+ if (this.removed) { -+ throw new IllegalStateException("Updating removed player chunk loader"); -+ } -+ final ViewDistances playerDistances = this.player.getViewDistances(); -+ final ViewDistances worldDistances = this.world.getViewDistances(); -+ -+ final int tickViewDistance = getTickDistance(playerDistances.tickViewDistance, worldDistances.tickViewDistance); -+ // load view cannot be less-than tick view + 1 -+ final int loadViewDistance = getLoadViewDistance(tickViewDistance, playerDistances.loadViewDistance, worldDistances.loadViewDistance); -+ // send view cannot be greater-than load view -+ final int clientViewDistance = getClientViewDistance(this.player); -+ final int sendViewDistance = getSendViewDistance(loadViewDistance, clientViewDistance, playerDistances.sendViewDistance, worldDistances.sendViewDistance); -+ -+ final ChunkPos playerPos = this.player.chunkPosition(); -+ final boolean canGenerateChunks = this.canPlayerGenerateChunks(); -+ final int currentChunkX = playerPos.x; -+ final int currentChunkZ = playerPos.z; -+ -+ final int prevChunkX = this.lastChunkX; -+ final int prevChunkZ = this.lastChunkZ; -+ -+ if ( -+ // has view distance stayed the same? -+ sendViewDistance == this.lastSendDistance -+ && loadViewDistance == this.lastLoadDistance -+ && tickViewDistance == this.lastTickDistance -+ -+ // has our chunk stayed the same? -+ && prevChunkX == currentChunkX -+ && prevChunkZ == currentChunkZ -+ -+ // can we still generate chunks? -+ && this.canGenerateChunks == canGenerateChunks -+ ) { -+ // nothing we care about changed, so we're not re-calculating -+ return; -+ } -+ -+ // update distance maps -+ this.broadcastMap.update(currentChunkX, currentChunkZ, sendViewDistance + 1); -+ this.loadTicketCleanup.update(currentChunkX, currentChunkZ, loadViewDistance + 1); -+ this.tickMap.update(currentChunkX, currentChunkZ, tickViewDistance); -+ if (sendViewDistance > loadViewDistance || tickViewDistance > loadViewDistance) { -+ throw new IllegalStateException(); -+ } -+ -+ // update VDs for client -+ // this should be after the distance map updates, as they will send unload packets -+ if (this.lastSentChunkRadius != sendViewDistance) { -+ this.player.connection.send(this.updateClientChunkRadius(sendViewDistance)); -+ } -+ if (this.lastSentSimulationDistance != tickViewDistance) { -+ this.player.connection.send(this.updateClientSimulationDistance(tickViewDistance)); -+ } -+ -+ this.sendQueue.clear(); -+ this.tickingQueue.clear(); -+ this.generatingQueue.clear(); -+ this.genQueue.clear(); -+ this.loadingQueue.clear(); -+ this.loadQueue.clear(); -+ -+ this.lastChunkX = currentChunkX; -+ this.lastChunkZ = currentChunkZ; -+ this.lastSendDistance = sendViewDistance; -+ this.lastLoadDistance = loadViewDistance; -+ this.lastTickDistance = tickViewDistance; -+ this.canGenerateChunks = canGenerateChunks; -+ -+ // +1 since we need to load chunks +1 around the load view distance... -+ final long[] toIterate = SEARCH_RADIUS_ITERATION_LIST[loadViewDistance + 1]; -+ // the iteration order is by increasing manhattan distance - so, we do NOT need to -+ // sort anything in the queue! -+ for (final long deltaChunk : toIterate) { -+ final int dx = CoordinateUtils.getChunkX(deltaChunk); -+ final int dz = CoordinateUtils.getChunkZ(deltaChunk); -+ final int chunkX = dx + currentChunkX; -+ final int chunkZ = dz + currentChunkZ; -+ final long chunk = CoordinateUtils.getChunkKey(chunkX, chunkZ); -+ final int squareDistance = Math.max(Math.abs(dx), Math.abs(dz)); -+ final int manhattanDistance = Math.abs(dx) + Math.abs(dz); -+ -+ // since chunk sending is not by radius alone, we need an extra check here to account for -+ // everything <= sendDistance -+ // Note: Vanilla may want to send chunks outside the send view distance, so we do need -+ // the dist <= view check -+ final boolean sendChunk = (squareDistance <= (sendViewDistance + 1)) -+ && wantChunkLoaded(currentChunkX, currentChunkZ, chunkX, chunkZ, sendViewDistance); -+ final boolean sentChunk = sendChunk ? this.sentChunks.contains(chunk) : this.sentChunks.remove(chunk); -+ -+ if (!sendChunk && sentChunk) { -+ // have sent the chunk, but don't want it anymore -+ // unload it now -+ this.sendUnloadChunkRaw(chunkX, chunkZ); -+ } -+ -+ final byte stage = this.chunkTicketStage.get(chunk); -+ switch (stage) { -+ case CHUNK_TICKET_STAGE_NONE: { -+ // we want the chunk to be at least loaded -+ this.loadQueue.enqueue(chunk); -+ break; -+ } -+ case CHUNK_TICKET_STAGE_LOADING: { -+ this.loadingQueue.enqueue(chunk); -+ break; -+ } -+ case CHUNK_TICKET_STAGE_LOADED: { -+ if (canGenerateChunks || this.isLoadedChunkGeneratable(chunkX, chunkZ)) { -+ this.genQueue.enqueue(chunk); -+ } -+ break; -+ } -+ case CHUNK_TICKET_STAGE_GENERATING: { -+ this.generatingQueue.enqueue(chunk); -+ break; -+ } -+ case CHUNK_TICKET_STAGE_GENERATED: { -+ if (sendChunk && !sentChunk) { -+ this.sendQueue.enqueue(chunk); -+ } -+ if (squareDistance <= tickViewDistance) { -+ this.tickingQueue.enqueue(chunk); -+ } -+ break; -+ } -+ case CHUNK_TICKET_STAGE_TICK: { -+ if (sendChunk && !sentChunk) { -+ this.sendQueue.enqueue(chunk); -+ } -+ break; -+ } -+ default: { -+ throw new IllegalStateException("Unknown stage: " + stage); -+ } -+ } -+ } -+ -+ // update the chunk center -+ // this must be done last so that the client does not ignore any of our unload chunk packets above -+ if (this.lastSentChunkCenterX != currentChunkX || this.lastSentChunkCenterZ != currentChunkZ) { -+ this.player.connection.send(this.updateClientChunkCenter(currentChunkX, currentChunkZ)); -+ } -+ -+ this.flushDelayedTicketOps(); -+ } -+ -+ void remove() { -+ TickThread.ensureTickThread(this.player, "Cannot add player asynchronously"); -+ if (this.removed) { -+ throw new IllegalStateException("Removing removed player chunk loader"); -+ } -+ this.removed = true; -+ // sends the chunk unload packets -+ this.broadcastMap.remove(); -+ // cleans up loading/generating tickets -+ this.loadTicketCleanup.remove(); -+ // cleans up ticking tickets -+ this.tickMap.remove(); -+ -+ // purge queues -+ this.sendQueue.clear(); -+ this.tickingQueue.clear(); -+ this.generatingQueue.clear(); -+ this.genQueue.clear(); -+ this.loadingQueue.clear(); -+ this.loadQueue.clear(); -+ -+ // flush ticket changes -+ this.flushDelayedTicketOps(); -+ -+ // now all tickets should be removed, which is all of our external state -+ } -+ } -+ -+ // TODO rebase into util patch -+ private static final class AllocatingRateLimiter { -+ -+ // max difference granularity in ns -+ private static final long MAX_GRANULARITY = TimeUnit.SECONDS.toNanos(1L); -+ -+ private double allocation; -+ private long lastAllocationUpdate; -+ private double takeCarry; -+ private long lastTakeUpdate; -+ -+ // rate in units/s, and time in ns -+ public void tickAllocation(final long time, final double rate, final double maxAllocation) { -+ final long diff = Math.min(MAX_GRANULARITY, time - this.lastAllocationUpdate); -+ this.lastAllocationUpdate = time; -+ -+ this.allocation = Math.min(maxAllocation - this.takeCarry, this.allocation + rate * (diff*1.0E-9D)); -+ } -+ -+ // rate in units/s, and time in ns -+ public long takeAllocation(final long time, final double rate, final long maxTake) { -+ if (maxTake < 1L) { -+ return 0L; -+ } -+ -+ double ret = this.takeCarry; -+ final long diff = Math.min(MAX_GRANULARITY, time - this.lastTakeUpdate); -+ this.lastTakeUpdate = time; -+ -+ // note: abs(takeCarry) <= 1.0 -+ final double take = Math.min(Math.min((double)maxTake - this.takeCarry, this.allocation), rate * (diff*1.0E-9)); -+ -+ ret += take; -+ this.allocation -= take; -+ -+ final long retInteger = (long)Math.floor(ret); -+ this.takeCarry = ret - (double)retInteger; -+ -+ return retInteger; -+ } -+ } -+ -+ static final class CountedSRSWLinkedQueue { -+ -+ private final SRSWLinkedQueue queue = new SRSWLinkedQueue<>(); -+ private volatile long countAdded; -+ private volatile long countRemoved; -+ -+ private static final VarHandle COUNT_ADDED_HANDLE = ConcurrentUtil.getVarHandle(CountedSRSWLinkedQueue.class, "countAdded", long.class); -+ private static final VarHandle COUNT_REMOVED_HANDLE = ConcurrentUtil.getVarHandle(CountedSRSWLinkedQueue.class, "countRemoved", long.class); -+ -+ private long getCountAddedPlain() { -+ return (long)COUNT_ADDED_HANDLE.get(this); -+ } -+ -+ private long getCountAddedAcquire() { -+ return (long)COUNT_ADDED_HANDLE.getAcquire(this); -+ } -+ -+ private void setCountAddedRelease(final long to) { -+ COUNT_ADDED_HANDLE.setRelease(this, to); -+ } -+ -+ private long getCountRemovedPlain() { -+ return (long)COUNT_REMOVED_HANDLE.get(this); -+ } -+ -+ private long getCountRemovedAcquire() { -+ return (long)COUNT_REMOVED_HANDLE.getAcquire(this); -+ } -+ -+ private void setCountRemovedRelease(final long to) { -+ COUNT_REMOVED_HANDLE.setRelease(this, to); -+ } -+ -+ public void add(final E element) { -+ this.setCountAddedRelease(this.getCountAddedPlain() + 1L); -+ this.queue.addLast(element); -+ } -+ -+ public E poll() { -+ final E ret = this.queue.poll(); -+ if (ret != null) { -+ this.setCountRemovedRelease(this.getCountRemovedPlain() + 1L); -+ } -+ -+ return ret; -+ } -+ -+ public long size() { -+ final long removed = this.getCountRemovedAcquire(); -+ final long added = this.getCountAddedAcquire(); -+ -+ return added - removed; -+ } -+ } -+ -+ private static class CustomLongArray extends LongArrayList { -+ -+ public CustomLongArray() { -+ super(); -+ } -+ -+ public CustomLongArray(final int expected) { -+ super(expected); -+ } -+ -+ public boolean addAll(final CustomLongArray list) { -+ this.addElements(this.size, list.a, 0, list.size); -+ return list.size != 0; -+ } -+ -+ public void addUnchecked(final long value) { -+ this.a[this.size++] = value; -+ } -+ -+ public void forceSize(final int to) { -+ this.size = to; -+ } -+ -+ @Override -+ public int hashCode() { -+ long h = 1L; -+ -+ Objects.checkFromToIndex(0, this.size, this.a.length); -+ -+ for (int i = 0; i < this.size; ++i) { -+ h = it.unimi.dsi.fastutil.HashCommon.mix(h + this.a[i]); -+ } -+ -+ return (int)h; -+ } -+ -+ @Override -+ public boolean equals(final Object o) { -+ if (o == this) { -+ return true; -+ } -+ -+ if (!(o instanceof CustomLongArray other)) { -+ return false; -+ } -+ -+ return this.size == other.size && Arrays.equals(this.a, 0, this.size, other.a, 0, this.size); -+ } -+ } -+ -+ private static int getDistanceSize(final int radius, final int max) { -+ if (radius == 0) { -+ return 1; -+ } -+ final int diff = radius - max; -+ if (diff <= 0) { -+ return 4*radius; -+ } -+ return 4*(max - Math.max(0, diff - 1)); -+ } -+ -+ private static int getQ1DistanceSize(final int radius, final int max) { -+ if (radius == 0) { -+ return 1; -+ } -+ final int diff = radius - max; -+ if (diff <= 0) { -+ return radius+1; -+ } -+ return max - diff + 1; -+ } -+ -+ private static final class BasicFIFOLQueue { -+ -+ private final long[] values; -+ private int head, tail; -+ -+ public BasicFIFOLQueue(final int cap) { -+ if (cap <= 1) { -+ throw new IllegalArgumentException(); -+ } -+ this.values = new long[cap]; -+ } -+ -+ public boolean isEmpty() { -+ return this.head == this.tail; -+ } -+ -+ public long removeFirst() { -+ final long ret = this.values[this.head]; -+ -+ if (this.head == this.tail) { -+ throw new IllegalStateException(); -+ } -+ -+ ++this.head; -+ if (this.head == this.values.length) { -+ this.head = 0; -+ } -+ -+ return ret; -+ } -+ -+ public void addLast(final long value) { -+ this.values[this.tail++] = value; -+ -+ if (this.tail == this.head) { -+ throw new IllegalStateException(); -+ } -+ -+ if (this.tail == this.values.length) { -+ this.tail = 0; -+ } -+ } -+ } -+ -+ private static CustomLongArray[] makeQ1BFS(final int radius) { -+ final CustomLongArray[] ret = new CustomLongArray[2 * radius + 1]; -+ final BasicFIFOLQueue queue = new BasicFIFOLQueue(Math.max(1, 4 * radius) + 1); -+ final LongOpenHashSet seen = new LongOpenHashSet((radius + 1) * (radius + 1)); -+ -+ seen.add(CoordinateUtils.getChunkKey(0, 0)); -+ queue.addLast(CoordinateUtils.getChunkKey(0, 0)); -+ while (!queue.isEmpty()) { -+ final long chunk = queue.removeFirst(); -+ final int chunkX = CoordinateUtils.getChunkX(chunk); -+ final int chunkZ = CoordinateUtils.getChunkZ(chunk); -+ -+ final int index = Math.abs(chunkX) + Math.abs(chunkZ); -+ final CustomLongArray list = ret[index]; -+ if (list != null) { -+ list.addUnchecked(chunk); -+ } else { -+ (ret[index] = new CustomLongArray(getQ1DistanceSize(index, radius))).addUnchecked(chunk); -+ } -+ -+ for (int i = 0; i < 4; ++i) { -+ // 0 -> -1, 0 -+ // 1 -> 0, -1 -+ // 2 -> 1, 0 -+ // 3 -> 0, 1 -+ -+ final int signInv = -(i >>> 1); // 2/3 -> -(1), 0/1 -> -(0) -+ // note: -n = (~n) + 1 -+ // (n ^ signInv) - signInv = signInv == 0 ? ((n ^ 0) - 0 = n) : ((n ^ -1) - (-1) = ~n + 1) -+ -+ final int axis = i & 1; // 0/2 -> 0, 1/3 -> 1 -+ final int dx = ((axis - 1) ^ signInv) - signInv; // 0 -> -1, 1 -> 0 -+ final int dz = (-axis ^ signInv) - signInv; // 0 -> 0, 1 -> -1 -+ -+ final int neighbourX = chunkX + dx; -+ final int neighbourZ = chunkZ + dz; -+ final long neighbour = CoordinateUtils.getChunkKey(neighbourX, neighbourZ); -+ -+ if ((neighbourX | neighbourZ) < 0 || Math.max(Math.abs(neighbourX), Math.abs(neighbourZ)) > radius) { -+ // don't enqueue out of range -+ continue; -+ } -+ -+ if (!seen.add(neighbour)) { -+ continue; -+ } -+ -+ queue.addLast(neighbour); -+ } -+ } -+ -+ return ret; -+ } -+ -+ // doesn't appear worth optimising this function now, even though it's 70% of the call -+ private static CustomLongArray spread(final CustomLongArray input, final int size) { -+ final LongLinkedOpenHashSet notAdded = new LongLinkedOpenHashSet(input); -+ final CustomLongArray added = new CustomLongArray(size); -+ -+ while (!notAdded.isEmpty()) { -+ if (added.isEmpty()) { -+ added.addUnchecked(notAdded.removeLastLong()); -+ continue; -+ } -+ -+ long maxChunk = -1L; -+ int maxDist = 0; -+ -+ // select the chunk from the not yet added set that has the largest minimum distance from -+ // the current set of added chunks -+ -+ for (final LongIterator iterator = notAdded.iterator(); iterator.hasNext();) { -+ final long chunkKey = iterator.nextLong(); -+ final int chunkX = CoordinateUtils.getChunkX(chunkKey); -+ final int chunkZ = CoordinateUtils.getChunkZ(chunkKey); -+ -+ int minDist = Integer.MAX_VALUE; -+ -+ final int len = added.size(); -+ final long[] addedArr = added.elements(); -+ Objects.checkFromToIndex(0, len, addedArr.length); -+ for (int i = 0; i < len; ++i) { -+ final long addedKey = addedArr[i]; -+ final int addedX = CoordinateUtils.getChunkX(addedKey); -+ final int addedZ = CoordinateUtils.getChunkZ(addedKey); -+ -+ // here we use square distance because chunk generation uses neighbours in a square radius -+ final int dist = Math.max(Math.abs(addedX - chunkX), Math.abs(addedZ - chunkZ)); -+ -+ minDist = Math.min(dist, minDist); -+ } -+ -+ if (minDist > maxDist) { -+ maxDist = minDist; -+ maxChunk = chunkKey; -+ } -+ } -+ -+ // move the selected chunk from the not added set to the added set -+ -+ if (!notAdded.remove(maxChunk)) { -+ throw new IllegalStateException(); -+ } -+ -+ added.addUnchecked(maxChunk); -+ } -+ -+ return added; -+ } -+} -diff --git a/src/main/java/io/papermc/paper/chunk/system/entity/EntityLookup.java b/src/main/java/io/papermc/paper/chunk/system/entity/EntityLookup.java -new file mode 100644 -index 0000000000000000000000000000000000000000..15ee41452992714108efe53b708b5a4e1da7c1ff ---- /dev/null -+++ b/src/main/java/io/papermc/paper/chunk/system/entity/EntityLookup.java -@@ -0,0 +1,902 @@ -+package io.papermc.paper.chunk.system.entity; -+ -+import com.destroystokyo.paper.util.maplist.EntityList; -+import com.mojang.logging.LogUtils; -+import io.papermc.paper.util.CoordinateUtils; -+import io.papermc.paper.util.TickThread; -+import io.papermc.paper.util.WorldUtil; -+import io.papermc.paper.world.ChunkEntitySlices; -+import it.unimi.dsi.fastutil.ints.Int2ReferenceOpenHashMap; -+import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap; -+import it.unimi.dsi.fastutil.objects.Object2ReferenceOpenHashMap; -+import net.minecraft.core.BlockPos; -+import io.papermc.paper.chunk.system.ChunkSystem; -+import net.minecraft.server.level.ChunkHolder; -+import net.minecraft.server.level.ServerLevel; -+import net.minecraft.util.AbortableIterationConsumer; -+import net.minecraft.util.Mth; -+import net.minecraft.world.entity.Entity; -+import net.minecraft.world.entity.EntityType; -+import net.minecraft.world.level.ChunkPos; -+import net.minecraft.world.level.entity.EntityInLevelCallback; -+import net.minecraft.world.level.entity.EntityTypeTest; -+import net.minecraft.world.level.entity.LevelCallback; -+import net.minecraft.server.level.FullChunkStatus; -+import net.minecraft.world.level.entity.LevelEntityGetter; -+import net.minecraft.world.level.entity.Visibility; -+import net.minecraft.world.phys.AABB; -+import net.minecraft.world.phys.Vec3; -+import org.jetbrains.annotations.NotNull; -+import org.jetbrains.annotations.Nullable; -+import org.slf4j.Logger; -+import java.util.ArrayList; -+import java.util.Arrays; -+import java.util.Iterator; -+import java.util.List; -+import java.util.NoSuchElementException; -+import java.util.UUID; -+import java.util.concurrent.locks.StampedLock; -+import java.util.function.Consumer; -+import java.util.function.Predicate; -+ -+public final class EntityLookup implements LevelEntityGetter { -+ -+ private static final Logger LOGGER = LogUtils.getClassLogger(); -+ -+ protected static final int REGION_SHIFT = 5; -+ protected static final int REGION_MASK = (1 << REGION_SHIFT) - 1; -+ protected static final int REGION_SIZE = 1 << REGION_SHIFT; -+ -+ public final ServerLevel world; -+ -+ private final StampedLock stateLock = new StampedLock(); -+ protected final Long2ObjectOpenHashMap regions = new Long2ObjectOpenHashMap<>(128, 0.5f); -+ -+ private final int minSection; // inclusive -+ private final int maxSection; // inclusive -+ private final LevelCallback worldCallback; -+ -+ private final StampedLock entityByLock = new StampedLock(); -+ private final Int2ReferenceOpenHashMap entityById = new Int2ReferenceOpenHashMap<>(); -+ private final Object2ReferenceOpenHashMap entityByUUID = new Object2ReferenceOpenHashMap<>(); -+ private final EntityList accessibleEntities = new EntityList(); -+ -+ public EntityLookup(final ServerLevel world, final LevelCallback worldCallback) { -+ this.world = world; -+ this.minSection = WorldUtil.getMinSection(world); -+ this.maxSection = WorldUtil.getMaxSection(world); -+ this.worldCallback = worldCallback; -+ } -+ -+ private static Entity maskNonAccessible(final Entity entity) { -+ if (entity == null) { -+ return null; -+ } -+ final Visibility visibility = EntityLookup.getEntityStatus(entity); -+ return visibility.isAccessible() ? entity : null; -+ } -+ -+ @Nullable -+ @Override -+ public Entity get(final int id) { -+ final long attempt = this.entityByLock.tryOptimisticRead(); -+ if (attempt != 0L) { -+ try { -+ final Entity ret = this.entityById.get(id); -+ -+ if (this.entityByLock.validate(attempt)) { -+ return maskNonAccessible(ret); -+ } -+ } catch (final Error error) { -+ throw error; -+ } catch (final Throwable thr) { -+ // ignore -+ } -+ } -+ -+ this.entityByLock.readLock(); -+ try { -+ return maskNonAccessible(this.entityById.get(id)); -+ } finally { -+ this.entityByLock.tryUnlockRead(); -+ } -+ } -+ -+ @Nullable -+ @Override -+ public Entity get(final UUID id) { -+ final long attempt = this.entityByLock.tryOptimisticRead(); -+ if (attempt != 0L) { -+ try { -+ final Entity ret = this.entityByUUID.get(id); -+ -+ if (this.entityByLock.validate(attempt)) { -+ return maskNonAccessible(ret); -+ } -+ } catch (final Error error) { -+ throw error; -+ } catch (final Throwable thr) { -+ // ignore -+ } -+ } -+ -+ this.entityByLock.readLock(); -+ try { -+ return maskNonAccessible(this.entityByUUID.get(id)); -+ } finally { -+ this.entityByLock.tryUnlockRead(); -+ } -+ } -+ -+ public boolean hasEntity(final UUID uuid) { -+ return this.get(uuid) != null; -+ } -+ -+ public String getDebugInfo() { -+ return "count_id:" + this.entityById.size() + ",count_uuid:" + this.entityByUUID.size() + ",region_count:" + this.regions.size(); -+ } -+ -+ static final class ArrayIterable implements Iterable { -+ -+ private final T[] array; -+ private final int off; -+ private final int length; -+ -+ public ArrayIterable(final T[] array, final int off, final int length) { -+ this.array = array; -+ this.off = off; -+ this.length = length; -+ if (length > array.length) { -+ throw new IllegalArgumentException("Length must be no greater-than the array length"); -+ } -+ } -+ -+ @NotNull -+ @Override -+ public Iterator iterator() { -+ return new ArrayIterator<>(this.array, this.off, this.length); -+ } -+ -+ static final class ArrayIterator implements Iterator { -+ -+ private final T[] array; -+ private int off; -+ private final int length; -+ -+ public ArrayIterator(final T[] array, final int off, final int length) { -+ this.array = array; -+ this.off = off; -+ this.length = length; -+ } -+ -+ @Override -+ public boolean hasNext() { -+ return this.off < this.length; -+ } -+ -+ @Override -+ public T next() { -+ if (this.off >= this.length) { -+ throw new NoSuchElementException(); -+ } -+ return this.array[this.off++]; -+ } -+ -+ @Override -+ public void remove() { -+ throw new UnsupportedOperationException(); -+ } -+ } -+ } -+ -+ @Override -+ public Iterable getAll() { -+ return new ArrayIterable<>(this.accessibleEntities.getRawData(), 0, this.accessibleEntities.size()); -+ } -+ -+ public Entity[] getAllCopy() { -+ return Arrays.copyOf(this.accessibleEntities.getRawData(), this.accessibleEntities.size(), Entity[].class); -+ } -+ -+ @Override -+ public void get(final EntityTypeTest filter, final AbortableIterationConsumer action) { -+ final Int2ReferenceOpenHashMap entityCopy; -+ -+ this.entityByLock.readLock(); -+ try { -+ entityCopy = this.entityById.clone(); -+ } finally { -+ this.entityByLock.tryUnlockRead(); -+ } -+ for (final Entity entity : entityCopy.values()) { -+ final Visibility visibility = EntityLookup.getEntityStatus(entity); -+ if (!visibility.isAccessible()) { -+ continue; -+ } -+ final U casted = filter.tryCast(entity); -+ if (casted != null && action.accept(casted).shouldAbort()) { -+ break; -+ } -+ } -+ } -+ -+ @Override -+ public void get(final AABB box, final Consumer action) { -+ List entities = new ArrayList<>(); -+ this.getEntitiesWithoutDragonParts(null, box, entities, null); -+ for (int i = 0, len = entities.size(); i < len; ++i) { -+ action.accept(entities.get(i)); -+ } -+ } -+ -+ @Override -+ public void get(final EntityTypeTest filter, final AABB box, final AbortableIterationConsumer action) { -+ List entities = new ArrayList<>(); -+ this.getEntitiesWithoutDragonParts(null, box, entities, null); -+ for (int i = 0, len = entities.size(); i < len; ++i) { -+ final U casted = filter.tryCast(entities.get(i)); -+ if (casted != null && action.accept(casted).shouldAbort()) { -+ break; -+ } -+ } -+ } -+ -+ public void entityStatusChange(final Entity entity, final ChunkEntitySlices slices, final Visibility oldVisibility, final Visibility newVisibility, final boolean moved, -+ final boolean created, final boolean destroyed) { -+ TickThread.ensureTickThread(entity, "Entity status change must only happen on the main thread"); -+ -+ if (entity.updatingSectionStatus) { -+ // recursive status update -+ LOGGER.error("Cannot recursively update entity chunk status for entity " + entity, new Throwable()); -+ return; -+ } -+ -+ final boolean entityStatusUpdateBefore = slices == null ? false : slices.startPreventingStatusUpdates(); -+ -+ if (entityStatusUpdateBefore) { -+ LOGGER.error("Cannot update chunk status for entity " + entity + " since entity chunk (" + slices.chunkX + "," + slices.chunkZ + ") is receiving update", new Throwable()); -+ return; -+ } -+ -+ try { -+ final Boolean ticketBlockBefore = this.world.chunkTaskScheduler.chunkHolderManager.blockTicketUpdates(); -+ try { -+ entity.updatingSectionStatus = true; -+ try { -+ if (created) { -+ EntityLookup.this.worldCallback.onCreated(entity); -+ } -+ -+ if (oldVisibility == newVisibility) { -+ if (moved && newVisibility.isAccessible()) { -+ EntityLookup.this.worldCallback.onSectionChange(entity); -+ } -+ return; -+ } -+ -+ if (newVisibility.ordinal() > oldVisibility.ordinal()) { -+ // status upgrade -+ if (!oldVisibility.isAccessible() && newVisibility.isAccessible()) { -+ this.accessibleEntities.add(entity); -+ EntityLookup.this.worldCallback.onTrackingStart(entity); -+ } -+ -+ if (!oldVisibility.isTicking() && newVisibility.isTicking()) { -+ EntityLookup.this.worldCallback.onTickingStart(entity); -+ } -+ } else { -+ // status downgrade -+ if (oldVisibility.isTicking() && !newVisibility.isTicking()) { -+ EntityLookup.this.worldCallback.onTickingEnd(entity); -+ } -+ -+ if (oldVisibility.isAccessible() && !newVisibility.isAccessible()) { -+ this.accessibleEntities.remove(entity); -+ EntityLookup.this.worldCallback.onTrackingEnd(entity); -+ } -+ } -+ -+ if (moved && newVisibility.isAccessible()) { -+ EntityLookup.this.worldCallback.onSectionChange(entity); -+ } -+ -+ if (destroyed) { -+ EntityLookup.this.worldCallback.onDestroyed(entity); -+ } -+ } finally { -+ entity.updatingSectionStatus = false; -+ } -+ } finally { -+ this.world.chunkTaskScheduler.chunkHolderManager.unblockTicketUpdates(ticketBlockBefore); -+ } -+ } finally { -+ if (slices != null) { -+ slices.stopPreventingStatusUpdates(false); -+ } -+ } -+ } -+ -+ public void chunkStatusChange(final int x, final int z, final FullChunkStatus newStatus) { -+ this.getChunk(x, z).updateStatus(newStatus, this); -+ } -+ -+ public void addLegacyChunkEntities(final List entities, final ChunkPos forChunk) { -+ this.addEntityChunk(entities, forChunk, true); -+ } -+ -+ public void addEntityChunkEntities(final List entities, final ChunkPos forChunk) { -+ this.addEntityChunk(entities, forChunk, true); -+ } -+ -+ public void addWorldGenChunkEntities(final List entities, final ChunkPos forChunk) { -+ this.addEntityChunk(entities, forChunk, false); -+ } -+ -+ private void addRecursivelySafe(final Entity root, final boolean fromDisk) { -+ if (!this.addEntity(root, fromDisk)) { -+ // possible we are a passenger, and so should dismount from any valid entity in the world -+ root.stopRiding(true); -+ return; -+ } -+ for (final Entity passenger : root.getPassengers()) { -+ this.addRecursivelySafe(passenger, fromDisk); -+ } -+ } -+ -+ private void addEntityChunk(final List entities, final ChunkPos forChunk, final boolean fromDisk) { -+ for (int i = 0, len = entities.size(); i < len; ++i) { -+ final Entity entity = entities.get(i); -+ if (entity.isPassenger()) { -+ continue; -+ } -+ -+ if (!entity.chunkPosition().equals(forChunk)) { -+ LOGGER.warn("Root entity " + entity + " is outside of serialized chunk " + forChunk); -+ // can't set removed here, as we may not own the chunk position -+ // skip the entity -+ continue; -+ } -+ -+ final Vec3 rootPosition = entity.position(); -+ -+ // always adjust positions before adding passengers in case plugins access the entity, and so that -+ // they are added to the right entity chunk -+ for (final Entity passenger : entity.getIndirectPassengers()) { -+ if (!passenger.chunkPosition().equals(forChunk)) { -+ passenger.setPosRaw(rootPosition.x, rootPosition.y, rootPosition.z, true); -+ } -+ } -+ -+ this.addRecursivelySafe(entity, fromDisk); -+ } -+ } -+ -+ public boolean addNewEntity(final Entity entity) { -+ return this.addEntity(entity, false); -+ } -+ -+ public static Visibility getEntityStatus(final Entity entity) { -+ if (entity.isAlwaysTicking()) { -+ return Visibility.TICKING; -+ } -+ final FullChunkStatus entityStatus = entity.chunkStatus; -+ return Visibility.fromFullChunkStatus(entityStatus == null ? FullChunkStatus.INACCESSIBLE : entityStatus); -+ } -+ -+ private boolean addEntity(final Entity entity, final boolean fromDisk) { -+ final BlockPos pos = entity.blockPosition(); -+ final int sectionX = pos.getX() >> 4; -+ final int sectionY = Mth.clamp(pos.getY() >> 4, this.minSection, this.maxSection); -+ final int sectionZ = pos.getZ() >> 4; -+ TickThread.ensureTickThread(this.world, sectionX, sectionZ, "Cannot add entity off-main thread"); -+ -+ if (entity.isRemoved()) { -+ LOGGER.warn("Refusing to add removed entity: " + entity); -+ return false; -+ } -+ -+ if (entity.updatingSectionStatus) { -+ LOGGER.warn("Entity " + entity + " is currently prevented from being added/removed to world since it is processing section status updates", new Throwable()); -+ return false; -+ } -+ -+ if (fromDisk) { -+ ChunkSystem.onEntityPreAdd(this.world, entity); -+ if (entity.isRemoved()) { -+ // removed from checkDupeUUID call -+ return false; -+ } -+ } -+ -+ this.entityByLock.writeLock(); -+ try { -+ if (this.entityById.containsKey(entity.getId())) { -+ LOGGER.warn("Entity id already exists: " + entity.getId() + ", mapped to " + this.entityById.get(entity.getId()) + ", can't add " + entity); -+ return false; -+ } -+ if (this.entityByUUID.containsKey(entity.getUUID())) { -+ LOGGER.warn("Entity uuid already exists: " + entity.getUUID() + ", mapped to " + this.entityByUUID.get(entity.getUUID()) + ", can't add " + entity); -+ return false; -+ } -+ this.entityById.put(entity.getId(), entity); -+ this.entityByUUID.put(entity.getUUID(), entity); -+ } finally { -+ this.entityByLock.tryUnlockWrite(); -+ } -+ -+ entity.sectionX = sectionX; -+ entity.sectionY = sectionY; -+ entity.sectionZ = sectionZ; -+ final ChunkEntitySlices slices = this.getOrCreateChunk(sectionX, sectionZ); -+ if (!slices.addEntity(entity, sectionY)) { -+ LOGGER.warn("Entity " + entity + " added to world '" + this.world.getWorld().getName() + "', but was already contained in entity chunk (" + sectionX + "," + sectionZ + ")"); -+ } -+ -+ entity.setLevelCallback(new EntityCallback(entity)); -+ -+ this.entityStatusChange(entity, slices, Visibility.HIDDEN, getEntityStatus(entity), false, !fromDisk, false); -+ -+ return true; -+ } -+ -+ public boolean canRemoveEntity(final Entity entity) { -+ if (entity.updatingSectionStatus) { -+ return false; -+ } -+ -+ final int sectionX = entity.sectionX; -+ final int sectionZ = entity.sectionZ; -+ final ChunkEntitySlices slices = this.getChunk(sectionX, sectionZ); -+ return slices == null || !slices.isPreventingStatusUpdates(); -+ } -+ -+ private void removeEntity(final Entity entity) { -+ final int sectionX = entity.sectionX; -+ final int sectionY = entity.sectionY; -+ final int sectionZ = entity.sectionZ; -+ TickThread.ensureTickThread(this.world, sectionX, sectionZ, "Cannot remove entity off-main"); -+ if (!entity.isRemoved()) { -+ throw new IllegalStateException("Only call Entity#setRemoved to remove an entity"); -+ } -+ final ChunkEntitySlices slices = this.getChunk(sectionX, sectionZ); -+ // all entities should be in a chunk -+ if (slices == null) { -+ LOGGER.warn("Cannot remove entity " + entity + " from null entity slices (" + sectionX + "," + sectionZ + ")"); -+ } else { -+ if (slices.isPreventingStatusUpdates()) { -+ throw new IllegalStateException("Attempting to remove entity " + entity + " from entity slices (" + sectionX + "," + sectionZ + ") that is receiving status updates"); -+ } -+ if (!slices.removeEntity(entity, sectionY)) { -+ LOGGER.warn("Failed to remove entity " + entity + " from entity slices (" + sectionX + "," + sectionZ + ")"); -+ } -+ } -+ entity.sectionX = entity.sectionY = entity.sectionZ = Integer.MIN_VALUE; -+ -+ this.entityByLock.writeLock(); -+ try { -+ if (!this.entityById.remove(entity.getId(), entity)) { -+ LOGGER.warn("Failed to remove entity " + entity + " by id, current entity mapped: " + this.entityById.get(entity.getId())); -+ } -+ if (!this.entityByUUID.remove(entity.getUUID(), entity)) { -+ LOGGER.warn("Failed to remove entity " + entity + " by uuid, current entity mapped: " + this.entityByUUID.get(entity.getUUID())); -+ } -+ } finally { -+ this.entityByLock.tryUnlockWrite(); -+ } -+ } -+ -+ private ChunkEntitySlices moveEntity(final Entity entity) { -+ // ensure we own the entity -+ TickThread.ensureTickThread(entity, "Cannot move entity off-main"); -+ -+ final BlockPos newPos = entity.blockPosition(); -+ final int newSectionX = newPos.getX() >> 4; -+ final int newSectionY = Mth.clamp(newPos.getY() >> 4, this.minSection, this.maxSection); -+ final int newSectionZ = newPos.getZ() >> 4; -+ -+ if (newSectionX == entity.sectionX && newSectionY == entity.sectionY && newSectionZ == entity.sectionZ) { -+ return null; -+ } -+ -+ // ensure the new section is owned by this tick thread -+ TickThread.ensureTickThread(this.world, newSectionX, newSectionZ, "Cannot move entity off-main"); -+ -+ // ensure the old section is owned by this tick thread -+ TickThread.ensureTickThread(this.world, entity.sectionX, entity.sectionZ, "Cannot move entity off-main"); -+ -+ final ChunkEntitySlices old = this.getChunk(entity.sectionX, entity.sectionZ); -+ final ChunkEntitySlices slices = this.getOrCreateChunk(newSectionX, newSectionZ); -+ -+ if (!old.removeEntity(entity, entity.sectionY)) { -+ LOGGER.warn("Could not remove entity " + entity + " from its old chunk section (" + entity.sectionX + "," + entity.sectionY + "," + entity.sectionZ + ") since it was not contained in the section"); -+ } -+ -+ if (!slices.addEntity(entity, newSectionY)) { -+ LOGGER.warn("Could not add entity " + entity + " to its new chunk section (" + newSectionX + "," + newSectionY + "," + newSectionZ + ") as it is already contained in the section"); -+ } -+ -+ entity.sectionX = newSectionX; -+ entity.sectionY = newSectionY; -+ entity.sectionZ = newSectionZ; -+ -+ return slices; -+ } -+ -+ public void getEntitiesWithoutDragonParts(final Entity except, final AABB box, final List into, final Predicate predicate) { -+ final int minChunkX = (Mth.floor(box.minX) - 2) >> 4; -+ final int minChunkZ = (Mth.floor(box.minZ) - 2) >> 4; -+ final int maxChunkX = (Mth.floor(box.maxX) + 2) >> 4; -+ final int maxChunkZ = (Mth.floor(box.maxZ) + 2) >> 4; -+ -+ final int minRegionX = minChunkX >> REGION_SHIFT; -+ final int minRegionZ = minChunkZ >> REGION_SHIFT; -+ final int maxRegionX = maxChunkX >> REGION_SHIFT; -+ final int maxRegionZ = maxChunkZ >> REGION_SHIFT; -+ -+ for (int currRegionZ = minRegionZ; currRegionZ <= maxRegionZ; ++currRegionZ) { -+ final int minZ = currRegionZ == minRegionZ ? minChunkZ & REGION_MASK : 0; -+ final int maxZ = currRegionZ == maxRegionZ ? maxChunkZ & REGION_MASK : REGION_MASK; -+ -+ for (int currRegionX = minRegionX; currRegionX <= maxRegionX; ++currRegionX) { -+ final ChunkSlicesRegion region = this.getRegion(currRegionX, currRegionZ); -+ -+ if (region == null) { -+ continue; -+ } -+ -+ final int minX = currRegionX == minRegionX ? minChunkX & REGION_MASK : 0; -+ final int maxX = currRegionX == maxRegionX ? maxChunkX & REGION_MASK : REGION_MASK; -+ -+ for (int currZ = minZ; currZ <= maxZ; ++currZ) { -+ for (int currX = minX; currX <= maxX; ++currX) { -+ final ChunkEntitySlices chunk = region.get(currX | (currZ << REGION_SHIFT)); -+ if (chunk == null || !chunk.status.isOrAfter(FullChunkStatus.FULL)) { -+ continue; -+ } -+ -+ chunk.getEntitiesWithoutDragonParts(except, box, into, predicate); -+ } -+ } -+ } -+ } -+ } -+ -+ public void getEntities(final Entity except, final AABB box, final List into, final Predicate predicate) { -+ final int minChunkX = (Mth.floor(box.minX) - 2) >> 4; -+ final int minChunkZ = (Mth.floor(box.minZ) - 2) >> 4; -+ final int maxChunkX = (Mth.floor(box.maxX) + 2) >> 4; -+ final int maxChunkZ = (Mth.floor(box.maxZ) + 2) >> 4; -+ -+ final int minRegionX = minChunkX >> REGION_SHIFT; -+ final int minRegionZ = minChunkZ >> REGION_SHIFT; -+ final int maxRegionX = maxChunkX >> REGION_SHIFT; -+ final int maxRegionZ = maxChunkZ >> REGION_SHIFT; -+ -+ for (int currRegionZ = minRegionZ; currRegionZ <= maxRegionZ; ++currRegionZ) { -+ final int minZ = currRegionZ == minRegionZ ? minChunkZ & REGION_MASK : 0; -+ final int maxZ = currRegionZ == maxRegionZ ? maxChunkZ & REGION_MASK : REGION_MASK; -+ -+ for (int currRegionX = minRegionX; currRegionX <= maxRegionX; ++currRegionX) { -+ final ChunkSlicesRegion region = this.getRegion(currRegionX, currRegionZ); -+ -+ if (region == null) { -+ continue; -+ } -+ -+ final int minX = currRegionX == minRegionX ? minChunkX & REGION_MASK : 0; -+ final int maxX = currRegionX == maxRegionX ? maxChunkX & REGION_MASK : REGION_MASK; -+ -+ for (int currZ = minZ; currZ <= maxZ; ++currZ) { -+ for (int currX = minX; currX <= maxX; ++currX) { -+ final ChunkEntitySlices chunk = region.get(currX | (currZ << REGION_SHIFT)); -+ if (chunk == null || !chunk.status.isOrAfter(FullChunkStatus.FULL)) { -+ continue; -+ } -+ -+ chunk.getEntities(except, box, into, predicate); -+ } -+ } -+ } -+ } -+ } -+ -+ public void getHardCollidingEntities(final Entity except, final AABB box, final List into, final Predicate predicate) { -+ final int minChunkX = (Mth.floor(box.minX) - 2) >> 4; -+ final int minChunkZ = (Mth.floor(box.minZ) - 2) >> 4; -+ final int maxChunkX = (Mth.floor(box.maxX) + 2) >> 4; -+ final int maxChunkZ = (Mth.floor(box.maxZ) + 2) >> 4; -+ -+ final int minRegionX = minChunkX >> REGION_SHIFT; -+ final int minRegionZ = minChunkZ >> REGION_SHIFT; -+ final int maxRegionX = maxChunkX >> REGION_SHIFT; -+ final int maxRegionZ = maxChunkZ >> REGION_SHIFT; -+ -+ for (int currRegionZ = minRegionZ; currRegionZ <= maxRegionZ; ++currRegionZ) { -+ final int minZ = currRegionZ == minRegionZ ? minChunkZ & REGION_MASK : 0; -+ final int maxZ = currRegionZ == maxRegionZ ? maxChunkZ & REGION_MASK : REGION_MASK; -+ -+ for (int currRegionX = minRegionX; currRegionX <= maxRegionX; ++currRegionX) { -+ final ChunkSlicesRegion region = this.getRegion(currRegionX, currRegionZ); -+ -+ if (region == null) { -+ continue; -+ } -+ -+ final int minX = currRegionX == minRegionX ? minChunkX & REGION_MASK : 0; -+ final int maxX = currRegionX == maxRegionX ? maxChunkX & REGION_MASK : REGION_MASK; -+ -+ for (int currZ = minZ; currZ <= maxZ; ++currZ) { -+ for (int currX = minX; currX <= maxX; ++currX) { -+ final ChunkEntitySlices chunk = region.get(currX | (currZ << REGION_SHIFT)); -+ if (chunk == null || !chunk.status.isOrAfter(FullChunkStatus.FULL)) { -+ continue; -+ } -+ -+ chunk.getHardCollidingEntities(except, box, into, predicate); -+ } -+ } -+ } -+ } -+ } -+ -+ public void getEntities(final EntityType type, final AABB box, final List into, -+ final Predicate predicate) { -+ final int minChunkX = (Mth.floor(box.minX) - 2) >> 4; -+ final int minChunkZ = (Mth.floor(box.minZ) - 2) >> 4; -+ final int maxChunkX = (Mth.floor(box.maxX) + 2) >> 4; -+ final int maxChunkZ = (Mth.floor(box.maxZ) + 2) >> 4; -+ -+ final int minRegionX = minChunkX >> REGION_SHIFT; -+ final int minRegionZ = minChunkZ >> REGION_SHIFT; -+ final int maxRegionX = maxChunkX >> REGION_SHIFT; -+ final int maxRegionZ = maxChunkZ >> REGION_SHIFT; -+ -+ for (int currRegionZ = minRegionZ; currRegionZ <= maxRegionZ; ++currRegionZ) { -+ final int minZ = currRegionZ == minRegionZ ? minChunkZ & REGION_MASK : 0; -+ final int maxZ = currRegionZ == maxRegionZ ? maxChunkZ & REGION_MASK : REGION_MASK; -+ -+ for (int currRegionX = minRegionX; currRegionX <= maxRegionX; ++currRegionX) { -+ final ChunkSlicesRegion region = this.getRegion(currRegionX, currRegionZ); -+ -+ if (region == null) { -+ continue; -+ } -+ -+ final int minX = currRegionX == minRegionX ? minChunkX & REGION_MASK : 0; -+ final int maxX = currRegionX == maxRegionX ? maxChunkX & REGION_MASK : REGION_MASK; -+ -+ for (int currZ = minZ; currZ <= maxZ; ++currZ) { -+ for (int currX = minX; currX <= maxX; ++currX) { -+ final ChunkEntitySlices chunk = region.get(currX | (currZ << REGION_SHIFT)); -+ if (chunk == null || !chunk.status.isOrAfter(FullChunkStatus.FULL)) { -+ continue; -+ } -+ -+ chunk.getEntities(type, box, (List)into, (Predicate)predicate); -+ } -+ } -+ } -+ } -+ } -+ -+ public void getEntities(final Class clazz, final Entity except, final AABB box, final List into, -+ final Predicate predicate) { -+ final int minChunkX = (Mth.floor(box.minX) - 2) >> 4; -+ final int minChunkZ = (Mth.floor(box.minZ) - 2) >> 4; -+ final int maxChunkX = (Mth.floor(box.maxX) + 2) >> 4; -+ final int maxChunkZ = (Mth.floor(box.maxZ) + 2) >> 4; -+ -+ final int minRegionX = minChunkX >> REGION_SHIFT; -+ final int minRegionZ = minChunkZ >> REGION_SHIFT; -+ final int maxRegionX = maxChunkX >> REGION_SHIFT; -+ final int maxRegionZ = maxChunkZ >> REGION_SHIFT; -+ -+ for (int currRegionZ = minRegionZ; currRegionZ <= maxRegionZ; ++currRegionZ) { -+ final int minZ = currRegionZ == minRegionZ ? minChunkZ & REGION_MASK : 0; -+ final int maxZ = currRegionZ == maxRegionZ ? maxChunkZ & REGION_MASK : REGION_MASK; -+ -+ for (int currRegionX = minRegionX; currRegionX <= maxRegionX; ++currRegionX) { -+ final ChunkSlicesRegion region = this.getRegion(currRegionX, currRegionZ); -+ -+ if (region == null) { -+ continue; -+ } -+ -+ final int minX = currRegionX == minRegionX ? minChunkX & REGION_MASK : 0; -+ final int maxX = currRegionX == maxRegionX ? maxChunkX & REGION_MASK : REGION_MASK; -+ -+ for (int currZ = minZ; currZ <= maxZ; ++currZ) { -+ for (int currX = minX; currX <= maxX; ++currX) { -+ final ChunkEntitySlices chunk = region.get(currX | (currZ << REGION_SHIFT)); -+ if (chunk == null || !chunk.status.isOrAfter(FullChunkStatus.FULL)) { -+ continue; -+ } -+ -+ chunk.getEntities(clazz, except, box, into, predicate); -+ } -+ } -+ } -+ } -+ } -+ -+ public void entitySectionLoad(final int chunkX, final int chunkZ, final ChunkEntitySlices slices) { -+ TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Cannot load in entity section off-main"); -+ synchronized (this) { -+ final ChunkEntitySlices curr = this.getChunk(chunkX, chunkZ); -+ if (curr != null) { -+ this.removeChunk(chunkX, chunkZ); -+ -+ curr.mergeInto(slices); -+ -+ this.addChunk(chunkX, chunkZ, slices); -+ } else { -+ this.addChunk(chunkX, chunkZ, slices); -+ } -+ } -+ } -+ -+ public void entitySectionUnload(final int chunkX, final int chunkZ) { -+ TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Cannot unload entity section off-main"); -+ this.removeChunk(chunkX, chunkZ); -+ } -+ -+ public ChunkEntitySlices getChunk(final int chunkX, final int chunkZ) { -+ final ChunkSlicesRegion region = this.getRegion(chunkX >> REGION_SHIFT, chunkZ >> REGION_SHIFT); -+ if (region == null) { -+ return null; -+ } -+ -+ return region.get((chunkX & REGION_MASK) | ((chunkZ & REGION_MASK) << REGION_SHIFT)); -+ } -+ -+ public ChunkEntitySlices getOrCreateChunk(final int chunkX, final int chunkZ) { -+ final ChunkSlicesRegion region = this.getRegion(chunkX >> REGION_SHIFT, chunkZ >> REGION_SHIFT); -+ ChunkEntitySlices ret; -+ if (region == null || (ret = region.get((chunkX & REGION_MASK) | ((chunkZ & REGION_MASK) << REGION_SHIFT))) == null) { -+ // loadInEntityChunk will call addChunk for us -+ return this.world.chunkTaskScheduler.chunkHolderManager.getOrCreateEntityChunk(chunkX, chunkZ, true); -+ } -+ -+ return ret; -+ } -+ -+ public ChunkSlicesRegion getRegion(final int regionX, final int regionZ) { -+ final long key = CoordinateUtils.getChunkKey(regionX, regionZ); -+ final long attempt = this.stateLock.tryOptimisticRead(); -+ if (attempt != 0L) { -+ try { -+ final ChunkSlicesRegion ret = this.regions.get(key); -+ -+ if (this.stateLock.validate(attempt)) { -+ return ret; -+ } -+ } catch (final Error error) { -+ throw error; -+ } catch (final Throwable thr) { -+ // ignore -+ } -+ } -+ -+ this.stateLock.readLock(); -+ try { -+ return this.regions.get(key); -+ } finally { -+ this.stateLock.tryUnlockRead(); -+ } -+ } -+ -+ private synchronized void removeChunk(final int chunkX, final int chunkZ) { -+ final long key = CoordinateUtils.getChunkKey(chunkX >> REGION_SHIFT, chunkZ >> REGION_SHIFT); -+ final int relIndex = (chunkX & REGION_MASK) | ((chunkZ & REGION_MASK) << REGION_SHIFT); -+ -+ final ChunkSlicesRegion region = this.regions.get(key); -+ final int remaining = region.remove(relIndex); -+ -+ if (remaining == 0) { -+ this.stateLock.writeLock(); -+ try { -+ this.regions.remove(key); -+ } finally { -+ this.stateLock.tryUnlockWrite(); -+ } -+ } -+ } -+ -+ public synchronized void addChunk(final int chunkX, final int chunkZ, final ChunkEntitySlices slices) { -+ final long key = CoordinateUtils.getChunkKey(chunkX >> REGION_SHIFT, chunkZ >> REGION_SHIFT); -+ final int relIndex = (chunkX & REGION_MASK) | ((chunkZ & REGION_MASK) << REGION_SHIFT); -+ -+ ChunkSlicesRegion region = this.regions.get(key); -+ if (region != null) { -+ region.add(relIndex, slices); -+ } else { -+ region = new ChunkSlicesRegion(); -+ region.add(relIndex, slices); -+ this.stateLock.writeLock(); -+ try { -+ this.regions.put(key, region); -+ } finally { -+ this.stateLock.tryUnlockWrite(); -+ } -+ } -+ } -+ -+ public static final class ChunkSlicesRegion { -+ -+ protected final ChunkEntitySlices[] slices = new ChunkEntitySlices[REGION_SIZE * REGION_SIZE]; -+ protected int sliceCount; -+ -+ public ChunkEntitySlices get(final int index) { -+ return this.slices[index]; -+ } -+ -+ public int remove(final int index) { -+ final ChunkEntitySlices slices = this.slices[index]; -+ if (slices == null) { -+ throw new IllegalStateException(); -+ } -+ -+ this.slices[index] = null; -+ -+ return --this.sliceCount; -+ } -+ -+ public void add(final int index, final ChunkEntitySlices slices) { -+ final ChunkEntitySlices curr = this.slices[index]; -+ if (curr != null) { -+ throw new IllegalStateException(); -+ } -+ -+ this.slices[index] = slices; -+ -+ ++this.sliceCount; -+ } -+ } -+ -+ private final class EntityCallback implements EntityInLevelCallback { -+ -+ public final Entity entity; -+ -+ public EntityCallback(final Entity entity) { -+ this.entity = entity; -+ } -+ -+ @Override -+ public void onMove() { -+ final Entity entity = this.entity; -+ final Visibility oldVisibility = getEntityStatus(entity); -+ final ChunkEntitySlices newSlices = EntityLookup.this.moveEntity(this.entity); -+ if (newSlices == null) { -+ // no new section, so didn't change sections -+ return; -+ } -+ final Visibility newVisibility = getEntityStatus(entity); -+ -+ EntityLookup.this.entityStatusChange(entity, newSlices, oldVisibility, newVisibility, true, false, false); -+ } -+ -+ @Override -+ public void onRemove(final Entity.RemovalReason reason) { -+ final Entity entity = this.entity; -+ TickThread.ensureTickThread(entity, "Cannot remove entity off-main"); // Paper - rewrite chunk system -+ final Visibility tickingState = EntityLookup.getEntityStatus(entity); -+ -+ EntityLookup.this.removeEntity(entity); -+ -+ EntityLookup.this.entityStatusChange(entity, null, tickingState, Visibility.HIDDEN, false, false, reason.shouldDestroy()); -+ -+ this.entity.setLevelCallback(NoOpCallback.INSTANCE); -+ } -+ } -+ -+ private static final class NoOpCallback implements EntityInLevelCallback { -+ -+ public static final NoOpCallback INSTANCE = new NoOpCallback(); -+ -+ @Override -+ public void onMove() {} -+ -+ @Override -+ public void onRemove(final Entity.RemovalReason reason) {} -+ } -+} -diff --git a/src/main/java/io/papermc/paper/chunk/system/io/RegionFileIOThread.java b/src/main/java/io/papermc/paper/chunk/system/io/RegionFileIOThread.java -new file mode 100644 -index 0000000000000000000000000000000000000000..2096e57c025858519e7c46788993b9aac1ec60e8 ---- /dev/null -+++ b/src/main/java/io/papermc/paper/chunk/system/io/RegionFileIOThread.java -@@ -0,0 +1,1289 @@ -+package io.papermc.paper.chunk.system.io; -+ -+import ca.spottedleaf.concurrentutil.collection.MultiThreadedQueue; -+import ca.spottedleaf.concurrentutil.executor.Cancellable; -+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; -+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedQueueExecutorThread; -+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedThreadedTaskQueue; -+import ca.spottedleaf.concurrentutil.util.ConcurrentUtil; -+import com.mojang.logging.LogUtils; -+import io.papermc.paper.util.CoordinateUtils; -+import io.papermc.paper.util.TickThread; -+import it.unimi.dsi.fastutil.HashCommon; -+import net.minecraft.nbt.CompoundTag; -+import net.minecraft.server.level.ServerLevel; -+import net.minecraft.world.level.ChunkPos; -+import net.minecraft.world.level.chunk.storage.RegionFile; -+import net.minecraft.world.level.chunk.storage.RegionFileStorage; -+import org.slf4j.Logger; -+import java.io.IOException; -+import java.lang.invoke.VarHandle; -+import java.util.concurrent.CompletableFuture; -+import java.util.concurrent.CompletionException; -+import java.util.concurrent.ConcurrentHashMap; -+import java.util.concurrent.atomic.AtomicInteger; -+import java.util.function.BiConsumer; -+import java.util.function.BiFunction; -+import java.util.function.Consumer; -+import java.util.function.Function; -+ -+/** -+ * Prioritised RegionFile I/O executor, responsible for all RegionFile access. -+ *

-+ * All functions provided are MT-Safe, however certain ordering constraints are recommended: -+ *

    -+ *
  • -+ * Chunk saves may not occur for unloaded chunks. -+ *
    • -+ *
  • -+ * Tasks must be scheduled on the chunk scheduler thread. -+ *
    • -+ *
-+ * By following these constraints, no chunk data loss should occur with the exception of underlying I/O problems. -+ */ -+public final class RegionFileIOThread extends PrioritisedQueueExecutorThread { -+ -+ private static final Logger LOGGER = LogUtils.getClassLogger(); -+ -+ /** -+ * The kinds of region files controlled by the region file thread. Add more when needed, and ensure -+ * getControllerFor is updated. -+ */ -+ public static enum RegionFileType { -+ CHUNK_DATA, -+ POI_DATA, -+ ENTITY_DATA; -+ } -+ -+ protected static final RegionFileType[] CACHED_REGIONFILE_TYPES = RegionFileType.values(); -+ -+ private ChunkDataController getControllerFor(final ServerLevel world, final RegionFileType type) { -+ return switch (type) { -+ case CHUNK_DATA -> world.chunkDataControllerNew; -+ case POI_DATA -> world.poiDataControllerNew; -+ case ENTITY_DATA -> world.entityDataControllerNew; -+ default -> throw new IllegalStateException("Unknown controller type " + type); -+ }; -+ } -+ -+ /** -+ * Collects regionfile data for a certain chunk. -+ */ -+ public static final class RegionFileData { -+ -+ private final boolean[] hasResult = new boolean[CACHED_REGIONFILE_TYPES.length]; -+ private final CompoundTag[] data = new CompoundTag[CACHED_REGIONFILE_TYPES.length]; -+ private final Throwable[] throwables = new Throwable[CACHED_REGIONFILE_TYPES.length]; -+ -+ /** -+ * Sets the result associated with the specified regionfile type. Note that -+ * results can only be set once per regionfile type. -+ * -+ * @param type The regionfile type. -+ * @param data The result to set. -+ */ -+ public void setData(final RegionFileType type, final CompoundTag data) { -+ final int index = type.ordinal(); -+ -+ if (this.hasResult[index]) { -+ throw new IllegalArgumentException("Result already exists for type " + type); -+ } -+ this.hasResult[index] = true; -+ this.data[index] = data; -+ } -+ -+ /** -+ * Sets the result associated with the specified regionfile type. Note that -+ * results can only be set once per regionfile type. -+ * -+ * @param type The regionfile type. -+ * @param throwable The result to set. -+ */ -+ public void setThrowable(final RegionFileType type, final Throwable throwable) { -+ final int index = type.ordinal(); -+ -+ if (this.hasResult[index]) { -+ throw new IllegalArgumentException("Result already exists for type " + type); -+ } -+ this.hasResult[index] = true; -+ this.throwables[index] = throwable; -+ } -+ -+ /** -+ * Returns whether there is a result for the specified regionfile type. -+ * -+ * @param type Specified regionfile type. -+ * -+ * @return Whether a result exists for {@code type}. -+ */ -+ public boolean hasResult(final RegionFileType type) { -+ return this.hasResult[type.ordinal()]; -+ } -+ -+ /** -+ * Returns the data result for the regionfile type. -+ * -+ * @param type Specified regionfile type. -+ * -+ * @throws IllegalArgumentException If the result has not been set for {@code type}. -+ * @return The data result for the specified type. If the result is a {@code Throwable}, -+ * then returns {@code null}. -+ */ -+ public CompoundTag getData(final RegionFileType type) { -+ final int index = type.ordinal(); -+ -+ if (!this.hasResult[index]) { -+ throw new IllegalArgumentException("Result does not exist for type " + type); -+ } -+ -+ return this.data[index]; -+ } -+ -+ /** -+ * Returns the throwable result for the regionfile type. -+ * -+ * @param type Specified regionfile type. -+ * -+ * @throws IllegalArgumentException If the result has not been set for {@code type}. -+ * @return The throwable result for the specified type. If the result is an {@code CompoundTag}, -+ * then returns {@code null}. -+ */ -+ public Throwable getThrowable(final RegionFileType type) { -+ final int index = type.ordinal(); -+ -+ if (!this.hasResult[index]) { -+ throw new IllegalArgumentException("Result does not exist for type " + type); -+ } -+ -+ return this.throwables[index]; -+ } -+ } -+ -+ private static final Object INIT_LOCK = new Object(); -+ -+ static RegionFileIOThread[] threads; -+ -+ /* needs to be consistent given a set of parameters */ -+ static RegionFileIOThread selectThread(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type) { -+ if (threads == null) { -+ throw new IllegalStateException("Threads not initialised"); -+ } -+ -+ final int regionX = chunkX >> 5; -+ final int regionZ = chunkZ >> 5; -+ final int typeOffset = type.ordinal(); -+ -+ return threads[(System.identityHashCode(world) + regionX + regionZ + typeOffset) % threads.length]; -+ } -+ -+ /** -+ * Shuts down the I/O executor(s). Watis for all tasks to complete if specified. -+ * Tasks queued during this call might not be accepted, and tasks queued after will not be accepted. -+ * -+ * @param wait Whether to wait until all tasks have completed. -+ */ -+ public static void close(final boolean wait) { -+ for (int i = 0, len = threads.length; i < len; ++i) { -+ threads[i].close(false, true); -+ } -+ if (wait) { -+ RegionFileIOThread.flush(); -+ } -+ } -+ -+ public static long[] getExecutedTasks() { -+ final long[] ret = new long[threads.length]; -+ for (int i = 0, len = threads.length; i < len; ++i) { -+ ret[i] = threads[i].getTotalTasksExecuted(); -+ } -+ -+ return ret; -+ } -+ -+ public static long[] getTasksScheduled() { -+ final long[] ret = new long[threads.length]; -+ for (int i = 0, len = threads.length; i < len; ++i) { -+ ret[i] = threads[i].getTotalTasksScheduled(); -+ } -+ return ret; -+ } -+ -+ public static void flush() { -+ for (int i = 0, len = threads.length; i < len; ++i) { -+ threads[i].waitUntilAllExecuted(); -+ } -+ } -+ -+ public static void partialFlush(final int totalTasksRemaining) { -+ long failures = 1L; // start out at 0.25ms -+ -+ for (;;) { -+ final long[] executed = getExecutedTasks(); -+ final long[] scheduled = getTasksScheduled(); -+ -+ long sum = 0; -+ for (int i = 0; i < executed.length; ++i) { -+ sum += scheduled[i] - executed[i]; -+ } -+ -+ if (sum <= totalTasksRemaining) { -+ break; -+ } -+ -+ failures = ConcurrentUtil.linearLongBackoff(failures, 250_000L, 5_000_000L); // 500us, 5ms -+ } -+ } -+ -+ /** -+ * Inits the executor with the specified number of threads. -+ * -+ * @param threads Specified number of threads. -+ */ -+ public static void init(final int threads) { -+ synchronized (INIT_LOCK) { -+ if (RegionFileIOThread.threads != null) { -+ throw new IllegalStateException("Already initialised threads"); -+ } -+ -+ RegionFileIOThread.threads = new RegionFileIOThread[threads]; -+ -+ for (int i = 0; i < threads; ++i) { -+ RegionFileIOThread.threads[i] = new RegionFileIOThread(i); -+ RegionFileIOThread.threads[i].start(); -+ } -+ } -+ } -+ -+ private RegionFileIOThread(final int threadNumber) { -+ super(new PrioritisedThreadedTaskQueue(), (int)(1.0e6)); // 1.0ms spinwait time -+ this.setName("RegionFile I/O Thread #" + threadNumber); -+ this.setPriority(Thread.NORM_PRIORITY - 2); // we keep priority close to normal because threads can wait on us -+ this.setUncaughtExceptionHandler((final Thread thread, final Throwable thr) -> { -+ LOGGER.error("Uncaught exception thrown from I/O thread, report this! Thread: " + thread.getName(), thr); -+ }); -+ } -+ -+ /** -+ * Returns whether the current thread is a regionfile I/O executor. -+ * @return Whether the current thread is a regionfile I/O executor. -+ */ -+ public static boolean isRegionFileThread() { -+ return Thread.currentThread() instanceof RegionFileIOThread; -+ } -+ -+ /** -+ * Returns the priority associated with blocking I/O based on the current thread. The goal is to avoid -+ * dumb plugins from taking away priority from threads we consider crucial. -+ * @return The priroity to use with blocking I/O on the current thread. -+ */ -+ public static PrioritisedExecutor.Priority getIOBlockingPriorityForCurrentThread() { -+ if (TickThread.isTickThread()) { -+ return PrioritisedExecutor.Priority.BLOCKING; -+ } -+ return PrioritisedExecutor.Priority.HIGHEST; -+ } -+ -+ /** -+ * Returns the current {@code CompoundTag} pending for write for the specified chunk and regionfile type. -+ * Note that this does not copy the result, so do not modify the result returned. -+ * -+ * @param world Specified world. -+ * @param chunkX Specified chunk x. -+ * @param chunkZ Specified chunk z. -+ * @param type Specified regionfile type. -+ * -+ * @return The compound tag associated for the specified chunk. {@code null} if no write was pending, or if {@code null} is the write pending. -+ */ -+ public static CompoundTag getPendingWrite(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type) { -+ final RegionFileIOThread thread = RegionFileIOThread.selectThread(world, chunkX, chunkZ, type); -+ return thread.getPendingWriteInternal(world, chunkX, chunkZ, type); -+ } -+ -+ CompoundTag getPendingWriteInternal(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type) { -+ final ChunkDataController taskController = this.getControllerFor(world, type); -+ final ChunkDataTask task = taskController.tasks.get(Long.valueOf(CoordinateUtils.getChunkKey(chunkX, chunkZ))); -+ -+ if (task == null) { -+ return null; -+ } -+ -+ final CompoundTag ret = task.inProgressWrite; -+ -+ return ret == ChunkDataTask.NOTHING_TO_WRITE ? null : ret; -+ } -+ -+ /** -+ * Returns the priority for the specified regionfile type for the specified chunk. -+ * @param world Specified world. -+ * @param chunkX Specified chunk x. -+ * @param chunkZ Specified chunk z. -+ * @param type Specified regionfile type. -+ * @return The priority for the chunk -+ */ -+ public static PrioritisedExecutor.Priority getPriority(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type) { -+ final RegionFileIOThread thread = RegionFileIOThread.selectThread(world, chunkX, chunkZ, type); -+ return thread.getPriorityInternal(world, chunkX, chunkZ, type); -+ } -+ -+ PrioritisedExecutor.Priority getPriorityInternal(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type) { -+ final ChunkDataController taskController = this.getControllerFor(world, type); -+ final ChunkDataTask task = taskController.tasks.get(Long.valueOf(CoordinateUtils.getChunkKey(chunkX, chunkZ))); -+ -+ if (task == null) { -+ return PrioritisedExecutor.Priority.COMPLETING; -+ } -+ -+ return task.prioritisedTask.getPriority(); -+ } -+ -+ /** -+ * Sets the priority for all regionfile types for the specified chunk. Note that great care should -+ * be taken using this method, as there can be multiple tasks tied to the same chunk that want different -+ * priorities. -+ * -+ * @param world Specified world. -+ * @param chunkX Specified chunk x. -+ * @param chunkZ Specified chunk z. -+ * @param priority New priority. -+ * -+ * @see #raisePriority(ServerLevel, int, int, Priority) -+ * @see #raisePriority(ServerLevel, int, int, RegionFileType, Priority) -+ * @see #lowerPriority(ServerLevel, int, int, Priority) -+ * @see #lowerPriority(ServerLevel, int, int, RegionFileType, Priority) -+ */ -+ public static void setPriority(final ServerLevel world, final int chunkX, final int chunkZ, -+ final PrioritisedExecutor.Priority priority) { -+ for (final RegionFileType type : CACHED_REGIONFILE_TYPES) { -+ RegionFileIOThread.setPriority(world, chunkX, chunkZ, type, priority); -+ } -+ } -+ -+ /** -+ * Sets the priority for the specified regionfile type for the specified chunk. Note that great care should -+ * be taken using this method, as there can be multiple tasks tied to the same chunk that want different -+ * priorities. -+ * -+ * @param world Specified world. -+ * @param chunkX Specified chunk x. -+ * @param chunkZ Specified chunk z. -+ * @param type Specified regionfile type. -+ * @param priority New priority. -+ * -+ * @see #raisePriority(ServerLevel, int, int, Priority) -+ * @see #raisePriority(ServerLevel, int, int, RegionFileType, Priority) -+ * @see #lowerPriority(ServerLevel, int, int, Priority) -+ * @see #lowerPriority(ServerLevel, int, int, RegionFileType, Priority) -+ */ -+ public static void setPriority(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type, -+ final PrioritisedExecutor.Priority priority) { -+ final RegionFileIOThread thread = RegionFileIOThread.selectThread(world, chunkX, chunkZ, type); -+ thread.setPriorityInternal(world, chunkX, chunkZ, type, priority); -+ } -+ -+ void setPriorityInternal(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type, -+ final PrioritisedExecutor.Priority priority) { -+ final ChunkDataController taskController = this.getControllerFor(world, type); -+ final ChunkDataTask task = taskController.tasks.get(Long.valueOf(CoordinateUtils.getChunkKey(chunkX, chunkZ))); -+ -+ if (task != null) { -+ task.prioritisedTask.setPriority(priority); -+ } -+ } -+ -+ /** -+ * Raises the priority for all regionfile types for the specified chunk. -+ * -+ * @param world Specified world. -+ * @param chunkX Specified chunk x. -+ * @param chunkZ Specified chunk z. -+ * @param priority New priority. -+ * -+ * @see #setPriority(ServerLevel, int, int, Priority) -+ * @see #setPriority(ServerLevel, int, int, RegionFileType, Priority) -+ * @see #lowerPriority(ServerLevel, int, int, Priority) -+ * @see #lowerPriority(ServerLevel, int, int, RegionFileType, Priority) -+ */ -+ public static void raisePriority(final ServerLevel world, final int chunkX, final int chunkZ, -+ final PrioritisedExecutor.Priority priority) { -+ for (final RegionFileType type : CACHED_REGIONFILE_TYPES) { -+ RegionFileIOThread.raisePriority(world, chunkX, chunkZ, type, priority); -+ } -+ } -+ -+ /** -+ * Raises the priority for the specified regionfile type for the specified chunk. -+ * -+ * @param world Specified world. -+ * @param chunkX Specified chunk x. -+ * @param chunkZ Specified chunk z. -+ * @param type Specified regionfile type. -+ * @param priority New priority. -+ * -+ * @see #setPriority(ServerLevel, int, int, Priority) -+ * @see #setPriority(ServerLevel, int, int, RegionFileType, Priority) -+ * @see #lowerPriority(ServerLevel, int, int, Priority) -+ * @see #lowerPriority(ServerLevel, int, int, RegionFileType, Priority) -+ */ -+ public static void raisePriority(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type, -+ final PrioritisedExecutor.Priority priority) { -+ final RegionFileIOThread thread = RegionFileIOThread.selectThread(world, chunkX, chunkZ, type); -+ thread.raisePriorityInternal(world, chunkX, chunkZ, type, priority); -+ } -+ -+ void raisePriorityInternal(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type, -+ final PrioritisedExecutor.Priority priority) { -+ final ChunkDataController taskController = this.getControllerFor(world, type); -+ final ChunkDataTask task = taskController.tasks.get(Long.valueOf(CoordinateUtils.getChunkKey(chunkX, chunkZ))); -+ -+ if (task != null) { -+ task.prioritisedTask.raisePriority(priority); -+ } -+ } -+ -+ /** -+ * Lowers the priority for all regionfile types for the specified chunk. -+ * -+ * @param world Specified world. -+ * @param chunkX Specified chunk x. -+ * @param chunkZ Specified chunk z. -+ * @param priority New priority. -+ * -+ * @see #raisePriority(ServerLevel, int, int, Priority) -+ * @see #raisePriority(ServerLevel, int, int, RegionFileType, Priority) -+ * @see #setPriority(ServerLevel, int, int, Priority) -+ * @see #setPriority(ServerLevel, int, int, RegionFileType, Priority) -+ */ -+ public static void lowerPriority(final ServerLevel world, final int chunkX, final int chunkZ, -+ final PrioritisedExecutor.Priority priority) { -+ for (final RegionFileType type : CACHED_REGIONFILE_TYPES) { -+ RegionFileIOThread.lowerPriority(world, chunkX, chunkZ, type, priority); -+ } -+ } -+ -+ /** -+ * Lowers the priority for the specified regionfile type for the specified chunk. -+ * -+ * @param world Specified world. -+ * @param chunkX Specified chunk x. -+ * @param chunkZ Specified chunk z. -+ * @param type Specified regionfile type. -+ * @param priority New priority. -+ * -+ * @see #raisePriority(ServerLevel, int, int, Priority) -+ * @see #raisePriority(ServerLevel, int, int, RegionFileType, Priority) -+ * @see #setPriority(ServerLevel, int, int, Priority) -+ * @see #setPriority(ServerLevel, int, int, RegionFileType, Priority) -+ */ -+ public static void lowerPriority(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type, -+ final PrioritisedExecutor.Priority priority) { -+ final RegionFileIOThread thread = RegionFileIOThread.selectThread(world, chunkX, chunkZ, type); -+ thread.lowerPriorityInternal(world, chunkX, chunkZ, type, priority); -+ } -+ -+ void lowerPriorityInternal(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type, -+ final PrioritisedExecutor.Priority priority) { -+ final ChunkDataController taskController = this.getControllerFor(world, type); -+ final ChunkDataTask task = taskController.tasks.get(Long.valueOf(CoordinateUtils.getChunkKey(chunkX, chunkZ))); -+ -+ if (task != null) { -+ task.prioritisedTask.lowerPriority(priority); -+ } -+ } -+ -+ /** -+ * Schedules the chunk data to be written asynchronously. -+ *

-+ * Impl notes: -+ *

    -+ *
  • -+ * This function presumes a chunk load for the coordinates is not called during this function (anytime after is OK). This means -+ * saves must be scheduled before a chunk is unloaded. -+ *
    • -+ *
  • -+ * Writes may be called concurrently, although only the "later" write will go through. -+ *
    • -+ *
-+ * -+ * @param world Chunk's world -+ * @param chunkX Chunk's x coordinate -+ * @param chunkZ Chunk's z coordinate -+ * @param data Chunk's data -+ * @param type The regionfile type to write to. -+ * -+ * @throws IllegalStateException If the file io thread has shutdown. -+ */ -+ public static void scheduleSave(final ServerLevel world, final int chunkX, final int chunkZ, final CompoundTag data, -+ final RegionFileType type) { -+ RegionFileIOThread.scheduleSave(world, chunkX, chunkZ, data, type, PrioritisedExecutor.Priority.NORMAL); -+ } -+ -+ /** -+ * Schedules the chunk data to be written asynchronously. -+ *

-+ * Impl notes: -+ *

    -+ *
  • -+ * This function presumes a chunk load for the coordinates is not called during this function (anytime after is OK). This means -+ * saves must be scheduled before a chunk is unloaded. -+ *
    • -+ *
  • -+ * Writes may be called concurrently, although only the "later" write will go through. -+ *
    • -+ *
-+ * -+ * @param world Chunk's world -+ * @param chunkX Chunk's x coordinate -+ * @param chunkZ Chunk's z coordinate -+ * @param data Chunk's data -+ * @param type The regionfile type to write to. -+ * @param priority The minimum priority to schedule at. -+ * -+ * @throws IllegalStateException If the file io thread has shutdown. -+ */ -+ public static void scheduleSave(final ServerLevel world, final int chunkX, final int chunkZ, final CompoundTag data, -+ final RegionFileType type, final PrioritisedExecutor.Priority priority) { -+ final RegionFileIOThread thread = RegionFileIOThread.selectThread(world, chunkX, chunkZ, type); -+ thread.scheduleSaveInternal(world, chunkX, chunkZ, data, type, priority); -+ } -+ -+ void scheduleSaveInternal(final ServerLevel world, final int chunkX, final int chunkZ, final CompoundTag data, -+ final RegionFileType type, final PrioritisedExecutor.Priority priority) { -+ final ChunkDataController taskController = this.getControllerFor(world, type); -+ -+ final boolean[] created = new boolean[1]; -+ final ChunkCoordinate key = new ChunkCoordinate(CoordinateUtils.getChunkKey(chunkX, chunkZ)); -+ final ChunkDataTask task = taskController.tasks.compute(key, (final ChunkCoordinate keyInMap, final ChunkDataTask taskRunning) -> { -+ if (taskRunning == null || taskRunning.failedWrite) { -+ // no task is scheduled or the previous write failed - meaning we need to overwrite it -+ -+ // create task -+ final ChunkDataTask newTask = new ChunkDataTask(world, chunkX, chunkZ, taskController, RegionFileIOThread.this, priority); -+ newTask.inProgressWrite = data; -+ created[0] = true; -+ -+ return newTask; -+ } -+ -+ taskRunning.inProgressWrite = data; -+ -+ return taskRunning; -+ }); -+ -+ if (created[0]) { -+ task.prioritisedTask.queue(); -+ } else { -+ task.prioritisedTask.raisePriority(priority); -+ } -+ } -+ -+ /** -+ * Schedules a load to be executed asynchronously. This task will load all regionfile types, and then call -+ * {@code onComplete}. This is a bulk load operation, see {@link #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean)} -+ * for single load. -+ *

-+ * Impl notes: -+ *

    -+ *
  • -+ * The {@code onComplete} parameter may be completed during the execution of this function synchronously or it may -+ * be completed asynchronously on this file io thread. Interacting with the file IO thread in the completion of -+ * data is undefined behaviour, and can cause deadlock. -+ *
    • -+ *
-+ * -+ * @param world Chunk's world -+ * @param chunkX Chunk's x coordinate -+ * @param chunkZ Chunk's z coordinate -+ * @param onComplete Consumer to execute once this task has completed -+ * @param intendingToBlock Whether the caller is intending to block on completion. This only affects the cost -+ * of this call. -+ * -+ * @return The {@link Cancellable} for this chunk load. Cancelling it will not affect other loads for the same chunk data. -+ * -+ * @see #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean) -+ * @see #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean, Priority) -+ * @see #loadChunkData(ServerLevel, int, int, Consumer, boolean, RegionFileType...) -+ * @see #loadChunkData(ServerLevel, int, int, Consumer, boolean, Priority, RegionFileType...) -+ */ -+ public static Cancellable loadAllChunkData(final ServerLevel world, final int chunkX, final int chunkZ, -+ final Consumer onComplete, final boolean intendingToBlock) { -+ return RegionFileIOThread.loadAllChunkData(world, chunkX, chunkZ, onComplete, intendingToBlock, PrioritisedExecutor.Priority.NORMAL); -+ } -+ -+ /** -+ * Schedules a load to be executed asynchronously. This task will load all regionfile types, and then call -+ * {@code onComplete}. This is a bulk load operation, see {@link #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean, Priority)} -+ * for single load. -+ *

-+ * Impl notes: -+ *

    -+ *
  • -+ * The {@code onComplete} parameter may be completed during the execution of this function synchronously or it may -+ * be completed asynchronously on this file io thread. Interacting with the file IO thread in the completion of -+ * data is undefined behaviour, and can cause deadlock. -+ *
    • -+ *
-+ * -+ * @param world Chunk's world -+ * @param chunkX Chunk's x coordinate -+ * @param chunkZ Chunk's z coordinate -+ * @param onComplete Consumer to execute once this task has completed -+ * @param intendingToBlock Whether the caller is intending to block on completion. This only affects the cost -+ * of this call. -+ * @param priority The minimum priority to load the data at. -+ * -+ * @return The {@link Cancellable} for this chunk load. Cancelling it will not affect other loads for the same chunk data. -+ * -+ * @see #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean) -+ * @see #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean, Priority) -+ * @see #loadChunkData(ServerLevel, int, int, Consumer, boolean, RegionFileType...) -+ * @see #loadChunkData(ServerLevel, int, int, Consumer, boolean, Priority, RegionFileType...) -+ */ -+ public static Cancellable loadAllChunkData(final ServerLevel world, final int chunkX, final int chunkZ, -+ final Consumer onComplete, final boolean intendingToBlock, -+ final PrioritisedExecutor.Priority priority) { -+ return RegionFileIOThread.loadChunkData(world, chunkX, chunkZ, onComplete, intendingToBlock, priority, CACHED_REGIONFILE_TYPES); -+ } -+ -+ /** -+ * Schedules a load to be executed asynchronously. This task will load data for the specified regionfile type(s), and -+ * then call {@code onComplete}. This is a bulk load operation, see {@link #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean)} -+ * for single load. -+ *

-+ * Impl notes: -+ *

    -+ *
  • -+ * The {@code onComplete} parameter may be completed during the execution of this function synchronously or it may -+ * be completed asynchronously on this file io thread. Interacting with the file IO thread in the completion of -+ * data is undefined behaviour, and can cause deadlock. -+ *
    • -+ *
-+ * -+ * @param world Chunk's world -+ * @param chunkX Chunk's x coordinate -+ * @param chunkZ Chunk's z coordinate -+ * @param onComplete Consumer to execute once this task has completed -+ * @param intendingToBlock Whether the caller is intending to block on completion. This only affects the cost -+ * of this call. -+ * @param types The regionfile type(s) to load. -+ * -+ * @return The {@link Cancellable} for this chunk load. Cancelling it will not affect other loads for the same chunk data. -+ * -+ * @see #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean) -+ * @see #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean, Priority) -+ * @see #loadAllChunkData(ServerLevel, int, int, Consumer, boolean) -+ * @see #loadAllChunkData(ServerLevel, int, int, Consumer, boolean, Priority) -+ */ -+ public static Cancellable loadChunkData(final ServerLevel world, final int chunkX, final int chunkZ, -+ final Consumer onComplete, final boolean intendingToBlock, -+ final RegionFileType... types) { -+ return RegionFileIOThread.loadChunkData(world, chunkX, chunkZ, onComplete, intendingToBlock, PrioritisedExecutor.Priority.NORMAL, types); -+ } -+ -+ /** -+ * Schedules a load to be executed asynchronously. This task will load data for the specified regionfile type(s), and -+ * then call {@code onComplete}. This is a bulk load operation, see {@link #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean, Priority)} -+ * for single load. -+ *

-+ * Impl notes: -+ *

    -+ *
  • -+ * The {@code onComplete} parameter may be completed during the execution of this function synchronously or it may -+ * be completed asynchronously on this file io thread. Interacting with the file IO thread in the completion of -+ * data is undefined behaviour, and can cause deadlock. -+ *
    • -+ *
-+ * -+ * @param world Chunk's world -+ * @param chunkX Chunk's x coordinate -+ * @param chunkZ Chunk's z coordinate -+ * @param onComplete Consumer to execute once this task has completed -+ * @param intendingToBlock Whether the caller is intending to block on completion. This only affects the cost -+ * of this call. -+ * @param types The regionfile type(s) to load. -+ * @param priority The minimum priority to load the data at. -+ * -+ * @return The {@link Cancellable} for this chunk load. Cancelling it will not affect other loads for the same chunk data. -+ * -+ * @see #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean) -+ * @see #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean, Priority) -+ * @see #loadAllChunkData(ServerLevel, int, int, Consumer, boolean) -+ * @see #loadAllChunkData(ServerLevel, int, int, Consumer, boolean, Priority) -+ */ -+ public static Cancellable loadChunkData(final ServerLevel world, final int chunkX, final int chunkZ, -+ final Consumer onComplete, final boolean intendingToBlock, -+ final PrioritisedExecutor.Priority priority, final RegionFileType... types) { -+ if (types == null) { -+ throw new NullPointerException("Types cannot be null"); -+ } -+ if (types.length == 0) { -+ throw new IllegalArgumentException("Types cannot be empty"); -+ } -+ -+ final RegionFileData ret = new RegionFileData(); -+ -+ final Cancellable[] reads = new CancellableRead[types.length]; -+ final AtomicInteger completions = new AtomicInteger(); -+ final int expectedCompletions = types.length; -+ -+ for (int i = 0; i < expectedCompletions; ++i) { -+ final RegionFileType type = types[i]; -+ reads[i] = RegionFileIOThread.loadDataAsync(world, chunkX, chunkZ, type, -+ (final CompoundTag data, final Throwable throwable) -> { -+ if (throwable != null) { -+ ret.setThrowable(type, throwable); -+ } else { -+ ret.setData(type, data); -+ } -+ -+ if (completions.incrementAndGet() == expectedCompletions) { -+ onComplete.accept(ret); -+ } -+ }, intendingToBlock, priority); -+ } -+ -+ return new CancellableReads(reads); -+ } -+ -+ /** -+ * Schedules a load to be executed asynchronously. This task will load the specified regionfile type, and then call -+ * {@code onComplete}. -+ *

-+ * Impl notes: -+ *

    -+ *
  • -+ * The {@code onComplete} parameter may be completed during the execution of this function synchronously or it may -+ * be completed asynchronously on this file io thread. Interacting with the file IO thread in the completion of -+ * data is undefined behaviour, and can cause deadlock. -+ *
    • -+ *
-+ * -+ * @param world Chunk's world -+ * @param chunkX Chunk's x coordinate -+ * @param chunkZ Chunk's z coordinate -+ * @param onComplete Consumer to execute once this task has completed -+ * @param intendingToBlock Whether the caller is intending to block on completion. This only affects the cost -+ * of this call. -+ * -+ * @return The {@link Cancellable} for this chunk load. Cancelling it will not affect other loads for the same chunk data. -+ * -+ * @see #loadChunkData(ServerLevel, int, int, Consumer, boolean, RegionFileType...) -+ * @see #loadChunkData(ServerLevel, int, int, Consumer, boolean, Priority, RegionFileType...) -+ * @see #loadAllChunkData(ServerLevel, int, int, Consumer, boolean) -+ * @see #loadAllChunkData(ServerLevel, int, int, Consumer, boolean, Priority) -+ */ -+ public static Cancellable loadDataAsync(final ServerLevel world, final int chunkX, final int chunkZ, -+ final RegionFileType type, final BiConsumer onComplete, -+ final boolean intendingToBlock) { -+ return RegionFileIOThread.loadDataAsync(world, chunkX, chunkZ, type, onComplete, intendingToBlock, PrioritisedExecutor.Priority.NORMAL); -+ } -+ -+ /** -+ * Schedules a load to be executed asynchronously. This task will load the specified regionfile type, and then call -+ * {@code onComplete}. -+ *

-+ * Impl notes: -+ *

    -+ *
  • -+ * The {@code onComplete} parameter may be completed during the execution of this function synchronously or it may -+ * be completed asynchronously on this file io thread. Interacting with the file IO thread in the completion of -+ * data is undefined behaviour, and can cause deadlock. -+ *
    • -+ *
-+ * -+ * @param world Chunk's world -+ * @param chunkX Chunk's x coordinate -+ * @param chunkZ Chunk's z coordinate -+ * @param onComplete Consumer to execute once this task has completed -+ * @param intendingToBlock Whether the caller is intending to block on completion. This only affects the cost -+ * of this call. -+ * @param priority Minimum priority to load the data at. -+ * -+ * @return The {@link Cancellable} for this chunk load. Cancelling it will not affect other loads for the same chunk data. -+ * -+ * @see #loadChunkData(ServerLevel, int, int, Consumer, boolean, RegionFileType...) -+ * @see #loadChunkData(ServerLevel, int, int, Consumer, boolean, Priority, RegionFileType...) -+ * @see #loadAllChunkData(ServerLevel, int, int, Consumer, boolean) -+ * @see #loadAllChunkData(ServerLevel, int, int, Consumer, boolean, Priority) -+ */ -+ public static Cancellable loadDataAsync(final ServerLevel world, final int chunkX, final int chunkZ, -+ final RegionFileType type, final BiConsumer onComplete, -+ final boolean intendingToBlock, final PrioritisedExecutor.Priority priority) { -+ final RegionFileIOThread thread = RegionFileIOThread.selectThread(world, chunkX, chunkZ, type); -+ return thread.loadDataAsyncInternal(world, chunkX, chunkZ, type, onComplete, intendingToBlock, priority); -+ } -+ -+ Cancellable loadDataAsyncInternal(final ServerLevel world, final int chunkX, final int chunkZ, -+ final RegionFileType type, final BiConsumer onComplete, -+ final boolean intendingToBlock, final PrioritisedExecutor.Priority priority) { -+ final ChunkDataController taskController = this.getControllerFor(world, type); -+ -+ final ImmediateCallbackCompletion callbackInfo = new ImmediateCallbackCompletion(); -+ -+ final ChunkCoordinate key = new ChunkCoordinate(CoordinateUtils.getChunkKey(chunkX, chunkZ)); -+ final BiFunction compute = (final ChunkCoordinate keyInMap, final ChunkDataTask running) -> { -+ if (running == null) { -+ // not scheduled -+ -+ // set up task -+ final ChunkDataTask newTask = new ChunkDataTask( -+ world, chunkX, chunkZ, taskController, RegionFileIOThread.this, priority -+ ); -+ newTask.inProgressRead = new RegionFileIOThread.InProgressRead(); -+ newTask.inProgressRead.waiters.add(onComplete); -+ -+ callbackInfo.tasksNeedsScheduling = true; -+ return newTask; -+ } -+ -+ final CompoundTag pendingWrite = running.inProgressWrite; -+ -+ if (pendingWrite == ChunkDataTask.NOTHING_TO_WRITE) { -+ // need to add to waiters here, because the regionfile thread will use compute() to lock and check for cancellations -+ if (!running.inProgressRead.addToWaiters(onComplete)) { -+ callbackInfo.data = running.inProgressRead.value; -+ callbackInfo.throwable = running.inProgressRead.throwable; -+ callbackInfo.completeNow = true; -+ } -+ return running; -+ } -+ // using the result sync here - don't bump priority -+ -+ // at this stage we have to use the in progress write's data to avoid an order issue -+ callbackInfo.data = pendingWrite; -+ callbackInfo.throwable = null; -+ callbackInfo.completeNow = true; -+ return running; -+ }; -+ -+ final ChunkDataTask ret = taskController.tasks.compute(key, compute); -+ -+ // needs to be scheduled -+ if (callbackInfo.tasksNeedsScheduling) { -+ ret.prioritisedTask.queue(); -+ } else if (callbackInfo.completeNow) { -+ try { -+ onComplete.accept(callbackInfo.data, callbackInfo.throwable); -+ } catch (final ThreadDeath thr) { -+ throw thr; -+ } catch (final Throwable thr) { -+ LOGGER.error("Callback " + ConcurrentUtil.genericToString(onComplete) + " synchronously failed to handle chunk data for task " + ret.toString(), thr); -+ } -+ } else { -+ // we're waiting on a task we didn't schedule, so raise its priority to what we want -+ ret.prioritisedTask.raisePriority(priority); -+ } -+ -+ return new CancellableRead(onComplete, ret); -+ } -+ -+ /** -+ * Schedules a load task to be executed asynchronously, and blocks on that task. -+ * -+ * @param world Chunk's world -+ * @param chunkX Chunk's x coordinate -+ * @param chunkZ Chunk's z coordinate -+ * @param type Regionfile type -+ * @param priority Minimum priority to load the data at. -+ * -+ * @return The chunk data for the chunk. Note that a {@code null} result means the chunk or regionfile does not exist on disk. -+ * -+ * @throws IOException If the load fails for any reason -+ */ -+ public static CompoundTag loadData(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type, -+ final PrioritisedExecutor.Priority priority) throws IOException { -+ final CompletableFuture ret = new CompletableFuture<>(); -+ -+ RegionFileIOThread.loadDataAsync(world, chunkX, chunkZ, type, (final CompoundTag compound, final Throwable thr) -> { -+ if (thr != null) { -+ ret.completeExceptionally(thr); -+ } else { -+ ret.complete(compound); -+ } -+ }, true, priority); -+ -+ try { -+ return ret.join(); -+ } catch (final CompletionException ex) { -+ throw new IOException(ex); -+ } -+ } -+ -+ private static final class ImmediateCallbackCompletion { -+ -+ public CompoundTag data; -+ public Throwable throwable; -+ public boolean completeNow; -+ public boolean tasksNeedsScheduling; -+ -+ } -+ -+ static final class CancellableRead implements Cancellable { -+ -+ private BiConsumer callback; -+ private RegionFileIOThread.ChunkDataTask task; -+ -+ CancellableRead(final BiConsumer callback, final RegionFileIOThread.ChunkDataTask task) { -+ this.callback = callback; -+ this.task = task; -+ } -+ -+ @Override -+ public boolean cancel() { -+ final BiConsumer callback = this.callback; -+ final RegionFileIOThread.ChunkDataTask task = this.task; -+ -+ if (callback == null || task == null) { -+ return false; -+ } -+ -+ this.callback = null; -+ this.task = null; -+ -+ final RegionFileIOThread.InProgressRead read = task.inProgressRead; -+ -+ // read can be null if no read was scheduled (i.e no regionfile existed or chunk in regionfile didn't) -+ return (read != null && read.waiters.remove(callback)); -+ } -+ } -+ -+ static final class CancellableReads implements Cancellable { -+ -+ private Cancellable[] reads; -+ -+ protected static final VarHandle READS_HANDLE = ConcurrentUtil.getVarHandle(CancellableReads.class, "reads", Cancellable[].class); -+ -+ CancellableReads(final Cancellable[] reads) { -+ this.reads = reads; -+ } -+ -+ @Override -+ public boolean cancel() { -+ final Cancellable[] reads = (Cancellable[])READS_HANDLE.getAndSet((CancellableReads)this, (Cancellable[])null); -+ -+ if (reads == null) { -+ return false; -+ } -+ -+ boolean ret = false; -+ -+ for (final Cancellable read : reads) { -+ ret |= read.cancel(); -+ } -+ -+ return ret; -+ } -+ } -+ -+ static final class InProgressRead { -+ -+ private static final Logger LOGGER = LogUtils.getClassLogger(); -+ -+ CompoundTag value; -+ Throwable throwable; -+ final MultiThreadedQueue> waiters = new MultiThreadedQueue<>(); -+ -+ // rets false if already completed (callback not invoked), true if callback was added -+ boolean addToWaiters(final BiConsumer callback) { -+ return this.waiters.add(callback); -+ } -+ -+ void complete(final RegionFileIOThread.ChunkDataTask task, final CompoundTag value, final Throwable throwable) { -+ this.value = value; -+ this.throwable = throwable; -+ -+ BiConsumer consumer; -+ while ((consumer = this.waiters.pollOrBlockAdds()) != null) { -+ try { -+ consumer.accept(value, throwable); -+ } catch (final ThreadDeath thr) { -+ throw thr; -+ } catch (final Throwable thr) { -+ LOGGER.error("Callback " + ConcurrentUtil.genericToString(consumer) + " failed to handle chunk data for task " + task.toString(), thr); -+ } -+ } -+ } -+ } -+ -+ /** -+ * Class exists to replace {@link Long} usages as keys inside non-fastutil hashtables. The hash for some Long {@code x} -+ * is defined as {@code (x >>> 32) ^ x}. Chunk keys as long values are defined as {@code ((chunkX & 0xFFFFFFFFL) | (chunkZ << 32))}, -+ * which means the hashcode as a Long value will be {@code chunkX ^ chunkZ}. Given that most chunks are created within a radius arounds players, -+ * this will lead to many hash collisions. So, this class uses a better hashing algorithm so that usage of -+ * non-fastutil collections is not degraded. -+ */ -+ public static final class ChunkCoordinate implements Comparable { -+ -+ public final long key; -+ -+ public ChunkCoordinate(final long key) { -+ this.key = key; -+ } -+ -+ @Override -+ public int hashCode() { -+ return (int)HashCommon.mix(this.key); -+ } -+ -+ @Override -+ public boolean equals(final Object obj) { -+ if (this == obj) { -+ return true; -+ } -+ -+ if (!(obj instanceof ChunkCoordinate)) { -+ return false; -+ } -+ -+ final ChunkCoordinate other = (ChunkCoordinate)obj; -+ -+ return this.key == other.key; -+ } -+ -+ // This class is intended for HashMap/ConcurrentHashMap usage, which do treeify bin nodes if the chain -+ // is too large. So we should implement compareTo to help. -+ @Override -+ public int compareTo(final RegionFileIOThread.ChunkCoordinate other) { -+ return Long.compare(this.key, other.key); -+ } -+ -+ @Override -+ public String toString() { -+ return new ChunkPos(this.key).toString(); -+ } -+ } -+ -+ public static abstract class ChunkDataController { -+ -+ // ConcurrentHashMap synchronizes per chain, so reduce the chance of task's hashes colliding. -+ protected final ConcurrentHashMap tasks = new ConcurrentHashMap<>(8192, 0.10f); -+ -+ public final RegionFileType type; -+ -+ public ChunkDataController(final RegionFileType type) { -+ this.type = type; -+ } -+ -+ public abstract RegionFileStorage getCache(); -+ -+ public abstract void writeData(final int chunkX, final int chunkZ, final CompoundTag compound) throws IOException; -+ -+ public abstract CompoundTag readData(final int chunkX, final int chunkZ) throws IOException; -+ -+ public boolean hasTasks() { -+ return !this.tasks.isEmpty(); -+ } -+ -+ public boolean doesRegionFileNotExist(final int chunkX, final int chunkZ) { -+ return this.getCache().doesRegionFileNotExistNoIO(new ChunkPos(chunkX, chunkZ)); -+ } -+ -+ public T computeForRegionFile(final int chunkX, final int chunkZ, final boolean existingOnly, final Function function) { -+ final RegionFileStorage cache = this.getCache(); -+ final RegionFile regionFile; -+ synchronized (cache) { -+ try { -+ regionFile = cache.getRegionFile(new ChunkPos(chunkX, chunkZ), existingOnly, true); -+ } catch (final IOException ex) { -+ throw new RuntimeException(ex); -+ } -+ } -+ -+ try { -+ return function.apply(regionFile); -+ } finally { -+ if (regionFile != null) { -+ regionFile.fileLock.unlock(); -+ } -+ } -+ } -+ -+ public T computeForRegionFileIfLoaded(final int chunkX, final int chunkZ, final Function function) { -+ final RegionFileStorage cache = this.getCache(); -+ final RegionFile regionFile; -+ -+ synchronized (cache) { -+ regionFile = cache.getRegionFileIfLoaded(new ChunkPos(chunkX, chunkZ)); -+ if (regionFile != null) { -+ regionFile.fileLock.lock(); -+ } -+ } -+ -+ try { -+ return function.apply(regionFile); -+ } finally { -+ if (regionFile != null) { -+ regionFile.fileLock.unlock(); -+ } -+ } -+ } -+ } -+ -+ static final class ChunkDataTask implements Runnable { -+ -+ protected static final CompoundTag NOTHING_TO_WRITE = new CompoundTag(); -+ -+ private static final Logger LOGGER = LogUtils.getClassLogger(); -+ -+ RegionFileIOThread.InProgressRead inProgressRead; -+ volatile CompoundTag inProgressWrite = NOTHING_TO_WRITE; // only needs to be acquire/release -+ -+ boolean failedWrite; -+ -+ final ServerLevel world; -+ final int chunkX; -+ final int chunkZ; -+ final RegionFileIOThread.ChunkDataController taskController; -+ -+ final PrioritisedExecutor.PrioritisedTask prioritisedTask; -+ -+ /* -+ * IO thread will perform reads before writes for a given chunk x and z -+ * -+ * How reads/writes are scheduled: -+ * -+ * If read is scheduled while scheduling write, take no special action and just schedule write -+ * If read is scheduled while scheduling read and no write is scheduled, chain the read task -+ * -+ * -+ * If write is scheduled while scheduling read, use the pending write data and ret immediately (so no read is scheduled) -+ * If write is scheduled while scheduling write (ignore read in progress), overwrite the write in progress data -+ * -+ * This allows the reads and writes to act as if they occur synchronously to the thread scheduling them, however -+ * it fails to properly propagate write failures thanks to writes overwriting each other -+ */ -+ -+ public ChunkDataTask(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileIOThread.ChunkDataController taskController, -+ final PrioritisedExecutor executor, final PrioritisedExecutor.Priority priority) { -+ this.world = world; -+ this.chunkX = chunkX; -+ this.chunkZ = chunkZ; -+ this.taskController = taskController; -+ this.prioritisedTask = executor.createTask(this, priority); -+ } -+ -+ @Override -+ public String toString() { -+ return "Task for world: '" + this.world.getWorld().getName() + "' at (" + this.chunkX + "," + this.chunkZ + -+ ") type: " + this.taskController.type.name() + ", hash: " + this.hashCode(); -+ } -+ -+ @Override -+ public void run() { -+ final RegionFileIOThread.InProgressRead read = this.inProgressRead; -+ final ChunkCoordinate chunkKey = new ChunkCoordinate(CoordinateUtils.getChunkKey(this.chunkX, this.chunkZ)); -+ -+ if (read != null) { -+ final boolean[] canRead = new boolean[] { true }; -+ -+ if (read.waiters.isEmpty()) { -+ // cancelled read? go to task controller to confirm -+ final ChunkDataTask inMap = this.taskController.tasks.compute(chunkKey, (final ChunkCoordinate keyInMap, final ChunkDataTask valueInMap) -> { -+ if (valueInMap == null) { -+ throw new IllegalStateException("Write completed concurrently, expected this task: " + ChunkDataTask.this.toString() + ", report this!"); -+ } -+ if (valueInMap != ChunkDataTask.this) { -+ throw new IllegalStateException("Chunk task mismatch, expected this task: " + ChunkDataTask.this.toString() + ", got: " + valueInMap.toString() + ", report this!"); -+ } -+ -+ if (!read.waiters.isEmpty()) { // as per usual IntelliJ is unable to figure out that there are concurrent accesses. -+ return valueInMap; -+ } else { -+ canRead[0] = false; -+ } -+ -+ return valueInMap.inProgressWrite == NOTHING_TO_WRITE ? null : valueInMap; -+ }); -+ -+ if (inMap == null) { -+ // read is cancelled - and no write pending, so we're done -+ return; -+ } -+ // if there is a write in progress, we don't actually have to worry about waiters gaining new entries - -+ // the readers will just use the in progress write, so the value in canRead is good to use without -+ // further synchronisation. -+ } -+ -+ if (canRead[0]) { -+ CompoundTag compound = null; -+ Throwable throwable = null; -+ -+ try { -+ compound = this.taskController.readData(this.chunkX, this.chunkZ); -+ } catch (final ThreadDeath thr) { -+ throw thr; -+ } catch (final Throwable thr) { -+ throwable = thr; -+ LOGGER.error("Failed to read chunk data for task: " + this.toString(), thr); -+ } -+ read.complete(this, compound, throwable); -+ } -+ } -+ -+ CompoundTag write = this.inProgressWrite; -+ -+ if (write == NOTHING_TO_WRITE) { -+ final ChunkDataTask inMap = this.taskController.tasks.compute(chunkKey, (final ChunkCoordinate keyInMap, final ChunkDataTask valueInMap) -> { -+ if (valueInMap == null) { -+ throw new IllegalStateException("Write completed concurrently, expected this task: " + ChunkDataTask.this.toString() + ", report this!"); -+ } -+ if (valueInMap != ChunkDataTask.this) { -+ throw new IllegalStateException("Chunk task mismatch, expected this task: " + ChunkDataTask.this.toString() + ", got: " + valueInMap.toString() + ", report this!"); -+ } -+ return valueInMap.inProgressWrite == NOTHING_TO_WRITE ? null : valueInMap; -+ }); -+ -+ if (inMap == null) { -+ return; // set the task value to null, indicating we're done -+ } // else: inProgressWrite changed, so now we have something to write -+ } -+ -+ for (;;) { -+ write = this.inProgressWrite; -+ final CompoundTag dataWritten = write; -+ -+ boolean failedWrite = false; -+ -+ try { -+ this.taskController.writeData(this.chunkX, this.chunkZ, write); -+ } catch (final ThreadDeath thr) { -+ throw thr; -+ } catch (final Throwable thr) { -+ if (thr instanceof RegionFileStorage.RegionFileSizeException) { -+ final int maxSize = RegionFile.MAX_CHUNK_SIZE / (1024 * 1024); -+ LOGGER.error("Chunk at (" + this.chunkX + "," + this.chunkZ + ") in '" + this.world.getWorld().getName() + "' exceeds max size of " + maxSize + "MiB, it has been deleted from disk."); -+ } else { -+ failedWrite = thr instanceof IOException; -+ LOGGER.error("Failed to write chunk data for task: " + this.toString(), thr); -+ } -+ } -+ -+ final boolean finalFailWrite = failedWrite; -+ final boolean[] done = new boolean[] { false }; -+ -+ this.taskController.tasks.compute(chunkKey, (final ChunkCoordinate keyInMap, final ChunkDataTask valueInMap) -> { -+ if (valueInMap == null) { -+ throw new IllegalStateException("Write completed concurrently, expected this task: " + ChunkDataTask.this.toString() + ", report this!"); -+ } -+ if (valueInMap != ChunkDataTask.this) { -+ throw new IllegalStateException("Chunk task mismatch, expected this task: " + ChunkDataTask.this.toString() + ", got: " + valueInMap.toString() + ", report this!"); -+ } -+ if (valueInMap.inProgressWrite == dataWritten) { -+ valueInMap.failedWrite = finalFailWrite; -+ done[0] = true; -+ // keep the data in map if we failed the write so we can try to prevent data loss -+ return finalFailWrite ? valueInMap : null; -+ } -+ // different data than expected, means we need to retry write -+ return valueInMap; -+ }); -+ -+ if (done[0]) { -+ return; -+ } -+ -+ // fetch & write new data -+ continue; -+ } -+ } -+ } -+} -diff --git a/src/main/java/io/papermc/paper/chunk/system/light/LightQueue.java b/src/main/java/io/papermc/paper/chunk/system/light/LightQueue.java -new file mode 100644 -index 0000000000000000000000000000000000000000..69e9944358951bd69ff5e8b3482da1a5e4476209 ---- /dev/null -+++ b/src/main/java/io/papermc/paper/chunk/system/light/LightQueue.java -@@ -0,0 +1,283 @@ -+package io.papermc.paper.chunk.system.light; -+ -+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; -+import ca.spottedleaf.starlight.common.light.BlockStarLightEngine; -+import ca.spottedleaf.starlight.common.light.SkyStarLightEngine; -+import ca.spottedleaf.starlight.common.light.StarLightInterface; -+import io.papermc.paper.util.CoordinateUtils; -+import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap; -+import it.unimi.dsi.fastutil.shorts.ShortCollection; -+import it.unimi.dsi.fastutil.shorts.ShortOpenHashSet; -+import net.minecraft.core.BlockPos; -+import net.minecraft.core.SectionPos; -+import net.minecraft.server.level.ServerLevel; -+import net.minecraft.world.level.ChunkPos; -+import net.minecraft.world.level.chunk.status.ChunkStatus; -+import java.util.ArrayList; -+import java.util.HashSet; -+import java.util.List; -+import java.util.Set; -+import java.util.concurrent.CompletableFuture; -+import java.util.function.BooleanSupplier; -+ -+public final class LightQueue { -+ -+ protected final Long2ObjectOpenHashMap chunkTasks = new Long2ObjectOpenHashMap<>(); -+ protected final StarLightInterface manager; -+ protected final ServerLevel world; -+ -+ public LightQueue(final StarLightInterface manager) { -+ this.manager = manager; -+ this.world = ((ServerLevel)manager.getWorld()); -+ } -+ -+ public void lowerPriority(final int chunkX, final int chunkZ, final PrioritisedExecutor.Priority priority) { -+ final ChunkTasks task; -+ synchronized (this) { -+ task = this.chunkTasks.get(CoordinateUtils.getChunkKey(chunkX, chunkZ)); -+ } -+ if (task != null) { -+ task.lowerPriority(priority); -+ } -+ } -+ -+ public void setPriority(final int chunkX, final int chunkZ, final PrioritisedExecutor.Priority priority) { -+ final ChunkTasks task; -+ synchronized (this) { -+ task = this.chunkTasks.get(CoordinateUtils.getChunkKey(chunkX, chunkZ)); -+ } -+ if (task != null) { -+ task.setPriority(priority); -+ } -+ } -+ -+ public void raisePriority(final int chunkX, final int chunkZ, final PrioritisedExecutor.Priority priority) { -+ final ChunkTasks task; -+ synchronized (this) { -+ task = this.chunkTasks.get(CoordinateUtils.getChunkKey(chunkX, chunkZ)); -+ } -+ if (task != null) { -+ task.raisePriority(priority); -+ } -+ } -+ -+ public PrioritisedExecutor.Priority getPriority(final int chunkX, final int chunkZ) { -+ final ChunkTasks task; -+ synchronized (this) { -+ task = this.chunkTasks.get(CoordinateUtils.getChunkKey(chunkX, chunkZ)); -+ } -+ if (task != null) { -+ return task.getPriority(); -+ } -+ -+ return PrioritisedExecutor.Priority.COMPLETING; -+ } -+ -+ public boolean isEmpty() { -+ synchronized (this) { -+ return this.chunkTasks.isEmpty(); -+ } -+ } -+ -+ public ChunkTasks queueBlockChange(final BlockPos pos) { -+ final ChunkTasks tasks; -+ synchronized (this) { -+ tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), (final long keyInMap) -> { -+ return new ChunkTasks(keyInMap, LightQueue.this.manager, LightQueue.this); -+ }); -+ tasks.changedPositions.add(pos.immutable()); -+ } -+ -+ tasks.schedule(); -+ -+ return tasks; -+ } -+ -+ public ChunkTasks queueSectionChange(final SectionPos pos, final boolean newEmptyValue) { -+ final ChunkTasks tasks; -+ synchronized (this) { -+ tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), (final long keyInMap) -> { -+ return new ChunkTasks(keyInMap, LightQueue.this.manager, LightQueue.this); -+ }); -+ -+ if (tasks.changedSectionSet == null) { -+ tasks.changedSectionSet = new Boolean[this.manager.maxSection - this.manager.minSection + 1]; -+ } -+ tasks.changedSectionSet[pos.getY() - this.manager.minSection] = Boolean.valueOf(newEmptyValue); -+ } -+ -+ tasks.schedule(); -+ -+ return tasks; -+ } -+ -+ public ChunkTasks queueChunkLightTask(final ChunkPos pos, final BooleanSupplier lightTask, final PrioritisedExecutor.Priority priority) { -+ final ChunkTasks tasks; -+ synchronized (this) { -+ tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), (final long keyInMap) -> { -+ return new ChunkTasks(keyInMap, LightQueue.this.manager, LightQueue.this, priority); -+ }); -+ if (tasks.lightTasks == null) { -+ tasks.lightTasks = new ArrayList<>(); -+ } -+ tasks.lightTasks.add(lightTask); -+ } -+ -+ tasks.schedule(); -+ -+ return tasks; -+ } -+ -+ public ChunkTasks queueChunkSkylightEdgeCheck(final SectionPos pos, final ShortCollection sections) { -+ final ChunkTasks tasks; -+ synchronized (this) { -+ tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), (final long keyInMap) -> { -+ return new ChunkTasks(keyInMap, LightQueue.this.manager, LightQueue.this); -+ }); -+ -+ ShortOpenHashSet queuedEdges = tasks.queuedEdgeChecksSky; -+ if (queuedEdges == null) { -+ queuedEdges = tasks.queuedEdgeChecksSky = new ShortOpenHashSet(); -+ } -+ queuedEdges.addAll(sections); -+ } -+ -+ tasks.schedule(); -+ -+ return tasks; -+ } -+ -+ public ChunkTasks queueChunkBlocklightEdgeCheck(final SectionPos pos, final ShortCollection sections) { -+ final ChunkTasks tasks; -+ -+ synchronized (this) { -+ tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), (final long keyInMap) -> { -+ return new ChunkTasks(keyInMap, LightQueue.this.manager, LightQueue.this); -+ }); -+ -+ ShortOpenHashSet queuedEdges = tasks.queuedEdgeChecksBlock; -+ if (queuedEdges == null) { -+ queuedEdges = tasks.queuedEdgeChecksBlock = new ShortOpenHashSet(); -+ } -+ queuedEdges.addAll(sections); -+ } -+ -+ tasks.schedule(); -+ -+ return tasks; -+ } -+ -+ public void removeChunk(final ChunkPos pos) { -+ final ChunkTasks tasks; -+ synchronized (this) { -+ tasks = this.chunkTasks.remove(CoordinateUtils.getChunkKey(pos)); -+ } -+ if (tasks != null && tasks.cancel()) { -+ tasks.onComplete.complete(null); -+ } -+ } -+ -+ public static final class ChunkTasks implements Runnable { -+ -+ public final CompletableFuture onComplete = new CompletableFuture<>(); -+ public boolean isTicketAdded; -+ public final long chunkCoordinate; -+ -+ private final StarLightInterface lightEngine; -+ private final LightQueue queue; -+ private final PrioritisedExecutor.PrioritisedTask task; -+ private final Set changedPositions = new HashSet<>(); -+ private Boolean[] changedSectionSet; -+ private ShortOpenHashSet queuedEdgeChecksSky; -+ private ShortOpenHashSet queuedEdgeChecksBlock; -+ private List lightTasks; -+ -+ public ChunkTasks(final long chunkCoordinate, final StarLightInterface lightEngine, final LightQueue queue) { -+ this(chunkCoordinate, lightEngine, queue, PrioritisedExecutor.Priority.NORMAL); -+ } -+ -+ public ChunkTasks(final long chunkCoordinate, final StarLightInterface lightEngine, final LightQueue queue, -+ final PrioritisedExecutor.Priority priority) { -+ this.chunkCoordinate = chunkCoordinate; -+ this.lightEngine = lightEngine; -+ this.queue = queue; -+ this.task = queue.world.chunkTaskScheduler.radiusAwareScheduler.createTask( -+ CoordinateUtils.getChunkX(chunkCoordinate), CoordinateUtils.getChunkZ(chunkCoordinate), -+ ChunkStatus.LIGHT.writeRadius, this, priority -+ ); -+ } -+ -+ public void schedule() { -+ this.task.queue(); -+ } -+ -+ public boolean cancel() { -+ return this.task.cancel(); -+ } -+ -+ public PrioritisedExecutor.Priority getPriority() { -+ return this.task.getPriority(); -+ } -+ -+ public void lowerPriority(final PrioritisedExecutor.Priority priority) { -+ this.task.lowerPriority(priority); -+ } -+ -+ public void setPriority(final PrioritisedExecutor.Priority priority) { -+ this.task.setPriority(priority); -+ } -+ -+ public void raisePriority(final PrioritisedExecutor.Priority priority) { -+ this.task.raisePriority(priority); -+ } -+ -+ @Override -+ public void run() { -+ synchronized (this.queue) { -+ this.queue.chunkTasks.remove(this.chunkCoordinate); -+ } -+ -+ boolean litChunk = false; -+ if (this.lightTasks != null) { -+ for (final BooleanSupplier run : this.lightTasks) { -+ if (run.getAsBoolean()) { -+ litChunk = true; -+ break; -+ } -+ } -+ } -+ -+ final SkyStarLightEngine skyEngine = this.lightEngine.getSkyLightEngine(); -+ final BlockStarLightEngine blockEngine = this.lightEngine.getBlockLightEngine(); -+ try { -+ final long coordinate = this.chunkCoordinate; -+ final int chunkX = CoordinateUtils.getChunkX(coordinate); -+ final int chunkZ = CoordinateUtils.getChunkZ(coordinate); -+ -+ final Set positions = this.changedPositions; -+ final Boolean[] sectionChanges = this.changedSectionSet; -+ -+ if (!litChunk) { -+ if (skyEngine != null && (!positions.isEmpty() || sectionChanges != null)) { -+ skyEngine.blocksChangedInChunk(this.lightEngine.getLightAccess(), chunkX, chunkZ, positions, sectionChanges); -+ } -+ if (blockEngine != null && (!positions.isEmpty() || sectionChanges != null)) { -+ blockEngine.blocksChangedInChunk(this.lightEngine.getLightAccess(), chunkX, chunkZ, positions, sectionChanges); -+ } -+ -+ if (skyEngine != null && this.queuedEdgeChecksSky != null) { -+ skyEngine.checkChunkEdges(this.lightEngine.getLightAccess(), chunkX, chunkZ, this.queuedEdgeChecksSky); -+ } -+ if (blockEngine != null && this.queuedEdgeChecksBlock != null) { -+ blockEngine.checkChunkEdges(this.lightEngine.getLightAccess(), chunkX, chunkZ, this.queuedEdgeChecksBlock); -+ } -+ } -+ -+ this.onComplete.complete(null); -+ } finally { -+ this.lightEngine.releaseSkyLightEngine(skyEngine); -+ this.lightEngine.releaseBlockLightEngine(blockEngine); -+ } -+ } -+ } -+} -diff --git a/src/main/java/io/papermc/paper/chunk/system/poi/PoiChunk.java b/src/main/java/io/papermc/paper/chunk/system/poi/PoiChunk.java -new file mode 100644 -index 0000000000000000000000000000000000000000..d72041aa814ff179e6e29a45dcd359a91d426d47 ---- /dev/null -+++ b/src/main/java/io/papermc/paper/chunk/system/poi/PoiChunk.java -@@ -0,0 +1,213 @@ -+package io.papermc.paper.chunk.system.poi; -+ -+import com.mojang.logging.LogUtils; -+import com.mojang.serialization.Codec; -+import com.mojang.serialization.DataResult; -+import io.papermc.paper.util.CoordinateUtils; -+import io.papermc.paper.util.TickThread; -+import io.papermc.paper.util.WorldUtil; -+import net.minecraft.SharedConstants; -+import net.minecraft.nbt.CompoundTag; -+import net.minecraft.nbt.NbtOps; -+import net.minecraft.nbt.Tag; -+import net.minecraft.resources.RegistryOps; -+import net.minecraft.server.level.ServerLevel; -+import net.minecraft.world.entity.ai.village.poi.PoiManager; -+import net.minecraft.world.entity.ai.village.poi.PoiSection; -+import org.slf4j.Logger; -+ -+import java.util.Optional; -+ -+public final class PoiChunk { -+ -+ private static final Logger LOGGER = LogUtils.getClassLogger(); -+ -+ public final ServerLevel world; -+ public final int chunkX; -+ public final int chunkZ; -+ public final int minSection; -+ public final int maxSection; -+ -+ protected final PoiSection[] sections; -+ -+ private boolean isDirty; -+ private boolean loaded; -+ -+ public PoiChunk(final ServerLevel world, final int chunkX, final int chunkZ, final int minSection, final int maxSection) { -+ this(world, chunkX, chunkZ, minSection, maxSection, new PoiSection[maxSection - minSection + 1]); -+ } -+ -+ public PoiChunk(final ServerLevel world, final int chunkX, final int chunkZ, final int minSection, final int maxSection, final PoiSection[] sections) { -+ this.world = world; -+ this.chunkX = chunkX; -+ this.chunkZ = chunkZ; -+ this.minSection = minSection; -+ this.maxSection = maxSection; -+ this.sections = sections; -+ if (this.sections.length != (maxSection - minSection + 1)) { -+ throw new IllegalStateException("Incorrect length used, expected " + (maxSection - minSection + 1) + ", got " + this.sections.length); -+ } -+ } -+ -+ public void load() { -+ TickThread.ensureTickThread(this.world, this.chunkX, this.chunkZ, "Loading in poi chunk off-main"); -+ if (this.loaded) { -+ return; -+ } -+ this.loaded = true; -+ this.world.chunkSource.getPoiManager().loadInPoiChunk(this); -+ } -+ -+ public boolean isLoaded() { -+ return this.loaded; -+ } -+ -+ public boolean isEmpty() { -+ for (final PoiSection section : this.sections) { -+ if (section != null && !section.isEmpty()) { -+ return false; -+ } -+ } -+ -+ return true; -+ } -+ -+ public PoiSection getOrCreateSection(final int chunkY) { -+ if (chunkY >= this.minSection && chunkY <= this.maxSection) { -+ final int idx = chunkY - this.minSection; -+ final PoiSection ret = this.sections[idx]; -+ if (ret != null) { -+ return ret; -+ } -+ -+ final PoiManager poiManager = this.world.getPoiManager(); -+ final long key = CoordinateUtils.getChunkSectionKey(this.chunkX, chunkY, this.chunkZ); -+ -+ return this.sections[idx] = new PoiSection(() -> { -+ poiManager.setDirty(key); -+ }); -+ } -+ throw new IllegalArgumentException("chunkY is out of bounds, chunkY: " + chunkY + " outside [" + this.minSection + "," + this.maxSection + "]"); -+ } -+ -+ public PoiSection getSection(final int chunkY) { -+ if (chunkY >= this.minSection && chunkY <= this.maxSection) { -+ return this.sections[chunkY - this.minSection]; -+ } -+ return null; -+ } -+ -+ public Optional getSectionForVanilla(final int chunkY) { -+ if (chunkY >= this.minSection && chunkY <= this.maxSection) { -+ final PoiSection ret = this.sections[chunkY - this.minSection]; -+ return ret == null ? Optional.empty() : ret.noAllocateOptional; -+ } -+ return Optional.empty(); -+ } -+ -+ public boolean isDirty() { -+ return this.isDirty; -+ } -+ -+ public void setDirty(final boolean dirty) { -+ this.isDirty = dirty; -+ } -+ -+ // returns null if empty -+ public CompoundTag save() { -+ final RegistryOps registryOps = RegistryOps.create(NbtOps.INSTANCE, world.getPoiManager().registryAccess); -+ -+ final CompoundTag ret = new CompoundTag(); -+ final CompoundTag sections = new CompoundTag(); -+ ret.put("Sections", sections); -+ -+ ret.putInt("DataVersion", SharedConstants.getCurrentVersion().getDataVersion().getVersion()); -+ -+ final ServerLevel world = this.world; -+ final PoiManager poiManager = world.getPoiManager(); -+ final int chunkX = this.chunkX; -+ final int chunkZ = this.chunkZ; -+ -+ for (int sectionY = this.minSection; sectionY <= this.maxSection; ++sectionY) { -+ final PoiSection chunk = this.sections[sectionY - this.minSection]; -+ if (chunk == null || chunk.isEmpty()) { -+ continue; -+ } -+ -+ final long key = CoordinateUtils.getChunkSectionKey(chunkX, sectionY, chunkZ); -+ // codecs are honestly such a fucking disaster. What the fuck is this trash? -+ final Codec codec = PoiSection.codec(() -> { -+ poiManager.setDirty(key); -+ }); -+ -+ final DataResult serializedResult = codec.encodeStart(registryOps, chunk); -+ final int finalSectionY = sectionY; -+ final Tag serialized = serializedResult.resultOrPartial((final String description) -> { -+ LOGGER.error("Failed to serialize poi chunk for world: " + world.getWorld().getName() + ", chunk: (" + chunkX + "," + finalSectionY + "," + chunkZ + "); description: " + description); -+ }).orElse(null); -+ if (serialized == null) { -+ // failed, should be logged from the resultOrPartial -+ continue; -+ } -+ -+ sections.put(Integer.toString(sectionY), serialized); -+ } -+ -+ return sections.isEmpty() ? null : ret; -+ } -+ -+ public static PoiChunk empty(final ServerLevel world, final int chunkX, final int chunkZ) { -+ final PoiChunk ret = new PoiChunk(world, chunkX, chunkZ, WorldUtil.getMinSection(world), WorldUtil.getMaxSection(world)); -+ ret.loaded = true; -+ return ret; -+ } -+ -+ public static PoiChunk parse(final ServerLevel world, final int chunkX, final int chunkZ, final CompoundTag data) { -+ final PoiChunk ret = empty(world, chunkX, chunkZ); -+ -+ final RegistryOps registryOps = RegistryOps.create(NbtOps.INSTANCE, world.getPoiManager().registryAccess); -+ -+ final CompoundTag sections = data.getCompound("Sections"); -+ -+ if (sections.isEmpty()) { -+ // nothing to parse -+ return ret; -+ } -+ -+ final PoiManager poiManager = world.getPoiManager(); -+ -+ boolean readAnything = false; -+ -+ for (int sectionY = ret.minSection; sectionY <= ret.maxSection; ++sectionY) { -+ final String key = Integer.toString(sectionY); -+ if (!sections.contains(key)) { -+ continue; -+ } -+ -+ final long coordinateKey = CoordinateUtils.getChunkSectionKey(chunkX, sectionY, chunkZ); -+ // codecs are honestly such a fucking disaster. What the fuck is this trash? -+ final Codec codec = PoiSection.codec(() -> { -+ poiManager.setDirty(coordinateKey); -+ }); -+ -+ final CompoundTag section = sections.getCompound(key); -+ final DataResult deserializeResult = codec.parse(registryOps, section); -+ final int finalSectionY = sectionY; -+ final PoiSection deserialized = deserializeResult.resultOrPartial((final String description) -> { -+ LOGGER.error("Failed to deserialize poi chunk for world: " + world.getWorld().getName() + ", chunk: (" + chunkX + "," + finalSectionY + "," + chunkZ + "); description: " + description); -+ }).orElse(null); -+ -+ if (deserialized == null || deserialized.isEmpty()) { -+ // completely empty, no point in storing this -+ continue; -+ } -+ -+ readAnything = true; -+ ret.sections[sectionY - ret.minSection] = deserialized; -+ } -+ -+ ret.loaded = !readAnything; // Set loaded to false if we read anything to ensure proper callbacks to PoiManager are made on #load -+ -+ return ret; -+ } -+} -diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkFullTask.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkFullTask.java -new file mode 100644 -index 0000000000000000000000000000000000000000..c307b084f59f7bb94dc02f25bbcd3e01e01d2306 ---- /dev/null -+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkFullTask.java -@@ -0,0 +1,131 @@ -+package io.papermc.paper.chunk.system.scheduling; -+ -+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; -+import ca.spottedleaf.concurrentutil.util.ConcurrentUtil; -+import com.mojang.logging.LogUtils; -+import io.papermc.paper.chunk.system.poi.PoiChunk; -+import net.minecraft.server.level.ChunkMap; -+import net.minecraft.server.level.ServerLevel; -+import net.minecraft.world.level.chunk.ChunkAccess; -+import net.minecraft.world.level.chunk.status.ChunkStatus; -+import net.minecraft.world.level.chunk.ImposterProtoChunk; -+import net.minecraft.world.level.chunk.LevelChunk; -+import net.minecraft.world.level.chunk.ProtoChunk; -+import org.slf4j.Logger; -+import java.lang.invoke.VarHandle; -+ -+public final class ChunkFullTask extends ChunkProgressionTask implements Runnable { -+ -+ private static final Logger LOGGER = LogUtils.getClassLogger(); -+ -+ protected final NewChunkHolder chunkHolder; -+ protected final ChunkAccess fromChunk; -+ protected final PrioritisedExecutor.PrioritisedTask convertToFullTask; -+ -+ public ChunkFullTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX, final int chunkZ, -+ final NewChunkHolder chunkHolder, final ChunkAccess fromChunk, final PrioritisedExecutor.Priority priority) { -+ super(scheduler, world, chunkX, chunkZ); -+ this.chunkHolder = chunkHolder; -+ this.fromChunk = fromChunk; -+ this.convertToFullTask = scheduler.createChunkTask(chunkX, chunkZ, this, priority); -+ } -+ -+ @Override -+ public ChunkStatus getTargetStatus() { -+ return ChunkStatus.FULL; -+ } -+ -+ @Override -+ public void run() { -+ // See Vanilla protoChunkToFullChunk for what this function should be doing -+ final LevelChunk chunk; -+ try { -+ // moved from the load from nbt stage into here -+ final PoiChunk poiChunk = this.chunkHolder.getPoiChunk(); -+ if (poiChunk == null) { -+ LOGGER.error("Expected poi chunk to be loaded with chunk for task " + this.toString()); -+ } else { -+ poiChunk.load(); -+ this.world.getPoiManager().checkConsistency(this.fromChunk); -+ } -+ -+ if (this.fromChunk instanceof ImposterProtoChunk wrappedFull) { -+ chunk = wrappedFull.getWrapped(); -+ } else { -+ final ServerLevel world = this.world; -+ final ProtoChunk protoChunk = (ProtoChunk)this.fromChunk; -+ chunk = new LevelChunk(this.world, protoChunk, (final LevelChunk unused) -> { -+ ChunkMap.postLoadProtoChunk(world, protoChunk.getEntities(), protoChunk.getPos()); // Paper - rewrite chunk system -+ }); -+ } -+ -+ chunk.setChunkHolder(this.scheduler.chunkHolderManager.getChunkHolder(this.chunkX, this.chunkZ)); // replaces setFullStatus -+ chunk.runPostLoad(); -+ // Unlike Vanilla, we load the entity chunk here, as we load the NBT in empty status (unlike Vanilla) -+ // This brings entity addition back in line with older versions of the game -+ // Since we load the NBT in the empty status, this will never block for I/O -+ this.world.chunkTaskScheduler.chunkHolderManager.getOrCreateEntityChunk(this.chunkX, this.chunkZ, false); -+ -+ // we don't need the entitiesInLevel trash, this system doesn't double run callbacks -+ chunk.setLoaded(true); -+ chunk.registerAllBlockEntitiesAfterLevelLoad(); -+ chunk.registerTickContainerInLevel(this.world); -+ } catch (final Throwable throwable) { -+ this.complete(null, throwable); -+ return; -+ } -+ this.complete(chunk, null); -+ } -+ -+ protected volatile boolean scheduled; -+ protected static final VarHandle SCHEDULED_HANDLE = ConcurrentUtil.getVarHandle(ChunkFullTask.class, "scheduled", boolean.class); -+ -+ @Override -+ public boolean isScheduled() { -+ return this.scheduled; -+ } -+ -+ @Override -+ public void schedule() { -+ if ((boolean)SCHEDULED_HANDLE.getAndSet((ChunkFullTask)this, true)) { -+ throw new IllegalStateException("Cannot double call schedule()"); -+ } -+ this.convertToFullTask.queue(); -+ } -+ -+ @Override -+ public void cancel() { -+ if (this.convertToFullTask.cancel()) { -+ this.complete(null, null); -+ } -+ } -+ -+ @Override -+ public PrioritisedExecutor.Priority getPriority() { -+ return this.convertToFullTask.getPriority(); -+ } -+ -+ @Override -+ public void lowerPriority(final PrioritisedExecutor.Priority priority) { -+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { -+ throw new IllegalArgumentException("Invalid priority " + priority); -+ } -+ this.convertToFullTask.lowerPriority(priority); -+ } -+ -+ @Override -+ public void setPriority(final PrioritisedExecutor.Priority priority) { -+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { -+ throw new IllegalArgumentException("Invalid priority " + priority); -+ } -+ this.convertToFullTask.setPriority(priority); -+ } -+ -+ @Override -+ public void raisePriority(final PrioritisedExecutor.Priority priority) { -+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { -+ throw new IllegalArgumentException("Invalid priority " + priority); -+ } -+ this.convertToFullTask.raisePriority(priority); -+ } -+} -diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkHolderManager.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkHolderManager.java -new file mode 100644 -index 0000000000000000000000000000000000000000..5b446e6ac151f99f64f0c442d0b40b5e251bc4c4 ---- /dev/null -+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkHolderManager.java -@@ -0,0 +1,1500 @@ -+package io.papermc.paper.chunk.system.scheduling; -+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; -+import ca.spottedleaf.concurrentutil.lock.ReentrantAreaLock; -+import ca.spottedleaf.concurrentutil.map.SWMRLong2ObjectHashTable; -+import com.google.common.collect.ImmutableList; -+import com.google.gson.JsonArray; -+import com.google.gson.JsonObject; -+import com.mojang.logging.LogUtils; -+import io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader; -+import io.papermc.paper.chunk.system.io.RegionFileIOThread; -+import io.papermc.paper.chunk.system.poi.PoiChunk; -+import io.papermc.paper.threadedregions.TickRegions; -+import io.papermc.paper.util.CoordinateUtils; -+import io.papermc.paper.util.TickThread; -+import io.papermc.paper.world.ChunkEntitySlices; -+import it.unimi.dsi.fastutil.longs.Long2ByteLinkedOpenHashMap; -+import it.unimi.dsi.fastutil.longs.Long2ByteMap; -+import it.unimi.dsi.fastutil.longs.Long2IntLinkedOpenHashMap; -+import it.unimi.dsi.fastutil.longs.Long2IntMap; -+import it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap; -+import it.unimi.dsi.fastutil.longs.Long2ObjectMap; -+import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap; -+import it.unimi.dsi.fastutil.longs.LongArrayList; -+import it.unimi.dsi.fastutil.longs.LongIterator; -+import it.unimi.dsi.fastutil.objects.ObjectRBTreeSet; -+import net.minecraft.nbt.CompoundTag; -+import io.papermc.paper.chunk.system.ChunkSystem; -+import net.minecraft.server.MinecraftServer; -+import net.minecraft.server.level.ChunkHolder; -+import net.minecraft.server.level.ChunkLevel; -+import net.minecraft.server.level.FullChunkStatus; -+import net.minecraft.server.level.ServerLevel; -+import net.minecraft.server.level.Ticket; -+import net.minecraft.server.level.TicketType; -+import net.minecraft.util.SortedArraySet; -+import net.minecraft.util.Unit; -+import net.minecraft.world.level.ChunkPos; -+import org.bukkit.plugin.Plugin; -+import org.slf4j.Logger; -+import java.io.IOException; -+import java.text.DecimalFormat; -+import java.util.ArrayDeque; -+import java.util.ArrayList; -+import java.util.Collection; -+import java.util.Collections; -+import java.util.Iterator; -+import java.util.List; -+import java.util.concurrent.ConcurrentHashMap; -+import java.util.concurrent.TimeUnit; -+import java.util.concurrent.atomic.AtomicBoolean; -+import java.util.concurrent.atomic.AtomicLong; -+import java.util.concurrent.atomic.AtomicReference; -+import java.util.concurrent.locks.LockSupport; -+import java.util.function.Predicate; -+ -+public final class ChunkHolderManager { -+ -+ private static final Logger LOGGER = LogUtils.getClassLogger(); -+ -+ public static final int FULL_LOADED_TICKET_LEVEL = 33; -+ public static final int BLOCK_TICKING_TICKET_LEVEL = 32; -+ public static final int ENTITY_TICKING_TICKET_LEVEL = 31; -+ public static final int MAX_TICKET_LEVEL = ChunkLevel.MAX_LEVEL; // inclusive -+ -+ private static final long NO_TIMEOUT_MARKER = Long.MIN_VALUE; -+ private static final long PROBE_MARKER = Long.MIN_VALUE + 1; -+ public final ReentrantAreaLock ticketLockArea; -+ -+ private final ConcurrentHashMap>> tickets = new java.util.concurrent.ConcurrentHashMap<>(); -+ private final ConcurrentHashMap sectionToChunkToExpireCount = new java.util.concurrent.ConcurrentHashMap<>(); -+ final ChunkQueue unloadQueue; -+ -+ public boolean processTicketUpdates(final int posX, final int posZ) { -+ final int ticketShift = ThreadedTicketLevelPropagator.SECTION_SHIFT; -+ final int ticketMask = (1 << ticketShift) - 1; -+ final List scheduledTasks = new ArrayList<>(); -+ final List changedFullStatus = new ArrayList<>(); -+ final boolean ret; -+ final ReentrantAreaLock.Node ticketLock = this.ticketLockArea.lock( -+ ((posX >> ticketShift) - 1) << ticketShift, -+ ((posZ >> ticketShift) - 1) << ticketShift, -+ (((posX >> ticketShift) + 1) << ticketShift) | ticketMask, -+ (((posZ >> ticketShift) + 1) << ticketShift) | ticketMask -+ ); -+ try { -+ ret = this.processTicketUpdatesNoLock(posX >> ticketShift, posZ >> ticketShift, scheduledTasks, changedFullStatus); -+ } finally { -+ this.ticketLockArea.unlock(ticketLock); -+ } -+ -+ this.addChangedStatuses(changedFullStatus); -+ -+ for (int i = 0, len = scheduledTasks.size(); i < len; ++i) { -+ scheduledTasks.get(i).schedule(); -+ } -+ -+ return ret; -+ } -+ -+ private boolean processTicketUpdatesNoLock(final int sectionX, final int sectionZ, final List scheduledTasks, -+ final List changedFullStatus) { -+ return this.ticketLevelPropagator.performUpdate( -+ sectionX, sectionZ, this.taskScheduler.schedulingLockArea, scheduledTasks, changedFullStatus -+ ); -+ } -+ -+ private final SWMRLong2ObjectHashTable chunkHolders = new SWMRLong2ObjectHashTable<>(16384, 0.25f); -+ // what a disaster of a name -+ // this is a map of removal tick to a map of chunks and the number of tickets a chunk has that are to expire that tick -+ private final Long2ObjectOpenHashMap removeTickToChunkExpireTicketCount = new Long2ObjectOpenHashMap<>(); -+ private final ServerLevel world; -+ private final ChunkTaskScheduler taskScheduler; -+ private long currentTick; -+ -+ private final ArrayDeque pendingFullLoadUpdate = new ArrayDeque<>(); -+ private final ObjectRBTreeSet autoSaveQueue = new ObjectRBTreeSet<>((final NewChunkHolder c1, final NewChunkHolder c2) -> { -+ if (c1 == c2) { -+ return 0; -+ } -+ -+ final int saveTickCompare = Long.compare(c1.lastAutoSave, c2.lastAutoSave); -+ -+ if (saveTickCompare != 0) { -+ return saveTickCompare; -+ } -+ -+ final long coord1 = CoordinateUtils.getChunkKey(c1.chunkX, c1.chunkZ); -+ final long coord2 = CoordinateUtils.getChunkKey(c2.chunkX, c2.chunkZ); -+ -+ if (coord1 == coord2) { -+ throw new IllegalStateException("Duplicate chunkholder in auto save queue"); -+ } -+ -+ return Long.compare(coord1, coord2); -+ }); -+ -+ public ChunkHolderManager(final ServerLevel world, final ChunkTaskScheduler taskScheduler) { -+ this.world = world; -+ this.taskScheduler = taskScheduler; -+ this.ticketLockArea = new ReentrantAreaLock(taskScheduler.getChunkSystemLockShift()); -+ this.unloadQueue = new ChunkQueue(world.getRegionChunkShift()); -+ } -+ -+ private final AtomicLong statusUpgradeId = new AtomicLong(); -+ -+ long getNextStatusUpgradeId() { -+ return this.statusUpgradeId.incrementAndGet(); -+ } -+ -+ public List getOldChunkHolders() { -+ final List holders = this.getChunkHolders(); -+ final List ret = new ArrayList<>(holders.size()); -+ for (final NewChunkHolder holder : holders) { -+ ret.add(holder.vanillaChunkHolder); -+ } -+ return ret; -+ } -+ -+ public List getChunkHolders() { -+ final List ret = new ArrayList<>(this.chunkHolders.size()); -+ this.chunkHolders.forEachValue(ret::add); -+ return ret; -+ } -+ -+ public int size() { -+ return this.chunkHolders.size(); -+ } -+ -+ public void close(final boolean save, final boolean halt) { -+ TickThread.ensureTickThread("Closing world off-main"); -+ if (halt) { -+ LOGGER.info("Waiting 60s for chunk system to halt for world '" + this.world.getWorld().getName() + "'"); -+ if (!this.taskScheduler.halt(true, TimeUnit.SECONDS.toNanos(60L))) { -+ LOGGER.warn("Failed to halt world generation/loading tasks for world '" + this.world.getWorld().getName() + "'"); -+ } else { -+ LOGGER.info("Halted chunk system for world '" + this.world.getWorld().getName() + "'"); -+ } -+ } -+ -+ if (save) { -+ this.saveAllChunks(true, true, true); -+ } -+ -+ if (this.world.chunkDataControllerNew.hasTasks() || this.world.entityDataControllerNew.hasTasks() || this.world.poiDataControllerNew.hasTasks()) { -+ RegionFileIOThread.flush(); -+ } -+ -+ // kill regionfile cache -+ try { -+ this.world.chunkDataControllerNew.getCache().close(); -+ } catch (final IOException ex) { -+ LOGGER.error("Failed to close chunk regionfile cache for world '" + this.world.getWorld().getName() + "'", ex); -+ } -+ try { -+ this.world.entityDataControllerNew.getCache().close(); -+ } catch (final IOException ex) { -+ LOGGER.error("Failed to close entity regionfile cache for world '" + this.world.getWorld().getName() + "'", ex); -+ } -+ try { -+ this.world.poiDataControllerNew.getCache().close(); -+ } catch (final IOException ex) { -+ LOGGER.error("Failed to close poi regionfile cache for world '" + this.world.getWorld().getName() + "'", ex); -+ } -+ } -+ -+ void ensureInAutosave(final NewChunkHolder holder) { -+ if (!this.autoSaveQueue.contains(holder)) { -+ holder.lastAutoSave = MinecraftServer.currentTick; -+ this.autoSaveQueue.add(holder); -+ } -+ } -+ -+ public void autoSave() { -+ final List reschedule = new ArrayList<>(); -+ final long currentTick = MinecraftServer.currentTickLong; -+ final long maxSaveTime = currentTick - this.world.paperConfig().chunks.autoSaveInterval.value(); -+ for (int autoSaved = 0; autoSaved < this.world.paperConfig().chunks.maxAutoSaveChunksPerTick && !this.autoSaveQueue.isEmpty();) { -+ final NewChunkHolder holder = this.autoSaveQueue.first(); -+ -+ if (holder.lastAutoSave > maxSaveTime) { -+ break; -+ } -+ -+ this.autoSaveQueue.remove(holder); -+ -+ holder.lastAutoSave = currentTick; -+ if (holder.save(false, false) != null) { -+ ++autoSaved; -+ } -+ -+ if (holder.getChunkStatus().isOrAfter(FullChunkStatus.FULL)) { -+ reschedule.add(holder); -+ } -+ } -+ -+ for (final NewChunkHolder holder : reschedule) { -+ if (holder.getChunkStatus().isOrAfter(FullChunkStatus.FULL)) { -+ this.autoSaveQueue.add(holder); -+ } -+ } -+ } -+ -+ public void saveAllChunks(final boolean flush, final boolean shutdown, final boolean logProgress) { -+ final List holders = this.getChunkHolders(); -+ -+ if (logProgress) { -+ LOGGER.info("Saving all chunkholders for world '" + this.world.getWorld().getName() + "'"); -+ } -+ -+ final DecimalFormat format = new DecimalFormat("#0.00"); -+ -+ int saved = 0; -+ -+ long start = System.nanoTime(); -+ long lastLog = start; -+ boolean needsFlush = false; -+ final int flushInterval = 50; -+ -+ int savedChunk = 0; -+ int savedEntity = 0; -+ int savedPoi = 0; -+ -+ for (int i = 0, len = holders.size(); i < len; ++i) { -+ final NewChunkHolder holder = holders.get(i); -+ try { -+ final NewChunkHolder.SaveStat saveStat = holder.save(shutdown, false); -+ if (saveStat != null) { -+ ++saved; -+ needsFlush = flush; -+ if (saveStat.savedChunk()) { -+ ++savedChunk; -+ } -+ if (saveStat.savedEntityChunk()) { -+ ++savedEntity; -+ } -+ if (saveStat.savedPoiChunk()) { -+ ++savedPoi; -+ } -+ } -+ } catch (final ThreadDeath thr) { -+ throw thr; -+ } catch (final Throwable thr) { -+ LOGGER.error("Failed to save chunk (" + holder.chunkX + "," + holder.chunkZ + ") in world '" + this.world.getWorld().getName() + "'", thr); -+ } -+ if (needsFlush && (saved % flushInterval) == 0) { -+ needsFlush = false; -+ RegionFileIOThread.partialFlush(flushInterval / 2); -+ } -+ if (logProgress) { -+ final long currTime = System.nanoTime(); -+ if ((currTime - lastLog) > TimeUnit.SECONDS.toNanos(10L)) { -+ lastLog = currTime; -+ LOGGER.info("Saved " + saved + " chunks (" + format.format((double)(i+1)/(double)len * 100.0) + "%) in world '" + this.world.getWorld().getName() + "'"); -+ } -+ } -+ } -+ if (flush) { -+ RegionFileIOThread.flush(); -+ if (this.world.paperConfig().chunks.flushRegionsOnSave) { -+ try { -+ this.world.chunkSource.chunkMap.regionFileCache.flush(); -+ } catch (IOException ex) { -+ LOGGER.error("Exception when flushing regions in world {}", this.world.getWorld().getName(), ex); -+ } -+ } -+ } -+ if (logProgress) { -+ LOGGER.info("Saved " + savedChunk + " block chunks, " + savedEntity + " entity chunks, " + savedPoi + " poi chunks in world '" + this.world.getWorld().getName() + "' in " + format.format(1.0E-9 * (System.nanoTime() - start)) + "s"); -+ } -+ } -+ -+ protected final ThreadedTicketLevelPropagator ticketLevelPropagator = new ThreadedTicketLevelPropagator() { -+ @Override -+ protected void processLevelUpdates(final Long2ByteLinkedOpenHashMap updates) { -+ // first the necessary chunkholders must be created, so just update the ticket levels -+ for (final Iterator iterator = updates.long2ByteEntrySet().fastIterator(); iterator.hasNext();) { -+ final Long2ByteMap.Entry entry = iterator.next(); -+ final long key = entry.getLongKey(); -+ final int newLevel = convertBetweenTicketLevels((int)entry.getByteValue()); -+ -+ NewChunkHolder current = ChunkHolderManager.this.chunkHolders.get(key); -+ if (current == null && newLevel > MAX_TICKET_LEVEL) { -+ // not loaded and it shouldn't be loaded! -+ iterator.remove(); -+ continue; -+ } -+ -+ final int currentLevel = current == null ? MAX_TICKET_LEVEL + 1 : current.getCurrentTicketLevel(); -+ if (currentLevel == newLevel) { -+ // nothing to do -+ iterator.remove(); -+ continue; -+ } -+ -+ if (current == null) { -+ // must create -+ current = ChunkHolderManager.this.createChunkHolder(key); -+ synchronized (ChunkHolderManager.this.chunkHolders) { -+ ChunkHolderManager.this.chunkHolders.put(key, current); -+ } -+ current.updateTicketLevel(newLevel); -+ } else { -+ current.updateTicketLevel(newLevel); -+ } -+ } -+ } -+ -+ @Override -+ protected void processSchedulingUpdates(final Long2ByteLinkedOpenHashMap updates, final List scheduledTasks, -+ final List changedFullStatus) { -+ final List prev = CURRENT_TICKET_UPDATE_SCHEDULING.get(); -+ CURRENT_TICKET_UPDATE_SCHEDULING.set(scheduledTasks); -+ try { -+ for (final LongIterator iterator = updates.keySet().iterator(); iterator.hasNext();) { -+ final long key = iterator.nextLong(); -+ final NewChunkHolder current = ChunkHolderManager.this.chunkHolders.get(key); -+ -+ if (current == null) { -+ throw new IllegalStateException("Expected chunk holder to be created"); -+ } -+ -+ current.processTicketLevelUpdate(scheduledTasks, changedFullStatus); -+ } -+ } finally { -+ CURRENT_TICKET_UPDATE_SCHEDULING.set(prev); -+ } -+ } -+ }; -+ // function for converting between ticket levels and propagator levels and vice versa -+ // the problem is the ticket level propagator will propagate from a set source down to zero, whereas mojang expects -+ // levels to propagate from a set value up to a maximum value. so we need to convert the levels we put into the propagator -+ // and the levels we get out of the propagator -+ -+ public static int convertBetweenTicketLevels(final int level) { -+ return ChunkLevel.MAX_LEVEL - level + 1; -+ } -+ -+ public String getTicketDebugString(final long coordinate) { -+ final ReentrantAreaLock.Node ticketLock = this.ticketLockArea.lock(CoordinateUtils.getChunkX(coordinate), CoordinateUtils.getChunkZ(coordinate)); -+ try { -+ final SortedArraySet> tickets = this.tickets.get(new RegionFileIOThread.ChunkCoordinate(coordinate)); -+ -+ return tickets != null ? tickets.first().toString() : "no_ticket"; -+ } finally { -+ if (ticketLock != null) { -+ this.ticketLockArea.unlock(ticketLock); -+ } -+ } -+ } -+ -+ public Long2ObjectOpenHashMap>> getTicketsCopy() { -+ final Long2ObjectOpenHashMap>> ret = new Long2ObjectOpenHashMap<>(); -+ final Long2ObjectOpenHashMap> sections = new Long2ObjectOpenHashMap(); -+ final int sectionShift = this.taskScheduler.getChunkSystemLockShift(); -+ for (final RegionFileIOThread.ChunkCoordinate coord : this.tickets.keySet()) { -+ sections.computeIfAbsent( -+ CoordinateUtils.getChunkKey( -+ CoordinateUtils.getChunkX(coord.key) >> sectionShift, -+ CoordinateUtils.getChunkZ(coord.key) >> sectionShift -+ ), -+ (final long keyInMap) -> { -+ return new ArrayList<>(); -+ } -+ ).add(coord); -+ } -+ -+ for (final Iterator>> iterator = sections.long2ObjectEntrySet().fastIterator(); -+ iterator.hasNext();) { -+ final Long2ObjectMap.Entry> entry = iterator.next(); -+ final long sectionKey = entry.getLongKey(); -+ final List coordinates = entry.getValue(); -+ -+ final ReentrantAreaLock.Node ticketLock = this.ticketLockArea.lock( -+ CoordinateUtils.getChunkX(sectionKey) << sectionShift, -+ CoordinateUtils.getChunkZ(sectionKey) << sectionShift -+ ); -+ try { -+ for (final RegionFileIOThread.ChunkCoordinate coord : coordinates) { -+ final SortedArraySet> tickets = this.tickets.get(coord); -+ if (tickets == null) { -+ // removed before we acquired lock -+ continue; -+ } -+ ret.put(coord.key, new SortedArraySet<>(tickets)); -+ } -+ } finally { -+ this.ticketLockArea.unlock(ticketLock); -+ } -+ } -+ -+ return ret; -+ } -+ -+ public Collection getPluginChunkTickets(int x, int z) { -+ ImmutableList.Builder ret; -+ final ReentrantAreaLock.Node ticketLock = this.ticketLockArea.lock(x, z); -+ try { -+ final long coordinate = CoordinateUtils.getChunkKey(x, z); -+ final SortedArraySet> tickets = this.tickets.get(new RegionFileIOThread.ChunkCoordinate(coordinate)); -+ -+ if (tickets == null) { -+ return Collections.emptyList(); -+ } -+ -+ ret = ImmutableList.builder(); -+ for (Ticket ticket : tickets) { -+ if (ticket.getType() == TicketType.PLUGIN_TICKET) { -+ ret.add((Plugin)ticket.key); -+ } -+ } -+ } finally { -+ this.ticketLockArea.unlock(ticketLock); -+ } -+ -+ return ret.build(); -+ } -+ -+ protected final void updateTicketLevel(final long coordinate, final int ticketLevel) { -+ if (ticketLevel > ChunkLevel.MAX_LEVEL) { -+ this.ticketLevelPropagator.removeSource(CoordinateUtils.getChunkX(coordinate), CoordinateUtils.getChunkZ(coordinate)); -+ } else { -+ this.ticketLevelPropagator.setSource(CoordinateUtils.getChunkX(coordinate), CoordinateUtils.getChunkZ(coordinate), convertBetweenTicketLevels(ticketLevel)); -+ } -+ } -+ -+ private static int getTicketLevelAt(SortedArraySet> tickets) { -+ return !tickets.isEmpty() ? tickets.first().getTicketLevel() : MAX_TICKET_LEVEL + 1; -+ } -+ -+ public boolean addTicketAtLevel(final TicketType type, final ChunkPos chunkPos, final int level, -+ final T identifier) { -+ return this.addTicketAtLevel(type, CoordinateUtils.getChunkKey(chunkPos), level, identifier); -+ } -+ -+ public boolean addTicketAtLevel(final TicketType type, final int chunkX, final int chunkZ, final int level, -+ final T identifier) { -+ return this.addTicketAtLevel(type, CoordinateUtils.getChunkKey(chunkX, chunkZ), level, identifier); -+ } -+ -+ private void addExpireCount(final int chunkX, final int chunkZ) { -+ final long chunkKey = CoordinateUtils.getChunkKey(chunkX, chunkZ); -+ -+ final int sectionShift = this.world.getRegionChunkShift(); -+ final RegionFileIOThread.ChunkCoordinate sectionKey = new RegionFileIOThread.ChunkCoordinate(CoordinateUtils.getChunkKey( -+ chunkX >> sectionShift, -+ chunkZ >> sectionShift -+ )); -+ -+ this.sectionToChunkToExpireCount.computeIfAbsent(sectionKey, (final RegionFileIOThread.ChunkCoordinate keyInMap) -> { -+ return new Long2IntOpenHashMap(); -+ }).addTo(chunkKey, 1); -+ } -+ -+ private void removeExpireCount(final int chunkX, final int chunkZ) { -+ final long chunkKey = CoordinateUtils.getChunkKey(chunkX, chunkZ); -+ -+ final int sectionShift = this.world.getRegionChunkShift(); -+ final RegionFileIOThread.ChunkCoordinate sectionKey = new RegionFileIOThread.ChunkCoordinate(CoordinateUtils.getChunkKey( -+ chunkX >> sectionShift, -+ chunkZ >> sectionShift -+ )); -+ -+ final Long2IntOpenHashMap removeCounts = this.sectionToChunkToExpireCount.get(sectionKey); -+ final int prevCount = removeCounts.addTo(chunkKey, -1); -+ -+ if (prevCount == 1) { -+ removeCounts.remove(chunkKey); -+ if (removeCounts.isEmpty()) { -+ this.sectionToChunkToExpireCount.remove(sectionKey); -+ } -+ } -+ } -+ -+ // supposed to return true if the ticket was added and did not replace another -+ // but, we always return false if the ticket cannot be added -+ public boolean addTicketAtLevel(final TicketType type, final long chunk, final int level, final T identifier) { -+ return this.addTicketAtLevel(type, chunk, level, identifier, true); -+ } -+ -+ boolean addTicketAtLevel(final TicketType type, final long chunk, final int level, final T identifier, final boolean lock) { -+ final long removeDelay = type.timeout <= 0 ? NO_TIMEOUT_MARKER : type.timeout; -+ if (level > MAX_TICKET_LEVEL) { -+ return false; -+ } -+ -+ final int chunkX = CoordinateUtils.getChunkX(chunk); -+ final int chunkZ = CoordinateUtils.getChunkZ(chunk); -+ final RegionFileIOThread.ChunkCoordinate chunkCoord = new RegionFileIOThread.ChunkCoordinate(chunk); -+ final Ticket ticket = new Ticket<>(type, level, identifier, removeDelay); -+ -+ final ReentrantAreaLock.Node ticketLock = lock ? this.ticketLockArea.lock(chunkX, chunkZ) : null; -+ try { -+ final SortedArraySet> ticketsAtChunk = this.tickets.computeIfAbsent(chunkCoord, (final RegionFileIOThread.ChunkCoordinate keyInMap) -> { -+ return SortedArraySet.create(4); -+ }); -+ -+ final int levelBefore = getTicketLevelAt(ticketsAtChunk); -+ final Ticket current = (Ticket)ticketsAtChunk.replace(ticket); -+ final int levelAfter = getTicketLevelAt(ticketsAtChunk); -+ -+ if (current != ticket) { -+ final long oldRemoveDelay = current.removeDelay; -+ if (removeDelay != oldRemoveDelay) { -+ if (oldRemoveDelay != NO_TIMEOUT_MARKER && removeDelay == NO_TIMEOUT_MARKER) { -+ this.removeExpireCount(chunkX, chunkZ); -+ } else if (oldRemoveDelay == NO_TIMEOUT_MARKER) { -+ // since old != new, we have that NO_TIMEOUT_MARKER != new -+ this.addExpireCount(chunkX, chunkZ); -+ } -+ } -+ } else { -+ if (removeDelay != NO_TIMEOUT_MARKER) { -+ this.addExpireCount(chunkX, chunkZ); -+ } -+ } -+ -+ if (levelBefore != levelAfter) { -+ this.updateTicketLevel(chunk, levelAfter); -+ } -+ -+ return current == ticket; -+ } finally { -+ if (ticketLock != null) { -+ this.ticketLockArea.unlock(ticketLock); -+ } -+ } -+ } -+ -+ public boolean removeTicketAtLevel(final TicketType type, final ChunkPos chunkPos, final int level, final T identifier) { -+ return this.removeTicketAtLevel(type, CoordinateUtils.getChunkKey(chunkPos), level, identifier); -+ } -+ -+ public boolean removeTicketAtLevel(final TicketType type, final int chunkX, final int chunkZ, final int level, final T identifier) { -+ return this.removeTicketAtLevel(type, CoordinateUtils.getChunkKey(chunkX, chunkZ), level, identifier); -+ } -+ -+ public boolean removeTicketAtLevel(final TicketType type, final long chunk, final int level, final T identifier) { -+ return this.removeTicketAtLevel(type, chunk, level, identifier, true); -+ } -+ -+ boolean removeTicketAtLevel(final TicketType type, final long chunk, final int level, final T identifier, final boolean lock) { -+ if (level > MAX_TICKET_LEVEL) { -+ return false; -+ } -+ -+ final int chunkX = CoordinateUtils.getChunkX(chunk); -+ final int chunkZ = CoordinateUtils.getChunkZ(chunk); -+ final RegionFileIOThread.ChunkCoordinate chunkCoord = new RegionFileIOThread.ChunkCoordinate(chunk); -+ final Ticket probe = new Ticket<>(type, level, identifier, PROBE_MARKER); -+ -+ final ReentrantAreaLock.Node ticketLock = lock ? this.ticketLockArea.lock(chunkX, chunkZ) : null; -+ try { -+ final SortedArraySet> ticketsAtChunk = this.tickets.get(chunkCoord); -+ if (ticketsAtChunk == null) { -+ return false; -+ } -+ -+ final int oldLevel = getTicketLevelAt(ticketsAtChunk); -+ final Ticket ticket = (Ticket)ticketsAtChunk.removeAndGet(probe); -+ -+ if (ticket == null) { -+ return false; -+ } -+ -+ final int newLevel = getTicketLevelAt(ticketsAtChunk); -+ // we should not change the ticket levels while the target region may be ticking -+ if (oldLevel != newLevel) { -+ // Delay unload chunk patch originally by Aikar, updated to 1.20 by jpenilla -+ // these days, the patch is mostly useful to keep chunks ticking when players teleport -+ // so that their pets can teleport with them as well. -+ final long delayTimeout = this.world.paperConfig().chunks.delayChunkUnloadsBy.ticks(); -+ final TicketType toAdd; -+ final long timeout; -+ if (type == RegionizedPlayerChunkLoader.REGION_PLAYER_TICKET && delayTimeout > 0) { -+ toAdd = TicketType.DELAY_UNLOAD; -+ timeout = delayTimeout; -+ } else { -+ toAdd = TicketType.UNKNOWN; -+ // always expect UNKNOWN to be > 1, but just in case -+ timeout = Math.max(1, toAdd.timeout); -+ } -+ final Ticket unknownTicket = new Ticket<>(toAdd, level, new ChunkPos(chunk), timeout); -+ if (ticketsAtChunk.add(unknownTicket)) { -+ this.addExpireCount(chunkX, chunkZ); -+ } else { -+ throw new IllegalStateException("Should have been able to add " + unknownTicket + " to " + ticketsAtChunk); -+ } -+ } -+ -+ final long removeDelay = ticket.removeDelay; -+ if (removeDelay != NO_TIMEOUT_MARKER) { -+ this.removeExpireCount(chunkX, chunkZ); -+ } -+ -+ return true; -+ } finally { -+ if (ticketLock != null) { -+ this.ticketLockArea.unlock(ticketLock); -+ } -+ } -+ } -+ -+ // atomic with respect to all add/remove/addandremove ticket calls for the given chunk -+ public void addAndRemoveTickets(final long chunk, final TicketType addType, final int addLevel, final T addIdentifier, -+ final TicketType removeType, final int removeLevel, final V removeIdentifier) { -+ final ReentrantAreaLock.Node ticketLock = this.ticketLockArea.lock(CoordinateUtils.getChunkX(chunk), CoordinateUtils.getChunkZ(chunk)); -+ try { -+ this.addTicketAtLevel(addType, chunk, addLevel, addIdentifier, false); -+ this.removeTicketAtLevel(removeType, chunk, removeLevel, removeIdentifier, false); -+ } finally { -+ this.ticketLockArea.unlock(ticketLock); -+ } -+ } -+ -+ // atomic with respect to all add/remove/addandremove ticket calls for the given chunk -+ public boolean addIfRemovedTicket(final long chunk, final TicketType addType, final int addLevel, final T addIdentifier, -+ final TicketType removeType, final int removeLevel, final V removeIdentifier) { -+ final ReentrantAreaLock.Node ticketLock = this.ticketLockArea.lock(CoordinateUtils.getChunkX(chunk), CoordinateUtils.getChunkZ(chunk)); -+ try { -+ if (this.removeTicketAtLevel(removeType, chunk, removeLevel, removeIdentifier, false)) { -+ this.addTicketAtLevel(addType, chunk, addLevel, addIdentifier, false); -+ return true; -+ } -+ return false; -+ } finally { -+ this.ticketLockArea.unlock(ticketLock); -+ } -+ } -+ -+ public void removeAllTicketsFor(final TicketType ticketType, final int ticketLevel, final T ticketIdentifier) { -+ if (ticketLevel > MAX_TICKET_LEVEL) { -+ return; -+ } -+ -+ final Long2ObjectOpenHashMap> sections = new Long2ObjectOpenHashMap(); -+ final int sectionShift = this.taskScheduler.getChunkSystemLockShift(); -+ for (final RegionFileIOThread.ChunkCoordinate coord : this.tickets.keySet()) { -+ sections.computeIfAbsent( -+ CoordinateUtils.getChunkKey( -+ CoordinateUtils.getChunkX(coord.key) >> sectionShift, -+ CoordinateUtils.getChunkZ(coord.key) >> sectionShift -+ ), -+ (final long keyInMap) -> { -+ return new ArrayList<>(); -+ } -+ ).add(coord); -+ } -+ -+ for (final Iterator>> iterator = sections.long2ObjectEntrySet().fastIterator(); -+ iterator.hasNext();) { -+ final Long2ObjectMap.Entry> entry = iterator.next(); -+ final long sectionKey = entry.getLongKey(); -+ final List coordinates = entry.getValue(); -+ -+ final ReentrantAreaLock.Node ticketLock = this.ticketLockArea.lock( -+ CoordinateUtils.getChunkX(sectionKey) << sectionShift, -+ CoordinateUtils.getChunkZ(sectionKey) << sectionShift -+ ); -+ try { -+ for (final RegionFileIOThread.ChunkCoordinate coord : coordinates) { -+ this.removeTicketAtLevel(ticketType, coord.key, ticketLevel, ticketIdentifier, false); -+ } -+ } finally { -+ this.ticketLockArea.unlock(ticketLock); -+ } -+ } -+ } -+ -+ public void tick() { -+ final int sectionShift = this.world.getRegionChunkShift(); -+ -+ final Predicate> expireNow = (final Ticket ticket) -> { -+ if (ticket.removeDelay == NO_TIMEOUT_MARKER) { -+ return false; -+ } -+ return --ticket.removeDelay <= 0L; -+ }; -+ -+ for (final Iterator iterator = this.sectionToChunkToExpireCount.keySet().iterator(); iterator.hasNext();) { -+ final RegionFileIOThread.ChunkCoordinate section = iterator.next(); -+ final long sectionKey = section.key; -+ -+ if (!this.sectionToChunkToExpireCount.containsKey(section)) { -+ // removed concurrently -+ continue; -+ } -+ -+ final ReentrantAreaLock.Node ticketLock = this.ticketLockArea.lock( -+ CoordinateUtils.getChunkX(sectionKey) << sectionShift, -+ CoordinateUtils.getChunkZ(sectionKey) << sectionShift -+ ); -+ -+ try { -+ final Long2IntOpenHashMap chunkToExpireCount = this.sectionToChunkToExpireCount.get(section); -+ if (chunkToExpireCount == null) { -+ // lost to some race -+ continue; -+ } -+ -+ for (final Iterator iterator1 = chunkToExpireCount.long2IntEntrySet().fastIterator(); iterator1.hasNext();) { -+ final Long2IntMap.Entry entry = iterator1.next(); -+ -+ final long chunkKey = entry.getLongKey(); -+ final int expireCount = entry.getIntValue(); -+ -+ final RegionFileIOThread.ChunkCoordinate chunk = new RegionFileIOThread.ChunkCoordinate(chunkKey); -+ -+ final SortedArraySet> tickets = this.tickets.get(chunk); -+ final int levelBefore = getTicketLevelAt(tickets); -+ -+ final int sizeBefore = tickets.size(); -+ tickets.removeIf(expireNow); -+ final int sizeAfter = tickets.size(); -+ final int levelAfter = getTicketLevelAt(tickets); -+ -+ if (tickets.isEmpty()) { -+ this.tickets.remove(chunk); -+ } -+ if (levelBefore != levelAfter) { -+ this.updateTicketLevel(chunkKey, levelAfter); -+ } -+ -+ final int newExpireCount = expireCount - (sizeBefore - sizeAfter); -+ -+ if (newExpireCount == expireCount) { -+ continue; -+ } -+ -+ if (newExpireCount != 0) { -+ entry.setValue(newExpireCount); -+ } else { -+ iterator1.remove(); -+ } -+ } -+ -+ if (chunkToExpireCount.isEmpty()) { -+ this.sectionToChunkToExpireCount.remove(section); -+ } -+ } finally { -+ this.ticketLockArea.unlock(ticketLock); -+ } -+ } -+ -+ this.processTicketUpdates(); -+ } -+ -+ public NewChunkHolder getChunkHolder(final int chunkX, final int chunkZ) { -+ return this.chunkHolders.get(CoordinateUtils.getChunkKey(chunkX, chunkZ)); -+ } -+ -+ public NewChunkHolder getChunkHolder(final long position) { -+ return this.chunkHolders.get(position); -+ } -+ -+ public void raisePriority(final int x, final int z, final PrioritisedExecutor.Priority priority) { -+ final NewChunkHolder chunkHolder = this.getChunkHolder(x, z); -+ if (chunkHolder != null) { -+ chunkHolder.raisePriority(priority); -+ } -+ } -+ -+ public void setPriority(final int x, final int z, final PrioritisedExecutor.Priority priority) { -+ final NewChunkHolder chunkHolder = this.getChunkHolder(x, z); -+ if (chunkHolder != null) { -+ chunkHolder.setPriority(priority); -+ } -+ } -+ -+ public void lowerPriority(final int x, final int z, final PrioritisedExecutor.Priority priority) { -+ final NewChunkHolder chunkHolder = this.getChunkHolder(x, z); -+ if (chunkHolder != null) { -+ chunkHolder.lowerPriority(priority); -+ } -+ } -+ -+ private NewChunkHolder createChunkHolder(final long position) { -+ final NewChunkHolder ret = new NewChunkHolder(this.world, CoordinateUtils.getChunkX(position), CoordinateUtils.getChunkZ(position), this.taskScheduler); -+ -+ ChunkSystem.onChunkHolderCreate(this.world, ret.vanillaChunkHolder); -+ ret.vanillaChunkHolder.onChunkAdd(); -+ -+ return ret; -+ } -+ -+ // because this function creates the chunk holder without a ticket, it is the caller's responsibility to ensure -+ // the chunk holder eventually unloads. this should only be used to avoid using processTicketUpdates to create chunkholders, -+ // as processTicketUpdates may call plugin logic; in every other case a ticket is appropriate -+ private NewChunkHolder getOrCreateChunkHolder(final int chunkX, final int chunkZ) { -+ return this.getOrCreateChunkHolder(CoordinateUtils.getChunkKey(chunkX, chunkZ)); -+ } -+ -+ private NewChunkHolder getOrCreateChunkHolder(final long position) { -+ final int chunkX = CoordinateUtils.getChunkX(position); -+ final int chunkZ = CoordinateUtils.getChunkZ(position); -+ -+ if (!this.ticketLockArea.isHeldByCurrentThread(chunkX, chunkZ)) { -+ throw new IllegalStateException("Must hold ticket level update lock!"); -+ } -+ if (!this.taskScheduler.schedulingLockArea.isHeldByCurrentThread(chunkX, chunkZ)) { -+ throw new IllegalStateException("Must hold scheduler lock!!"); -+ } -+ -+ // we could just acquire these locks, but... -+ // must own the locks because the caller needs to ensure that no unload can occur AFTER this function returns -+ -+ NewChunkHolder current = this.chunkHolders.get(position); -+ if (current != null) { -+ return current; -+ } -+ -+ current = this.createChunkHolder(position); -+ synchronized (this.chunkHolders) { -+ this.chunkHolders.put(position, current); -+ } -+ -+ return current; -+ } -+ -+ private final AtomicLong entityLoadCounter = new AtomicLong(); -+ -+ public ChunkEntitySlices getOrCreateEntityChunk(final int chunkX, final int chunkZ, final boolean transientChunk) { -+ TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Cannot create entity chunk off-main"); -+ ChunkEntitySlices ret; -+ -+ NewChunkHolder current = this.getChunkHolder(chunkX, chunkZ); -+ if (current != null && (ret = current.getEntityChunk()) != null && (transientChunk || !ret.isTransient())) { -+ return ret; -+ } -+ -+ final AtomicBoolean isCompleted = new AtomicBoolean(); -+ final Thread waiter = Thread.currentThread(); -+ final Long entityLoadId = Long.valueOf(this.entityLoadCounter.getAndIncrement()); -+ NewChunkHolder.GenericDataLoadTaskCallback loadTask = null; -+ final ReentrantAreaLock.Node ticketLock = this.ticketLockArea.lock(chunkX, chunkZ); -+ try { -+ this.addTicketAtLevel(TicketType.ENTITY_LOAD, chunkX, chunkZ, MAX_TICKET_LEVEL, entityLoadId); -+ final ReentrantAreaLock.Node schedulingLock = this.taskScheduler.schedulingLockArea.lock(chunkX, chunkZ); -+ try { -+ current = this.getOrCreateChunkHolder(chunkX, chunkZ); -+ if ((ret = current.getEntityChunk()) != null && (transientChunk || !ret.isTransient())) { -+ this.removeTicketAtLevel(TicketType.ENTITY_LOAD, chunkX, chunkZ, MAX_TICKET_LEVEL, entityLoadId); -+ return ret; -+ } -+ -+ if (current.isEntityChunkNBTLoaded()) { -+ isCompleted.setPlain(true); -+ } else { -+ loadTask = current.getOrLoadEntityData((final GenericDataLoadTask.TaskResult result) -> { -+ if (!transientChunk) { -+ isCompleted.set(true); -+ LockSupport.unpark(waiter); -+ } -+ }); -+ final ChunkLoadTask.EntityDataLoadTask entityLoad = current.getEntityDataLoadTask(); -+ -+ if (entityLoad != null && !transientChunk) { -+ entityLoad.raisePriority(PrioritisedExecutor.Priority.BLOCKING); -+ } -+ } -+ } finally { -+ this.taskScheduler.schedulingLockArea.unlock(schedulingLock); -+ } -+ } finally { -+ this.ticketLockArea.unlock(ticketLock); -+ } -+ -+ if (loadTask != null) { -+ loadTask.schedule(); -+ } -+ -+ if (!transientChunk) { -+ // Note: no need to busy wait on the chunk queue, entity load will complete off-main -+ boolean interrupted = false; -+ while (!isCompleted.get()) { -+ interrupted |= Thread.interrupted(); -+ LockSupport.park(); -+ } -+ -+ if (interrupted) { -+ Thread.currentThread().interrupt(); -+ } -+ } -+ -+ // now that the entity data is loaded, we can load it into the world -+ -+ ret = current.loadInEntityChunk(transientChunk); -+ -+ final long chunkKey = CoordinateUtils.getChunkKey(chunkX, chunkZ); -+ this.addAndRemoveTickets(chunkKey, -+ TicketType.UNKNOWN, MAX_TICKET_LEVEL, new ChunkPos(chunkX, chunkZ), -+ TicketType.ENTITY_LOAD, MAX_TICKET_LEVEL, entityLoadId -+ ); -+ -+ return ret; -+ } -+ -+ public PoiChunk getPoiChunkIfLoaded(final int chunkX, final int chunkZ, final boolean checkLoadInCallback) { -+ final NewChunkHolder holder = this.getChunkHolder(chunkX, chunkZ); -+ if (holder != null) { -+ final PoiChunk ret = holder.getPoiChunk(); -+ return ret == null || (checkLoadInCallback && !ret.isLoaded()) ? null : ret; -+ } -+ return null; -+ } -+ -+ private final AtomicLong poiLoadCounter = new AtomicLong(); -+ -+ public PoiChunk loadPoiChunk(final int chunkX, final int chunkZ) { -+ TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Cannot create poi chunk off-main"); -+ PoiChunk ret; -+ -+ NewChunkHolder current = this.getChunkHolder(chunkX, chunkZ); -+ if (current != null && (ret = current.getPoiChunk()) != null) { -+ if (!ret.isLoaded()) { -+ ret.load(); -+ } -+ return ret; -+ } -+ -+ final AtomicReference completed = new AtomicReference<>(); -+ final AtomicBoolean isCompleted = new AtomicBoolean(); -+ final Thread waiter = Thread.currentThread(); -+ final Long poiLoadId = Long.valueOf(this.poiLoadCounter.getAndIncrement()); -+ NewChunkHolder.GenericDataLoadTaskCallback loadTask = null; -+ final ca.spottedleaf.concurrentutil.lock.ReentrantAreaLock.Node ticketLock = this.ticketLockArea.lock(chunkX, chunkZ); // Folia - use area based lock to reduce contention -+ try { -+ // Folia - use area based lock to reduce contention -+ this.addTicketAtLevel(TicketType.POI_LOAD, chunkX, chunkZ, MAX_TICKET_LEVEL, poiLoadId); -+ final ca.spottedleaf.concurrentutil.lock.ReentrantAreaLock.Node schedulingLock = this.taskScheduler.schedulingLockArea.lock(chunkX, chunkZ); // Folia - use area based lock to reduce contention -+ try { -+ current = this.getOrCreateChunkHolder(chunkX, chunkZ); -+ if (current.isPoiChunkLoaded()) { -+ this.removeTicketAtLevel(TicketType.POI_LOAD, chunkX, chunkZ, MAX_TICKET_LEVEL, poiLoadId); -+ return current.getPoiChunk(); -+ } -+ -+ loadTask = current.getOrLoadPoiData((final GenericDataLoadTask.TaskResult result) -> { -+ completed.setPlain(result.left()); -+ isCompleted.set(true); -+ LockSupport.unpark(waiter); -+ }); -+ final ChunkLoadTask.PoiDataLoadTask poiLoad = current.getPoiDataLoadTask(); -+ -+ if (poiLoad != null) { -+ poiLoad.raisePriority(PrioritisedExecutor.Priority.BLOCKING); -+ } -+ } finally { -+ this.taskScheduler.schedulingLockArea.unlock(schedulingLock); // Folia - use area based lock to reduce contention -+ } -+ } finally { -+ this.ticketLockArea.unlock(ticketLock); // Folia - use area based lock to reduce contention -+ } -+ -+ if (loadTask != null) { -+ loadTask.schedule(); -+ } -+ -+ // Note: no need to busy wait on the chunk queue, poi load will complete off-main -+ -+ boolean interrupted = false; -+ while (!isCompleted.get()) { -+ interrupted |= Thread.interrupted(); -+ LockSupport.park(); -+ } -+ -+ if (interrupted) { -+ Thread.currentThread().interrupt(); -+ } -+ -+ ret = completed.getPlain(); -+ -+ ret.load(); -+ -+ final long chunkKey = CoordinateUtils.getChunkKey(chunkX, chunkZ); -+ this.addAndRemoveTickets(chunkKey, -+ TicketType.UNKNOWN, MAX_TICKET_LEVEL, new ChunkPos(chunkX, chunkZ), -+ TicketType.POI_LOAD, MAX_TICKET_LEVEL, poiLoadId -+ ); -+ -+ return ret; -+ } -+ -+ void addChangedStatuses(final List changedFullStatus) { -+ if (changedFullStatus.isEmpty()) { -+ return; -+ } -+ if (!TickThread.isTickThread()) { -+ this.taskScheduler.scheduleChunkTask(() -> { -+ final ArrayDeque pendingFullLoadUpdate = ChunkHolderManager.this.pendingFullLoadUpdate; -+ for (int i = 0, len = changedFullStatus.size(); i < len; ++i) { -+ pendingFullLoadUpdate.add(changedFullStatus.get(i)); -+ } -+ -+ ChunkHolderManager.this.processPendingFullUpdate(); -+ }, PrioritisedExecutor.Priority.HIGHEST); -+ } else { -+ final ArrayDeque pendingFullLoadUpdate = this.pendingFullLoadUpdate; -+ for (int i = 0, len = changedFullStatus.size(); i < len; ++i) { -+ pendingFullLoadUpdate.add(changedFullStatus.get(i)); -+ } -+ } -+ } -+ -+ private void removeChunkHolder(final NewChunkHolder holder) { -+ holder.killed = true; -+ holder.vanillaChunkHolder.onChunkRemove(); -+ this.autoSaveQueue.remove(holder); -+ ChunkSystem.onChunkHolderDelete(this.world, holder.vanillaChunkHolder); -+ synchronized (this.chunkHolders) { -+ this.chunkHolders.remove(CoordinateUtils.getChunkKey(holder.chunkX, holder.chunkZ)); -+ } -+ } -+ -+ // note: never call while inside the chunk system, this will absolutely break everything -+ public void processUnloads() { -+ TickThread.ensureTickThread("Cannot unload chunks off-main"); -+ -+ if (BLOCK_TICKET_UPDATES.get() == Boolean.TRUE) { -+ throw new IllegalStateException("Cannot unload chunks recursively"); -+ } -+ final int sectionShift = this.unloadQueue.coordinateShift; // sectionShift <= lock shift -+ final List unloadSectionsForRegion = this.unloadQueue.retrieveForAllRegions(); -+ int unloadCountTentative = 0; -+ for (final ChunkQueue.SectionToUnload sectionRef : unloadSectionsForRegion) { -+ final ChunkQueue.UnloadSection section -+ = this.unloadQueue.getSectionUnsynchronized(sectionRef.sectionX(), sectionRef.sectionZ()); -+ -+ if (section == null) { -+ // removed concurrently -+ continue; -+ } -+ -+ // technically reading the size field is unsafe, and it may be incorrect. -+ // We assume that the error here cumulatively goes away over many ticks. If it did not, then it is possible -+ // for chunks to never unload or not unload fast enough. -+ unloadCountTentative += section.chunks.size(); -+ } -+ -+ if (unloadCountTentative <= 0) { -+ // no work to do -+ return; -+ } -+ -+ // Note: The behaviour that we process ticket updates while holding the lock has been dropped here, as it is racey behavior. -+ // But, we do need to process updates here so that any add ticket that is synchronised before this call does not go missed. -+ this.processTicketUpdates(); -+ -+ final int toUnloadCount = Math.max(50, (int)(unloadCountTentative * 0.05)); -+ int processedCount = 0; -+ -+ for (final ChunkQueue.SectionToUnload sectionRef : unloadSectionsForRegion) { -+ final List stage1 = new ArrayList<>(); -+ final List stage2 = new ArrayList<>(); -+ -+ final int sectionLowerX = sectionRef.sectionX() << sectionShift; -+ final int sectionLowerZ = sectionRef.sectionZ() << sectionShift; -+ -+ // stage 1: set up for stage 2 while holding critical locks -+ ReentrantAreaLock.Node ticketLock = this.ticketLockArea.lock(sectionLowerX, sectionLowerZ); -+ try { -+ final ReentrantAreaLock.Node scheduleLock = this.taskScheduler.schedulingLockArea.lock(sectionLowerX, sectionLowerZ); -+ try { -+ final ChunkQueue.UnloadSection section -+ = this.unloadQueue.getSectionUnsynchronized(sectionRef.sectionX(), sectionRef.sectionZ()); -+ -+ if (section == null) { -+ // removed concurrently -+ continue; -+ } -+ -+ // collect the holders to run stage 1 on -+ final int sectionCount = section.chunks.size(); -+ -+ if ((sectionCount + processedCount) <= toUnloadCount) { -+ // we can just drain the entire section -+ -+ for (final LongIterator iterator = section.chunks.iterator(); iterator.hasNext();) { -+ final NewChunkHolder holder = this.chunkHolders.get(iterator.nextLong()); -+ if (holder == null) { -+ throw new IllegalStateException(); -+ } -+ stage1.add(holder); -+ } -+ -+ // remove section -+ this.unloadQueue.removeSection(sectionRef.sectionX(), sectionRef.sectionZ()); -+ } else { -+ // processedCount + len = toUnloadCount -+ // we cannot drain the entire section -+ for (int i = 0, len = toUnloadCount - processedCount; i < len; ++i) { -+ final NewChunkHolder holder = this.chunkHolders.get(section.chunks.removeFirstLong()); -+ if (holder == null) { -+ throw new IllegalStateException(); -+ } -+ stage1.add(holder); -+ } -+ } -+ -+ // run stage 1 -+ for (int i = 0, len = stage1.size(); i < len; ++i) { -+ final NewChunkHolder chunkHolder = stage1.get(i); -+ if (chunkHolder.isSafeToUnload() != null) { -+ LOGGER.error("Chunkholder " + chunkHolder + " is not safe to unload but is inside the unload queue?"); -+ continue; -+ } -+ final NewChunkHolder.UnloadState state = chunkHolder.unloadStage1(); -+ if (state == null) { -+ // can unload immediately -+ this.removeChunkHolder(chunkHolder); -+ continue; -+ } -+ stage2.add(state); -+ } -+ } finally { -+ this.taskScheduler.schedulingLockArea.unlock(scheduleLock); -+ } -+ } finally { -+ this.ticketLockArea.unlock(ticketLock); -+ } -+ -+ // stage 2: invoke expensive unload logic, designed to run without locks thanks to stage 1 -+ final List stage3 = new ArrayList<>(stage2.size()); -+ -+ final Boolean before = this.blockTicketUpdates(); -+ try { -+ for (int i = 0, len = stage2.size(); i < len; ++i) { -+ final NewChunkHolder.UnloadState state = stage2.get(i); -+ final NewChunkHolder holder = state.holder(); -+ -+ holder.unloadStage2(state); -+ stage3.add(holder); -+ } -+ } finally { -+ this.unblockTicketUpdates(before); -+ } -+ -+ // stage 3: actually attempt to remove the chunk holders -+ ticketLock = this.ticketLockArea.lock(sectionLowerX, sectionLowerZ); -+ try { -+ final ReentrantAreaLock.Node scheduleLock = this.taskScheduler.schedulingLockArea.lock(sectionLowerX, sectionLowerZ); -+ try { -+ for (int i = 0, len = stage3.size(); i < len; ++i) { -+ final NewChunkHolder holder = stage3.get(i); -+ -+ if (holder.unloadStage3()) { -+ this.removeChunkHolder(holder); -+ } else { -+ // add cooldown so the next unload check is not immediately next tick -+ this.addTicketAtLevel(TicketType.UNLOAD_COOLDOWN, CoordinateUtils.getChunkKey(holder.chunkX, holder.chunkZ), MAX_TICKET_LEVEL, Unit.INSTANCE, false); -+ } -+ } -+ } finally { -+ this.taskScheduler.schedulingLockArea.unlock(scheduleLock); -+ } -+ } finally { -+ this.ticketLockArea.unlock(ticketLock); -+ } -+ -+ processedCount += stage1.size(); -+ -+ if (processedCount >= toUnloadCount) { -+ break; -+ } -+ } -+ } -+ -+ public enum TicketOperationType { -+ ADD, REMOVE, ADD_IF_REMOVED, ADD_AND_REMOVE -+ } -+ -+ public static record TicketOperation ( -+ TicketOperationType op, long chunkCoord, -+ TicketType ticketType, int ticketLevel, T identifier, -+ TicketType ticketType2, int ticketLevel2, V identifier2 -+ ) { -+ -+ private TicketOperation(TicketOperationType op, long chunkCoord, -+ TicketType ticketType, int ticketLevel, T identifier) { -+ this(op, chunkCoord, ticketType, ticketLevel, identifier, null, 0, null); -+ } -+ -+ public static TicketOperation addOp(final ChunkPos chunk, final TicketType type, final int ticketLevel, final T identifier) { -+ return addOp(CoordinateUtils.getChunkKey(chunk), type, ticketLevel, identifier); -+ } -+ -+ public static TicketOperation addOp(final int chunkX, final int chunkZ, final TicketType type, final int ticketLevel, final T identifier) { -+ return addOp(CoordinateUtils.getChunkKey(chunkX, chunkZ), type, ticketLevel, identifier); -+ } -+ -+ public static TicketOperation addOp(final long chunk, final TicketType type, final int ticketLevel, final T identifier) { -+ return new TicketOperation<>(TicketOperationType.ADD, chunk, type, ticketLevel, identifier); -+ } -+ -+ public static TicketOperation removeOp(final ChunkPos chunk, final TicketType type, final int ticketLevel, final T identifier) { -+ return removeOp(CoordinateUtils.getChunkKey(chunk), type, ticketLevel, identifier); -+ } -+ -+ public static TicketOperation removeOp(final int chunkX, final int chunkZ, final TicketType type, final int ticketLevel, final T identifier) { -+ return removeOp(CoordinateUtils.getChunkKey(chunkX, chunkZ), type, ticketLevel, identifier); -+ } -+ -+ public static TicketOperation removeOp(final long chunk, final TicketType type, final int ticketLevel, final T identifier) { -+ return new TicketOperation<>(TicketOperationType.REMOVE, chunk, type, ticketLevel, identifier); -+ } -+ -+ public static TicketOperation addIfRemovedOp(final long chunk, -+ final TicketType addType, final int addLevel, final T addIdentifier, -+ final TicketType removeType, final int removeLevel, final V removeIdentifier) { -+ return new TicketOperation<>( -+ TicketOperationType.ADD_IF_REMOVED, chunk, addType, addLevel, addIdentifier, -+ removeType, removeLevel, removeIdentifier -+ ); -+ } -+ -+ public static TicketOperation addAndRemove(final long chunk, -+ final TicketType addType, final int addLevel, final T addIdentifier, -+ final TicketType removeType, final int removeLevel, final V removeIdentifier) { -+ return new TicketOperation<>( -+ TicketOperationType.ADD_AND_REMOVE, chunk, addType, addLevel, addIdentifier, -+ removeType, removeLevel, removeIdentifier -+ ); -+ } -+ } -+ -+ private boolean processTicketOp(TicketOperation operation) { -+ boolean ret = false; -+ switch (operation.op) { -+ case ADD: { -+ ret |= this.addTicketAtLevel(operation.ticketType, operation.chunkCoord, operation.ticketLevel, operation.identifier); -+ break; -+ } -+ case REMOVE: { -+ ret |= this.removeTicketAtLevel(operation.ticketType, operation.chunkCoord, operation.ticketLevel, operation.identifier); -+ break; -+ } -+ case ADD_IF_REMOVED: { -+ ret |= this.addIfRemovedTicket( -+ operation.chunkCoord, -+ operation.ticketType, operation.ticketLevel, operation.identifier, -+ operation.ticketType2, operation.ticketLevel2, operation.identifier2 -+ ); -+ break; -+ } -+ case ADD_AND_REMOVE: { -+ ret = true; -+ this.addAndRemoveTickets( -+ operation.chunkCoord, -+ operation.ticketType, operation.ticketLevel, operation.identifier, -+ operation.ticketType2, operation.ticketLevel2, operation.identifier2 -+ ); -+ break; -+ } -+ } -+ -+ return ret; -+ } -+ -+ public void performTicketUpdates(final Collection> operations) { -+ for (final TicketOperation operation : operations) { -+ this.processTicketOp(operation); -+ } -+ } -+ -+ private final ThreadLocal BLOCK_TICKET_UPDATES = ThreadLocal.withInitial(() -> { -+ return Boolean.FALSE; -+ }); -+ -+ public Boolean blockTicketUpdates() { -+ final Boolean ret = BLOCK_TICKET_UPDATES.get(); -+ BLOCK_TICKET_UPDATES.set(Boolean.TRUE); -+ return ret; -+ } -+ -+ public void unblockTicketUpdates(final Boolean before) { -+ BLOCK_TICKET_UPDATES.set(before); -+ } -+ -+ public boolean processTicketUpdates() { -+ return this.processTicketUpdates(true, true, null); -+ } -+ -+ private static final ThreadLocal> CURRENT_TICKET_UPDATE_SCHEDULING = new ThreadLocal<>(); -+ -+ static List getCurrentTicketUpdateScheduling() { -+ return CURRENT_TICKET_UPDATE_SCHEDULING.get(); -+ } -+ -+ private boolean processTicketUpdates(final boolean checkLocks, final boolean processFullUpdates, List scheduledTasks) { -+ TickThread.ensureTickThread("Cannot process ticket levels off-main"); -+ if (BLOCK_TICKET_UPDATES.get() == Boolean.TRUE) { -+ throw new IllegalStateException("Cannot update ticket level while unloading chunks or updating entity manager"); -+ } -+ -+ List changedFullStatus = null; -+ -+ final boolean isTickThread = TickThread.isTickThread(); -+ -+ boolean ret = false; -+ final boolean canProcessFullUpdates = processFullUpdates & isTickThread; -+ final boolean canProcessScheduling = scheduledTasks == null; -+ -+ if (this.ticketLevelPropagator.hasPendingUpdates()) { -+ if (scheduledTasks == null) { -+ scheduledTasks = new ArrayList<>(); -+ } -+ changedFullStatus = new ArrayList<>(); -+ -+ ret |= this.ticketLevelPropagator.performUpdates( -+ this.ticketLockArea, this.taskScheduler.schedulingLockArea, -+ scheduledTasks, changedFullStatus -+ ); -+ } -+ -+ if (changedFullStatus != null) { -+ this.addChangedStatuses(changedFullStatus); -+ } -+ -+ if (canProcessScheduling && scheduledTasks != null) { -+ for (int i = 0, len = scheduledTasks.size(); i < len; ++i) { -+ scheduledTasks.get(i).schedule(); -+ } -+ } -+ -+ if (canProcessFullUpdates) { -+ ret |= this.processPendingFullUpdate(); -+ } -+ -+ return ret; -+ } -+ -+ // only call on tick thread -+ protected final boolean processPendingFullUpdate() { -+ final ArrayDeque pendingFullLoadUpdate = this.pendingFullLoadUpdate; -+ -+ boolean ret = false; -+ -+ List changedFullStatus = new ArrayList<>(); -+ -+ NewChunkHolder holder; -+ while ((holder = pendingFullLoadUpdate.poll()) != null) { -+ ret |= holder.handleFullStatusChange(changedFullStatus); -+ -+ if (!changedFullStatus.isEmpty()) { -+ for (int i = 0, len = changedFullStatus.size(); i < len; ++i) { -+ pendingFullLoadUpdate.add(changedFullStatus.get(i)); -+ } -+ changedFullStatus.clear(); -+ } -+ } -+ -+ return ret; -+ } -+ -+ public JsonObject getDebugJsonForWatchdog() { -+ return this.getDebugJsonNoLock(); -+ } -+ -+ private JsonObject getDebugJsonNoLock() { -+ final JsonObject ret = new JsonObject(); -+ ret.addProperty("current_tick", Long.valueOf(this.currentTick)); -+ -+ final JsonArray unloadQueue = new JsonArray(); -+ ret.add("unload_queue", unloadQueue); -+ ret.addProperty("lock_shift", Integer.valueOf(this.taskScheduler.getChunkSystemLockShift())); -+ ret.addProperty("ticket_shift", Integer.valueOf(ThreadedTicketLevelPropagator.SECTION_SHIFT)); -+ ret.addProperty("region_shift", Integer.valueOf(this.world.getRegionChunkShift())); -+ for (final ChunkQueue.SectionToUnload section : this.unloadQueue.retrieveForAllRegions()) { -+ final JsonObject sectionJson = new JsonObject(); -+ unloadQueue.add(sectionJson); -+ sectionJson.addProperty("sectionX", section.sectionX()); -+ sectionJson.addProperty("sectionZ", section.sectionX()); -+ sectionJson.addProperty("order", section.order()); -+ -+ final JsonArray coordinates = new JsonArray(); -+ sectionJson.add("coordinates", coordinates); -+ -+ final ChunkQueue.UnloadSection actualSection = this.unloadQueue.getSectionUnsynchronized(section.sectionX(), section.sectionZ()); -+ for (final LongIterator iterator = actualSection.chunks.iterator(); iterator.hasNext();) { -+ final long coordinate = iterator.nextLong(); -+ -+ final JsonObject coordinateJson = new JsonObject(); -+ coordinates.add(coordinateJson); -+ -+ coordinateJson.addProperty("chunkX", Integer.valueOf(CoordinateUtils.getChunkX(coordinate))); -+ coordinateJson.addProperty("chunkZ", Integer.valueOf(CoordinateUtils.getChunkZ(coordinate))); -+ } -+ } -+ -+ final JsonArray holders = new JsonArray(); -+ ret.add("chunkholders", holders); -+ -+ for (final NewChunkHolder holder : this.getChunkHolders()) { -+ holders.add(holder.getDebugJson()); -+ } -+ -+ // TODO -+ /* -+ final JsonArray removeTickToChunkExpireTicketCount = new JsonArray(); -+ ret.add("remove_tick_to_chunk_expire_ticket_count", removeTickToChunkExpireTicketCount); -+ -+ for (final Long2ObjectMap.Entry tickEntry : this.removeTickToChunkExpireTicketCount.long2ObjectEntrySet()) { -+ final long tick = tickEntry.getLongKey(); -+ final Long2IntOpenHashMap coordinateToCount = tickEntry.getValue(); -+ -+ final JsonObject tickJson = new JsonObject(); -+ removeTickToChunkExpireTicketCount.add(tickJson); -+ -+ tickJson.addProperty("tick", Long.valueOf(tick)); -+ -+ final JsonArray tickEntries = new JsonArray(); -+ tickJson.add("entries", tickEntries); -+ -+ for (final Long2IntMap.Entry entry : coordinateToCount.long2IntEntrySet()) { -+ final long coordinate = entry.getLongKey(); -+ final int count = entry.getIntValue(); -+ -+ final JsonObject entryJson = new JsonObject(); -+ tickEntries.add(entryJson); -+ -+ entryJson.addProperty("chunkX", Long.valueOf(CoordinateUtils.getChunkX(coordinate))); -+ entryJson.addProperty("chunkZ", Long.valueOf(CoordinateUtils.getChunkZ(coordinate))); -+ entryJson.addProperty("count", Integer.valueOf(count)); -+ } -+ } -+ -+ final JsonArray allTicketsJson = new JsonArray(); -+ ret.add("tickets", allTicketsJson); -+ -+ for (final Long2ObjectMap.Entry>> coordinateTickets : this.tickets.long2ObjectEntrySet()) { -+ final long coordinate = coordinateTickets.getLongKey(); -+ final SortedArraySet> tickets = coordinateTickets.getValue(); -+ -+ final JsonObject coordinateJson = new JsonObject(); -+ allTicketsJson.add(coordinateJson); -+ -+ coordinateJson.addProperty("chunkX", Long.valueOf(CoordinateUtils.getChunkX(coordinate))); -+ coordinateJson.addProperty("chunkZ", Long.valueOf(CoordinateUtils.getChunkZ(coordinate))); -+ -+ final JsonArray ticketsSerialized = new JsonArray(); -+ coordinateJson.add("tickets", ticketsSerialized); -+ -+ for (final Ticket ticket : tickets) { -+ final JsonObject ticketSerialized = new JsonObject(); -+ ticketsSerialized.add(ticketSerialized); -+ -+ ticketSerialized.addProperty("type", ticket.getType().toString()); -+ ticketSerialized.addProperty("level", Integer.valueOf(ticket.getTicketLevel())); -+ ticketSerialized.addProperty("identifier", Objects.toString(ticket.key)); -+ ticketSerialized.addProperty("remove_tick", Long.valueOf(ticket.removalTick)); -+ } -+ } -+ */ -+ -+ return ret; -+ } -+ -+ public JsonObject getDebugJson() { -+ return this.getDebugJsonNoLock(); // Folia - use area based lock to reduce contention -+ } -+} -diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkLightTask.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkLightTask.java -new file mode 100644 -index 0000000000000000000000000000000000000000..86e618586d2ad9d843ad761b7336bb3073ed4c23 ---- /dev/null -+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkLightTask.java -@@ -0,0 +1,181 @@ -+package io.papermc.paper.chunk.system.scheduling; -+ -+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; -+import ca.spottedleaf.starlight.common.light.StarLightEngine; -+import ca.spottedleaf.starlight.common.light.StarLightInterface; -+import io.papermc.paper.chunk.system.light.LightQueue; -+import net.minecraft.server.level.ServerLevel; -+import net.minecraft.world.level.ChunkPos; -+import net.minecraft.world.level.chunk.ChunkAccess; -+import net.minecraft.world.level.chunk.status.ChunkStatus; -+import net.minecraft.world.level.chunk.ProtoChunk; -+import org.apache.logging.log4j.LogManager; -+import org.apache.logging.log4j.Logger; -+import java.util.function.BooleanSupplier; -+ -+public final class ChunkLightTask extends ChunkProgressionTask { -+ -+ private static final Logger LOGGER = LogManager.getLogger(); -+ -+ protected final ChunkAccess fromChunk; -+ -+ private final LightTaskPriorityHolder priorityHolder; -+ -+ public ChunkLightTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX, final int chunkZ, -+ final ChunkAccess chunk, final PrioritisedExecutor.Priority priority) { -+ super(scheduler, world, chunkX, chunkZ); -+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { -+ throw new IllegalArgumentException("Invalid priority " + priority); -+ } -+ this.priorityHolder = new LightTaskPriorityHolder(priority, this); -+ this.fromChunk = chunk; -+ } -+ -+ @Override -+ public boolean isScheduled() { -+ return this.priorityHolder.isScheduled(); -+ } -+ -+ @Override -+ public ChunkStatus getTargetStatus() { -+ return ChunkStatus.LIGHT; -+ } -+ -+ @Override -+ public void schedule() { -+ this.priorityHolder.schedule(); -+ } -+ -+ @Override -+ public void cancel() { -+ this.priorityHolder.cancel(); -+ } -+ -+ @Override -+ public PrioritisedExecutor.Priority getPriority() { -+ return this.priorityHolder.getPriority(); -+ } -+ -+ @Override -+ public void lowerPriority(final PrioritisedExecutor.Priority priority) { -+ this.priorityHolder.raisePriority(priority); -+ } -+ -+ @Override -+ public void setPriority(final PrioritisedExecutor.Priority priority) { -+ this.priorityHolder.setPriority(priority); -+ } -+ -+ @Override -+ public void raisePriority(final PrioritisedExecutor.Priority priority) { -+ this.priorityHolder.raisePriority(priority); -+ } -+ -+ private static final class LightTaskPriorityHolder extends PriorityHolder { -+ -+ protected final ChunkLightTask task; -+ -+ protected LightTaskPriorityHolder(final PrioritisedExecutor.Priority priority, final ChunkLightTask task) { -+ super(priority); -+ this.task = task; -+ } -+ -+ @Override -+ protected void cancelScheduled() { -+ final ChunkLightTask task = this.task; -+ task.complete(null, null); -+ } -+ -+ @Override -+ protected PrioritisedExecutor.Priority getScheduledPriority() { -+ final ChunkLightTask task = this.task; -+ return task.world.getChunkSource().getLightEngine().theLightEngine.lightQueue.getPriority(task.chunkX, task.chunkZ); -+ } -+ -+ @Override -+ protected void scheduleTask(final PrioritisedExecutor.Priority priority) { -+ final ChunkLightTask task = this.task; -+ final StarLightInterface starLightInterface = task.world.getChunkSource().getLightEngine().theLightEngine; -+ final LightQueue lightQueue = starLightInterface.lightQueue; -+ lightQueue.queueChunkLightTask(new ChunkPos(task.chunkX, task.chunkZ), new LightTask(starLightInterface, task), priority); -+ lightQueue.setPriority(task.chunkX, task.chunkZ, priority); -+ } -+ -+ @Override -+ protected void lowerPriorityScheduled(final PrioritisedExecutor.Priority priority) { -+ final ChunkLightTask task = this.task; -+ final StarLightInterface starLightInterface = task.world.getChunkSource().getLightEngine().theLightEngine; -+ final LightQueue lightQueue = starLightInterface.lightQueue; -+ lightQueue.lowerPriority(task.chunkX, task.chunkZ, priority); -+ } -+ -+ @Override -+ protected void setPriorityScheduled(final PrioritisedExecutor.Priority priority) { -+ final ChunkLightTask task = this.task; -+ final StarLightInterface starLightInterface = task.world.getChunkSource().getLightEngine().theLightEngine; -+ final LightQueue lightQueue = starLightInterface.lightQueue; -+ lightQueue.setPriority(task.chunkX, task.chunkZ, priority); -+ } -+ -+ @Override -+ protected void raisePriorityScheduled(final PrioritisedExecutor.Priority priority) { -+ final ChunkLightTask task = this.task; -+ final StarLightInterface starLightInterface = task.world.getChunkSource().getLightEngine().theLightEngine; -+ final LightQueue lightQueue = starLightInterface.lightQueue; -+ lightQueue.raisePriority(task.chunkX, task.chunkZ, priority); -+ } -+ } -+ -+ private static final class LightTask implements BooleanSupplier { -+ -+ protected final StarLightInterface lightEngine; -+ protected final ChunkLightTask task; -+ -+ public LightTask(final StarLightInterface lightEngine, final ChunkLightTask task) { -+ this.lightEngine = lightEngine; -+ this.task = task; -+ } -+ -+ @Override -+ public boolean getAsBoolean() { -+ final ChunkLightTask task = this.task; -+ // executed on light thread -+ if (!task.priorityHolder.markExecuting()) { -+ // cancelled -+ return false; -+ } -+ -+ try { -+ final Boolean[] emptySections = StarLightEngine.getEmptySectionsForChunk(task.fromChunk); -+ -+ if (task.fromChunk.isLightCorrect() && task.fromChunk.getStatus().isOrAfter(ChunkStatus.LIGHT)) { -+ this.lightEngine.forceLoadInChunk(task.fromChunk, emptySections); -+ this.lightEngine.checkChunkEdges(task.chunkX, task.chunkZ); -+ } else { -+ task.fromChunk.setLightCorrect(false); -+ this.lightEngine.lightChunk(task.fromChunk, emptySections); -+ task.fromChunk.setLightCorrect(true); -+ } -+ // we need to advance status -+ if (task.fromChunk instanceof ProtoChunk chunk && chunk.getStatus() == ChunkStatus.LIGHT.getParent()) { -+ chunk.setStatus(ChunkStatus.LIGHT); -+ } -+ } catch (final Throwable thr) { -+ if (!(thr instanceof ThreadDeath)) { -+ LOGGER.fatal("Failed to light chunk " + task.fromChunk.getPos().toString() + " in world '" + this.lightEngine.getWorld().getWorld().getName() + "'", thr); -+ } -+ -+ task.complete(null, thr); -+ -+ if (thr instanceof ThreadDeath) { -+ throw (ThreadDeath)thr; -+ } -+ -+ return true; -+ } -+ -+ task.complete(task.fromChunk, null); -+ return true; -+ } -+ } -+} -diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkLoadTask.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkLoadTask.java -new file mode 100644 -index 0000000000000000000000000000000000000000..5ff994d5af24b0bdd7b3a16e245b2c4100bef3f0 ---- /dev/null -+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkLoadTask.java -@@ -0,0 +1,484 @@ -+package io.papermc.paper.chunk.system.scheduling; -+ -+import ca.spottedleaf.concurrentutil.collection.MultiThreadedQueue; -+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; -+import ca.spottedleaf.concurrentutil.lock.ReentrantAreaLock; -+import ca.spottedleaf.concurrentutil.util.ConcurrentUtil; -+import ca.spottedleaf.dataconverter.minecraft.MCDataConverter; -+import ca.spottedleaf.dataconverter.minecraft.datatypes.MCTypeRegistry; -+import com.mojang.logging.LogUtils; -+import io.papermc.paper.chunk.system.io.RegionFileIOThread; -+import io.papermc.paper.chunk.system.poi.PoiChunk; -+import net.minecraft.SharedConstants; -+import net.minecraft.core.registries.Registries; -+import net.minecraft.nbt.CompoundTag; -+import net.minecraft.server.level.ChunkMap; -+import net.minecraft.server.level.ServerLevel; -+import net.minecraft.world.level.ChunkPos; -+import net.minecraft.world.level.chunk.ChunkAccess; -+import net.minecraft.world.level.chunk.status.ChunkStatus; -+import net.minecraft.world.level.chunk.ProtoChunk; -+import net.minecraft.world.level.chunk.UpgradeData; -+import net.minecraft.world.level.chunk.storage.ChunkSerializer; -+import net.minecraft.world.level.chunk.storage.EntityStorage; -+import net.minecraft.world.level.levelgen.blending.BlendingData; -+import org.slf4j.Logger; -+import java.lang.invoke.VarHandle; -+import java.util.Map; -+import java.util.concurrent.atomic.AtomicInteger; -+import java.util.function.Consumer; -+ -+public final class ChunkLoadTask extends ChunkProgressionTask { -+ -+ private static final Logger LOGGER = LogUtils.getClassLogger(); -+ -+ private final NewChunkHolder chunkHolder; -+ private final ChunkDataLoadTask loadTask; -+ -+ private volatile boolean cancelled; -+ private NewChunkHolder.GenericDataLoadTaskCallback entityLoadTask; -+ private NewChunkHolder.GenericDataLoadTaskCallback poiLoadTask; -+ private GenericDataLoadTask.TaskResult loadResult; -+ private final AtomicInteger taskCountToComplete = new AtomicInteger(3); // one for poi, one for entity, and one for chunk data -+ -+ protected ChunkLoadTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX, final int chunkZ, -+ final NewChunkHolder chunkHolder, final PrioritisedExecutor.Priority priority) { -+ super(scheduler, world, chunkX, chunkZ); -+ this.chunkHolder = chunkHolder; -+ this.loadTask = new ChunkDataLoadTask(scheduler, world, chunkX, chunkZ, priority); -+ this.loadTask.addCallback((final GenericDataLoadTask.TaskResult result) -> { -+ ChunkLoadTask.this.loadResult = result; // must be before getAndDecrement -+ ChunkLoadTask.this.tryCompleteLoad(); -+ }); -+ } -+ -+ private void tryCompleteLoad() { -+ if (this.taskCountToComplete.decrementAndGet() == 0) { -+ final GenericDataLoadTask.TaskResult result = this.cancelled ? null : this.loadResult; // only after the getAndDecrement -+ ChunkLoadTask.this.complete(result == null ? null : result.left(), result == null ? null : result.right()); -+ } -+ } -+ -+ @Override -+ public ChunkStatus getTargetStatus() { -+ return ChunkStatus.EMPTY; -+ } -+ -+ private boolean scheduled; -+ -+ @Override -+ public boolean isScheduled() { -+ return this.scheduled; -+ } -+ -+ @Override -+ public void schedule() { -+ final NewChunkHolder.GenericDataLoadTaskCallback entityLoadTask; -+ final NewChunkHolder.GenericDataLoadTaskCallback poiLoadTask; -+ -+ final Consumer> scheduleLoadTask = (final GenericDataLoadTask.TaskResult result) -> { -+ ChunkLoadTask.this.tryCompleteLoad(); -+ }; -+ -+ // NOTE: it is IMPOSSIBLE for getOrLoadEntityData/getOrLoadPoiData to complete synchronously, because -+ // they must schedule a task to off main or to on main to complete -+ final ReentrantAreaLock.Node schedulingLock = this.scheduler.schedulingLockArea.lock(this.chunkX, this.chunkZ); -+ try { -+ if (this.scheduled) { -+ throw new IllegalStateException("schedule() called twice"); -+ } -+ this.scheduled = true; -+ if (this.cancelled) { -+ return; -+ } -+ if (!this.chunkHolder.isEntityChunkNBTLoaded()) { -+ entityLoadTask = this.chunkHolder.getOrLoadEntityData((Consumer)scheduleLoadTask); -+ } else { -+ entityLoadTask = null; -+ this.taskCountToComplete.getAndDecrement(); // we know the chunk load is not done here, as it is not scheduled -+ } -+ -+ if (!this.chunkHolder.isPoiChunkLoaded()) { -+ poiLoadTask = this.chunkHolder.getOrLoadPoiData((Consumer)scheduleLoadTask); -+ } else { -+ poiLoadTask = null; -+ this.taskCountToComplete.getAndDecrement(); // we know the chunk load is not done here, as it is not scheduled -+ } -+ -+ this.entityLoadTask = entityLoadTask; -+ this.poiLoadTask = poiLoadTask; -+ } finally { -+ this.scheduler.schedulingLockArea.unlock(schedulingLock); -+ } -+ -+ if (entityLoadTask != null) { -+ entityLoadTask.schedule(); -+ } -+ -+ if (poiLoadTask != null) { -+ poiLoadTask.schedule(); -+ } -+ -+ this.loadTask.schedule(false); -+ } -+ -+ @Override -+ public void cancel() { -+ // must be before load task access, so we can synchronise with the writes to the fields -+ final boolean scheduled; -+ final ReentrantAreaLock.Node schedulingLock = this.scheduler.schedulingLockArea.lock(this.chunkX, this.chunkZ); -+ try { -+ // must read field here, as it may be written later conucrrently - -+ // we need to know if we scheduled _before_ cancellation -+ scheduled = this.scheduled; -+ this.cancelled = true; -+ } finally { -+ this.scheduler.schedulingLockArea.unlock(schedulingLock); -+ } -+ -+ /* -+ Note: The entityLoadTask/poiLoadTask do not complete when cancelled, -+ so we need to manually try to complete in those cases -+ It is also important to note that we set the cancelled field first, just in case -+ the chunk load task attempts to complete with a non-null value -+ */ -+ -+ if (scheduled) { -+ // since we scheduled, we need to cancel the tasks -+ if (this.entityLoadTask != null) { -+ if (this.entityLoadTask.cancel()) { -+ this.tryCompleteLoad(); -+ } -+ } -+ if (this.poiLoadTask != null) { -+ if (this.poiLoadTask.cancel()) { -+ this.tryCompleteLoad(); -+ } -+ } -+ } else { -+ // since nothing was scheduled, we need to decrement the task count here ourselves -+ -+ // for entity load task -+ this.tryCompleteLoad(); -+ -+ // for poi load task -+ this.tryCompleteLoad(); -+ } -+ this.loadTask.cancel(); -+ } -+ -+ @Override -+ public PrioritisedExecutor.Priority getPriority() { -+ return this.loadTask.getPriority(); -+ } -+ -+ @Override -+ public void lowerPriority(final PrioritisedExecutor.Priority priority) { -+ final EntityDataLoadTask entityLoad = this.chunkHolder.getEntityDataLoadTask(); -+ if (entityLoad != null) { -+ entityLoad.lowerPriority(priority); -+ } -+ -+ final PoiDataLoadTask poiLoad = this.chunkHolder.getPoiDataLoadTask(); -+ -+ if (poiLoad != null) { -+ poiLoad.lowerPriority(priority); -+ } -+ -+ this.loadTask.lowerPriority(priority); -+ } -+ -+ @Override -+ public void setPriority(final PrioritisedExecutor.Priority priority) { -+ final EntityDataLoadTask entityLoad = this.chunkHolder.getEntityDataLoadTask(); -+ if (entityLoad != null) { -+ entityLoad.setPriority(priority); -+ } -+ -+ final PoiDataLoadTask poiLoad = this.chunkHolder.getPoiDataLoadTask(); -+ -+ if (poiLoad != null) { -+ poiLoad.setPriority(priority); -+ } -+ -+ this.loadTask.setPriority(priority); -+ } -+ -+ @Override -+ public void raisePriority(final PrioritisedExecutor.Priority priority) { -+ final EntityDataLoadTask entityLoad = this.chunkHolder.getEntityDataLoadTask(); -+ if (entityLoad != null) { -+ entityLoad.raisePriority(priority); -+ } -+ -+ final PoiDataLoadTask poiLoad = this.chunkHolder.getPoiDataLoadTask(); -+ -+ if (poiLoad != null) { -+ poiLoad.raisePriority(priority); -+ } -+ -+ this.loadTask.raisePriority(priority); -+ } -+ -+ protected static abstract class CallbackDataLoadTask extends GenericDataLoadTask { -+ -+ private TaskResult result; -+ private final MultiThreadedQueue>> waiters = new MultiThreadedQueue<>(); -+ -+ protected volatile boolean completed; -+ protected static final VarHandle COMPLETED_HANDLE = ConcurrentUtil.getVarHandle(CallbackDataLoadTask.class, "completed", boolean.class); -+ -+ protected CallbackDataLoadTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX, -+ final int chunkZ, final RegionFileIOThread.RegionFileType type, -+ final PrioritisedExecutor.Priority priority) { -+ super(scheduler, world, chunkX, chunkZ, type, priority); -+ } -+ -+ public void addCallback(final Consumer> consumer) { -+ if (!this.waiters.add(consumer)) { -+ try { -+ consumer.accept(this.result); -+ } catch (final Throwable throwable) { -+ this.scheduler.unrecoverableChunkSystemFailure(this.chunkX, this.chunkZ, Map.of( -+ "Consumer", ChunkTaskScheduler.stringIfNull(consumer), -+ "Completed throwable", ChunkTaskScheduler.stringIfNull(this.result.right()) -+ ), throwable); -+ if (throwable instanceof ThreadDeath) { -+ throw (ThreadDeath)throwable; -+ } -+ } -+ } -+ } -+ -+ @Override -+ protected void onComplete(final TaskResult result) { -+ if ((boolean)COMPLETED_HANDLE.getAndSet((CallbackDataLoadTask)this, (boolean)true)) { -+ throw new IllegalStateException("Already completed"); -+ } -+ this.result = result; -+ Consumer> consumer; -+ while ((consumer = this.waiters.pollOrBlockAdds()) != null) { -+ try { -+ consumer.accept(result); -+ } catch (final Throwable throwable) { -+ this.scheduler.unrecoverableChunkSystemFailure(this.chunkX, this.chunkZ, Map.of( -+ "Consumer", ChunkTaskScheduler.stringIfNull(consumer), -+ "Completed throwable", ChunkTaskScheduler.stringIfNull(result.right()) -+ ), throwable); -+ if (throwable instanceof ThreadDeath) { -+ throw (ThreadDeath)throwable; -+ } -+ return; -+ } -+ } -+ } -+ } -+ -+ public static final class ChunkDataLoadTask extends CallbackDataLoadTask { -+ protected ChunkDataLoadTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX, -+ final int chunkZ, final PrioritisedExecutor.Priority priority) { -+ super(scheduler, world, chunkX, chunkZ, RegionFileIOThread.RegionFileType.CHUNK_DATA, priority); -+ } -+ -+ @Override -+ protected boolean hasOffMain() { -+ return true; -+ } -+ -+ @Override -+ protected boolean hasOnMain() { -+ return false; -+ } -+ -+ @Override -+ protected PrioritisedExecutor.PrioritisedTask createOffMain(final Runnable run, final PrioritisedExecutor.Priority priority) { -+ return this.scheduler.loadExecutor.createTask(run, priority); -+ } -+ -+ @Override -+ protected PrioritisedExecutor.PrioritisedTask createOnMain(final Runnable run, final PrioritisedExecutor.Priority priority) { -+ throw new UnsupportedOperationException(); -+ } -+ -+ @Override -+ protected TaskResult completeOnMainOffMain(final ChunkAccess data, final Throwable throwable) { -+ throw new UnsupportedOperationException(); -+ } -+ -+ private ProtoChunk getEmptyChunk() { -+ return new ProtoChunk( -+ new ChunkPos(this.chunkX, this.chunkZ), UpgradeData.EMPTY, this.world, -+ this.world.registryAccess().registryOrThrow(Registries.BIOME), (BlendingData)null -+ ); -+ } -+ -+ @Override -+ protected TaskResult runOffMain(final CompoundTag data, final Throwable throwable) { -+ if (throwable != null) { -+ LOGGER.error("Failed to load chunk data for task: " + this.toString() + ", chunk data will be lost", throwable); -+ return new TaskResult<>(this.getEmptyChunk(), null); -+ } -+ -+ if (data == null) { -+ return new TaskResult<>(this.getEmptyChunk(), null); -+ } -+ -+ // need to convert data, and then deserialize it -+ -+ try { -+ final ChunkPos chunkPos = new ChunkPos(this.chunkX, this.chunkZ); -+ final ChunkMap chunkMap = this.world.getChunkSource().chunkMap; -+ // run converters -+ // note: upgradeChunkTag copies the data already -+ final CompoundTag converted = chunkMap.upgradeChunkTag( -+ this.world.getTypeKey(), chunkMap.overworldDataStorage, data, chunkMap.generator.getTypeNameForDataFixer(), -+ chunkPos, this.world -+ ); -+ // deserialize -+ final ChunkSerializer.InProgressChunkHolder chunkHolder = ChunkSerializer.readInProgressChunkHolder( -+ this.world, chunkMap.getPoiManager(), chunkPos, converted -+ ); -+ -+ return new TaskResult<>(chunkHolder.protoChunk, null); -+ } catch (final ThreadDeath death) { -+ throw death; -+ } catch (final Throwable thr2) { -+ LOGGER.error("Failed to parse chunk data for task: " + this.toString() + ", chunk data will be lost", thr2); -+ return new TaskResult<>(this.getEmptyChunk(), null); -+ } -+ } -+ -+ @Override -+ protected TaskResult runOnMain(final ChunkAccess data, final Throwable throwable) { -+ throw new UnsupportedOperationException(); -+ } -+ } -+ -+ public static final class PoiDataLoadTask extends CallbackDataLoadTask { -+ public PoiDataLoadTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX, -+ final int chunkZ, final PrioritisedExecutor.Priority priority) { -+ super(scheduler, world, chunkX, chunkZ, RegionFileIOThread.RegionFileType.POI_DATA, priority); -+ } -+ -+ @Override -+ protected boolean hasOffMain() { -+ return true; -+ } -+ -+ @Override -+ protected boolean hasOnMain() { -+ return false; -+ } -+ -+ @Override -+ protected PrioritisedExecutor.PrioritisedTask createOffMain(final Runnable run, final PrioritisedExecutor.Priority priority) { -+ return this.scheduler.loadExecutor.createTask(run, priority); -+ } -+ -+ @Override -+ protected PrioritisedExecutor.PrioritisedTask createOnMain(final Runnable run, final PrioritisedExecutor.Priority priority) { -+ throw new UnsupportedOperationException(); -+ } -+ -+ @Override -+ protected TaskResult completeOnMainOffMain(final PoiChunk data, final Throwable throwable) { -+ throw new UnsupportedOperationException(); -+ } -+ -+ @Override -+ protected TaskResult runOffMain(CompoundTag data, final Throwable throwable) { -+ if (throwable != null) { -+ LOGGER.error("Failed to load poi data for task: " + this.toString() + ", poi data will be lost", throwable); -+ return new TaskResult<>(PoiChunk.empty(this.world, this.chunkX, this.chunkZ), null); -+ } -+ -+ if (data == null || data.isEmpty()) { -+ // nothing to do -+ return new TaskResult<>(PoiChunk.empty(this.world, this.chunkX, this.chunkZ), null); -+ } -+ -+ try { -+ data = data.copy(); // coming from the I/O thread, so we need to copy -+ // run converters -+ final int dataVersion = !data.contains(SharedConstants.DATA_VERSION_TAG, net.minecraft.nbt.Tag.TAG_ANY_NUMERIC) ? 1945 : data.getInt(SharedConstants.DATA_VERSION_TAG); -+ final CompoundTag converted = MCDataConverter.convertTag( -+ MCTypeRegistry.POI_CHUNK, data, dataVersion, SharedConstants.getCurrentVersion().getDataVersion().getVersion() -+ ); -+ -+ // now we need to parse it -+ return new TaskResult<>(PoiChunk.parse(this.world, this.chunkX, this.chunkZ, converted), null); -+ } catch (final ThreadDeath death) { -+ throw death; -+ } catch (final Throwable thr2) { -+ LOGGER.error("Failed to run parse poi data for task: " + this.toString() + ", poi data will be lost", thr2); -+ return new TaskResult<>(PoiChunk.empty(this.world, this.chunkX, this.chunkZ), null); -+ } -+ } -+ -+ @Override -+ protected TaskResult runOnMain(final PoiChunk data, final Throwable throwable) { -+ throw new UnsupportedOperationException(); -+ } -+ } -+ -+ public static final class EntityDataLoadTask extends CallbackDataLoadTask { -+ -+ public EntityDataLoadTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX, -+ final int chunkZ, final PrioritisedExecutor.Priority priority) { -+ super(scheduler, world, chunkX, chunkZ, RegionFileIOThread.RegionFileType.ENTITY_DATA, priority); -+ } -+ -+ @Override -+ protected boolean hasOffMain() { -+ return true; -+ } -+ -+ @Override -+ protected boolean hasOnMain() { -+ return false; -+ } -+ -+ @Override -+ protected PrioritisedExecutor.PrioritisedTask createOffMain(final Runnable run, final PrioritisedExecutor.Priority priority) { -+ return this.scheduler.loadExecutor.createTask(run, priority); -+ } -+ -+ @Override -+ protected PrioritisedExecutor.PrioritisedTask createOnMain(final Runnable run, final PrioritisedExecutor.Priority priority) { -+ throw new UnsupportedOperationException(); -+ } -+ -+ @Override -+ protected TaskResult completeOnMainOffMain(final CompoundTag data, final Throwable throwable) { -+ throw new UnsupportedOperationException(); -+ } -+ -+ @Override -+ protected TaskResult runOffMain(final CompoundTag data, final Throwable throwable) { -+ if (throwable != null) { -+ LOGGER.error("Failed to load entity data for task: " + this.toString() + ", entity data will be lost", throwable); -+ return new TaskResult<>(null, null); -+ } -+ -+ if (data == null || data.isEmpty()) { -+ // nothing to do -+ return new TaskResult<>(null, null); -+ } -+ -+ try { -+ // note: data comes from the I/O thread, so we need to copy it -+ return new TaskResult<>(EntityStorage.upgradeChunkTag(data.copy()), null); -+ } catch (final ThreadDeath death) { -+ throw death; -+ } catch (final Throwable thr2) { -+ LOGGER.error("Failed to run converters for entity data for task: " + this.toString() + ", entity data will be lost", thr2); -+ return new TaskResult<>(null, thr2); -+ } -+ } -+ -+ @Override -+ protected TaskResult runOnMain(final CompoundTag data, final Throwable throwable) { -+ throw new UnsupportedOperationException(); -+ } -+ } -+} -diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkProgressionTask.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkProgressionTask.java -new file mode 100644 -index 0000000000000000000000000000000000000000..b2341328bb22f08836ef18785dc27393a36ce8d6 ---- /dev/null -+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkProgressionTask.java -@@ -0,0 +1,105 @@ -+package io.papermc.paper.chunk.system.scheduling; -+ -+import ca.spottedleaf.concurrentutil.collection.MultiThreadedQueue; -+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; -+import ca.spottedleaf.concurrentutil.util.ConcurrentUtil; -+import net.minecraft.server.level.ServerLevel; -+import net.minecraft.world.level.chunk.ChunkAccess; -+import net.minecraft.world.level.chunk.status.ChunkStatus; -+import java.lang.invoke.VarHandle; -+import java.util.Map; -+import java.util.function.BiConsumer; -+ -+public abstract class ChunkProgressionTask { -+ -+ private final MultiThreadedQueue> waiters = new MultiThreadedQueue<>(); -+ private ChunkAccess completedChunk; -+ private Throwable completedThrowable; -+ -+ protected final ChunkTaskScheduler scheduler; -+ protected final ServerLevel world; -+ protected final int chunkX; -+ protected final int chunkZ; -+ -+ protected volatile boolean completed; -+ protected static final VarHandle COMPLETED_HANDLE = ConcurrentUtil.getVarHandle(ChunkProgressionTask.class, "completed", boolean.class); -+ -+ protected ChunkProgressionTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX, final int chunkZ) { -+ this.scheduler = scheduler; -+ this.world = world; -+ this.chunkX = chunkX; -+ this.chunkZ = chunkZ; -+ } -+ -+ // Used only for debug json -+ public abstract boolean isScheduled(); -+ -+ // Note: It is the responsibility of the task to set the chunk's status once it has completed -+ public abstract ChunkStatus getTargetStatus(); -+ -+ /* Only executed once */ -+ /* Implementations must be prepared to handle cases where cancel() is called before schedule() */ -+ public abstract void schedule(); -+ -+ /* May be called multiple times */ -+ public abstract void cancel(); -+ -+ public abstract PrioritisedExecutor.Priority getPriority(); -+ -+ /* Schedule lock is always held for the priority update calls */ -+ -+ public abstract void lowerPriority(final PrioritisedExecutor.Priority priority); -+ -+ public abstract void setPriority(final PrioritisedExecutor.Priority priority); -+ -+ public abstract void raisePriority(final PrioritisedExecutor.Priority priority); -+ -+ public final void onComplete(final BiConsumer onComplete) { -+ if (!this.waiters.add(onComplete)) { -+ try { -+ onComplete.accept(this.completedChunk, this.completedThrowable); -+ } catch (final Throwable throwable) { -+ this.scheduler.unrecoverableChunkSystemFailure(this.chunkX, this.chunkZ, Map.of( -+ "Consumer", ChunkTaskScheduler.stringIfNull(onComplete), -+ "Completed throwable", ChunkTaskScheduler.stringIfNull(this.completedThrowable) -+ ), throwable); -+ if (throwable instanceof ThreadDeath) { -+ throw (ThreadDeath)throwable; -+ } -+ } -+ } -+ } -+ -+ protected final void complete(final ChunkAccess chunk, final Throwable throwable) { -+ try { -+ this.complete0(chunk, throwable); -+ } catch (final Throwable thr2) { -+ this.scheduler.unrecoverableChunkSystemFailure(this.chunkX, this.chunkZ, Map.of( -+ "Completed throwable", ChunkTaskScheduler.stringIfNull(throwable) -+ ), thr2); -+ if (thr2 instanceof ThreadDeath) { -+ throw (ThreadDeath)thr2; -+ } -+ } -+ } -+ -+ private void complete0(final ChunkAccess chunk, final Throwable throwable) { -+ if ((boolean)COMPLETED_HANDLE.getAndSet((ChunkProgressionTask)this, (boolean)true)) { -+ throw new IllegalStateException("Already completed"); -+ } -+ this.completedChunk = chunk; -+ this.completedThrowable = throwable; -+ -+ BiConsumer consumer; -+ while ((consumer = this.waiters.pollOrBlockAdds()) != null) { -+ consumer.accept(chunk, throwable); -+ } -+ } -+ -+ @Override -+ public String toString() { -+ return "ChunkProgressionTask{class: " + this.getClass().getName() + ", for world: " + this.world.getWorld().getName() + -+ ", chunk: (" + this.chunkX + "," + this.chunkZ + "), hashcode: " + System.identityHashCode(this) + ", priority: " + this.getPriority() + -+ ", status: " + this.getTargetStatus().toString() + ", scheduled: " + this.isScheduled() + "}"; -+ } -+} -diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkQueue.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkQueue.java -new file mode 100644 -index 0000000000000000000000000000000000000000..4cc1b3ba6d093a9683dbd8b7fe76106ae391e019 ---- /dev/null -+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkQueue.java -@@ -0,0 +1,160 @@ -+package io.papermc.paper.chunk.system.scheduling; -+ -+import it.unimi.dsi.fastutil.HashCommon; -+import it.unimi.dsi.fastutil.longs.LongLinkedOpenHashSet; -+import java.util.ArrayList; -+import java.util.List; -+import java.util.Map; -+import java.util.concurrent.ConcurrentHashMap; -+import java.util.concurrent.atomic.AtomicLong; -+ -+public final class ChunkQueue { -+ -+ public final int coordinateShift; -+ private final AtomicLong orderGenerator = new AtomicLong(); -+ private final ConcurrentHashMap unloadSections = new ConcurrentHashMap<>(); -+ -+ /* -+ * Note: write operations do not occur in parallel for any given section. -+ * Note: coordinateShift <= region shift in order for retrieveForCurrentRegion() to function correctly -+ */ -+ -+ public ChunkQueue(final int coordinateShift) { -+ this.coordinateShift = coordinateShift; -+ } -+ -+ public static record SectionToUnload(int sectionX, int sectionZ, Coordinate coord, long order, int count) {} -+ -+ public List retrieveForAllRegions() { -+ final List ret = new ArrayList<>(); -+ -+ for (final Map.Entry entry : this.unloadSections.entrySet()) { -+ final Coordinate coord = entry.getKey(); -+ final long key = coord.key; -+ final UnloadSection section = entry.getValue(); -+ final int sectionX = Coordinate.x(key); -+ final int sectionZ = Coordinate.z(key); -+ -+ ret.add(new SectionToUnload(sectionX, sectionZ, coord, section.order, section.chunks.size())); -+ } -+ -+ ret.sort((final SectionToUnload s1, final SectionToUnload s2) -> { -+ return Long.compare(s1.order, s2.order); -+ }); -+ -+ return ret; -+ } -+ -+ public UnloadSection getSectionUnsynchronized(final int sectionX, final int sectionZ) { -+ final Coordinate coordinate = new Coordinate(Coordinate.key(sectionX, sectionZ)); -+ return this.unloadSections.get(coordinate); -+ } -+ -+ public UnloadSection removeSection(final int sectionX, final int sectionZ) { -+ final Coordinate coordinate = new Coordinate(Coordinate.key(sectionX, sectionZ)); -+ return this.unloadSections.remove(coordinate); -+ } -+ -+ // write operation -+ public boolean addChunk(final int chunkX, final int chunkZ) { -+ final int shift = this.coordinateShift; -+ final int sectionX = chunkX >> shift; -+ final int sectionZ = chunkZ >> shift; -+ final Coordinate coordinate = new Coordinate(Coordinate.key(sectionX, sectionZ)); -+ final long chunkKey = Coordinate.key(chunkX, chunkZ); -+ -+ UnloadSection section = this.unloadSections.get(coordinate); -+ if (section == null) { -+ section = new UnloadSection(this.orderGenerator.getAndIncrement()); -+ // write operations do not occur in parallel for a given section -+ this.unloadSections.put(coordinate, section); -+ } -+ -+ return section.chunks.add(chunkKey); -+ } -+ -+ // write operation -+ public boolean removeChunk(final int chunkX, final int chunkZ) { -+ final int shift = this.coordinateShift; -+ final int sectionX = chunkX >> shift; -+ final int sectionZ = chunkZ >> shift; -+ final Coordinate coordinate = new Coordinate(Coordinate.key(sectionX, sectionZ)); -+ final long chunkKey = Coordinate.key(chunkX, chunkZ); -+ -+ final UnloadSection section = this.unloadSections.get(coordinate); -+ -+ if (section == null) { -+ return false; -+ } -+ -+ if (!section.chunks.remove(chunkKey)) { -+ return false; -+ } -+ -+ if (section.chunks.isEmpty()) { -+ this.unloadSections.remove(coordinate); -+ } -+ -+ return true; -+ } -+ -+ public static final class UnloadSection { -+ -+ public final long order; -+ public final LongLinkedOpenHashSet chunks = new LongLinkedOpenHashSet(); -+ -+ public UnloadSection(final long order) { -+ this.order = order; -+ } -+ } -+ -+ private static final class Coordinate implements Comparable { -+ -+ public final long key; -+ -+ public Coordinate(final long key) { -+ this.key = key; -+ } -+ -+ public Coordinate(final int x, final int z) { -+ this.key = key(x, z); -+ } -+ -+ public static long key(final int x, final int z) { -+ return ((long)z << 32) | (x & 0xFFFFFFFFL); -+ } -+ -+ public static int x(final long key) { -+ return (int)key; -+ } -+ -+ public static int z(final long key) { -+ return (int)(key >>> 32); -+ } -+ -+ @Override -+ public int hashCode() { -+ return (int)HashCommon.mix(this.key); -+ } -+ -+ @Override -+ public boolean equals(final Object obj) { -+ if (this == obj) { -+ return true; -+ } -+ -+ if (!(obj instanceof Coordinate other)) { -+ return false; -+ } -+ -+ return this.key == other.key; -+ } -+ -+ // This class is intended for HashMap/ConcurrentHashMap usage, which do treeify bin nodes if the chain -+ // is too large. So we should implement compareTo to help. -+ @Override -+ public int compareTo(final Coordinate other) { -+ return Long.compare(this.key, other.key); -+ } -+ } -+} -diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkTaskScheduler.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkTaskScheduler.java -new file mode 100644 -index 0000000000000000000000000000000000000000..049e20407033073b06fcdeb46c38485f4926d778 ---- /dev/null -+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkTaskScheduler.java -@@ -0,0 +1,883 @@ -+package io.papermc.paper.chunk.system.scheduling; -+ -+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; -+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedThreadPool; -+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedThreadedTaskQueue; -+import ca.spottedleaf.concurrentutil.lock.ReentrantAreaLock; -+import ca.spottedleaf.concurrentutil.util.ConcurrentUtil; -+import com.mojang.logging.LogUtils; -+import io.papermc.paper.chunk.system.io.RegionFileIOThread; -+import io.papermc.paper.chunk.system.scheduling.queue.RadiusAwarePrioritisedExecutor; -+import io.papermc.paper.configuration.GlobalConfiguration; -+import io.papermc.paper.util.CoordinateUtils; -+import io.papermc.paper.util.TickThread; -+import java.util.function.BooleanSupplier; -+import net.minecraft.CrashReport; -+import net.minecraft.CrashReportCategory; -+import net.minecraft.ReportedException; -+import io.papermc.paper.util.MCUtil; -+import net.minecraft.server.MinecraftServer; -+import net.minecraft.server.level.ChunkMap; -+import net.minecraft.server.level.FullChunkStatus; -+import net.minecraft.server.level.ServerLevel; -+import net.minecraft.server.level.TicketType; -+import net.minecraft.world.level.ChunkPos; -+import net.minecraft.world.level.chunk.ChunkAccess; -+import net.minecraft.world.level.chunk.status.ChunkStatus; -+import net.minecraft.world.level.chunk.LevelChunk; -+import org.bukkit.Bukkit; -+import org.slf4j.Logger; -+import java.io.File; -+import java.util.ArrayDeque; -+import java.util.ArrayList; -+import java.util.Arrays; -+import java.util.Collections; -+import java.util.List; -+import java.util.Map; -+import java.util.Objects; -+import java.util.concurrent.atomic.AtomicBoolean; -+import java.util.concurrent.atomic.AtomicLong; -+import java.util.function.Consumer; -+ -+public final class ChunkTaskScheduler { -+ -+ private static final Logger LOGGER = LogUtils.getClassLogger(); -+ -+ static int newChunkSystemIOThreads; -+ static int newChunkSystemWorkerThreads; -+ static int newChunkSystemGenParallelism; -+ static int newChunkSystemLoadParallelism; -+ -+ public static ca.spottedleaf.concurrentutil.executor.standard.PrioritisedThreadPool workerThreads; -+ -+ private static boolean initialised = false; -+ -+ public static void init(final GlobalConfiguration.ChunkSystem config) { -+ if (initialised) { -+ return; -+ } -+ initialised = true; -+ newChunkSystemIOThreads = config.ioThreads; -+ newChunkSystemWorkerThreads = config.workerThreads; -+ if (newChunkSystemIOThreads < 0) { -+ newChunkSystemIOThreads = 1; -+ } else { -+ newChunkSystemIOThreads = Math.max(1, newChunkSystemIOThreads); -+ } -+ int defaultWorkerThreads = Runtime.getRuntime().availableProcessors() / 2; -+ if (defaultWorkerThreads <= 4) { -+ defaultWorkerThreads = defaultWorkerThreads <= 3 ? 1 : 2; -+ } else { -+ defaultWorkerThreads = defaultWorkerThreads / 2; -+ } -+ defaultWorkerThreads = Integer.getInteger("Paper.WorkerThreadCount", Integer.valueOf(defaultWorkerThreads)); -+ -+ if (newChunkSystemWorkerThreads < 0) { -+ newChunkSystemWorkerThreads = defaultWorkerThreads; -+ } else { -+ newChunkSystemWorkerThreads = Math.max(1, newChunkSystemWorkerThreads); -+ } -+ -+ String newChunkSystemGenParallelism = config.genParallelism; -+ if (newChunkSystemGenParallelism.equalsIgnoreCase("default")) { -+ newChunkSystemGenParallelism = "true"; -+ } -+ boolean useParallelGen; -+ if (newChunkSystemGenParallelism.equalsIgnoreCase("on") || newChunkSystemGenParallelism.equalsIgnoreCase("enabled") -+ || newChunkSystemGenParallelism.equalsIgnoreCase("true")) { -+ useParallelGen = true; -+ } else if (newChunkSystemGenParallelism.equalsIgnoreCase("off") || newChunkSystemGenParallelism.equalsIgnoreCase("disabled") -+ || newChunkSystemGenParallelism.equalsIgnoreCase("false")) { -+ useParallelGen = false; -+ } else { -+ throw new IllegalStateException("Invalid option for gen-parallelism: must be one of [on, off, enabled, disabled, true, false, default]"); -+ } -+ -+ ChunkTaskScheduler.newChunkSystemGenParallelism = useParallelGen ? newChunkSystemWorkerThreads : 1; -+ ChunkTaskScheduler.newChunkSystemLoadParallelism = newChunkSystemWorkerThreads; -+ -+ RegionFileIOThread.init(newChunkSystemIOThreads); -+ workerThreads = new ca.spottedleaf.concurrentutil.executor.standard.PrioritisedThreadPool( -+ "Paper Chunk System Worker Pool", newChunkSystemWorkerThreads, -+ (final Thread thread, final Integer id) -> { -+ thread.setPriority(Thread.NORM_PRIORITY - 2); -+ thread.setName("Tuinity Chunk System Worker #" + id.intValue()); -+ thread.setUncaughtExceptionHandler(io.papermc.paper.chunk.system.scheduling.NewChunkHolder.CHUNKSYSTEM_UNCAUGHT_EXCEPTION_HANDLER); -+ }, (long)(20.0e6)); // 20ms -+ -+ LOGGER.info("Chunk system is using " + newChunkSystemIOThreads + " I/O threads, " + newChunkSystemWorkerThreads + " worker threads, and gen parallelism of " + ChunkTaskScheduler.newChunkSystemGenParallelism + " threads"); -+ } -+ -+ public final ServerLevel world; -+ public final PrioritisedThreadPool workers; -+ public final RadiusAwarePrioritisedExecutor radiusAwareScheduler; -+ public final PrioritisedThreadPool.PrioritisedPoolExecutor parallelGenExecutor; -+ private final PrioritisedThreadPool.PrioritisedPoolExecutor radiusAwareGenExecutor; -+ public final PrioritisedThreadPool.PrioritisedPoolExecutor loadExecutor; -+ -+ private final PrioritisedThreadedTaskQueue mainThreadExecutor = new PrioritisedThreadedTaskQueue(); -+ -+ public final ChunkHolderManager chunkHolderManager; -+ -+ static { -+ ChunkStatus.EMPTY.writeRadius = 0; -+ ChunkStatus.STRUCTURE_STARTS.writeRadius = 0; -+ ChunkStatus.STRUCTURE_REFERENCES.writeRadius = 0; -+ ChunkStatus.BIOMES.writeRadius = 0; -+ ChunkStatus.NOISE.writeRadius = 0; -+ ChunkStatus.SURFACE.writeRadius = 0; -+ ChunkStatus.CARVERS.writeRadius = 0; -+ ChunkStatus.FEATURES.writeRadius = 1; -+ ChunkStatus.INITIALIZE_LIGHT.writeRadius = 0; -+ ChunkStatus.LIGHT.writeRadius = 2; -+ ChunkStatus.SPAWN.writeRadius = 0; -+ ChunkStatus.FULL.writeRadius = 0; -+ -+ /* -+ It's important that the neighbour read radius is taken into account. If _any_ later status is using some chunk as -+ a neighbour, it must be also safe if that neighbour is being generated. i.e for any status later than FEATURES, -+ for a status to be parallel safe it must not read the block data from its neighbours. -+ */ -+ final List parallelCapableStatus = Arrays.asList( -+ // No-op executor. -+ ChunkStatus.EMPTY, -+ -+ // This is parallel capable, as CB has fixed the concurrency issue with stronghold generations. -+ // Does not touch neighbour chunks. -+ ChunkStatus.STRUCTURE_STARTS, -+ -+ // Surprisingly this is parallel capable. It is simply reading the already-created structure starts -+ // into the structure references for the chunk. So while it reads from it neighbours, its neighbours -+ // will not change, even if executed in parallel. -+ ChunkStatus.STRUCTURE_REFERENCES, -+ -+ // Safe. Mojang runs it in parallel as well. -+ ChunkStatus.BIOMES, -+ -+ // Safe. Mojang runs it in parallel as well. -+ ChunkStatus.NOISE, -+ -+ // Parallel safe. Only touches the target chunk. Biome retrieval is now noise based, which is -+ // completely thread-safe. -+ ChunkStatus.SURFACE, -+ -+ // No global state is modified in the carvers. It only touches the specified chunk. So it is parallel safe. -+ ChunkStatus.CARVERS, -+ -+ // FEATURES is not parallel safe. It writes to neighbours. -+ -+ // no-op executor -+ ChunkStatus.INITIALIZE_LIGHT -+ -+ // LIGHT is not parallel safe. It also doesn't run on the generation executor, so no point. -+ -+ // Only writes to the specified chunk. State is not read by later statuses. Parallel safe. -+ // Note: it may look unsafe because it writes to a worldgenregion, but the region size is always 0 - -+ // see the task margin. -+ // However, if the neighbouring FEATURES chunk is unloaded, but then fails to load in again (for whatever -+ // reason), then it would write to this chunk - and since this status reads blocks from itself, it's not -+ // safe to execute this in parallel. -+ // SPAWN -+ -+ // FULL is executed on main. -+ ); -+ -+ for (final ChunkStatus status : parallelCapableStatus) { -+ status.isParallelCapable = true; -+ } -+ } -+ -+ private static final int[] ACCESS_RADIUS_TABLE = new int[ChunkStatus.getStatusList().size()]; -+ private static final int[] MAX_ACCESS_RADIUS_TABLE = new int[ACCESS_RADIUS_TABLE.length]; -+ static { -+ Arrays.fill(ACCESS_RADIUS_TABLE, -1); -+ } -+ -+ private static int getAccessRadius0(final ChunkStatus genStatus) { -+ if (genStatus == ChunkStatus.EMPTY) { -+ return 0; -+ } -+ -+ final int radius = Math.max(genStatus.loadRange, genStatus.getRange()); -+ int maxRange = radius; -+ -+ for (int dist = 1; dist <= radius; ++dist) { -+ final ChunkStatus requiredNeighbourStatus = ChunkMap.getDependencyStatus(genStatus, radius); -+ final int rad = ACCESS_RADIUS_TABLE[requiredNeighbourStatus.getIndex()]; -+ if (rad == -1) { -+ throw new IllegalStateException(); -+ } -+ -+ maxRange = Math.max(maxRange, dist + rad); -+ } -+ -+ return maxRange; -+ } -+ -+ private static int maxAccessRadius; -+ -+ static { -+ final List statuses = ChunkStatus.getStatusList(); -+ for (int i = 0, len = statuses.size(); i < len; ++i) { -+ ACCESS_RADIUS_TABLE[i] = getAccessRadius0(statuses.get(i)); -+ } -+ int max = 0; -+ for (int i = 0, len = statuses.size(); i < len; ++i) { -+ MAX_ACCESS_RADIUS_TABLE[i] = max = Math.max(ACCESS_RADIUS_TABLE[i], max); -+ } -+ maxAccessRadius = max; -+ } -+ -+ public static int getMaxAccessRadius() { -+ return maxAccessRadius; -+ } -+ -+ public static int getAccessRadius(final ChunkStatus genStatus) { -+ return ACCESS_RADIUS_TABLE[genStatus.getIndex()]; -+ } -+ -+ public static int getAccessRadius(final FullChunkStatus status) { -+ return (status.ordinal() - 1) + getAccessRadius(ChunkStatus.FULL); -+ } -+ -+ final ReentrantAreaLock schedulingLockArea; -+ private final int lockShift; -+ -+ public final int getChunkSystemLockShift() { -+ return this.lockShift; -+ } -+ // Folia end - use area based lock to reduce contention -+ -+ public ChunkTaskScheduler(final ServerLevel world, final PrioritisedThreadPool workers) { -+ this.world = world; -+ this.workers = workers; -+ // must be >= region shift (in paper, doesn't exist) and must be >= ticket propagator section shift -+ // it must be >= region shift since the regioniser assumes ticket updates do not occur in parallel for the region sections -+ // it must be >= ticket propagator section shift so that the ticket propagator can assume that owning a position implies owning -+ // the entire section -+ // we just take the max, as we want the smallest shift that satisfies these properties -+ this.lockShift = Math.max(world.getRegionChunkShift(), ThreadedTicketLevelPropagator.SECTION_SHIFT); -+ this.schedulingLockArea = new ReentrantAreaLock(this.getChunkSystemLockShift()); -+ -+ final String worldName = world.getWorld().getName(); -+ this.parallelGenExecutor = workers.createExecutor("Chunk parallel generation executor for world '" + worldName + "'", Math.max(1, newChunkSystemGenParallelism)); -+ this.radiusAwareGenExecutor = -+ newChunkSystemGenParallelism <= 1 ? this.parallelGenExecutor : workers.createExecutor("Chunk radius aware generator for world '" + worldName + "'", newChunkSystemGenParallelism); -+ this.loadExecutor = workers.createExecutor("Chunk load executor for world '" + worldName + "'", newChunkSystemLoadParallelism); -+ this.radiusAwareScheduler = new RadiusAwarePrioritisedExecutor(this.radiusAwareGenExecutor, Math.max(1, newChunkSystemGenParallelism)); -+ this.chunkHolderManager = new ChunkHolderManager(world, this); -+ } -+ -+ private final AtomicBoolean failedChunkSystem = new AtomicBoolean(); -+ -+ public static Object stringIfNull(final Object obj) { -+ return obj == null ? "null" : obj; -+ } -+ -+ public void unrecoverableChunkSystemFailure(final int chunkX, final int chunkZ, final Map objectsOfInterest, final Throwable thr) { -+ final NewChunkHolder holder = this.chunkHolderManager.getChunkHolder(chunkX, chunkZ); -+ LOGGER.error("Chunk system error at chunk (" + chunkX + "," + chunkZ + "), holder: " + holder + ", exception:", new Throwable(thr)); -+ -+ if (this.failedChunkSystem.getAndSet(true)) { -+ return; -+ } -+ -+ final ReportedException reportedException = thr instanceof ReportedException ? (ReportedException)thr : new ReportedException(new CrashReport("Chunk system error", thr)); -+ -+ CrashReportCategory crashReportCategory = reportedException.getReport().addCategory("Chunk system details"); -+ crashReportCategory.setDetail("Chunk coordinate", new ChunkPos(chunkX, chunkZ).toString()); -+ crashReportCategory.setDetail("ChunkHolder", Objects.toString(holder)); -+ crashReportCategory.setDetail("unrecoverableChunkSystemFailure caller thread", Thread.currentThread().getName()); -+ -+ crashReportCategory = reportedException.getReport().addCategory("Chunk System Objects of Interest"); -+ for (final Map.Entry entry : objectsOfInterest.entrySet()) { -+ if (entry.getValue() instanceof Throwable thrObject) { -+ crashReportCategory.setDetailError(Objects.toString(entry.getKey()), thrObject); -+ } else { -+ crashReportCategory.setDetail(Objects.toString(entry.getKey()), Objects.toString(entry.getValue())); -+ } -+ } -+ -+ final Runnable crash = () -> { -+ throw new RuntimeException("Chunk system crash propagated from unrecoverableChunkSystemFailure", reportedException); -+ }; -+ -+ // this may not be good enough, specifically thanks to stupid ass plugins swallowing exceptions -+ this.scheduleChunkTask(chunkX, chunkZ, crash, PrioritisedExecutor.Priority.BLOCKING); -+ // so, make the main thread pick it up -+ MinecraftServer.chunkSystemCrash = new RuntimeException("Chunk system crash propagated from unrecoverableChunkSystemFailure", reportedException); -+ } -+ -+ public boolean executeMainThreadTask() { -+ TickThread.ensureTickThread("Cannot execute main thread task off-main"); -+ return this.mainThreadExecutor.executeTask(); -+ } -+ -+ public void raisePriority(final int x, final int z, final PrioritisedExecutor.Priority priority) { -+ this.chunkHolderManager.raisePriority(x, z, priority); -+ } -+ -+ public void setPriority(final int x, final int z, final PrioritisedExecutor.Priority priority) { -+ this.chunkHolderManager.setPriority(x, z, priority); -+ } -+ -+ public void lowerPriority(final int x, final int z, final PrioritisedExecutor.Priority priority) { -+ this.chunkHolderManager.lowerPriority(x, z, priority); -+ } -+ -+ private final AtomicLong chunkLoadCounter = new AtomicLong(); -+ -+ public void scheduleTickingState(final int chunkX, final int chunkZ, final FullChunkStatus toStatus, -+ final boolean addTicket, final PrioritisedExecutor.Priority priority, -+ final Consumer onComplete) { -+ if (!TickThread.isTickThread()) { -+ this.scheduleChunkTask(chunkX, chunkZ, () -> { -+ ChunkTaskScheduler.this.scheduleTickingState(chunkX, chunkZ, toStatus, addTicket, priority, onComplete); -+ }, priority); -+ return; -+ } -+ final int accessRadius = getAccessRadius(toStatus); -+ if (this.chunkHolderManager.ticketLockArea.isHeldByCurrentThread(chunkX, chunkZ, accessRadius)) { -+ throw new IllegalStateException("Cannot schedule chunk load during ticket level update"); -+ } -+ if (this.schedulingLockArea.isHeldByCurrentThread(chunkX, chunkZ, accessRadius)) { -+ throw new IllegalStateException("Cannot schedule chunk loading recursively"); -+ } -+ -+ if (toStatus == FullChunkStatus.INACCESSIBLE) { -+ throw new IllegalArgumentException("Cannot wait for INACCESSIBLE status"); -+ } -+ -+ final int minLevel = 33 - (toStatus.ordinal() - 1); -+ final Long chunkReference = addTicket ? Long.valueOf(this.chunkLoadCounter.getAndIncrement()) : null; -+ final long chunkKey = CoordinateUtils.getChunkKey(chunkX, chunkZ); -+ -+ if (addTicket) { -+ this.chunkHolderManager.addTicketAtLevel(TicketType.CHUNK_LOAD, chunkKey, minLevel, chunkReference); -+ this.chunkHolderManager.processTicketUpdates(); -+ } -+ -+ final Consumer loadCallback = (final LevelChunk chunk) -> { -+ try { -+ if (onComplete != null) { -+ onComplete.accept(chunk); -+ } -+ } finally { -+ if (addTicket) { -+ ChunkTaskScheduler.this.chunkHolderManager.addAndRemoveTickets(chunkKey, -+ TicketType.UNKNOWN, minLevel, new ChunkPos(chunkKey), -+ TicketType.CHUNK_LOAD, minLevel, chunkReference -+ ); -+ } -+ } -+ }; -+ -+ final boolean scheduled; -+ final LevelChunk chunk; -+ final ReentrantAreaLock.Node ticketLock = this.chunkHolderManager.ticketLockArea.lock(chunkX, chunkZ, accessRadius); -+ try { -+ final ReentrantAreaLock.Node schedulingLock = this.schedulingLockArea.lock(chunkX, chunkZ, accessRadius); -+ try { -+ final NewChunkHolder chunkHolder = this.chunkHolderManager.getChunkHolder(chunkKey); -+ if (chunkHolder == null || chunkHolder.getTicketLevel() > minLevel) { -+ scheduled = false; -+ chunk = null; -+ } else { -+ final FullChunkStatus currStatus = chunkHolder.getChunkStatus(); -+ if (currStatus.isOrAfter(toStatus)) { -+ scheduled = false; -+ chunk = (LevelChunk)chunkHolder.getCurrentChunk(); -+ } else { -+ scheduled = true; -+ chunk = null; -+ -+ final int radius = toStatus.ordinal() - 1; // 0 -> BORDER, 1 -> TICKING, 2 -> ENTITY_TICKING -+ for (int dz = -radius; dz <= radius; ++dz) { -+ for (int dx = -radius; dx <= radius; ++dx) { -+ final NewChunkHolder neighbour = -+ (dx | dz) == 0 ? chunkHolder : this.chunkHolderManager.getChunkHolder(dx + chunkX, dz + chunkZ); -+ if (neighbour != null) { -+ neighbour.raisePriority(priority); -+ } -+ } -+ } -+ -+ // ticket level should schedule for us -+ chunkHolder.addFullStatusConsumer(toStatus, loadCallback); -+ } -+ } -+ } finally { -+ this.schedulingLockArea.unlock(schedulingLock); -+ } -+ } finally { -+ this.chunkHolderManager.ticketLockArea.unlock(ticketLock); -+ } -+ -+ if (!scheduled) { -+ // couldn't schedule -+ try { -+ loadCallback.accept(chunk); -+ } catch (final ThreadDeath thr) { -+ throw thr; -+ } catch (final Throwable thr) { -+ LOGGER.error("Failed to process chunk full status callback", thr); -+ } -+ } -+ } -+ -+ public void scheduleChunkLoad(final int chunkX, final int chunkZ, final boolean gen, final ChunkStatus toStatus, final boolean addTicket, -+ final PrioritisedExecutor.Priority priority, final Consumer onComplete) { -+ if (gen) { -+ this.scheduleChunkLoad(chunkX, chunkZ, toStatus, addTicket, priority, onComplete); -+ return; -+ } -+ this.scheduleChunkLoad(chunkX, chunkZ, ChunkStatus.EMPTY, addTicket, priority, (final ChunkAccess chunk) -> { -+ if (chunk == null) { -+ onComplete.accept(null); -+ } else { -+ if (chunk.getStatus().isOrAfter(toStatus)) { -+ this.scheduleChunkLoad(chunkX, chunkZ, toStatus, addTicket, priority, onComplete); -+ } else { -+ onComplete.accept(null); -+ } -+ } -+ }); -+ } -+ -+ // only appropriate to use with ServerLevel#syncLoadNonFull -+ public boolean beginChunkLoadForNonFullSync(final int chunkX, final int chunkZ, final ChunkStatus toStatus, -+ final PrioritisedExecutor.Priority priority) { -+ final int accessRadius = getAccessRadius(toStatus); -+ final long chunkKey = CoordinateUtils.getChunkKey(chunkX, chunkZ); -+ final int minLevel = 33 + ChunkStatus.getDistance(toStatus); -+ final List tasks = new ArrayList<>(); -+ final ca.spottedleaf.concurrentutil.lock.ReentrantAreaLock.Node ticketLock = this.chunkHolderManager.ticketLockArea.lock(chunkX, chunkZ, accessRadius); // Folia - use area based lock to reduce contention -+ try { -+ final ca.spottedleaf.concurrentutil.lock.ReentrantAreaLock.Node schedulingLock = this.schedulingLockArea.lock(chunkX, chunkZ, accessRadius); // Folia - use area based lock to reduce contention -+ try { -+ final NewChunkHolder chunkHolder = this.chunkHolderManager.getChunkHolder(chunkKey); -+ if (chunkHolder == null || chunkHolder.getTicketLevel() > minLevel) { -+ return false; -+ } else { -+ final ChunkStatus genStatus = chunkHolder.getCurrentGenStatus(); -+ if (genStatus != null && genStatus.isOrAfter(toStatus)) { -+ return true; -+ } else { -+ chunkHolder.raisePriority(priority); -+ -+ if (!chunkHolder.upgradeGenTarget(toStatus)) { -+ this.schedule(chunkX, chunkZ, toStatus, chunkHolder, tasks); -+ } -+ } -+ } -+ } finally { -+ this.schedulingLockArea.unlock(schedulingLock); -+ } -+ } finally { -+ this.chunkHolderManager.ticketLockArea.unlock(ticketLock); -+ } -+ -+ for (int i = 0, len = tasks.size(); i < len; ++i) { -+ tasks.get(i).schedule(); -+ } -+ -+ return true; -+ } -+ -+ public void scheduleChunkLoad(final int chunkX, final int chunkZ, final ChunkStatus toStatus, final boolean addTicket, -+ final PrioritisedExecutor.Priority priority, final Consumer onComplete) { -+ if (!TickThread.isTickThread()) { -+ this.scheduleChunkTask(chunkX, chunkZ, () -> { -+ ChunkTaskScheduler.this.scheduleChunkLoad(chunkX, chunkZ, toStatus, addTicket, priority, onComplete); -+ }, priority); -+ return; -+ } -+ final int accessRadius = getAccessRadius(toStatus); -+ if (this.chunkHolderManager.ticketLockArea.isHeldByCurrentThread(chunkX, chunkZ, accessRadius)) { -+ throw new IllegalStateException("Cannot schedule chunk load during ticket level update"); -+ } -+ if (this.schedulingLockArea.isHeldByCurrentThread(chunkX, chunkZ, accessRadius)) { -+ throw new IllegalStateException("Cannot schedule chunk loading recursively"); -+ } -+ -+ if (toStatus == ChunkStatus.FULL) { -+ this.scheduleTickingState(chunkX, chunkZ, FullChunkStatus.FULL, addTicket, priority, (Consumer)onComplete); -+ return; -+ } -+ -+ final int minLevel = 33 + ChunkStatus.getDistance(toStatus); -+ final Long chunkReference = addTicket ? Long.valueOf(this.chunkLoadCounter.getAndIncrement()) : null; -+ final long chunkKey = CoordinateUtils.getChunkKey(chunkX, chunkZ); -+ -+ if (addTicket) { -+ this.chunkHolderManager.addTicketAtLevel(TicketType.CHUNK_LOAD, chunkKey, minLevel, chunkReference); -+ this.chunkHolderManager.processTicketUpdates(); -+ } -+ -+ final Consumer loadCallback = (final ChunkAccess chunk) -> { -+ try { -+ if (onComplete != null) { -+ onComplete.accept(chunk); -+ } -+ } finally { -+ if (addTicket) { -+ ChunkTaskScheduler.this.chunkHolderManager.addAndRemoveTickets(chunkKey, -+ TicketType.UNKNOWN, minLevel, new ChunkPos(chunkKey), -+ TicketType.CHUNK_LOAD, minLevel, chunkReference -+ ); -+ } -+ } -+ }; -+ -+ final List tasks = new ArrayList<>(); -+ -+ final boolean scheduled; -+ final ChunkAccess chunk; -+ final ReentrantAreaLock.Node ticketLock = this.chunkHolderManager.ticketLockArea.lock(chunkX, chunkZ, accessRadius); -+ try { -+ final ReentrantAreaLock.Node schedulingLock = this.schedulingLockArea.lock(chunkX, chunkZ, accessRadius); -+ try { -+ final NewChunkHolder chunkHolder = this.chunkHolderManager.getChunkHolder(chunkKey); -+ if (chunkHolder == null || chunkHolder.getTicketLevel() > minLevel) { -+ scheduled = false; -+ chunk = null; -+ } else { -+ final ChunkStatus genStatus = chunkHolder.getCurrentGenStatus(); -+ if (genStatus != null && genStatus.isOrAfter(toStatus)) { -+ scheduled = false; -+ chunk = chunkHolder.getCurrentChunk(); -+ } else { -+ scheduled = true; -+ chunk = null; -+ chunkHolder.raisePriority(priority); -+ -+ if (!chunkHolder.upgradeGenTarget(toStatus)) { -+ this.schedule(chunkX, chunkZ, toStatus, chunkHolder, tasks); -+ } -+ chunkHolder.addStatusConsumer(toStatus, loadCallback); -+ } -+ } -+ } finally { -+ this.schedulingLockArea.unlock(schedulingLock); -+ } -+ } finally { -+ this.chunkHolderManager.ticketLockArea.unlock(ticketLock); -+ } -+ -+ for (int i = 0, len = tasks.size(); i < len; ++i) { -+ tasks.get(i).schedule(); -+ } -+ -+ if (!scheduled) { -+ // couldn't schedule -+ try { -+ loadCallback.accept(chunk); -+ } catch (final ThreadDeath thr) { -+ throw thr; -+ } catch (final Throwable thr) { -+ LOGGER.error("Failed to process chunk status callback", thr); -+ } -+ } -+ } -+ -+ private ChunkProgressionTask createTask(final int chunkX, final int chunkZ, final ChunkAccess chunk, -+ final NewChunkHolder chunkHolder, final List neighbours, -+ final ChunkStatus toStatus, final PrioritisedExecutor.Priority initialPriority) { -+ if (toStatus == ChunkStatus.EMPTY) { -+ return new ChunkLoadTask(this, this.world, chunkX, chunkZ, chunkHolder, initialPriority); -+ } -+ if (toStatus == ChunkStatus.LIGHT) { -+ return new ChunkLightTask(this, this.world, chunkX, chunkZ, chunk, initialPriority); -+ } -+ if (toStatus == ChunkStatus.FULL) { -+ return new ChunkFullTask(this, this.world, chunkX, chunkZ, chunkHolder, chunk, initialPriority); -+ } -+ -+ return new ChunkUpgradeGenericStatusTask(this, this.world, chunkX, chunkZ, chunk, neighbours, toStatus, initialPriority); -+ } -+ -+ ChunkProgressionTask schedule(final int chunkX, final int chunkZ, final ChunkStatus targetStatus, final NewChunkHolder chunkHolder, -+ final List allTasks) { -+ return this.schedule(chunkX, chunkZ, targetStatus, chunkHolder, allTasks, chunkHolder.getEffectivePriority()); -+ } -+ -+ // rets new task scheduled for the _specified_ chunk -+ // note: this must hold the scheduling lock -+ // minPriority is only used to pass the priority through to neighbours, as priority calculation has not yet been done -+ // schedule will ignore the generation target, so it should be checked by the caller to ensure the target is not regressed! -+ private ChunkProgressionTask schedule(final int chunkX, final int chunkZ, final ChunkStatus targetStatus, -+ final NewChunkHolder chunkHolder, final List allTasks, -+ final PrioritisedExecutor.Priority minPriority) { -+ if (!this.schedulingLockArea.isHeldByCurrentThread(chunkX, chunkZ, getAccessRadius(targetStatus))) { -+ throw new IllegalStateException("Not holding scheduling lock"); -+ } -+ -+ if (chunkHolder.hasGenerationTask()) { -+ chunkHolder.upgradeGenTarget(targetStatus); -+ return null; -+ } -+ -+ final PrioritisedExecutor.Priority requestedPriority = PrioritisedExecutor.Priority.max(minPriority, chunkHolder.getEffectivePriority()); -+ final ChunkStatus currentGenStatus = chunkHolder.getCurrentGenStatus(); -+ final ChunkAccess chunk = chunkHolder.getCurrentChunk(); -+ -+ if (currentGenStatus == null) { -+ // not yet loaded -+ final ChunkProgressionTask task = this.createTask( -+ chunkX, chunkZ, chunk, chunkHolder, Collections.emptyList(), ChunkStatus.EMPTY, requestedPriority -+ ); -+ -+ allTasks.add(task); -+ -+ final List chunkHolderNeighbours = new ArrayList<>(1); -+ chunkHolderNeighbours.add(chunkHolder); -+ -+ chunkHolder.setGenerationTarget(targetStatus); -+ chunkHolder.setGenerationTask(task, ChunkStatus.EMPTY, chunkHolderNeighbours); -+ -+ return task; -+ } -+ -+ if (currentGenStatus.isOrAfter(targetStatus)) { -+ // nothing to do -+ return null; -+ } -+ -+ // we know for sure now that we want to schedule _something_, so set the target -+ chunkHolder.setGenerationTarget(targetStatus); -+ -+ final ChunkStatus chunkRealStatus = chunk.getStatus(); -+ final ChunkStatus toStatus = currentGenStatus.getNextStatus(); -+ -+ // if this chunk has already generated up to or past the specified status, then we don't -+ // need the neighbours AT ALL. -+ final int neighbourReadRadius = chunkRealStatus.isOrAfter(toStatus) ? toStatus.loadRange : toStatus.getRange(); -+ -+ boolean unGeneratedNeighbours = false; -+ -+ // copied from MCUtil.getSpiralOutChunks -+ for (int r = 1; r <= neighbourReadRadius; r++) { -+ int x = -r; -+ int z = r; -+ -+ // Iterates the edge of half of the box; then negates for other half. -+ while (x <= r && z > -r) { -+ final int radius = Math.max(Math.abs(x), Math.abs(z)); -+ final ChunkStatus requiredNeighbourStatus = ChunkMap.getDependencyStatus(toStatus, radius); -+ -+ unGeneratedNeighbours |= this.checkNeighbour( -+ chunkX + x, chunkZ + z, requiredNeighbourStatus, chunkHolder, allTasks, requestedPriority -+ ); -+ unGeneratedNeighbours |= this.checkNeighbour( -+ chunkX - x, chunkZ - z, requiredNeighbourStatus, chunkHolder, allTasks, requestedPriority -+ ); -+ -+ if (x < r) { -+ x++; -+ } else { -+ z--; -+ } -+ } -+ } -+ -+ if (unGeneratedNeighbours) { -+ // can't schedule, but neighbour completion will schedule for us when they're ALL done -+ -+ // propagate our priority to neighbours -+ chunkHolder.recalculateNeighbourPriorities(); -+ return null; -+ } -+ -+ // need to gather neighbours -+ -+ final List neighbours; -+ final List chunkHolderNeighbours; -+ if (neighbourReadRadius <= 0) { -+ neighbours = new ArrayList<>(1); -+ chunkHolderNeighbours = new ArrayList<>(1); -+ neighbours.add(chunk); -+ chunkHolderNeighbours.add(chunkHolder); -+ } else { -+ // the iteration order is _very_ important, as all generation statuses expect a certain order such that: -+ // chunkAtRelative = neighbours.get(relX + relZ * (2 * radius + 1)) -+ neighbours = new ArrayList<>((2 * neighbourReadRadius + 1) * (2 * neighbourReadRadius + 1)); -+ chunkHolderNeighbours = new ArrayList<>((2 * neighbourReadRadius + 1) * (2 * neighbourReadRadius + 1)); -+ for (int dz = -neighbourReadRadius; dz <= neighbourReadRadius; ++dz) { -+ for (int dx = -neighbourReadRadius; dx <= neighbourReadRadius; ++dx) { -+ final NewChunkHolder holder = (dx | dz) == 0 ? chunkHolder : this.chunkHolderManager.getChunkHolder(dx + chunkX, dz + chunkZ); -+ neighbours.add(holder.getChunkForNeighbourAccess()); -+ chunkHolderNeighbours.add(holder); -+ } -+ } -+ } -+ -+ final ChunkProgressionTask task = this.createTask(chunkX, chunkZ, chunk, chunkHolder, neighbours, toStatus, chunkHolder.getEffectivePriority()); -+ allTasks.add(task); -+ -+ chunkHolder.setGenerationTask(task, toStatus, chunkHolderNeighbours); -+ -+ return task; -+ } -+ -+ // rets true if the neighbour is not at the required status, false otherwise -+ private boolean checkNeighbour(final int chunkX, final int chunkZ, final ChunkStatus requiredStatus, final NewChunkHolder center, -+ final List tasks, final PrioritisedExecutor.Priority minPriority) { -+ final NewChunkHolder chunkHolder = this.chunkHolderManager.getChunkHolder(chunkX, chunkZ); -+ -+ if (chunkHolder == null) { -+ throw new IllegalStateException("Missing chunkholder when required"); -+ } -+ -+ final ChunkStatus holderStatus = chunkHolder.getCurrentGenStatus(); -+ if (holderStatus != null && holderStatus.isOrAfter(requiredStatus)) { -+ return false; -+ } -+ -+ if (chunkHolder.hasFailedGeneration()) { -+ return true; -+ } -+ -+ center.addGenerationBlockingNeighbour(chunkHolder); -+ chunkHolder.addWaitingNeighbour(center, requiredStatus); -+ -+ if (chunkHolder.upgradeGenTarget(requiredStatus)) { -+ return true; -+ } -+ -+ // not at status required, so we need to schedule its generation -+ this.schedule( -+ chunkX, chunkZ, requiredStatus, chunkHolder, tasks, minPriority -+ ); -+ -+ return true; -+ } -+ -+ /** -+ * @deprecated Chunk tasks must be tied to coordinates in the future -+ */ -+ @Deprecated -+ public PrioritisedExecutor.PrioritisedTask scheduleChunkTask(final Runnable run) { -+ return this.scheduleChunkTask(run, PrioritisedExecutor.Priority.NORMAL); -+ } -+ -+ /** -+ * @deprecated Chunk tasks must be tied to coordinates in the future -+ */ -+ @Deprecated -+ public PrioritisedExecutor.PrioritisedTask scheduleChunkTask(final Runnable run, final PrioritisedExecutor.Priority priority) { -+ return this.mainThreadExecutor.queueRunnable(run, priority); -+ } -+ -+ public PrioritisedExecutor.PrioritisedTask createChunkTask(final int chunkX, final int chunkZ, final Runnable run) { -+ return this.createChunkTask(chunkX, chunkZ, run, PrioritisedExecutor.Priority.NORMAL); -+ } -+ -+ public PrioritisedExecutor.PrioritisedTask createChunkTask(final int chunkX, final int chunkZ, final Runnable run, -+ final PrioritisedExecutor.Priority priority) { -+ return this.mainThreadExecutor.createTask(run, priority); -+ } -+ -+ public PrioritisedExecutor.PrioritisedTask scheduleChunkTask(final int chunkX, final int chunkZ, final Runnable run) { -+ return this.mainThreadExecutor.queueRunnable(run); -+ } -+ -+ public PrioritisedExecutor.PrioritisedTask scheduleChunkTask(final int chunkX, final int chunkZ, final Runnable run, -+ final PrioritisedExecutor.Priority priority) { -+ return this.mainThreadExecutor.queueRunnable(run, priority); -+ } -+ -+ public void executeTasksUntil(final BooleanSupplier exit) { -+ if (Bukkit.isPrimaryThread()) { -+ this.mainThreadExecutor.executeConditionally(exit); -+ } else { -+ long counter = 1L; -+ while (!exit.getAsBoolean()) { -+ counter = ConcurrentUtil.linearLongBackoff(counter, 100_000L, 5_000_000L); // 100us, 5ms -+ } -+ } -+ } -+ -+ public boolean halt(final boolean sync, final long maxWaitNS) { -+ this.radiusAwareGenExecutor.halt(); -+ this.parallelGenExecutor.halt(); -+ this.loadExecutor.halt(); -+ final long time = System.nanoTime(); -+ if (sync) { -+ for (long failures = 9L;; failures = ConcurrentUtil.linearLongBackoff(failures, 500_000L, 50_000_000L)) { -+ if ( -+ !this.radiusAwareGenExecutor.isActive() && -+ !this.parallelGenExecutor.isActive() && -+ !this.loadExecutor.isActive() -+ ) { -+ return true; -+ } -+ if ((System.nanoTime() - time) >= maxWaitNS) { -+ return false; -+ } -+ } -+ } -+ -+ return true; -+ } -+ -+ public static final ArrayDeque WAITING_CHUNKS = new ArrayDeque<>(); // stack -+ -+ public static final class ChunkInfo { -+ -+ public final int chunkX; -+ public final int chunkZ; -+ public final ServerLevel world; -+ -+ public ChunkInfo(final int chunkX, final int chunkZ, final ServerLevel world) { -+ this.chunkX = chunkX; -+ this.chunkZ = chunkZ; -+ this.world = world; -+ } -+ -+ @Override -+ public String toString() { -+ return "[( " + this.chunkX + "," + this.chunkZ + ") in '" + this.world.getWorld().getName() + "']"; -+ } -+ } -+ -+ public static void pushChunkWait(final ServerLevel world, final int chunkX, final int chunkZ) { -+ synchronized (WAITING_CHUNKS) { -+ WAITING_CHUNKS.push(new ChunkInfo(chunkX, chunkZ, world)); -+ } -+ } -+ -+ public static void popChunkWait() { -+ synchronized (WAITING_CHUNKS) { -+ WAITING_CHUNKS.pop(); -+ } -+ } -+ -+ public static ChunkInfo[] getChunkInfos() { -+ synchronized (WAITING_CHUNKS) { -+ return WAITING_CHUNKS.toArray(new ChunkInfo[0]); -+ } -+ } -+ -+ public static void dumpAllChunkLoadInfo(final boolean longPrint) { -+ final ChunkInfo[] chunkInfos = getChunkInfos(); -+ if (chunkInfos.length > 0) { -+ LOGGER.error("Chunk wait task info below: "); -+ for (final ChunkInfo chunkInfo : chunkInfos) { -+ final NewChunkHolder holder = chunkInfo.world.chunkTaskScheduler.chunkHolderManager.getChunkHolder(chunkInfo.chunkX, chunkInfo.chunkZ); -+ LOGGER.error("Chunk wait: " + chunkInfo); -+ LOGGER.error("Chunk holder: " + holder); -+ } -+ -+ if (longPrint) { -+ final File file = new File(new File(new File("."), "debug"), "chunks-watchdog.txt"); -+ LOGGER.error("Writing chunk information dump to " + file); -+ try { -+ MCUtil.dumpChunks(file, true); -+ LOGGER.error("Successfully written chunk information!"); -+ } catch (final Throwable thr) { -+ MinecraftServer.LOGGER.warn("Failed to dump chunk information to file " + file.toString(), thr); -+ } -+ } -+ } -+ } -+} -diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkUpgradeGenericStatusTask.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkUpgradeGenericStatusTask.java -new file mode 100644 -index 0000000000000000000000000000000000000000..bd0d0c4436f357392e13d9efd4412886385a6924 ---- /dev/null -+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkUpgradeGenericStatusTask.java -@@ -0,0 +1,214 @@ -+package io.papermc.paper.chunk.system.scheduling; -+ -+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; -+import ca.spottedleaf.concurrentutil.util.ConcurrentUtil; -+import com.mojang.logging.LogUtils; -+import net.minecraft.server.level.ChunkMap; -+import net.minecraft.server.level.ChunkResult; -+import net.minecraft.server.level.ServerChunkCache; -+import net.minecraft.server.level.ServerLevel; -+import net.minecraft.world.level.chunk.ChunkAccess; -+import net.minecraft.world.level.chunk.status.ChunkStatus; -+import net.minecraft.world.level.chunk.ProtoChunk; -+import net.minecraft.world.level.chunk.status.WorldGenContext; -+import org.slf4j.Logger; -+import java.lang.invoke.VarHandle; -+import java.util.List; -+import java.util.Map; -+import java.util.concurrent.CompletableFuture; -+ -+public final class ChunkUpgradeGenericStatusTask extends ChunkProgressionTask implements Runnable { -+ -+ private static final Logger LOGGER = LogUtils.getClassLogger(); -+ -+ protected final ChunkAccess fromChunk; -+ protected final ChunkStatus fromStatus; -+ protected final ChunkStatus toStatus; -+ protected final List neighbours; -+ -+ protected final PrioritisedExecutor.PrioritisedTask generateTask; -+ -+ public ChunkUpgradeGenericStatusTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX, -+ final int chunkZ, final ChunkAccess chunk, final List neighbours, -+ final ChunkStatus toStatus, final PrioritisedExecutor.Priority priority) { -+ super(scheduler, world, chunkX, chunkZ); -+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { -+ throw new IllegalArgumentException("Invalid priority " + priority); -+ } -+ this.fromChunk = chunk; -+ this.fromStatus = chunk.getStatus(); -+ this.toStatus = toStatus; -+ this.neighbours = neighbours; -+ if (this.toStatus.isParallelCapable) { -+ this.generateTask = this.scheduler.parallelGenExecutor.createTask(this, priority); -+ } else { -+ this.generateTask = this.scheduler.radiusAwareScheduler.createTask(chunkX, chunkZ, this.toStatus.writeRadius, this, priority); -+ } -+ } -+ -+ @Override -+ public ChunkStatus getTargetStatus() { -+ return this.toStatus; -+ } -+ -+ private boolean isEmptyTask() { -+ // must use fromStatus here to avoid any race condition with run() overwriting the status -+ final boolean generation = !this.fromStatus.isOrAfter(this.toStatus); -+ return (generation && this.toStatus.isEmptyGenStatus()) || (!generation && this.toStatus.isEmptyLoadStatus()); -+ } -+ -+ @Override -+ public void run() { -+ final ChunkAccess chunk = this.fromChunk; -+ -+ final ServerChunkCache serverChunkCache = this.world.chunkSource; -+ final ChunkMap chunkMap = serverChunkCache.chunkMap; -+ -+ final CompletableFuture completeFuture; -+ -+ final boolean generation; -+ boolean completing = false; -+ -+ // note: should optimise the case where the chunk does not need to execute the status, because -+ // schedule() calls this synchronously if it will run through that path -+ -+ final WorldGenContext ctx = new WorldGenContext( -+ this.world, -+ chunkMap.generator, -+ chunkMap.getWorldGenContext().structureManager(), -+ serverChunkCache.getLightEngine() -+ ); -+ try { -+ generation = !chunk.getStatus().isOrAfter(this.toStatus); -+ if (generation) { -+ if (this.toStatus.isEmptyGenStatus()) { -+ if (chunk instanceof ProtoChunk) { -+ ((ProtoChunk)chunk).setStatus(this.toStatus); -+ } -+ completing = true; -+ this.complete(chunk, null); -+ return; -+ } -+ completeFuture = this.toStatus.generate(ctx, Runnable::run, null, this.neighbours) -+ .whenComplete((final ChunkAccess either, final Throwable throwable) -> { -+ if (either instanceof ProtoChunk proto) { -+ proto.setStatus(ChunkUpgradeGenericStatusTask.this.toStatus); -+ } -+ } -+ ); -+ } else { -+ if (this.toStatus.isEmptyLoadStatus()) { -+ completing = true; -+ this.complete(chunk, null); -+ return; -+ } -+ completeFuture = this.toStatus.load(ctx, null, chunk); -+ } -+ } catch (final Throwable throwable) { -+ if (!completing) { -+ this.complete(null, throwable); -+ -+ if (throwable instanceof ThreadDeath) { -+ throw (ThreadDeath)throwable; -+ } -+ return; -+ } -+ -+ this.scheduler.unrecoverableChunkSystemFailure(this.chunkX, this.chunkZ, Map.of( -+ "Target status", ChunkTaskScheduler.stringIfNull(this.toStatus), -+ "From status", ChunkTaskScheduler.stringIfNull(this.fromStatus), -+ "Generation task", this -+ ), throwable); -+ -+ if (!(throwable instanceof ThreadDeath)) { -+ LOGGER.error("Failed to complete status for chunk: status:" + this.toStatus + ", chunk: (" + this.chunkX + "," + this.chunkZ + "), world: " + this.world.getWorld().getName(), throwable); -+ } else { -+ // ensure the chunk system can respond, then die -+ throw (ThreadDeath)throwable; -+ } -+ return; -+ } -+ -+ if (!completeFuture.isDone() && !this.toStatus.warnedAboutNoImmediateComplete.getAndSet(true)) { -+ LOGGER.warn("Future status not complete after scheduling: " + this.toStatus.toString() + ", generate: " + generation); -+ } -+ -+ final ChunkAccess newChunk; -+ -+ try { -+ newChunk = completeFuture.join(); -+ } catch (final Throwable throwable) { -+ this.complete(null, throwable); -+ // ensure the chunk system can respond, then die -+ if (throwable instanceof ThreadDeath) { -+ throw (ThreadDeath)throwable; -+ } -+ return; -+ } -+ -+ if (newChunk == null) { -+ this.complete(null, new IllegalStateException("Chunk for status: " + ChunkUpgradeGenericStatusTask.this.toStatus.toString() + ", generation: " + generation + " should not be null! Future: " + completeFuture).fillInStackTrace()); -+ return; -+ } -+ -+ this.complete(newChunk, null); -+ } -+ -+ protected volatile boolean scheduled; -+ protected static final VarHandle SCHEDULED_HANDLE = ConcurrentUtil.getVarHandle(ChunkUpgradeGenericStatusTask.class, "scheduled", boolean.class); -+ -+ @Override -+ public boolean isScheduled() { -+ return this.scheduled; -+ } -+ -+ @Override -+ public void schedule() { -+ if ((boolean)SCHEDULED_HANDLE.getAndSet((ChunkUpgradeGenericStatusTask)this, true)) { -+ throw new IllegalStateException("Cannot double call schedule()"); -+ } -+ if (this.isEmptyTask()) { -+ if (this.generateTask.cancel()) { -+ this.run(); -+ } -+ } else { -+ this.generateTask.queue(); -+ } -+ } -+ -+ @Override -+ public void cancel() { -+ if (this.generateTask.cancel()) { -+ this.complete(null, null); -+ } -+ } -+ -+ @Override -+ public PrioritisedExecutor.Priority getPriority() { -+ return this.generateTask.getPriority(); -+ } -+ -+ @Override -+ public void lowerPriority(final PrioritisedExecutor.Priority priority) { -+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { -+ throw new IllegalArgumentException("Invalid priority " + priority); -+ } -+ this.generateTask.lowerPriority(priority); -+ } -+ -+ @Override -+ public void setPriority(final PrioritisedExecutor.Priority priority) { -+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { -+ throw new IllegalArgumentException("Invalid priority " + priority); -+ } -+ this.generateTask.setPriority(priority); -+ } -+ -+ @Override -+ public void raisePriority(final PrioritisedExecutor.Priority priority) { -+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { -+ throw new IllegalArgumentException("Invalid priority " + priority); -+ } -+ this.generateTask.raisePriority(priority); -+ } -+} -diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/GenericDataLoadTask.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/GenericDataLoadTask.java -new file mode 100644 -index 0000000000000000000000000000000000000000..396d72c00e47cf1669ae20dc839c1c961b1f262a ---- /dev/null -+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/GenericDataLoadTask.java -@@ -0,0 +1,746 @@ -+package io.papermc.paper.chunk.system.scheduling; -+ -+import ca.spottedleaf.concurrentutil.completable.Completable; -+import ca.spottedleaf.concurrentutil.executor.Cancellable; -+import ca.spottedleaf.concurrentutil.executor.standard.DelayedPrioritisedTask; -+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; -+import ca.spottedleaf.concurrentutil.util.ConcurrentUtil; -+import com.mojang.logging.LogUtils; -+import io.papermc.paper.chunk.system.io.RegionFileIOThread; -+import net.minecraft.nbt.CompoundTag; -+import net.minecraft.server.level.ServerLevel; -+import org.slf4j.Logger; -+import java.lang.invoke.VarHandle; -+import java.util.Map; -+import java.util.concurrent.atomic.AtomicBoolean; -+import java.util.concurrent.atomic.AtomicLong; -+import java.util.function.BiConsumer; -+ -+public abstract class GenericDataLoadTask { -+ -+ private static final Logger LOGGER = LogUtils.getClassLogger(); -+ -+ protected static final CompoundTag CANCELLED_DATA = new CompoundTag(); -+ -+ // reference count is the upper 32 bits -+ protected final AtomicLong stageAndReferenceCount = new AtomicLong(STAGE_NOT_STARTED); -+ -+ protected static final long STAGE_MASK = 0xFFFFFFFFL; -+ protected static final long STAGE_CANCELLED = 0xFFFFFFFFL; -+ protected static final long STAGE_NOT_STARTED = 0L; -+ protected static final long STAGE_LOADING = 1L; -+ protected static final long STAGE_PROCESSING = 2L; -+ protected static final long STAGE_COMPLETED = 3L; -+ -+ // for loading data off disk -+ protected final LoadDataFromDiskTask loadDataFromDiskTask; -+ // processing off-main -+ protected final PrioritisedExecutor.PrioritisedTask processOffMain; -+ // processing on-main -+ protected final PrioritisedExecutor.PrioritisedTask processOnMain; -+ -+ protected final ChunkTaskScheduler scheduler; -+ protected final ServerLevel world; -+ protected final int chunkX; -+ protected final int chunkZ; -+ protected final RegionFileIOThread.RegionFileType type; -+ -+ public GenericDataLoadTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX, -+ final int chunkZ, final RegionFileIOThread.RegionFileType type, -+ final PrioritisedExecutor.Priority priority) { -+ this.scheduler = scheduler; -+ this.world = world; -+ this.chunkX = chunkX; -+ this.chunkZ = chunkZ; -+ this.type = type; -+ -+ final ProcessOnMainTask mainTask; -+ if (this.hasOnMain()) { -+ mainTask = new ProcessOnMainTask(); -+ this.processOnMain = this.createOnMain(mainTask, priority); -+ } else { -+ mainTask = null; -+ this.processOnMain = null; -+ } -+ -+ final ProcessOffMainTask offMainTask; -+ if (this.hasOffMain()) { -+ offMainTask = new ProcessOffMainTask(mainTask); -+ this.processOffMain = this.createOffMain(offMainTask, priority); -+ } else { -+ offMainTask = null; -+ this.processOffMain = null; -+ } -+ -+ if (this.processOffMain == null && this.processOnMain == null) { -+ throw new IllegalStateException("Illegal class implementation: " + this.getClass().getName() + ", should be able to schedule at least one task!"); -+ } -+ -+ this.loadDataFromDiskTask = new LoadDataFromDiskTask(world, chunkX, chunkZ, type, new DataLoadCallback(offMainTask, mainTask), priority); -+ } -+ -+ public static final record TaskResult(L left, R right) {} -+ -+ protected abstract boolean hasOffMain(); -+ -+ protected abstract boolean hasOnMain(); -+ -+ protected abstract PrioritisedExecutor.PrioritisedTask createOffMain(final Runnable run, final PrioritisedExecutor.Priority priority); -+ -+ protected abstract PrioritisedExecutor.PrioritisedTask createOnMain(final Runnable run, final PrioritisedExecutor.Priority priority); -+ -+ protected abstract TaskResult runOffMain(final CompoundTag data, final Throwable throwable); -+ -+ protected abstract TaskResult runOnMain(final OnMain data, final Throwable throwable); -+ -+ protected abstract void onComplete(final TaskResult result); -+ -+ protected abstract TaskResult completeOnMainOffMain(final OnMain data, final Throwable throwable); -+ -+ @Override -+ public String toString() { -+ return "GenericDataLoadTask{class: " + this.getClass().getName() + ", world: " + this.world.getWorld().getName() + -+ ", chunk: (" + this.chunkX + "," + this.chunkZ + "), hashcode: " + System.identityHashCode(this) + ", priority: " + this.getPriority() + -+ ", type: " + this.type.toString() + "}"; -+ } -+ -+ public PrioritisedExecutor.Priority getPriority() { -+ if (this.processOnMain != null) { -+ return this.processOnMain.getPriority(); -+ } else { -+ return this.processOffMain.getPriority(); -+ } -+ } -+ -+ public void lowerPriority(final PrioritisedExecutor.Priority priority) { -+ // can't lower I/O tasks, we don't know what they affect -+ if (this.processOffMain != null) { -+ this.processOffMain.lowerPriority(priority); -+ } -+ if (this.processOnMain != null) { -+ this.processOnMain.lowerPriority(priority); -+ } -+ } -+ -+ public void setPriority(final PrioritisedExecutor.Priority priority) { -+ // can't lower I/O tasks, we don't know what they affect -+ this.loadDataFromDiskTask.raisePriority(priority); -+ if (this.processOffMain != null) { -+ this.processOffMain.setPriority(priority); -+ } -+ if (this.processOnMain != null) { -+ this.processOnMain.setPriority(priority); -+ } -+ } -+ -+ public void raisePriority(final PrioritisedExecutor.Priority priority) { -+ // can't lower I/O tasks, we don't know what they affect -+ this.loadDataFromDiskTask.raisePriority(priority); -+ if (this.processOffMain != null) { -+ this.processOffMain.raisePriority(priority); -+ } -+ if (this.processOnMain != null) { -+ this.processOnMain.raisePriority(priority); -+ } -+ } -+ -+ // returns whether scheduleNow() needs to be called -+ public boolean schedule(final boolean delay) { -+ if (this.stageAndReferenceCount.get() != STAGE_NOT_STARTED || -+ !this.stageAndReferenceCount.compareAndSet(STAGE_NOT_STARTED, (1L << 32) | STAGE_LOADING)) { -+ // try and increment reference count -+ int failures = 0; -+ for (long curr = this.stageAndReferenceCount.get();;) { -+ if ((curr & STAGE_MASK) == STAGE_CANCELLED || (curr & STAGE_MASK) == STAGE_COMPLETED) { -+ // cancelled or completed, nothing to do here -+ return false; -+ } -+ -+ if (curr == (curr = this.stageAndReferenceCount.compareAndExchange(curr, curr + (1L << 32)))) { -+ // successful -+ return false; -+ } -+ -+ ++failures; -+ for (int i = 0; i < failures; ++i) { -+ ConcurrentUtil.backoff(); -+ } -+ } -+ } -+ -+ if (!delay) { -+ this.scheduleNow(); -+ return false; -+ } -+ return true; -+ } -+ -+ public void scheduleNow() { -+ this.loadDataFromDiskTask.schedule(); // will schedule the rest -+ } -+ -+ // assumes the current stage cannot be completed -+ // returns false if cancelled, returns true if can proceed -+ private boolean advanceStage(final long expect, final long to) { -+ int failures = 0; -+ for (long curr = this.stageAndReferenceCount.get();;) { -+ if ((curr & STAGE_MASK) != expect) { -+ // must be cancelled -+ return false; -+ } -+ -+ final long newVal = (curr & ~STAGE_MASK) | to; -+ if (curr == (curr = this.stageAndReferenceCount.compareAndExchange(curr, newVal))) { -+ return true; -+ } -+ -+ ++failures; -+ for (int i = 0; i < failures; ++i) { -+ ConcurrentUtil.backoff(); -+ } -+ } -+ } -+ -+ public boolean cancel() { -+ int failures = 0; -+ for (long curr = this.stageAndReferenceCount.get();;) { -+ if ((curr & STAGE_MASK) == STAGE_COMPLETED || (curr & STAGE_MASK) == STAGE_CANCELLED) { -+ return false; -+ } -+ -+ if ((curr & STAGE_MASK) == STAGE_NOT_STARTED || (curr & ~STAGE_MASK) == (1L << 32)) { -+ // no other references, so we can cancel -+ final long newVal = STAGE_CANCELLED; -+ if (curr == (curr = this.stageAndReferenceCount.compareAndExchange(curr, newVal))) { -+ this.loadDataFromDiskTask.cancel(); -+ if (this.processOffMain != null) { -+ this.processOffMain.cancel(); -+ } -+ if (this.processOnMain != null) { -+ this.processOnMain.cancel(); -+ } -+ this.onComplete(null); -+ return true; -+ } -+ } else { -+ if ((curr & ~STAGE_MASK) == (0L << 32)) { -+ throw new IllegalStateException("Reference count cannot be zero here"); -+ } -+ // just decrease the reference count -+ final long newVal = curr - (1L << 32); -+ if (curr == (curr = this.stageAndReferenceCount.compareAndExchange(curr, newVal))) { -+ return false; -+ } -+ } -+ -+ ++failures; -+ for (int i = 0; i < failures; ++i) { -+ ConcurrentUtil.backoff(); -+ } -+ } -+ } -+ -+ protected final class DataLoadCallback implements BiConsumer { -+ -+ protected final ProcessOffMainTask offMainTask; -+ protected final ProcessOnMainTask onMainTask; -+ -+ public DataLoadCallback(final ProcessOffMainTask offMainTask, final ProcessOnMainTask onMainTask) { -+ this.offMainTask = offMainTask; -+ this.onMainTask = onMainTask; -+ } -+ -+ @Override -+ public void accept(final CompoundTag compoundTag, final Throwable throwable) { -+ if (GenericDataLoadTask.this.stageAndReferenceCount.get() == STAGE_CANCELLED) { -+ // don't try to schedule further -+ return; -+ } -+ -+ try { -+ if (compoundTag == CANCELLED_DATA) { -+ // cancelled, except this isn't possible -+ LOGGER.error("Data callback says cancelled, but stage does not?"); -+ return; -+ } -+ -+ // get off of the regionfile callback ASAP, no clue what locks are held right now... -+ if (GenericDataLoadTask.this.processOffMain != null) { -+ this.offMainTask.data = compoundTag; -+ this.offMainTask.throwable = throwable; -+ GenericDataLoadTask.this.processOffMain.queue(); -+ return; -+ } else { -+ // no off-main task, so go straight to main -+ this.onMainTask.data = (OnMain)compoundTag; -+ this.onMainTask.throwable = throwable; -+ GenericDataLoadTask.this.processOnMain.queue(); -+ } -+ } catch (final ThreadDeath death) { -+ throw death; -+ } catch (final Throwable thr2) { -+ LOGGER.error("Failed I/O callback for task: " + GenericDataLoadTask.this.toString(), thr2); -+ GenericDataLoadTask.this.scheduler.unrecoverableChunkSystemFailure( -+ GenericDataLoadTask.this.chunkX, GenericDataLoadTask.this.chunkZ, Map.of( -+ "Callback throwable", ChunkTaskScheduler.stringIfNull(throwable) -+ ), thr2); -+ } -+ } -+ } -+ -+ protected final class ProcessOffMainTask implements Runnable { -+ -+ protected CompoundTag data; -+ protected Throwable throwable; -+ protected final ProcessOnMainTask schedule; -+ -+ public ProcessOffMainTask(final ProcessOnMainTask schedule) { -+ this.schedule = schedule; -+ } -+ -+ @Override -+ public void run() { -+ if (!GenericDataLoadTask.this.advanceStage(STAGE_LOADING, this.schedule == null ? STAGE_COMPLETED : STAGE_PROCESSING)) { -+ // cancelled -+ return; -+ } -+ final TaskResult newData = GenericDataLoadTask.this.runOffMain(this.data, this.throwable); -+ -+ if (GenericDataLoadTask.this.stageAndReferenceCount.get() == STAGE_CANCELLED) { -+ // don't try to schedule further -+ return; -+ } -+ -+ if (this.schedule != null) { -+ final TaskResult syncComplete = GenericDataLoadTask.this.completeOnMainOffMain(newData.left, newData.right); -+ -+ if (syncComplete != null) { -+ if (GenericDataLoadTask.this.advanceStage(STAGE_PROCESSING, STAGE_COMPLETED)) { -+ GenericDataLoadTask.this.onComplete(syncComplete); -+ } // else: cancelled -+ return; -+ } -+ -+ this.schedule.data = newData.left; -+ this.schedule.throwable = newData.right; -+ -+ GenericDataLoadTask.this.processOnMain.queue(); -+ } else { -+ GenericDataLoadTask.this.onComplete((TaskResult)newData); -+ } -+ } -+ } -+ -+ protected final class ProcessOnMainTask implements Runnable { -+ -+ protected OnMain data; -+ protected Throwable throwable; -+ -+ @Override -+ public void run() { -+ if (!GenericDataLoadTask.this.advanceStage(STAGE_PROCESSING, STAGE_COMPLETED)) { -+ // cancelled -+ return; -+ } -+ final TaskResult result = GenericDataLoadTask.this.runOnMain(this.data, this.throwable); -+ -+ GenericDataLoadTask.this.onComplete(result); -+ } -+ } -+ -+ public static final class LoadDataFromDiskTask { -+ -+ protected volatile int priority; -+ protected static final VarHandle PRIORITY_HANDLE = ConcurrentUtil.getVarHandle(LoadDataFromDiskTask.class, "priority", int.class); -+ -+ protected static final int PRIORITY_EXECUTED = Integer.MIN_VALUE >>> 0; -+ protected static final int PRIORITY_LOAD_SCHEDULED = Integer.MIN_VALUE >>> 1; -+ protected static final int PRIORITY_UNLOAD_SCHEDULED = Integer.MIN_VALUE >>> 2; -+ -+ protected static final int PRIORITY_FLAGS = ~Character.MAX_VALUE; -+ -+ protected final int getPriorityVolatile() { -+ return (int)PRIORITY_HANDLE.getVolatile((LoadDataFromDiskTask)this); -+ } -+ -+ protected final int compareAndExchangePriorityVolatile(final int expect, final int update) { -+ return (int)PRIORITY_HANDLE.compareAndExchange((LoadDataFromDiskTask)this, (int)expect, (int)update); -+ } -+ -+ protected final int getAndOrPriorityVolatile(final int val) { -+ return (int)PRIORITY_HANDLE.getAndBitwiseOr((LoadDataFromDiskTask)this, (int)val); -+ } -+ -+ protected final void setPriorityPlain(final int val) { -+ PRIORITY_HANDLE.set((LoadDataFromDiskTask)this, (int)val); -+ } -+ -+ private final ServerLevel world; -+ private final int chunkX; -+ private final int chunkZ; -+ -+ private final RegionFileIOThread.RegionFileType type; -+ private Cancellable dataLoadTask; -+ private Cancellable dataUnloadCancellable; -+ private DelayedPrioritisedTask dataUnloadTask; -+ -+ private final BiConsumer onComplete; -+ -+ // onComplete should be caller sensitive, it may complete synchronously with schedule() - which does -+ // hold a priority lock. -+ public LoadDataFromDiskTask(final ServerLevel world, final int chunkX, final int chunkZ, -+ final RegionFileIOThread.RegionFileType type, -+ final BiConsumer onComplete, -+ final PrioritisedExecutor.Priority priority) { -+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { -+ throw new IllegalArgumentException("Invalid priority " + priority); -+ } -+ this.world = world; -+ this.chunkX = chunkX; -+ this.chunkZ = chunkZ; -+ this.type = type; -+ this.onComplete = onComplete; -+ this.setPriorityPlain(priority.priority); -+ } -+ -+ private void complete(final CompoundTag data, final Throwable throwable) { -+ try { -+ this.onComplete.accept(data, throwable); -+ } catch (final Throwable thr2) { -+ this.world.chunkTaskScheduler.unrecoverableChunkSystemFailure(this.chunkX, this.chunkZ, Map.of( -+ "Completed throwable", ChunkTaskScheduler.stringIfNull(throwable), -+ "Regionfile type", ChunkTaskScheduler.stringIfNull(this.type) -+ ), thr2); -+ if (thr2 instanceof ThreadDeath) { -+ throw (ThreadDeath)thr2; -+ } -+ } -+ } -+ -+ protected boolean markExecuting() { -+ return (this.getAndOrPriorityVolatile(PRIORITY_EXECUTED) & PRIORITY_EXECUTED) == 0; -+ } -+ -+ protected boolean isMarkedExecuted() { -+ return (this.getPriorityVolatile() & PRIORITY_EXECUTED) != 0; -+ } -+ -+ public void lowerPriority(final PrioritisedExecutor.Priority priority) { -+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { -+ throw new IllegalArgumentException("Invalid priority " + priority); -+ } -+ -+ int failures = 0; -+ for (int curr = this.getPriorityVolatile();;) { -+ if ((curr & PRIORITY_EXECUTED) != 0) { -+ // cancelled or executed -+ return; -+ } -+ -+ if ((curr & PRIORITY_LOAD_SCHEDULED) != 0) { -+ RegionFileIOThread.lowerPriority(this.world, this.chunkX, this.chunkZ, this.type, priority); -+ return; -+ } -+ -+ if ((curr & PRIORITY_UNLOAD_SCHEDULED) != 0) { -+ if (this.dataUnloadTask != null) { -+ this.dataUnloadTask.lowerPriority(priority); -+ } -+ // no return - we need to propagate priority -+ } -+ -+ if (!priority.isHigherPriority(curr & ~PRIORITY_FLAGS)) { -+ return; -+ } -+ -+ if (curr == (curr = this.compareAndExchangePriorityVolatile(curr, priority.priority | (curr & PRIORITY_FLAGS)))) { -+ return; -+ } -+ -+ // failed, retry -+ -+ ++failures; -+ for (int i = 0; i < failures; ++i) { -+ ConcurrentUtil.backoff(); -+ } -+ } -+ } -+ -+ public void setPriority(final PrioritisedExecutor.Priority priority) { -+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { -+ throw new IllegalArgumentException("Invalid priority " + priority); -+ } -+ -+ int failures = 0; -+ for (int curr = this.getPriorityVolatile();;) { -+ if ((curr & PRIORITY_EXECUTED) != 0) { -+ // cancelled or executed -+ return; -+ } -+ -+ if ((curr & PRIORITY_LOAD_SCHEDULED) != 0) { -+ RegionFileIOThread.setPriority(this.world, this.chunkX, this.chunkZ, this.type, priority); -+ return; -+ } -+ -+ if ((curr & PRIORITY_UNLOAD_SCHEDULED) != 0) { -+ if (this.dataUnloadTask != null) { -+ this.dataUnloadTask.setPriority(priority); -+ } -+ // no return - we need to propagate priority -+ } -+ -+ if (curr == (curr = this.compareAndExchangePriorityVolatile(curr, priority.priority | (curr & PRIORITY_FLAGS)))) { -+ return; -+ } -+ -+ // failed, retry -+ -+ ++failures; -+ for (int i = 0; i < failures; ++i) { -+ ConcurrentUtil.backoff(); -+ } -+ } -+ } -+ -+ public void raisePriority(final PrioritisedExecutor.Priority priority) { -+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { -+ throw new IllegalArgumentException("Invalid priority " + priority); -+ } -+ -+ int failures = 0; -+ for (int curr = this.getPriorityVolatile();;) { -+ if ((curr & PRIORITY_EXECUTED) != 0) { -+ // cancelled or executed -+ return; -+ } -+ -+ if ((curr & PRIORITY_LOAD_SCHEDULED) != 0) { -+ RegionFileIOThread.raisePriority(this.world, this.chunkX, this.chunkZ, this.type, priority); -+ return; -+ } -+ -+ if ((curr & PRIORITY_UNLOAD_SCHEDULED) != 0) { -+ if (this.dataUnloadTask != null) { -+ this.dataUnloadTask.raisePriority(priority); -+ } -+ // no return - we need to propagate priority -+ } -+ -+ if (!priority.isLowerPriority(curr & ~PRIORITY_FLAGS)) { -+ return; -+ } -+ -+ if (curr == (curr = this.compareAndExchangePriorityVolatile(curr, priority.priority | (curr & PRIORITY_FLAGS)))) { -+ return; -+ } -+ -+ // failed, retry -+ -+ ++failures; -+ for (int i = 0; i < failures; ++i) { -+ ConcurrentUtil.backoff(); -+ } -+ } -+ } -+ -+ public void cancel() { -+ if ((this.getAndOrPriorityVolatile(PRIORITY_EXECUTED) & PRIORITY_EXECUTED) != 0) { -+ // cancelled or executed already -+ return; -+ } -+ -+ // OK if we miss the field read, the task cannot complete if the cancelled bit is set and -+ // the write to dataLoadTask will check for the cancelled bit -+ if (this.dataUnloadCancellable != null) { -+ this.dataUnloadCancellable.cancel(); -+ } -+ -+ if (this.dataLoadTask != null) { -+ this.dataLoadTask.cancel(); -+ } -+ -+ this.complete(CANCELLED_DATA, null); -+ } -+ -+ private final AtomicBoolean scheduled = new AtomicBoolean(); -+ -+ public void schedule() { -+ if (this.scheduled.getAndSet(true)) { -+ throw new IllegalStateException("schedule() called twice"); -+ } -+ int priority = this.getPriorityVolatile(); -+ -+ if ((priority & PRIORITY_EXECUTED) != 0) { -+ // cancelled -+ return; -+ } -+ -+ final BiConsumer consumer = (final CompoundTag data, final Throwable thr) -> { -+ // because cancelScheduled() cannot actually stop this task from executing in every case, we need -+ // to mark complete here to ensure we do not double complete -+ if (LoadDataFromDiskTask.this.markExecuting()) { -+ LoadDataFromDiskTask.this.complete(data, thr); -+ } // else: cancelled -+ }; -+ -+ final PrioritisedExecutor.Priority initialPriority = PrioritisedExecutor.Priority.getPriority(priority); -+ boolean scheduledUnload = false; -+ -+ final NewChunkHolder holder = this.world.chunkTaskScheduler.chunkHolderManager.getChunkHolder(this.chunkX, this.chunkZ); -+ if (holder != null) { -+ final BiConsumer unloadConsumer = (final CompoundTag data, final Throwable thr) -> { -+ if (data != null) { -+ consumer.accept(data, null); -+ } else { -+ // need to schedule task -+ LoadDataFromDiskTask.this.schedule(false, consumer, PrioritisedExecutor.Priority.getPriority(LoadDataFromDiskTask.this.getPriorityVolatile() & ~PRIORITY_FLAGS)); -+ } -+ }; -+ Cancellable unloadCancellable = null; -+ CompoundTag syncComplete = null; -+ final NewChunkHolder.UnloadTask unloadTask = holder.getUnloadTask(this.type); // can be null if no task exists -+ final Completable unloadCompletable = unloadTask == null ? null : unloadTask.completable(); -+ if (unloadCompletable != null) { -+ unloadCancellable = unloadCompletable.addAsynchronousWaiter(unloadConsumer); -+ if (unloadCancellable == null) { -+ syncComplete = unloadCompletable.getResult(); -+ } -+ } -+ -+ if (syncComplete != null) { -+ consumer.accept(syncComplete, null); -+ return; -+ } -+ -+ if (unloadCancellable != null) { -+ scheduledUnload = true; -+ this.dataUnloadCancellable = unloadCancellable; -+ this.dataUnloadTask = unloadTask.task(); -+ } -+ } -+ -+ this.schedule(scheduledUnload, consumer, initialPriority); -+ } -+ -+ private void schedule(final boolean scheduledUnload, final BiConsumer consumer, final PrioritisedExecutor.Priority initialPriority) { -+ int priority = this.getPriorityVolatile(); -+ -+ if ((priority & PRIORITY_EXECUTED) != 0) { -+ // cancelled -+ return; -+ } -+ -+ if (!scheduledUnload) { -+ this.dataLoadTask = RegionFileIOThread.loadDataAsync( -+ this.world, this.chunkX, this.chunkZ, this.type, consumer, -+ initialPriority.isHigherPriority(PrioritisedExecutor.Priority.NORMAL), initialPriority -+ ); -+ } -+ -+ int failures = 0; -+ for (;;) { -+ if (priority == (priority = this.compareAndExchangePriorityVolatile(priority, priority | (scheduledUnload ? PRIORITY_UNLOAD_SCHEDULED : PRIORITY_LOAD_SCHEDULED)))) { -+ return; -+ } -+ -+ if ((priority & PRIORITY_EXECUTED) != 0) { -+ // cancelled or executed -+ if (this.dataUnloadCancellable != null) { -+ this.dataUnloadCancellable.cancel(); -+ } -+ -+ if (this.dataLoadTask != null) { -+ this.dataLoadTask.cancel(); -+ } -+ return; -+ } -+ -+ if (scheduledUnload) { -+ if (this.dataUnloadTask != null) { -+ this.dataUnloadTask.setPriority(PrioritisedExecutor.Priority.getPriority(priority & ~PRIORITY_FLAGS)); -+ } -+ } else { -+ RegionFileIOThread.setPriority(this.world, this.chunkX, this.chunkZ, this.type, PrioritisedExecutor.Priority.getPriority(priority & ~PRIORITY_FLAGS)); -+ } -+ -+ ++failures; -+ for (int i = 0; i < failures; ++i) { -+ ConcurrentUtil.backoff(); -+ } -+ } -+ } -+ -+ /* -+ private static final class LoadDataPriorityHolder extends PriorityHolder { -+ -+ protected final LoadDataFromDiskTask task; -+ -+ protected LoadDataPriorityHolder(final PrioritisedExecutor.Priority priority, final LoadDataFromDiskTask task) { -+ super(priority); -+ this.task = task; -+ } -+ -+ @Override -+ protected void cancelScheduled() { -+ final Cancellable dataLoadTask = this.task.dataLoadTask; -+ if (dataLoadTask != null) { -+ // OK if we miss the field read, the task cannot complete if the cancelled bit is set and -+ // the write to dataLoadTask will check for the cancelled bit -+ this.task.dataLoadTask.cancel(); -+ } -+ this.task.complete(CANCELLED_DATA, null); -+ } -+ -+ @Override -+ protected PrioritisedExecutor.Priority getScheduledPriority() { -+ final LoadDataFromDiskTask task = this.task; -+ return RegionFileIOThread.getPriority(task.world, task.chunkX, task.chunkZ, task.type); -+ } -+ -+ @Override -+ protected void scheduleTask(final PrioritisedExecutor.Priority priority) { -+ final LoadDataFromDiskTask task = this.task; -+ final BiConsumer consumer = (final CompoundTag data, final Throwable thr) -> { -+ // because cancelScheduled() cannot actually stop this task from executing in every case, we need -+ // to mark complete here to ensure we do not double complete -+ if (LoadDataPriorityHolder.this.markExecuting()) { -+ LoadDataPriorityHolder.this.task.complete(data, thr); -+ } // else: cancelled -+ }; -+ task.dataLoadTask = RegionFileIOThread.loadDataAsync( -+ task.world, task.chunkX, task.chunkZ, task.type, consumer, -+ priority.isHigherPriority(PrioritisedExecutor.Priority.NORMAL), priority -+ ); -+ if (this.isMarkedExecuted()) { -+ // if we are marked as completed, it could be: -+ // 1. we were cancelled -+ // 2. the consumer was completed -+ // in the 2nd case, cancel() does nothing -+ // in the 1st case, we ensure cancel() is called as it is possible for the cancelling thread -+ // to miss the field write here -+ task.dataLoadTask.cancel(); -+ } -+ } -+ -+ @Override -+ protected void lowerPriorityScheduled(final PrioritisedExecutor.Priority priority) { -+ final LoadDataFromDiskTask task = this.task; -+ RegionFileIOThread.lowerPriority(task.world, task.chunkX, task.chunkZ, task.type, priority); -+ } -+ -+ @Override -+ protected void setPriorityScheduled(final PrioritisedExecutor.Priority priority) { -+ final LoadDataFromDiskTask task = this.task; -+ RegionFileIOThread.setPriority(task.world, task.chunkX, task.chunkZ, task.type, priority); -+ } -+ -+ @Override -+ protected void raisePriorityScheduled(final PrioritisedExecutor.Priority priority) { -+ final LoadDataFromDiskTask task = this.task; -+ RegionFileIOThread.raisePriority(task.world, task.chunkX, task.chunkZ, task.type, priority); -+ } -+ } -+ */ -+ } -+} -diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/NewChunkHolder.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/NewChunkHolder.java -new file mode 100644 -index 0000000000000000000000000000000000000000..56b07a3306e5735816c8d89601b519cb0db6379a ---- /dev/null -+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/NewChunkHolder.java -@@ -0,0 +1,2106 @@ -+package io.papermc.paper.chunk.system.scheduling; -+ -+import ca.spottedleaf.concurrentutil.completable.Completable; -+import ca.spottedleaf.concurrentutil.executor.Cancellable; -+import ca.spottedleaf.concurrentutil.executor.standard.DelayedPrioritisedTask; -+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; -+import ca.spottedleaf.concurrentutil.lock.ReentrantAreaLock; -+import ca.spottedleaf.concurrentutil.util.ConcurrentUtil; -+import com.google.gson.JsonArray; -+import com.google.gson.JsonElement; -+import com.google.gson.JsonObject; -+import com.google.gson.JsonPrimitive; -+import com.mojang.logging.LogUtils; -+import io.papermc.paper.chunk.system.io.RegionFileIOThread; -+import io.papermc.paper.chunk.system.poi.PoiChunk; -+import io.papermc.paper.util.CoordinateUtils; -+import io.papermc.paper.util.TickThread; -+import io.papermc.paper.util.WorldUtil; -+import io.papermc.paper.world.ChunkEntitySlices; -+import it.unimi.dsi.fastutil.objects.Reference2ObjectLinkedOpenHashMap; -+import it.unimi.dsi.fastutil.objects.Reference2ObjectMap; -+import it.unimi.dsi.fastutil.objects.Reference2ObjectOpenHashMap; -+import it.unimi.dsi.fastutil.objects.ReferenceLinkedOpenHashSet; -+import net.minecraft.nbt.CompoundTag; -+import net.minecraft.server.level.ChunkHolder; -+import net.minecraft.server.level.ChunkLevel; -+import net.minecraft.server.level.FullChunkStatus; -+import net.minecraft.server.level.ServerLevel; -+import net.minecraft.server.level.TicketType; -+import net.minecraft.world.entity.Entity; -+import net.minecraft.world.level.ChunkPos; -+import net.minecraft.world.level.chunk.ChunkAccess; -+import net.minecraft.world.level.chunk.status.ChunkStatus; -+import net.minecraft.world.level.chunk.ImposterProtoChunk; -+import net.minecraft.world.level.chunk.LevelChunk; -+import net.minecraft.world.level.chunk.storage.ChunkSerializer; -+import net.minecraft.world.level.chunk.storage.EntityStorage; -+import org.slf4j.Logger; -+import java.lang.invoke.VarHandle; -+import java.util.ArrayList; -+import java.util.Iterator; -+import java.util.List; -+import java.util.Map; -+import java.util.Objects; -+import java.util.concurrent.atomic.AtomicBoolean; -+import java.util.function.Consumer; -+ -+public final class NewChunkHolder { -+ -+ private static final Logger LOGGER = LogUtils.getClassLogger(); -+ -+ public static final Thread.UncaughtExceptionHandler CHUNKSYSTEM_UNCAUGHT_EXCEPTION_HANDLER = new Thread.UncaughtExceptionHandler() { -+ @Override -+ public void uncaughtException(final Thread thread, final Throwable throwable) { -+ if (!(throwable instanceof ThreadDeath)) { -+ LOGGER.error("Uncaught exception in thread " + thread.getName(), throwable); -+ } -+ } -+ }; -+ -+ public final ServerLevel world; -+ public final int chunkX; -+ public final int chunkZ; -+ -+ public final ChunkTaskScheduler scheduler; -+ -+ // load/unload state -+ -+ // chunk data state -+ -+ private ChunkEntitySlices entityChunk; -+ // entity chunk that is loaded, but not yet deserialized -+ private CompoundTag pendingEntityChunk; -+ -+ ChunkEntitySlices loadInEntityChunk(final boolean transientChunk) { -+ TickThread.ensureTickThread(this.world, this.chunkX, this.chunkZ, "Cannot sync load entity data off-main"); -+ final CompoundTag entityChunk; -+ final ChunkEntitySlices ret; -+ final ReentrantAreaLock.Node schedulingLock = this.scheduler.schedulingLockArea.lock(this.chunkX, this.chunkZ); -+ try { -+ if (this.entityChunk != null && (transientChunk || !this.entityChunk.isTransient())) { -+ return this.entityChunk; -+ } -+ final CompoundTag pendingEntityChunk = this.pendingEntityChunk; -+ if (!transientChunk && pendingEntityChunk == null) { -+ throw new IllegalStateException("Must load entity data from disk before loading in the entity chunk!"); -+ } -+ -+ if (this.entityChunk == null) { -+ ret = this.entityChunk = new ChunkEntitySlices( -+ this.world, this.chunkX, this.chunkZ, this.getChunkStatus(), -+ WorldUtil.getMinSection(this.world), WorldUtil.getMaxSection(this.world) -+ ); -+ -+ ret.setTransient(transientChunk); -+ -+ this.world.getEntityLookup().entitySectionLoad(this.chunkX, this.chunkZ, ret); -+ } else { -+ // transientChunk = false here -+ ret = this.entityChunk; -+ this.entityChunk.setTransient(false); -+ } -+ -+ if (!transientChunk) { -+ this.pendingEntityChunk = null; -+ entityChunk = pendingEntityChunk == EMPTY_ENTITY_CHUNK ? null : pendingEntityChunk; -+ } else { -+ entityChunk = null; -+ } -+ } finally { -+ this.scheduler.schedulingLockArea.unlock(schedulingLock); -+ } -+ -+ if (!transientChunk) { -+ if (entityChunk != null) { -+ final List entities = EntityStorage.readEntities(this.world, entityChunk); -+ -+ this.world.getEntityLookup().addEntityChunkEntities(entities, new ChunkPos(this.chunkX, this.chunkZ)); -+ } -+ } -+ -+ return ret; -+ } -+ -+ // needed to distinguish whether the entity chunk has been read from disk but is empty or whether it has _not_ -+ // been read from disk -+ private static final CompoundTag EMPTY_ENTITY_CHUNK = new CompoundTag(); -+ -+ private ChunkLoadTask.EntityDataLoadTask entityDataLoadTask; -+ // note: if entityDataLoadTask is cancelled, but on its completion entityDataLoadTaskWaiters.size() != 0, -+ // then the task is rescheduled -+ private List entityDataLoadTaskWaiters; -+ -+ public ChunkLoadTask.EntityDataLoadTask getEntityDataLoadTask() { -+ return this.entityDataLoadTask; -+ } -+ -+ // must hold schedule lock for the two below functions -+ -+ // returns only if the data has been loaded from disk, DOES NOT relate to whether it has been deserialized -+ // or added into the world (or even into entityChunk) -+ public boolean isEntityChunkNBTLoaded() { -+ return (this.entityChunk != null && !this.entityChunk.isTransient()) || this.pendingEntityChunk != null; -+ } -+ -+ private void completeEntityLoad(final GenericDataLoadTask.TaskResult result) { -+ final List completeWaiters; -+ ChunkLoadTask.EntityDataLoadTask entityDataLoadTask = null; -+ boolean scheduleEntityTask = false; -+ ReentrantAreaLock.Node schedulingLock = this.scheduler.schedulingLockArea.lock(this.chunkX, this.chunkZ); -+ try { -+ final List waiters = this.entityDataLoadTaskWaiters; -+ this.entityDataLoadTask = null; -+ if (result != null) { -+ this.entityDataLoadTaskWaiters = null; -+ this.pendingEntityChunk = result.left() == null ? EMPTY_ENTITY_CHUNK : result.left(); -+ if (result.right() != null) { -+ LOGGER.error("Unhandled entity data load exception, data data will be lost: ", result.right()); -+ } -+ -+ for (final GenericDataLoadTaskCallback callback : waiters) { -+ callback.markCompleted(); -+ } -+ -+ completeWaiters = waiters; -+ } else { -+ // cancelled -+ completeWaiters = null; -+ -+ // need to re-schedule? -+ if (waiters.isEmpty()) { -+ this.entityDataLoadTaskWaiters = null; -+ // no tasks to schedule _for_ -+ } else { -+ entityDataLoadTask = this.entityDataLoadTask = new ChunkLoadTask.EntityDataLoadTask( -+ this.scheduler, this.world, this.chunkX, this.chunkZ, this.getEffectivePriority() -+ ); -+ entityDataLoadTask.addCallback(this::completeEntityLoad); -+ // need one schedule() per waiter -+ for (final GenericDataLoadTaskCallback callback : waiters) { -+ scheduleEntityTask |= entityDataLoadTask.schedule(true); -+ } -+ } -+ } -+ } finally { -+ this.scheduler.schedulingLockArea.unlock(schedulingLock); -+ } -+ -+ if (scheduleEntityTask) { -+ entityDataLoadTask.scheduleNow(); -+ } -+ -+ // avoid holding the scheduling lock while completing -+ if (completeWaiters != null) { -+ for (final GenericDataLoadTaskCallback callback : completeWaiters) { -+ callback.acceptCompleted(result); -+ } -+ } -+ -+ schedulingLock = this.scheduler.schedulingLockArea.lock(this.chunkX, this.chunkZ); -+ try { -+ this.checkUnload(); -+ } finally { -+ this.scheduler.schedulingLockArea.unlock(schedulingLock); -+ } -+ } -+ -+ // note: it is guaranteed that the consumer cannot be called for the entirety that the schedule lock is held -+ // however, when the consumer is invoked, it will hold the schedule lock -+ public GenericDataLoadTaskCallback getOrLoadEntityData(final Consumer> consumer) { -+ if (this.isEntityChunkNBTLoaded()) { -+ throw new IllegalStateException("Cannot load entity data, it is already loaded"); -+ } -+ // why not just acquire the lock? because the caller NEEDS to call isEntityChunkNBTLoaded before this! -+ if (!this.scheduler.schedulingLockArea.isHeldByCurrentThread(this.chunkX, this.chunkZ)) { -+ throw new IllegalStateException("Must hold scheduling lock"); -+ } -+ -+ final GenericDataLoadTaskCallback ret = new EntityDataLoadTaskCallback((Consumer)consumer, this); -+ -+ if (this.entityDataLoadTask == null) { -+ this.entityDataLoadTask = new ChunkLoadTask.EntityDataLoadTask( -+ this.scheduler, this.world, this.chunkX, this.chunkZ, this.getEffectivePriority() -+ ); -+ this.entityDataLoadTask.addCallback(this::completeEntityLoad); -+ this.entityDataLoadTaskWaiters = new ArrayList<>(); -+ } -+ this.entityDataLoadTaskWaiters.add(ret); -+ if (this.entityDataLoadTask.schedule(true)) { -+ ret.schedule = this.entityDataLoadTask; -+ } -+ this.checkUnload(); -+ -+ return ret; -+ } -+ -+ private static final class EntityDataLoadTaskCallback extends GenericDataLoadTaskCallback { -+ -+ public EntityDataLoadTaskCallback(final Consumer> consumer, final NewChunkHolder chunkHolder) { -+ super(consumer, chunkHolder); -+ } -+ -+ @Override -+ void internalCancel() { -+ this.chunkHolder.entityDataLoadTaskWaiters.remove(this); -+ this.chunkHolder.entityDataLoadTask.cancel(); -+ } -+ } -+ -+ private PoiChunk poiChunk; -+ -+ private ChunkLoadTask.PoiDataLoadTask poiDataLoadTask; -+ // note: if entityDataLoadTask is cancelled, but on its completion entityDataLoadTaskWaiters.size() != 0, -+ // then the task is rescheduled -+ private List poiDataLoadTaskWaiters; -+ -+ public ChunkLoadTask.PoiDataLoadTask getPoiDataLoadTask() { -+ return this.poiDataLoadTask; -+ } -+ -+ // must hold schedule lock for the two below functions -+ -+ public boolean isPoiChunkLoaded() { -+ return this.poiChunk != null; -+ } -+ -+ private void completePoiLoad(final GenericDataLoadTask.TaskResult result) { -+ final List completeWaiters; -+ ChunkLoadTask.PoiDataLoadTask poiDataLoadTask = null; -+ boolean schedulePoiTask = false; -+ ReentrantAreaLock.Node schedulingLock = this.scheduler.schedulingLockArea.lock(this.chunkX, this.chunkZ); -+ try { -+ final List waiters = this.poiDataLoadTaskWaiters; -+ this.poiDataLoadTask = null; -+ if (result != null) { -+ this.poiDataLoadTaskWaiters = null; -+ this.poiChunk = result.left(); -+ if (result.right() != null) { -+ LOGGER.error("Unhandled poi load exception, poi data will be lost: ", result.right()); -+ } -+ -+ for (final GenericDataLoadTaskCallback callback : waiters) { -+ callback.markCompleted(); -+ } -+ -+ completeWaiters = waiters; -+ } else { -+ // cancelled -+ completeWaiters = null; -+ -+ // need to re-schedule? -+ if (waiters.isEmpty()) { -+ this.poiDataLoadTaskWaiters = null; -+ // no tasks to schedule _for_ -+ } else { -+ poiDataLoadTask = this.poiDataLoadTask = new ChunkLoadTask.PoiDataLoadTask( -+ this.scheduler, this.world, this.chunkX, this.chunkZ, this.getEffectivePriority() -+ ); -+ poiDataLoadTask.addCallback(this::completePoiLoad); -+ // need one schedule() per waiter -+ for (final GenericDataLoadTaskCallback callback : waiters) { -+ schedulePoiTask |= poiDataLoadTask.schedule(true); -+ } -+ } -+ } -+ } finally { -+ this.scheduler.schedulingLockArea.unlock(schedulingLock); -+ } -+ -+ if (schedulePoiTask) { -+ poiDataLoadTask.scheduleNow(); -+ } -+ -+ // avoid holding the scheduling lock while completing -+ if (completeWaiters != null) { -+ for (final GenericDataLoadTaskCallback callback : completeWaiters) { -+ callback.acceptCompleted(result); -+ } -+ } -+ schedulingLock = this.scheduler.schedulingLockArea.lock(this.chunkX, this.chunkZ); -+ try { -+ this.checkUnload(); -+ } finally { -+ this.scheduler.schedulingLockArea.unlock(schedulingLock); -+ } -+ } -+ -+ // note: it is guaranteed that the consumer cannot be called for the entirety that the schedule lock is held -+ // however, when the consumer is invoked, it will hold the schedule lock -+ public GenericDataLoadTaskCallback getOrLoadPoiData(final Consumer> consumer) { -+ if (this.isPoiChunkLoaded()) { -+ throw new IllegalStateException("Cannot load poi data, it is already loaded"); -+ } -+ // why not just acquire the lock? because the caller NEEDS to call isPoiChunkLoaded before this! -+ if (!this.scheduler.schedulingLockArea.isHeldByCurrentThread(this.chunkX, this.chunkZ)) { -+ throw new IllegalStateException("Must hold scheduling lock"); -+ } -+ -+ final GenericDataLoadTaskCallback ret = new PoiDataLoadTaskCallback((Consumer)consumer, this); -+ -+ if (this.poiDataLoadTask == null) { -+ this.poiDataLoadTask = new ChunkLoadTask.PoiDataLoadTask( -+ this.scheduler, this.world, this.chunkX, this.chunkZ, this.getEffectivePriority() -+ ); -+ this.poiDataLoadTask.addCallback(this::completePoiLoad); -+ this.poiDataLoadTaskWaiters = new ArrayList<>(); -+ } -+ this.poiDataLoadTaskWaiters.add(ret); -+ if (this.poiDataLoadTask.schedule(true)) { -+ ret.schedule = this.poiDataLoadTask; -+ } -+ this.checkUnload(); -+ -+ return ret; -+ } -+ -+ private static final class PoiDataLoadTaskCallback extends GenericDataLoadTaskCallback { -+ -+ public PoiDataLoadTaskCallback(final Consumer> consumer, final NewChunkHolder chunkHolder) { -+ super(consumer, chunkHolder); -+ } -+ -+ @Override -+ void internalCancel() { -+ this.chunkHolder.poiDataLoadTaskWaiters.remove(this); -+ this.chunkHolder.poiDataLoadTask.cancel(); -+ } -+ } -+ -+ public static abstract class GenericDataLoadTaskCallback implements Cancellable { -+ -+ protected final Consumer> consumer; -+ protected final NewChunkHolder chunkHolder; -+ protected boolean completed; -+ protected GenericDataLoadTask schedule; -+ protected final AtomicBoolean scheduled = new AtomicBoolean(); -+ -+ public GenericDataLoadTaskCallback(final Consumer> consumer, -+ final NewChunkHolder chunkHolder) { -+ this.consumer = consumer; -+ this.chunkHolder = chunkHolder; -+ } -+ -+ public void schedule() { -+ if (this.scheduled.getAndSet(true)) { -+ throw new IllegalStateException("Double calling schedule()"); -+ } -+ if (this.schedule != null) { -+ this.schedule.scheduleNow(); -+ this.schedule = null; -+ } -+ } -+ -+ boolean isCompleted() { -+ return this.completed; -+ } -+ -+ // must hold scheduling lock -+ private boolean setCompleted() { -+ if (this.completed) { -+ return false; -+ } -+ return this.completed = true; -+ } -+ -+ // must hold scheduling lock -+ void markCompleted() { -+ if (this.completed) { -+ throw new IllegalStateException("May not be completed here"); -+ } -+ this.completed = true; -+ } -+ -+ void acceptCompleted(final GenericDataLoadTask.TaskResult result) { -+ if (result != null) { -+ if (this.completed) { -+ this.consumer.accept(result); -+ } else { -+ throw new IllegalStateException("Cannot be uncompleted at this point"); -+ } -+ } else { -+ throw new NullPointerException("Result cannot be null (cancelled)"); -+ } -+ } -+ -+ // holds scheduling lock -+ abstract void internalCancel(); -+ -+ @Override -+ public boolean cancel() { -+ final NewChunkHolder holder = this.chunkHolder; // Folia - use area based lock to reduce contention -+ final ReentrantAreaLock.Node schedulingLock = holder.scheduler.schedulingLockArea.lock(holder.chunkX, holder.chunkZ); -+ try { -+ if (!this.completed) { -+ this.completed = true; -+ this.internalCancel(); -+ return true; -+ } -+ return false; -+ } finally { -+ holder.scheduler.schedulingLockArea.unlock(schedulingLock); -+ } -+ } -+ } -+ -+ private ChunkAccess currentChunk; -+ -+ // generation status state -+ -+ /** -+ * Current status the chunk has been brought up to by the chunk system. null indicates no work at all -+ */ -+ private ChunkStatus currentGenStatus; -+ -+ // This allows unsynchronised access to the chunk and last gen status -+ private volatile ChunkCompletion lastChunkCompletion; -+ -+ public ChunkCompletion getLastChunkCompletion() { -+ return this.lastChunkCompletion; -+ } -+ -+ public static final record ChunkCompletion(ChunkAccess chunk, ChunkStatus genStatus) {}; -+ -+ /** -+ * The target final chunk status the chunk system will bring the chunk to. -+ */ -+ private ChunkStatus requestedGenStatus; -+ -+ private ChunkProgressionTask generationTask; -+ private ChunkStatus generationTaskStatus; -+ -+ /** -+ * contains the neighbours that this chunk generation is blocking on -+ */ -+ protected final ReferenceLinkedOpenHashSet neighboursBlockingGenTask = new ReferenceLinkedOpenHashSet<>(4); -+ -+ /** -+ * map of ChunkHolder -> Required Status for this chunk -+ */ -+ protected final Reference2ObjectLinkedOpenHashMap neighboursWaitingForUs = new Reference2ObjectLinkedOpenHashMap<>(); -+ -+ public void addGenerationBlockingNeighbour(final NewChunkHolder neighbour) { -+ this.neighboursBlockingGenTask.add(neighbour); -+ } -+ -+ public void addWaitingNeighbour(final NewChunkHolder neighbour, final ChunkStatus requiredStatus) { -+ final boolean wasEmpty = this.neighboursWaitingForUs.isEmpty(); -+ this.neighboursWaitingForUs.put(neighbour, requiredStatus); -+ if (wasEmpty) { -+ this.checkUnload(); -+ } -+ } -+ -+ // priority state -+ -+ // the target priority for this chunk to generate at -+ // TODO this will screw over scheduling at lower priorities to neighbours, fix -+ private PrioritisedExecutor.Priority priority = PrioritisedExecutor.Priority.NORMAL; -+ private boolean priorityLocked; -+ -+ // the priority neighbouring chunks have requested this chunk generate at -+ private PrioritisedExecutor.Priority neighbourRequestedPriority = PrioritisedExecutor.Priority.IDLE; -+ -+ public PrioritisedExecutor.Priority getEffectivePriority() { -+ return PrioritisedExecutor.Priority.max(this.priority, this.neighbourRequestedPriority); -+ } -+ -+ protected void recalculateNeighbourRequestedPriority() { -+ if (this.neighboursWaitingForUs.isEmpty()) { -+ this.neighbourRequestedPriority = PrioritisedExecutor.Priority.IDLE; -+ return; -+ } -+ -+ PrioritisedExecutor.Priority max = PrioritisedExecutor.Priority.IDLE; -+ -+ for (final NewChunkHolder holder : this.neighboursWaitingForUs.keySet()) { -+ final PrioritisedExecutor.Priority neighbourPriority = holder.getEffectivePriority(); -+ if (neighbourPriority.isHigherPriority(max)) { -+ max = neighbourPriority; -+ } -+ } -+ -+ final PrioritisedExecutor.Priority current = this.getEffectivePriority(); -+ this.neighbourRequestedPriority = max; -+ final PrioritisedExecutor.Priority next = this.getEffectivePriority(); -+ -+ if (current == next) { -+ return; -+ } -+ -+ // our effective priority has changed, so change our task -+ if (this.generationTask != null) { -+ this.generationTask.setPriority(next); -+ } -+ -+ // now propagate this to our neighbours -+ this.recalculateNeighbourPriorities(); -+ } -+ -+ public void recalculateNeighbourPriorities() { -+ for (final NewChunkHolder holder : this.neighboursBlockingGenTask) { -+ holder.recalculateNeighbourRequestedPriority(); -+ } -+ } -+ -+ // must hold scheduling lock -+ public void raisePriority(final PrioritisedExecutor.Priority priority) { -+ if (this.priority != null && this.priority.isHigherOrEqualPriority(priority)) { -+ return; -+ } -+ this.setPriority(priority); -+ } -+ -+ private void lockPriority() { -+ this.priority = PrioritisedExecutor.Priority.NORMAL; -+ this.priorityLocked = true; -+ } -+ -+ // must hold scheduling lock -+ public void setPriority(final PrioritisedExecutor.Priority priority) { -+ if (this.priorityLocked) { -+ return; -+ } -+ final PrioritisedExecutor.Priority old = this.getEffectivePriority(); -+ this.priority = priority; -+ final PrioritisedExecutor.Priority newPriority = this.getEffectivePriority(); -+ -+ if (old != newPriority) { -+ if (this.generationTask != null) { -+ this.generationTask.setPriority(newPriority); -+ } -+ } -+ -+ this.recalculateNeighbourPriorities(); -+ } -+ -+ // must hold scheduling lock -+ public void lowerPriority(final PrioritisedExecutor.Priority priority) { -+ if (this.priority != null && this.priority.isLowerOrEqualPriority(priority)) { -+ return; -+ } -+ this.setPriority(priority); -+ } -+ -+ // error handling state -+ private ChunkStatus failedGenStatus; -+ private Throwable genTaskException; -+ private Thread genTaskFailedThread; -+ -+ private boolean failedLightUpdate; -+ -+ public void failedLightUpdate() { -+ this.failedLightUpdate = true; -+ } -+ -+ public boolean hasFailedGeneration() { -+ return this.genTaskException != null; -+ } -+ -+ // ticket level state -+ private int oldTicketLevel = ChunkLevel.MAX_LEVEL + 1; -+ private int currentTicketLevel = ChunkLevel.MAX_LEVEL + 1; -+ -+ public int getTicketLevel() { -+ return this.currentTicketLevel; -+ } -+ -+ public final ChunkHolder vanillaChunkHolder; -+ -+ public NewChunkHolder(final ServerLevel world, final int chunkX, final int chunkZ, final ChunkTaskScheduler scheduler) { -+ this.world = world; -+ this.chunkX = chunkX; -+ this.chunkZ = chunkZ; -+ this.scheduler = scheduler; -+ this.vanillaChunkHolder = new ChunkHolder(new ChunkPos(chunkX, chunkZ), world, world.getLightEngine(), world.chunkSource.chunkMap, this); -+ } -+ -+ protected ImposterProtoChunk wrappedChunkForNeighbour; -+ -+ // holds scheduling lock -+ public ChunkAccess getChunkForNeighbourAccess() { -+ // Vanilla overrides the status futures with an imposter chunk to prevent writes to full chunks -+ // But we don't store per-status futures, so we need this hack -+ if (this.wrappedChunkForNeighbour != null) { -+ return this.wrappedChunkForNeighbour; -+ } -+ final ChunkAccess ret = this.currentChunk; -+ return ret instanceof LevelChunk fullChunk ? this.wrappedChunkForNeighbour = new ImposterProtoChunk(fullChunk, false) : ret; -+ } -+ -+ public ChunkAccess getCurrentChunk() { -+ return this.currentChunk; -+ } -+ -+ int getCurrentTicketLevel() { -+ return this.currentTicketLevel; -+ } -+ -+ void updateTicketLevel(final int toLevel) { -+ this.currentTicketLevel = toLevel; -+ } -+ -+ private int totalNeighboursUsingThisChunk = 0; -+ -+ // holds schedule lock -+ public void addNeighbourUsingChunk() { -+ final int now = ++this.totalNeighboursUsingThisChunk; -+ -+ if (now == 1) { -+ this.checkUnload(); -+ } -+ } -+ -+ // holds schedule lock -+ public void removeNeighbourUsingChunk() { -+ final int now = --this.totalNeighboursUsingThisChunk; -+ -+ if (now == 0) { -+ this.checkUnload(); -+ } -+ -+ if (now < 0) { -+ throw new IllegalStateException("Neighbours using this chunk cannot be negative"); -+ } -+ } -+ -+ // must hold scheduling lock -+ // returns string reason for why chunk should remain loaded, null otherwise -+ public final String isSafeToUnload() { -+ // is ticket level below threshold? -+ if (this.oldTicketLevel <= ChunkHolderManager.MAX_TICKET_LEVEL) { -+ return "ticket_level"; -+ } -+ -+ // are we being used by another chunk for generation? -+ if (this.totalNeighboursUsingThisChunk != 0) { -+ return "neighbours_generating"; -+ } -+ -+ // are we going to be used by another chunk for generation? -+ if (!this.neighboursWaitingForUs.isEmpty()) { -+ return "neighbours_waiting"; -+ } -+ -+ // chunk must be marked inaccessible (i.e unloaded to plugins) -+ if (this.getChunkStatus() != FullChunkStatus.INACCESSIBLE) { -+ return "fullchunkstatus"; -+ } -+ -+ // are we currently generating anything, or have requested generation? -+ if (this.generationTask != null) { -+ return "generating"; -+ } -+ if (this.requestedGenStatus != null) { -+ return "requested_generation"; -+ } -+ -+ // entity data requested? -+ if (this.entityDataLoadTask != null) { -+ return "entity_data_requested"; -+ } -+ -+ // poi data requested? -+ if (this.poiDataLoadTask != null) { -+ return "poi_data_requested"; -+ } -+ -+ // are we pending serialization? -+ if (this.entityDataUnload != null) { -+ return "entity_serialization"; -+ } -+ if (this.poiDataUnload != null) { -+ return "poi_serialization"; -+ } -+ if (this.chunkDataUnload != null) { -+ return "chunk_serialization"; -+ } -+ -+ // Note: light tasks do not need a check, as they add a ticket. -+ -+ // nothing is using this chunk, so it should be unloaded -+ return null; -+ } -+ -+ /** Unloaded from chunk map */ -+ boolean killed; -+ -+ // must hold scheduling lock -+ private void checkUnload() { -+ if (this.killed) { -+ return; -+ } -+ if (this.isSafeToUnload() == null) { -+ // ensure in unload queue -+ this.scheduler.chunkHolderManager.unloadQueue.addChunk(this.chunkX, this.chunkZ); -+ } else { -+ // ensure not in unload queue -+ this.scheduler.chunkHolderManager.unloadQueue.removeChunk(this.chunkX, this.chunkZ); -+ } -+ } -+ -+ static final record UnloadState(NewChunkHolder holder, ChunkAccess chunk, ChunkEntitySlices entityChunk, PoiChunk poiChunk) {}; -+ -+ // note: these are completed with null to indicate that no write occurred -+ // they are also completed with null to indicate a null write occurred -+ private UnloadTask chunkDataUnload; -+ private UnloadTask entityDataUnload; -+ private UnloadTask poiDataUnload; -+ -+ public static final record UnloadTask(Completable completable, DelayedPrioritisedTask task) {} -+ -+ public UnloadTask getUnloadTask(final RegionFileIOThread.RegionFileType type) { -+ switch (type) { -+ case CHUNK_DATA: -+ return this.chunkDataUnload; -+ case ENTITY_DATA: -+ return this.entityDataUnload; -+ case POI_DATA: -+ return this.poiDataUnload; -+ default: -+ throw new IllegalStateException("Unknown regionfile type " + type); -+ } -+ } -+ -+ private UnloadState unloadState; -+ -+ // holds schedule lock -+ UnloadState unloadStage1() { -+ // because we hold the scheduling lock, we cannot actually unload anything -+ // so we need to null this chunk's state -+ ChunkAccess chunk = this.currentChunk; -+ ChunkEntitySlices entityChunk = this.entityChunk; -+ PoiChunk poiChunk = this.poiChunk; -+ // chunk state -+ this.currentChunk = null; -+ this.currentGenStatus = null; -+ this.wrappedChunkForNeighbour = null; -+ this.lastChunkCompletion = null; -+ // entity chunk state -+ this.entityChunk = null; -+ this.pendingEntityChunk = null; -+ -+ // poi chunk state -+ this.poiChunk = null; -+ -+ // priority state -+ this.priorityLocked = false; -+ -+ if (chunk != null) { -+ this.chunkDataUnload = new UnloadTask(new Completable<>(), new DelayedPrioritisedTask(PrioritisedExecutor.Priority.NORMAL)); -+ } -+ if (poiChunk != null) { -+ this.poiDataUnload = new UnloadTask(new Completable<>(), null); -+ } -+ if (entityChunk != null) { -+ this.entityDataUnload = new UnloadTask(new Completable<>(), null); -+ } -+ -+ return this.unloadState = (chunk != null || entityChunk != null || poiChunk != null) ? new UnloadState(this, chunk, entityChunk, poiChunk) : null; -+ } -+ -+ // data is null if failed or does not need to be saved -+ void completeAsyncChunkDataSave(final CompoundTag data) { -+ if (data != null) { -+ RegionFileIOThread.scheduleSave(this.world, this.chunkX, this.chunkZ, data, RegionFileIOThread.RegionFileType.CHUNK_DATA); -+ } -+ this.chunkDataUnload.completable().complete(data); -+ final ReentrantAreaLock.Node schedulingLock = this.scheduler.schedulingLockArea.lock(this.chunkX, this.chunkZ); -+ try { -+ // can only write to these fields while holding the schedule lock -+ this.chunkDataUnload = null; -+ this.checkUnload(); -+ } finally { -+ this.scheduler.schedulingLockArea.unlock(schedulingLock); -+ } -+ } -+ -+ void unloadStage2(final UnloadState state) { -+ this.unloadState = null; -+ final ChunkAccess chunk = state.chunk(); -+ final ChunkEntitySlices entityChunk = state.entityChunk(); -+ final PoiChunk poiChunk = state.poiChunk(); -+ -+ final boolean shouldLevelChunkNotSave = (chunk instanceof LevelChunk levelChunk && levelChunk.mustNotSave); -+ -+ // unload chunk data -+ if (chunk != null) { -+ if (chunk instanceof LevelChunk levelChunk) { -+ levelChunk.setLoaded(false); -+ } -+ -+ if (!shouldLevelChunkNotSave) { -+ this.saveChunk(chunk, true); -+ } else { -+ this.completeAsyncChunkDataSave(null); -+ } -+ -+ if (chunk instanceof LevelChunk levelChunk) { -+ this.world.unload(levelChunk); -+ } -+ } -+ -+ // unload entity data -+ if (entityChunk != null) { -+ this.saveEntities(entityChunk, true); -+ // yes this is a hack to pass the compound tag through... -+ final CompoundTag lastEntityUnload = this.lastEntityUnload; -+ this.lastEntityUnload = null; -+ -+ if (entityChunk.unload()) { -+ final ReentrantAreaLock.Node schedulingLock = this.scheduler.schedulingLockArea.lock(this.chunkX, this.chunkZ); -+ try { -+ entityChunk.setTransient(true); -+ this.entityChunk = entityChunk; -+ } finally { -+ this.scheduler.schedulingLockArea.unlock(schedulingLock); -+ } -+ } else { -+ this.world.getEntityLookup().entitySectionUnload(this.chunkX, this.chunkZ); -+ } -+ // we need to delay the callback until after determining transience, otherwise a potential loader could -+ // set entityChunk before we do -+ this.entityDataUnload.completable().complete(lastEntityUnload); -+ } -+ -+ // unload poi data -+ if (poiChunk != null) { -+ if (poiChunk.isDirty() && !shouldLevelChunkNotSave) { -+ this.savePOI(poiChunk, true); -+ } else { -+ this.poiDataUnload.completable().complete(null); -+ } -+ -+ if (poiChunk.isLoaded()) { -+ this.world.getPoiManager().onUnload(CoordinateUtils.getChunkKey(this.chunkX, this.chunkZ)); -+ } -+ } -+ } -+ -+ boolean unloadStage3() { -+ // can only write to these while holding the schedule lock, and we instantly complete them in stage2 -+ this.poiDataUnload = null; -+ this.entityDataUnload = null; -+ -+ // we need to check if anything has been loaded in the meantime (or if we have transient entities) -+ if (this.entityChunk != null || this.poiChunk != null || this.currentChunk != null) { -+ return false; -+ } -+ -+ return this.isSafeToUnload() == null; -+ } -+ -+ private void cancelGenTask() { -+ if (this.generationTask != null) { -+ this.generationTask.cancel(); -+ } else { -+ // otherwise, we are blocking on neighbours, so remove them -+ if (!this.neighboursBlockingGenTask.isEmpty()) { -+ for (final NewChunkHolder neighbour : this.neighboursBlockingGenTask) { -+ if (neighbour.neighboursWaitingForUs.remove(this) == null) { -+ throw new IllegalStateException("Corrupt state"); -+ } -+ if (neighbour.neighboursWaitingForUs.isEmpty()) { -+ neighbour.checkUnload(); -+ } -+ } -+ this.neighboursBlockingGenTask.clear(); -+ this.checkUnload(); -+ } -+ } -+ } -+ -+ // holds: ticket level update lock -+ // holds: schedule lock -+ public void processTicketLevelUpdate(final List scheduledTasks, final List changedLoadStatus) { -+ final int oldLevel = this.oldTicketLevel; -+ final int newLevel = this.currentTicketLevel; -+ -+ if (oldLevel == newLevel) { -+ return; -+ } -+ -+ this.oldTicketLevel = newLevel; -+ -+ final FullChunkStatus oldState = ChunkLevel.fullStatus(oldLevel); -+ final FullChunkStatus newState = ChunkLevel.fullStatus(newLevel); -+ final boolean oldUnloaded = oldLevel > ChunkHolderManager.MAX_TICKET_LEVEL; -+ final boolean newUnloaded = newLevel > ChunkHolderManager.MAX_TICKET_LEVEL; -+ -+ final ChunkStatus maxGenerationStatusOld = ChunkLevel.generationStatus(oldLevel); -+ final ChunkStatus maxGenerationStatusNew = ChunkLevel.generationStatus(newLevel); -+ -+ // check for cancellations from downgrading ticket level -+ if (this.requestedGenStatus != null && !newState.isOrAfter(FullChunkStatus.FULL) && newLevel > oldLevel) { -+ // note: cancel() may invoke onChunkGenComplete synchronously here -+ if (newUnloaded) { -+ // need to cancel all tasks -+ // note: requested status must be set to null here before cancellation, to indicate to the -+ // completion logic that we do not want rescheduling to occur -+ this.requestedGenStatus = null; -+ this.cancelGenTask(); -+ } else { -+ final ChunkStatus toCancel = maxGenerationStatusNew.getNextStatus(); -+ final ChunkStatus currentRequestedStatus = this.requestedGenStatus; -+ -+ if (currentRequestedStatus.isOrAfter(toCancel)) { -+ // we do have to cancel something here -+ // clamp requested status to the maximum -+ if (this.currentGenStatus != null && this.currentGenStatus.isOrAfter(maxGenerationStatusNew)) { -+ // already generated to status, so we must cancel -+ this.requestedGenStatus = null; -+ this.cancelGenTask(); -+ } else { -+ // not generated to status, so we may have to cancel -+ // note: gen task is always 1 status above current gen status if not null -+ this.requestedGenStatus = maxGenerationStatusNew; -+ if (this.generationTaskStatus != null && this.generationTaskStatus.isOrAfter(toCancel)) { -+ // TOOD is this even possible? i don't think so -+ throw new IllegalStateException("?????"); -+ } -+ } -+ } -+ } -+ } -+ -+ if (newState != oldState) { -+ if (newState.isOrAfter(oldState)) { -+ // status upgrade -+ if (!oldState.isOrAfter(FullChunkStatus.FULL) && newState.isOrAfter(FullChunkStatus.FULL)) { -+ // may need to schedule full load -+ if (this.currentGenStatus != ChunkStatus.FULL) { -+ if (this.requestedGenStatus != null) { -+ this.requestedGenStatus = ChunkStatus.FULL; -+ } else { -+ this.scheduler.schedule( -+ this.chunkX, this.chunkZ, ChunkStatus.FULL, this, scheduledTasks -+ ); -+ } -+ } else { -+ // now we are fully loaded -+ this.queueBorderFullStatus(true, changedLoadStatus); -+ } -+ } -+ } else { -+ // status downgrade -+ if (!newState.isOrAfter(FullChunkStatus.ENTITY_TICKING) && oldState.isOrAfter(FullChunkStatus.ENTITY_TICKING)) { -+ this.completeFullStatusConsumers(FullChunkStatus.ENTITY_TICKING, null); -+ } -+ -+ if (!newState.isOrAfter(FullChunkStatus.BLOCK_TICKING) && oldState.isOrAfter(FullChunkStatus.BLOCK_TICKING)) { -+ this.completeFullStatusConsumers(FullChunkStatus.BLOCK_TICKING, null); -+ } -+ -+ if (!newState.isOrAfter(FullChunkStatus.FULL) && oldState.isOrAfter(FullChunkStatus.FULL)) { -+ this.completeFullStatusConsumers(FullChunkStatus.FULL, null); -+ } -+ } -+ } -+ -+ if (oldState != newState) { -+ if (this.onTicketUpdate(oldState, newState)) { -+ changedLoadStatus.add(this); -+ } -+ } -+ -+ if (oldUnloaded != newUnloaded) { -+ this.checkUnload(); -+ } -+ } -+ -+ /* -+ For full chunks, vanilla just loads chunks around it up to FEATURES, 1 radius -+ -+ For ticking chunks, it updates the persistent entity manager (soon to be completely nuked by EntitySliceManager, which -+ will also need to be updated but with far less implications) -+ It also shoves the scheduled block ticks into the tick scheduler -+ -+ For entity ticking chunks, updates the entity manager (see above) -+ */ -+ -+ static final int NEIGHBOUR_RADIUS = 2; -+ private long fullNeighbourChunksLoadedBitset; -+ -+ private static int getFullNeighbourIndex(final int relativeX, final int relativeZ) { -+ // index = (relativeX + NEIGHBOUR_CACHE_RADIUS) + (relativeZ + NEIGHBOUR_CACHE_RADIUS) * (NEIGHBOUR_CACHE_RADIUS * 2 + 1) -+ // optimised variant of the above by moving some of the ops to compile time -+ return relativeX + (relativeZ * (NEIGHBOUR_RADIUS * 2 + 1)) + (NEIGHBOUR_RADIUS + NEIGHBOUR_RADIUS * ((NEIGHBOUR_RADIUS * 2 + 1))); -+ } -+ public final boolean isNeighbourFullLoaded(final int relativeX, final int relativeZ) { -+ return (this.fullNeighbourChunksLoadedBitset & (1L << getFullNeighbourIndex(relativeX, relativeZ))) != 0; -+ } -+ -+ // returns true if this chunk changed full status -+ public final boolean setNeighbourFullLoaded(final int relativeX, final int relativeZ) { -+ final long before = this.fullNeighbourChunksLoadedBitset; -+ final int index = getFullNeighbourIndex(relativeX, relativeZ); -+ this.fullNeighbourChunksLoadedBitset |= (1L << index); -+ return this.onNeighbourChange(before, this.fullNeighbourChunksLoadedBitset); -+ } -+ -+ // returns true if this chunk changed full status -+ public final boolean setNeighbourFullUnloaded(final int relativeX, final int relativeZ) { -+ final long before = this.fullNeighbourChunksLoadedBitset; -+ final int index = getFullNeighbourIndex(relativeX, relativeZ); -+ this.fullNeighbourChunksLoadedBitset &= ~(1L << index); -+ return this.onNeighbourChange(before, this.fullNeighbourChunksLoadedBitset); -+ } -+ -+ public static boolean areNeighboursFullLoaded(final long bitset, final int radius) { -+ // index = relativeX + (relativeZ * (NEIGHBOUR_CACHE_RADIUS * 2 + 1)) + (NEIGHBOUR_CACHE_RADIUS + NEIGHBOUR_CACHE_RADIUS * ((NEIGHBOUR_CACHE_RADIUS * 2 + 1))) -+ switch (radius) { -+ case 0: { -+ return (bitset & (1L << getFullNeighbourIndex(0, 0))) != 0L; -+ } -+ case 1: { -+ long mask = 0L; -+ for (int dx = -1; dx <= 1; ++dx) { -+ for (int dz = -1; dz <= 1; ++dz) { -+ mask |= (1L << getFullNeighbourIndex(dx, dz)); -+ } -+ } -+ return (bitset & mask) == mask; -+ } -+ case 2: { -+ long mask = 0L; -+ for (int dx = -2; dx <= 2; ++dx) { -+ for (int dz = -2; dz <= 2; ++dz) { -+ mask |= (1L << getFullNeighbourIndex(dx, dz)); -+ } -+ } -+ return (bitset & mask) == mask; -+ } -+ -+ default: { -+ throw new IllegalArgumentException("Radius not recognized: " + radius); -+ } -+ } -+ } -+ -+ // upper 16 bits are pending status, lower 16 bits are current status -+ private volatile long chunkStatus; -+ private static final long PENDING_STATUS_MASK = Long.MIN_VALUE >> 31; -+ private static final FullChunkStatus[] CHUNK_STATUS_BY_ID = FullChunkStatus.values(); -+ private static final VarHandle CHUNK_STATUS_HANDLE = ConcurrentUtil.getVarHandle(NewChunkHolder.class, "chunkStatus", long.class); -+ -+ public static FullChunkStatus getCurrentChunkStatus(final long encoded) { -+ return CHUNK_STATUS_BY_ID[(int)encoded]; -+ } -+ -+ public static FullChunkStatus getPendingChunkStatus(final long encoded) { -+ return CHUNK_STATUS_BY_ID[(int)(encoded >>> 32)]; -+ } -+ -+ public FullChunkStatus getChunkStatus() { -+ return getCurrentChunkStatus(((long)CHUNK_STATUS_HANDLE.getVolatile((NewChunkHolder)this))); -+ } -+ -+ public boolean isEntityTickingReady() { -+ return this.getChunkStatus().isOrAfter(FullChunkStatus.ENTITY_TICKING); -+ } -+ -+ public boolean isTickingReady() { -+ return this.getChunkStatus().isOrAfter(FullChunkStatus.BLOCK_TICKING); -+ } -+ -+ public boolean isFullChunkReady() { -+ return this.getChunkStatus().isOrAfter(FullChunkStatus.FULL); -+ } -+ -+ private static FullChunkStatus getStatusForBitset(final long bitset) { -+ if (areNeighboursFullLoaded(bitset, 2)) { -+ return FullChunkStatus.ENTITY_TICKING; -+ } else if (areNeighboursFullLoaded(bitset, 1)) { -+ return FullChunkStatus.BLOCK_TICKING; -+ } else if (areNeighboursFullLoaded(bitset, 0)) { -+ return FullChunkStatus.FULL; -+ } else { -+ return FullChunkStatus.INACCESSIBLE; -+ } -+ } -+ -+ // note: only while updating ticket level, so holds ticket update lock + scheduling lock -+ protected final boolean onTicketUpdate(final FullChunkStatus oldState, final FullChunkStatus newState) { -+ if (oldState == newState) { -+ return false; -+ } -+ -+ // preserve border request after full status complete, as it does not set anything in the bitset -+ FullChunkStatus byNeighbours = getStatusForBitset(this.fullNeighbourChunksLoadedBitset); -+ if (byNeighbours == FullChunkStatus.INACCESSIBLE && newState.isOrAfter(FullChunkStatus.FULL) && this.currentGenStatus == ChunkStatus.FULL) { -+ byNeighbours = FullChunkStatus.FULL; -+ } -+ -+ final FullChunkStatus toSet; -+ -+ if (newState.isOrAfter(byNeighbours)) { -+ // must clamp to neighbours level, even though we have the ticket level -+ toSet = byNeighbours; -+ } else { -+ // must clamp to ticket level, even though we have the neighbours -+ toSet = newState; -+ } -+ -+ long curr = (long)CHUNK_STATUS_HANDLE.getVolatile((NewChunkHolder)this); -+ -+ if (curr == ((long)toSet.ordinal() | ((long)toSet.ordinal() << 32))) { -+ // nothing to do -+ return false; -+ } -+ -+ int failures = 0; -+ for (;;) { -+ final long update = (curr & ~PENDING_STATUS_MASK) | ((long)toSet.ordinal() << 32); -+ if (curr == (curr = (long)CHUNK_STATUS_HANDLE.compareAndExchange((NewChunkHolder)this, curr, update))) { -+ return true; -+ } -+ -+ ++failures; -+ for (int i = 0; i < failures; ++i) { -+ ConcurrentUtil.backoff(); -+ } -+ } -+ } -+ -+ protected final boolean onNeighbourChange(final long bitsetBefore, final long bitsetAfter) { -+ FullChunkStatus oldState = getStatusForBitset(bitsetBefore); -+ FullChunkStatus newState = getStatusForBitset(bitsetAfter); -+ final FullChunkStatus currStateTicketLevel = ChunkLevel.fullStatus(this.oldTicketLevel); -+ if (oldState.isOrAfter(currStateTicketLevel)) { -+ oldState = currStateTicketLevel; -+ } -+ if (newState.isOrAfter(currStateTicketLevel)) { -+ newState = currStateTicketLevel; -+ } -+ // preserve border request after full status complete, as it does not set anything in the bitset -+ if (newState == FullChunkStatus.INACCESSIBLE && currStateTicketLevel.isOrAfter(FullChunkStatus.FULL) && this.currentGenStatus == ChunkStatus.FULL) { -+ newState = FullChunkStatus.FULL; -+ } -+ -+ if (oldState == newState) { -+ return false; -+ } -+ -+ int failures = 0; -+ for (long curr = (long)CHUNK_STATUS_HANDLE.getVolatile((NewChunkHolder)this);;) { -+ final long update = (curr & ~PENDING_STATUS_MASK) | ((long)newState.ordinal() << 32); -+ if (curr == (curr = (long)CHUNK_STATUS_HANDLE.compareAndExchange((NewChunkHolder)this, curr, update))) { -+ return true; -+ } -+ -+ ++failures; -+ for (int i = 0; i < failures; ++i) { -+ ConcurrentUtil.backoff(); -+ } -+ } -+ } -+ -+ private boolean queueBorderFullStatus(final boolean loaded, final List changedFullStatus) { -+ final FullChunkStatus toStatus = loaded ? FullChunkStatus.FULL : FullChunkStatus.INACCESSIBLE; -+ -+ int failures = 0; -+ for (long curr = (long)CHUNK_STATUS_HANDLE.getVolatile((NewChunkHolder)this);;) { -+ final FullChunkStatus currPending = getPendingChunkStatus(curr); -+ if (loaded && currPending != FullChunkStatus.INACCESSIBLE) { -+ throw new IllegalStateException("Expected " + FullChunkStatus.INACCESSIBLE + " for pending, but got " + currPending); -+ } -+ -+ final long update = (curr & ~PENDING_STATUS_MASK) | ((long)toStatus.ordinal() << 32); -+ if (curr == (curr = (long)CHUNK_STATUS_HANDLE.compareAndExchange((NewChunkHolder)this, curr, update))) { -+ if ((int)(update) != (int)(update >>> 32)) { -+ changedFullStatus.add(this); -+ return true; -+ } -+ return false; -+ } -+ -+ ++failures; -+ for (int i = 0; i < failures; ++i) { -+ ConcurrentUtil.backoff(); -+ } -+ } -+ } -+ -+ // only call on main thread, must hold ticket level and scheduling lock -+ private void onFullChunkLoadChange(final boolean loaded, final List changedFullStatus) { -+ final ReentrantAreaLock.Node schedulingLock = this.scheduler.schedulingLockArea.lock(this.chunkX, this.chunkZ, NEIGHBOUR_RADIUS); -+ try { -+ for (int dz = -NEIGHBOUR_RADIUS; dz <= NEIGHBOUR_RADIUS; ++dz) { -+ for (int dx = -NEIGHBOUR_RADIUS; dx <= NEIGHBOUR_RADIUS; ++dx) { -+ final NewChunkHolder holder = (dx | dz) == 0 ? this : this.scheduler.chunkHolderManager.getChunkHolder(dx + this.chunkX, dz + this.chunkZ); -+ if (loaded) { -+ if (holder.setNeighbourFullLoaded(-dx, -dz)) { -+ changedFullStatus.add(holder); -+ } -+ } else { -+ if (holder != null && holder.setNeighbourFullUnloaded(-dx, -dz)) { -+ changedFullStatus.add(holder); -+ } -+ } -+ } -+ } -+ } finally { -+ this.scheduler.schedulingLockArea.unlock(schedulingLock); -+ } -+ } -+ -+ private FullChunkStatus updateCurrentState(final FullChunkStatus to) { -+ int failures = 0; -+ for (long curr = (long)CHUNK_STATUS_HANDLE.getVolatile((NewChunkHolder)this);;) { -+ final long update = (curr & PENDING_STATUS_MASK) | (long)to.ordinal(); -+ if (curr == (curr = (long)CHUNK_STATUS_HANDLE.compareAndExchange((NewChunkHolder)this, curr, update))) { -+ return getPendingChunkStatus(curr); -+ } -+ -+ ++failures; -+ for (int i = 0; i < failures; ++i) { -+ ConcurrentUtil.backoff(); -+ } -+ } -+ } -+ -+ private void changeEntityChunkStatus(final FullChunkStatus toStatus) { -+ this.world.getEntityLookup().chunkStatusChange(this.chunkX, this.chunkZ, toStatus); -+ } -+ -+ private boolean processingFullStatus = false; -+ -+ // only to be called on the main thread, no locks need to be held -+ public boolean handleFullStatusChange(final List changedFullStatus) { -+ TickThread.ensureTickThread(this.world, this.chunkX, this.chunkZ, "Cannot update full status thread off-main"); -+ -+ boolean ret = false; -+ -+ if (this.processingFullStatus) { -+ // we cannot process updates recursively -+ return ret; -+ } -+ -+ // note: use opaque reads for chunk status read since we need it to be atomic -+ -+ // test if anything changed -+ long statusCheck = (long)CHUNK_STATUS_HANDLE.getOpaque((NewChunkHolder)this); -+ if ((int)statusCheck == (int)(statusCheck >>> 32)) { -+ // nothing changed -+ return ret; -+ } -+ -+ final ChunkTaskScheduler scheduler = this.scheduler; -+ final ChunkHolderManager holderManager = scheduler.chunkHolderManager; -+ final int ticketKeep; -+ final Long ticketId = Long.valueOf(holderManager.getNextStatusUpgradeId()); -+ final ReentrantAreaLock.Node ticketLock = holderManager.ticketLockArea.lock(this.chunkX, this.chunkZ); -+ try { -+ ticketKeep = this.currentTicketLevel; -+ statusCheck = (long)CHUNK_STATUS_HANDLE.getOpaque((NewChunkHolder)this); -+ // handle race condition where ticket level and target status is updated concurrently -+ if ((int)statusCheck == (int)(statusCheck >>> 32)) { -+ // nothing changed -+ return ret; -+ } -+ holderManager.addTicketAtLevel(TicketType.STATUS_UPGRADE, CoordinateUtils.getChunkKey(this.chunkX, this.chunkZ), ticketKeep, ticketId, false); -+ } finally { -+ holderManager.ticketLockArea.unlock(ticketLock); -+ } -+ -+ this.processingFullStatus = true; -+ try { -+ for (;;) { -+ final long currStateEncoded = (long)CHUNK_STATUS_HANDLE.getOpaque((NewChunkHolder)this); -+ final FullChunkStatus currState = getCurrentChunkStatus(currStateEncoded); -+ FullChunkStatus nextState = getPendingChunkStatus(currStateEncoded); -+ if (currState == nextState) { -+ if (nextState == FullChunkStatus.INACCESSIBLE) { -+ final ReentrantAreaLock.Node schedulingLock = this.scheduler.schedulingLockArea.lock(this.chunkX, this.chunkZ); -+ try { -+ this.checkUnload(); -+ } finally { -+ this.scheduler.schedulingLockArea.unlock(schedulingLock); -+ } -+ } -+ break; -+ } -+ -+ // chunks cannot downgrade state while status is pending a change -+ final LevelChunk chunk = (LevelChunk)this.currentChunk; -+ -+ // Note: we assume that only load/unload contain plugin logic -+ // plugin logic is anything stupid enough to possibly change the chunk status while it is already -+ // being changed (i.e during load it is possible it will try to set to full ticking) -+ // in order to allow this change, we also need this plugin logic to be contained strictly after all -+ // of the chunk system load callbacks are invoked -+ if (nextState.isOrAfter(currState)) { -+ // state upgrade -+ if (!currState.isOrAfter(FullChunkStatus.FULL) && nextState.isOrAfter(FullChunkStatus.FULL)) { -+ nextState = this.updateCurrentState(FullChunkStatus.FULL); -+ holderManager.ensureInAutosave(this); -+ chunk.pushChunkIntoLoadedMap(); -+ this.changeEntityChunkStatus(FullChunkStatus.FULL); -+ chunk.onChunkLoad(this); -+ this.onFullChunkLoadChange(true, changedFullStatus); -+ this.completeFullStatusConsumers(FullChunkStatus.FULL, chunk); -+ } -+ -+ if (!currState.isOrAfter(FullChunkStatus.BLOCK_TICKING) && nextState.isOrAfter(FullChunkStatus.BLOCK_TICKING)) { -+ nextState = this.updateCurrentState(FullChunkStatus.BLOCK_TICKING); -+ this.changeEntityChunkStatus(FullChunkStatus.BLOCK_TICKING); -+ chunk.onChunkTicking(this); -+ this.completeFullStatusConsumers(FullChunkStatus.BLOCK_TICKING, chunk); -+ } -+ -+ if (!currState.isOrAfter(FullChunkStatus.ENTITY_TICKING) && nextState.isOrAfter(FullChunkStatus.ENTITY_TICKING)) { -+ nextState = this.updateCurrentState(FullChunkStatus.ENTITY_TICKING); -+ this.changeEntityChunkStatus(FullChunkStatus.ENTITY_TICKING); -+ chunk.onChunkEntityTicking(this); -+ this.completeFullStatusConsumers(FullChunkStatus.ENTITY_TICKING, chunk); -+ } -+ } else { -+ if (currState.isOrAfter(FullChunkStatus.ENTITY_TICKING) && !nextState.isOrAfter(FullChunkStatus.ENTITY_TICKING)) { -+ this.changeEntityChunkStatus(FullChunkStatus.BLOCK_TICKING); -+ chunk.onChunkNotEntityTicking(this); -+ nextState = this.updateCurrentState(FullChunkStatus.BLOCK_TICKING); -+ } -+ -+ if (currState.isOrAfter(FullChunkStatus.BLOCK_TICKING) && !nextState.isOrAfter(FullChunkStatus.BLOCK_TICKING)) { -+ this.changeEntityChunkStatus(FullChunkStatus.FULL); -+ chunk.onChunkNotTicking(this); -+ nextState = this.updateCurrentState(FullChunkStatus.FULL); -+ } -+ -+ if (currState.isOrAfter(FullChunkStatus.FULL) && !nextState.isOrAfter(FullChunkStatus.FULL)) { -+ this.onFullChunkLoadChange(false, changedFullStatus); -+ this.changeEntityChunkStatus(FullChunkStatus.INACCESSIBLE); -+ chunk.onChunkUnload(this); -+ nextState = this.updateCurrentState(FullChunkStatus.INACCESSIBLE); -+ } -+ } -+ -+ ret = true; -+ } -+ } finally { -+ this.processingFullStatus = false; -+ holderManager.removeTicketAtLevel(TicketType.STATUS_UPGRADE, this.chunkX, this.chunkZ, ticketKeep, ticketId); -+ } -+ -+ return ret; -+ } -+ -+ // note: must hold scheduling lock -+ // rets true if the current requested gen status is not null (effectively, whether further scheduling is not needed) -+ boolean upgradeGenTarget(final ChunkStatus toStatus) { -+ if (toStatus == null) { -+ throw new NullPointerException("toStatus cannot be null"); -+ } -+ if (this.requestedGenStatus == null && this.generationTask == null) { -+ return false; -+ } -+ if (this.requestedGenStatus == null || !this.requestedGenStatus.isOrAfter(toStatus)) { -+ this.requestedGenStatus = toStatus; -+ } -+ return true; -+ } -+ -+ public void setGenerationTarget(final ChunkStatus toStatus) { -+ this.requestedGenStatus = toStatus; -+ } -+ -+ public boolean hasGenerationTask() { -+ return this.generationTask != null; -+ } -+ -+ public ChunkStatus getCurrentGenStatus() { -+ return this.currentGenStatus; -+ } -+ -+ public ChunkStatus getRequestedGenStatus() { -+ return this.requestedGenStatus; -+ } -+ -+ private final Reference2ObjectOpenHashMap>> statusWaiters = new Reference2ObjectOpenHashMap<>(); -+ -+ void addStatusConsumer(final ChunkStatus status, final Consumer consumer) { -+ this.statusWaiters.computeIfAbsent(status, (final ChunkStatus keyInMap) -> { -+ return new ArrayList<>(4); -+ }).add(consumer); -+ } -+ -+ private void completeStatusConsumers(ChunkStatus status, final ChunkAccess chunk) { -+ // need to tell future statuses to complete if cancelled -+ do { -+ this.completeStatusConsumers0(status, chunk); -+ } while (chunk == null && status != (status = status.getNextStatus())); -+ } -+ -+ private void completeStatusConsumers0(final ChunkStatus status, final ChunkAccess chunk) { -+ final List> consumers; -+ consumers = this.statusWaiters.remove(status); -+ -+ if (consumers == null) { -+ return; -+ } -+ -+ // must be scheduled to main, we do not trust the callback to not do anything stupid -+ this.scheduler.scheduleChunkTask(this.chunkX, this.chunkZ, () -> { -+ for (final Consumer consumer : consumers) { -+ try { -+ consumer.accept(chunk); -+ } catch (final ThreadDeath thr) { -+ throw thr; -+ } catch (final Throwable thr) { -+ LOGGER.error("Failed to process chunk status callback", thr); -+ } -+ } -+ }, PrioritisedExecutor.Priority.HIGHEST); -+ } -+ -+ private final Reference2ObjectOpenHashMap>> fullStatusWaiters = new Reference2ObjectOpenHashMap<>(); -+ -+ void addFullStatusConsumer(final FullChunkStatus status, final Consumer consumer) { -+ this.fullStatusWaiters.computeIfAbsent(status, (final FullChunkStatus keyInMap) -> { -+ return new ArrayList<>(4); -+ }).add(consumer); -+ } -+ -+ private void completeFullStatusConsumers(FullChunkStatus status, final LevelChunk chunk) { -+ // need to tell future statuses to complete if cancelled -+ final FullChunkStatus max = CHUNK_STATUS_BY_ID[CHUNK_STATUS_BY_ID.length - 1]; -+ -+ for (;;) { -+ this.completeFullStatusConsumers0(status, chunk); -+ if (chunk != null || status == max) { -+ break; -+ } -+ status = CHUNK_STATUS_BY_ID[status.ordinal() + 1]; -+ } -+ } -+ -+ private void completeFullStatusConsumers0(final FullChunkStatus status, final LevelChunk chunk) { -+ final List> consumers; -+ consumers = this.fullStatusWaiters.remove(status); -+ -+ if (consumers == null) { -+ return; -+ } -+ -+ // must be scheduled to main, we do not trust the callback to not do anything stupid -+ this.scheduler.scheduleChunkTask(this.chunkX, this.chunkZ, () -> { -+ for (final Consumer consumer : consumers) { -+ try { -+ consumer.accept(chunk); -+ } catch (final ThreadDeath thr) { -+ throw thr; -+ } catch (final Throwable thr) { -+ LOGGER.error("Failed to process chunk status callback", thr); -+ } -+ } -+ }, PrioritisedExecutor.Priority.HIGHEST); -+ } -+ -+ // note: must hold scheduling lock -+ private void onChunkGenComplete(final ChunkAccess newChunk, final ChunkStatus newStatus, -+ final List scheduleList, final List changedLoadStatus) { -+ if (!this.neighboursBlockingGenTask.isEmpty()) { -+ throw new IllegalStateException("Cannot have neighbours blocking this gen task"); -+ } -+ if (newChunk != null || (this.requestedGenStatus == null || !this.requestedGenStatus.isOrAfter(newStatus))) { -+ this.completeStatusConsumers(newStatus, newChunk); -+ } -+ // done now, clear state (must be done before scheduling new tasks) -+ this.generationTask = null; -+ this.generationTaskStatus = null; -+ if (newChunk == null) { -+ // task was cancelled -+ // should be careful as this could be called while holding the schedule lock and/or inside the -+ // ticket level update -+ // while a task may be cancelled, it is possible for it to be later re-scheduled -+ // however, because generationTask is only set to null on _completion_, the scheduler leaves -+ // the rescheduling logic to us here -+ final ChunkStatus requestedGenStatus = this.requestedGenStatus; -+ this.requestedGenStatus = null; -+ if (requestedGenStatus != null) { -+ // it looks like it has been requested, so we must reschedule -+ if (!this.neighboursWaitingForUs.isEmpty()) { -+ for (final Iterator> iterator = this.neighboursWaitingForUs.reference2ObjectEntrySet().fastIterator(); iterator.hasNext();) { -+ final Reference2ObjectMap.Entry entry = iterator.next(); -+ -+ final NewChunkHolder chunkHolder = entry.getKey(); -+ final ChunkStatus toStatus = entry.getValue(); -+ -+ if (!requestedGenStatus.isOrAfter(toStatus)) { -+ // if we were cancelled, we are responsible for removing the waiter -+ if (!chunkHolder.neighboursBlockingGenTask.remove(this)) { -+ throw new IllegalStateException("Corrupt state"); -+ } -+ if (chunkHolder.neighboursBlockingGenTask.isEmpty()) { -+ chunkHolder.checkUnload(); -+ } -+ iterator.remove(); -+ continue; -+ } -+ } -+ } -+ -+ // note: only after generationTask -> null, generationTaskStatus -> null, and requestedGenStatus -> null -+ this.scheduler.schedule( -+ this.chunkX, this.chunkZ, requestedGenStatus, this, scheduleList -+ ); -+ -+ // return, can't do anything further -+ return; -+ } -+ -+ if (!this.neighboursWaitingForUs.isEmpty()) { -+ for (final NewChunkHolder chunkHolder : this.neighboursWaitingForUs.keySet()) { -+ if (!chunkHolder.neighboursBlockingGenTask.remove(this)) { -+ throw new IllegalStateException("Corrupt state"); -+ } -+ if (chunkHolder.neighboursBlockingGenTask.isEmpty()) { -+ chunkHolder.checkUnload(); -+ } -+ } -+ this.neighboursWaitingForUs.clear(); -+ } -+ // reset priority, we have nothing left to generate to -+ this.setPriority(PrioritisedExecutor.Priority.NORMAL); -+ this.checkUnload(); -+ return; -+ } -+ -+ this.currentChunk = newChunk; -+ this.currentGenStatus = newStatus; -+ this.lastChunkCompletion = new ChunkCompletion(newChunk, newStatus); -+ -+ final ChunkStatus requestedGenStatus = this.requestedGenStatus; -+ -+ List needsScheduling = null; -+ boolean recalculatePriority = false; -+ for (final Iterator> iterator -+ = this.neighboursWaitingForUs.reference2ObjectEntrySet().fastIterator(); iterator.hasNext();) { -+ final Reference2ObjectMap.Entry entry = iterator.next(); -+ final NewChunkHolder neighbour = entry.getKey(); -+ final ChunkStatus requiredStatus = entry.getValue(); -+ -+ if (!newStatus.isOrAfter(requiredStatus)) { -+ if (requestedGenStatus == null || !requestedGenStatus.isOrAfter(requiredStatus)) { -+ // if we're cancelled, still need to clear this map -+ if (!neighbour.neighboursBlockingGenTask.remove(this)) { -+ throw new IllegalStateException("Neighbour is not waiting for us?"); -+ } -+ if (neighbour.neighboursBlockingGenTask.isEmpty()) { -+ neighbour.checkUnload(); -+ } -+ -+ iterator.remove(); -+ } -+ continue; -+ } -+ -+ // doesn't matter what isCancelled is here, we need to schedule if we can -+ -+ recalculatePriority = true; -+ if (!neighbour.neighboursBlockingGenTask.remove(this)) { -+ throw new IllegalStateException("Neighbour is not waiting for us?"); -+ } -+ -+ if (neighbour.neighboursBlockingGenTask.isEmpty()) { -+ if (neighbour.requestedGenStatus != null) { -+ if (needsScheduling == null) { -+ needsScheduling = new ArrayList<>(); -+ } -+ needsScheduling.add(neighbour); -+ } else { -+ neighbour.checkUnload(); -+ } -+ } -+ -+ // remove last; access to entry will throw if removed -+ iterator.remove(); -+ } -+ -+ if (newStatus == ChunkStatus.FULL) { -+ this.lockPriority(); -+ // must use oldTicketLevel, we hold the schedule lock but not the ticket level lock -+ // however, schedule lock needs to be held for ticket level callback, so we're fine here -+ if (ChunkLevel.fullStatus(this.oldTicketLevel).isOrAfter(FullChunkStatus.FULL)) { -+ this.queueBorderFullStatus(true, changedLoadStatus); -+ } -+ } -+ -+ if (recalculatePriority) { -+ this.recalculateNeighbourRequestedPriority(); -+ } -+ -+ if (requestedGenStatus != null && !newStatus.isOrAfter(requestedGenStatus)) { -+ this.scheduleNeighbours(needsScheduling, scheduleList); -+ -+ // we need to schedule more tasks now -+ this.scheduler.schedule( -+ this.chunkX, this.chunkZ, requestedGenStatus, this, scheduleList -+ ); -+ } else { -+ // we're done now -+ if (requestedGenStatus != null) { -+ this.requestedGenStatus = null; -+ } -+ // reached final stage, so stop scheduling now -+ this.setPriority(PrioritisedExecutor.Priority.NORMAL); -+ this.checkUnload(); -+ -+ this.scheduleNeighbours(needsScheduling, scheduleList); -+ } -+ } -+ -+ private void scheduleNeighbours(final List needsScheduling, final List scheduleList) { -+ if (needsScheduling != null) { -+ for (int i = 0, len = needsScheduling.size(); i < len; ++i) { -+ final NewChunkHolder neighbour = needsScheduling.get(i); -+ -+ this.scheduler.schedule( -+ neighbour.chunkX, neighbour.chunkZ, neighbour.requestedGenStatus, neighbour, scheduleList -+ ); -+ } -+ } -+ } -+ -+ public void setGenerationTask(final ChunkProgressionTask generationTask, final ChunkStatus taskStatus, -+ final List neighbours) { -+ if (this.generationTask != null || (this.currentGenStatus != null && this.currentGenStatus.isOrAfter(taskStatus))) { -+ throw new IllegalStateException("Currently generating or provided task is trying to generate to a level we are already at!"); -+ } -+ if (this.requestedGenStatus == null || !this.requestedGenStatus.isOrAfter(taskStatus)) { -+ throw new IllegalStateException("Cannot schedule generation task when not requested"); -+ } -+ this.generationTask = generationTask; -+ this.generationTaskStatus = taskStatus; -+ -+ for (int i = 0, len = neighbours.size(); i < len; ++i) { -+ neighbours.get(i).addNeighbourUsingChunk(); -+ } -+ -+ this.checkUnload(); -+ -+ generationTask.onComplete((final ChunkAccess access, final Throwable thr) -> { -+ if (generationTask != this.generationTask) { -+ throw new IllegalStateException( -+ "Cannot complete generation task '" + generationTask + "' because we are waiting on '" + this.generationTask + "' instead!" -+ ); -+ } -+ if (thr != null) { -+ if (this.genTaskException != null) { -+ // first one is probably the TRUE problem -+ return; -+ } -+ // don't set generation task to null, so that scheduling will not attempt to create another task and it -+ // will automatically block any further scheduling usage of this chunk as it will wait forever for a failed -+ // task to complete -+ this.genTaskException = thr; -+ this.failedGenStatus = taskStatus; -+ this.genTaskFailedThread = Thread.currentThread(); -+ -+ this.scheduler.unrecoverableChunkSystemFailure(this.chunkX, this.chunkZ, Map.of( -+ "Generation task", ChunkTaskScheduler.stringIfNull(generationTask), -+ "Task to status", ChunkTaskScheduler.stringIfNull(taskStatus) -+ ), thr); -+ return; -+ } -+ -+ final boolean scheduleTasks; -+ List tasks = ChunkHolderManager.getCurrentTicketUpdateScheduling(); -+ if (tasks == null) { -+ scheduleTasks = true; -+ tasks = new ArrayList<>(); -+ } else { -+ scheduleTasks = false; -+ // we are currently updating ticket levels, so we already hold the schedule lock -+ // this means we have to leave the ticket level update to handle the scheduling -+ } -+ final List changedLoadStatus = new ArrayList<>(); -+ // theoretically, we could schedule a chunk at the max radius which performs another max radius access. So we need to double the radius. -+ final ReentrantAreaLock.Node schedulingLock = this.scheduler.schedulingLockArea.lock(this.chunkX, this.chunkZ, 2 * ChunkTaskScheduler.getMaxAccessRadius()); -+ try { -+ for (int i = 0, len = neighbours.size(); i < len; ++i) { -+ neighbours.get(i).removeNeighbourUsingChunk(); -+ } -+ this.onChunkGenComplete(access, taskStatus, tasks, changedLoadStatus); -+ } finally { -+ this.scheduler.schedulingLockArea.unlock(schedulingLock); -+ } -+ this.scheduler.chunkHolderManager.addChangedStatuses(changedLoadStatus); -+ -+ if (scheduleTasks) { -+ // can't hold the lock while scheduling, so we have to build the tasks and then schedule after -+ for (int i = 0, len = tasks.size(); i < len; ++i) { -+ tasks.get(i).schedule(); -+ } -+ } -+ }); -+ } -+ -+ public PoiChunk getPoiChunk() { -+ return this.poiChunk; -+ } -+ -+ public ChunkEntitySlices getEntityChunk() { -+ return this.entityChunk; -+ } -+ -+ public long lastAutoSave; -+ -+ public static final record SaveStat(boolean savedChunk, boolean savedEntityChunk, boolean savedPoiChunk) {} -+ -+ public SaveStat save(final boolean shutdown, final boolean unloading) { -+ TickThread.ensureTickThread(this.world, this.chunkX, this.chunkZ, "Cannot save data off-main"); -+ -+ ChunkAccess chunk = this.getCurrentChunk(); -+ PoiChunk poi = this.getPoiChunk(); -+ ChunkEntitySlices entities = this.getEntityChunk(); -+ boolean executedUnloadTask = false; -+ -+ if (shutdown) { -+ // make sure that the async unloads complete -+ if (this.unloadState != null) { -+ // must have errored during unload -+ chunk = this.unloadState.chunk(); -+ poi = this.unloadState.poiChunk(); -+ entities = this.unloadState.entityChunk(); -+ } -+ final UnloadTask chunkUnloadTask = this.chunkDataUnload; -+ final DelayedPrioritisedTask chunkDataUnloadTask = chunkUnloadTask == null ? null : chunkUnloadTask.task(); -+ if (chunkDataUnloadTask != null) { -+ final PrioritisedExecutor.PrioritisedTask unloadTask = chunkDataUnloadTask.getTask(); -+ if (unloadTask != null) { -+ executedUnloadTask = unloadTask.execute(); -+ } -+ } -+ } -+ -+ boolean canSaveChunk = !(chunk instanceof LevelChunk levelChunk && levelChunk.mustNotSave) && -+ (chunk != null && ((shutdown || chunk instanceof LevelChunk) && chunk.isUnsaved())); -+ boolean canSavePOI = !(chunk instanceof LevelChunk levelChunk && levelChunk.mustNotSave) && (poi != null && poi.isDirty()); -+ boolean canSaveEntities = entities != null; -+ -+ try (co.aikar.timings.Timing ignored = this.world.timings.chunkSave.startTiming()) { // Paper -+ if (canSaveChunk) { -+ canSaveChunk = this.saveChunk(chunk, unloading); -+ } -+ if (canSavePOI) { -+ canSavePOI = this.savePOI(poi, unloading); -+ } -+ if (canSaveEntities) { -+ // on shutdown, we need to force transient entity chunks to save -+ canSaveEntities = this.saveEntities(entities, unloading || shutdown); -+ if (unloading || shutdown) { -+ this.lastEntityUnload = null; -+ } -+ } -+ } -+ -+ return executedUnloadTask | canSaveChunk | canSaveEntities | canSavePOI ? new SaveStat(executedUnloadTask || canSaveChunk, canSaveEntities, canSavePOI): null; -+ } -+ -+ static final class AsyncChunkSerializeTask implements Runnable { -+ -+ private final ServerLevel world; -+ private final ChunkAccess chunk; -+ private final ChunkSerializer.AsyncSaveData asyncSaveData; -+ private final NewChunkHolder toComplete; -+ -+ public AsyncChunkSerializeTask(final ServerLevel world, final ChunkAccess chunk, final ChunkSerializer.AsyncSaveData asyncSaveData, -+ final NewChunkHolder toComplete) { -+ this.world = world; -+ this.chunk = chunk; -+ this.asyncSaveData = asyncSaveData; -+ this.toComplete = toComplete; -+ } -+ -+ @Override -+ public void run() { -+ final CompoundTag toSerialize; -+ try { -+ toSerialize = ChunkSerializer.saveChunk(this.world, this.chunk, this.asyncSaveData); -+ } catch (final ThreadDeath death) { -+ throw death; -+ } catch (final Throwable throwable) { -+ LOGGER.error("Failed to asynchronously save chunk " + this.chunk.getPos() + " for world '" + this.world.getWorld().getName() + "', falling back to synchronous save", throwable); -+ this.world.chunkTaskScheduler.scheduleChunkTask(this.chunk.locX, this.chunk.locZ, () -> { -+ final CompoundTag synchronousSave; -+ try { -+ synchronousSave = ChunkSerializer.saveChunk(AsyncChunkSerializeTask.this.world, AsyncChunkSerializeTask.this.chunk, AsyncChunkSerializeTask.this.asyncSaveData); -+ } catch (final ThreadDeath death) { -+ throw death; -+ } catch (final Throwable throwable2) { -+ LOGGER.error("Failed to synchronously save chunk " + AsyncChunkSerializeTask.this.chunk.getPos() + " for world '" + AsyncChunkSerializeTask.this.world.getWorld().getName() + "', chunk data will be lost", throwable2); -+ AsyncChunkSerializeTask.this.toComplete.completeAsyncChunkDataSave(null); -+ return; -+ } -+ -+ AsyncChunkSerializeTask.this.toComplete.completeAsyncChunkDataSave(synchronousSave); -+ LOGGER.info("Successfully serialized chunk " + AsyncChunkSerializeTask.this.chunk.getPos() + " for world '" + AsyncChunkSerializeTask.this.world.getWorld().getName() + "' synchronously"); -+ -+ }, PrioritisedExecutor.Priority.HIGHEST); -+ return; -+ } -+ this.toComplete.completeAsyncChunkDataSave(toSerialize); -+ } -+ -+ @Override -+ public String toString() { -+ return "AsyncChunkSerializeTask{" + -+ "chunk={pos=" + this.chunk.getPos() + ",world=\"" + this.world.getWorld().getName() + "\"}" + -+ "}"; -+ } -+ } -+ -+ private boolean saveChunk(final ChunkAccess chunk, final boolean unloading) { -+ if (!chunk.isUnsaved()) { -+ if (unloading) { -+ this.completeAsyncChunkDataSave(null); -+ } -+ return false; -+ } -+ boolean completing = false; -+ try { -+ if (unloading) { -+ try { -+ final ChunkSerializer.AsyncSaveData asyncSaveData = ChunkSerializer.getAsyncSaveData(this.world, chunk); -+ -+ final PrioritisedExecutor.PrioritisedTask task = this.scheduler.loadExecutor.createTask(new AsyncChunkSerializeTask(this.world, chunk, asyncSaveData, this)); -+ -+ this.chunkDataUnload.task().setTask(task); -+ -+ task.queue(); -+ -+ chunk.setUnsaved(false); -+ -+ return true; -+ } catch (final ThreadDeath death) { -+ throw death; -+ } catch (final Throwable thr) { -+ LOGGER.error("Failed to prepare async chunk data (" + this.chunkX + "," + this.chunkZ + ") in world '" + this.world.getWorld().getName() + "', falling back to synchronous save", thr); -+ // fall through to synchronous save -+ } -+ } -+ -+ final CompoundTag save = ChunkSerializer.saveChunk(this.world, chunk, null); -+ -+ if (unloading) { -+ completing = true; -+ this.completeAsyncChunkDataSave(save); -+ LOGGER.info("Successfully serialized chunk data (" + this.chunkX + "," + this.chunkZ + ") in world '" + this.world.getWorld().getName() + "' synchronously"); -+ } else { -+ RegionFileIOThread.scheduleSave(this.world, this.chunkX, this.chunkZ, save, RegionFileIOThread.RegionFileType.CHUNK_DATA); -+ } -+ chunk.setUnsaved(false); -+ } catch (final ThreadDeath death) { -+ throw death; -+ } catch (final Throwable thr) { -+ LOGGER.error("Failed to save chunk data (" + this.chunkX + "," + this.chunkZ + ") in world '" + this.world.getWorld().getName() + "'"); -+ if (unloading && !completing) { -+ this.completeAsyncChunkDataSave(null); -+ } -+ } -+ -+ return true; -+ } -+ -+ private boolean lastEntitySaveNull; -+ private CompoundTag lastEntityUnload; -+ private boolean saveEntities(final ChunkEntitySlices entities, final boolean unloading) { -+ try { -+ CompoundTag mergeFrom = null; -+ if (entities.isTransient()) { -+ if (!unloading) { -+ // if we're a transient chunk, we cannot save until unloading because otherwise a double save will -+ // result in double adding the entities -+ return false; -+ } -+ try { -+ mergeFrom = RegionFileIOThread.loadData(this.world, this.chunkX, this.chunkZ, RegionFileIOThread.RegionFileType.ENTITY_DATA, PrioritisedExecutor.Priority.BLOCKING); -+ } catch (final Exception ex) { -+ LOGGER.error("Cannot merge transient entities for chunk (" + this.chunkX + "," + this.chunkZ + ") in world '" + this.world.getWorld().getName() + "', data on disk will be replaced", ex); -+ } -+ } -+ -+ final CompoundTag save = entities.save(); -+ if (mergeFrom != null) { -+ if (save == null) { -+ // don't override the data on disk with nothing -+ return false; -+ } else { -+ EntityStorage.copyEntities(mergeFrom, save); -+ } -+ } -+ if (save == null && this.lastEntitySaveNull) { -+ return false; -+ } -+ -+ RegionFileIOThread.scheduleSave(this.world, this.chunkX, this.chunkZ, save, RegionFileIOThread.RegionFileType.ENTITY_DATA); -+ this.lastEntitySaveNull = save == null; -+ if (unloading) { -+ this.lastEntityUnload = save; -+ } -+ } catch (final ThreadDeath death) { -+ throw death; -+ } catch (final Throwable thr) { -+ LOGGER.error("Failed to save entity data (" + this.chunkX + "," + this.chunkZ + ") in world '" + this.world.getWorld().getName() + "'"); -+ } -+ -+ return true; -+ } -+ -+ private boolean lastPoiSaveNull; -+ private boolean savePOI(final PoiChunk poi, final boolean unloading) { -+ try { -+ final CompoundTag save = poi.save(); -+ poi.setDirty(false); -+ if (save == null && this.lastPoiSaveNull) { -+ if (unloading) { -+ this.poiDataUnload.completable().complete(null); -+ } -+ return false; -+ } -+ -+ RegionFileIOThread.scheduleSave(this.world, this.chunkX, this.chunkZ, save, RegionFileIOThread.RegionFileType.POI_DATA); -+ this.lastPoiSaveNull = save == null; -+ if (unloading) { -+ this.poiDataUnload.completable().complete(save); -+ } -+ } catch (final ThreadDeath death) { -+ throw death; -+ } catch (final Throwable thr) { -+ LOGGER.error("Failed to save poi data (" + this.chunkX + "," + this.chunkZ + ") in world '" + this.world.getWorld().getName() + "'"); -+ } -+ -+ return true; -+ } -+ -+ @Override -+ public String toString() { -+ final ChunkCompletion lastCompletion = this.lastChunkCompletion; -+ final ChunkEntitySlices entityChunk = this.entityChunk; -+ final long chunkStatus = this.chunkStatus; -+ final int fullChunkStatus = (int)chunkStatus; -+ final int pendingChunkStatus = (int)(chunkStatus >>> 32); -+ final FullChunkStatus currentFullStatus = fullChunkStatus < 0 || fullChunkStatus >= CHUNK_STATUS_BY_ID.length ? null : CHUNK_STATUS_BY_ID[fullChunkStatus]; -+ final FullChunkStatus pendingFullStatus = pendingChunkStatus < 0 || pendingChunkStatus >= CHUNK_STATUS_BY_ID.length ? null : CHUNK_STATUS_BY_ID[pendingChunkStatus]; -+ return "NewChunkHolder{" + -+ "world=" + this.world.getWorld().getName() + -+ ", chunkX=" + this.chunkX + -+ ", chunkZ=" + this.chunkZ + -+ ", entityChunkFromDisk=" + (entityChunk != null && !entityChunk.isTransient()) + -+ ", lastChunkCompletion={chunk_class=" + (lastCompletion == null || lastCompletion.chunk() == null ? "null" : lastCompletion.chunk().getClass().getName()) + ",status=" + (lastCompletion == null ? "null" : lastCompletion.genStatus()) + "}" + -+ ", currentGenStatus=" + this.currentGenStatus + -+ ", requestedGenStatus=" + this.requestedGenStatus + -+ ", generationTask=" + this.generationTask + -+ ", generationTaskStatus=" + this.generationTaskStatus + -+ ", priority=" + this.priority + -+ ", priorityLocked=" + this.priorityLocked + -+ ", neighbourRequestedPriority=" + this.neighbourRequestedPriority + -+ ", effective_priority=" + this.getEffectivePriority() + -+ ", oldTicketLevel=" + this.oldTicketLevel + -+ ", currentTicketLevel=" + this.currentTicketLevel + -+ ", totalNeighboursUsingThisChunk=" + this.totalNeighboursUsingThisChunk + -+ ", fullNeighbourChunksLoadedBitset=" + this.fullNeighbourChunksLoadedBitset + -+ ", chunkStatusRaw=" + chunkStatus + -+ ", currentChunkStatus=" + currentFullStatus + -+ ", pendingChunkStatus=" + pendingFullStatus + -+ ", is_unload_safe=" + this.isSafeToUnload() + -+ ", killed=" + this.killed + -+ '}'; -+ } -+ -+ private static JsonElement serializeCompletable(final Completable completable) { -+ if (completable == null) { -+ return new JsonPrimitive("null"); -+ } -+ -+ final JsonObject ret = new JsonObject(); -+ final boolean isCompleted = completable.isCompleted(); -+ ret.addProperty("completed", Boolean.valueOf(isCompleted)); -+ -+ if (isCompleted) { -+ ret.addProperty("completed_exceptionally", Boolean.valueOf(completable.getThrowable() != null)); -+ } -+ -+ return ret; -+ } -+ -+ // holds ticket and scheduling lock -+ public JsonObject getDebugJson() { -+ final JsonObject ret = new JsonObject(); -+ -+ final ChunkCompletion lastCompletion = this.lastChunkCompletion; -+ final ChunkEntitySlices slices = this.entityChunk; -+ final PoiChunk poiChunk = this.poiChunk; -+ -+ ret.addProperty("chunkX", Integer.valueOf(this.chunkX)); -+ ret.addProperty("chunkZ", Integer.valueOf(this.chunkZ)); -+ ret.addProperty("entity_chunk", slices == null ? "null" : "transient=" + slices.isTransient()); -+ ret.addProperty("poi_chunk", "null=" + (poiChunk == null)); -+ ret.addProperty("completed_chunk_class", lastCompletion == null ? "null" : lastCompletion.chunk().getClass().getName()); -+ ret.addProperty("completed_gen_status", lastCompletion == null ? "null" : lastCompletion.genStatus().toString()); -+ ret.addProperty("priority", Objects.toString(this.priority)); -+ ret.addProperty("neighbour_requested_priority", Objects.toString(this.neighbourRequestedPriority)); -+ ret.addProperty("generation_task", Objects.toString(this.generationTask)); -+ ret.addProperty("is_safe_unload", Objects.toString(this.isSafeToUnload())); -+ ret.addProperty("old_ticket_level", Integer.valueOf(this.oldTicketLevel)); -+ ret.addProperty("current_ticket_level", Integer.valueOf(this.currentTicketLevel)); -+ ret.addProperty("neighbours_using_chunk", Integer.valueOf(this.totalNeighboursUsingThisChunk)); -+ -+ final JsonObject neighbourWaitState = new JsonObject(); -+ ret.add("neighbour_state", neighbourWaitState); -+ -+ final JsonArray blockingGenNeighbours = new JsonArray(); -+ neighbourWaitState.add("blocking_gen_task", blockingGenNeighbours); -+ for (final NewChunkHolder blockingGenNeighbour : this.neighboursBlockingGenTask) { -+ final JsonObject neighbour = new JsonObject(); -+ blockingGenNeighbours.add(neighbour); -+ -+ neighbour.addProperty("chunkX", Integer.valueOf(blockingGenNeighbour.chunkX)); -+ neighbour.addProperty("chunkZ", Integer.valueOf(blockingGenNeighbour.chunkZ)); -+ } -+ -+ final JsonArray neighboursWaitingForUs = new JsonArray(); -+ neighbourWaitState.add("neighbours_waiting_on_us", neighboursWaitingForUs); -+ for (final Reference2ObjectMap.Entry entry : this.neighboursWaitingForUs.reference2ObjectEntrySet()) { -+ final NewChunkHolder holder = entry.getKey(); -+ final ChunkStatus status = entry.getValue(); -+ -+ final JsonObject neighbour = new JsonObject(); -+ neighboursWaitingForUs.add(neighbour); -+ -+ -+ neighbour.addProperty("chunkX", Integer.valueOf(holder.chunkX)); -+ neighbour.addProperty("chunkZ", Integer.valueOf(holder.chunkZ)); -+ neighbour.addProperty("waiting_for", Objects.toString(status)); -+ } -+ -+ ret.addProperty("fullchunkstatus", Objects.toString(this.getChunkStatus())); -+ ret.addProperty("fullchunkstatus_raw", Long.valueOf(this.chunkStatus)); -+ ret.addProperty("generation_task", Objects.toString(this.generationTask)); -+ ret.addProperty("requested_generation", Objects.toString(this.requestedGenStatus)); -+ ret.addProperty("has_entity_load_task", Boolean.valueOf(this.entityDataLoadTask != null)); -+ ret.addProperty("has_poi_load_task", Boolean.valueOf(this.poiDataLoadTask != null)); -+ -+ final UnloadTask entityDataUnload = this.entityDataUnload; -+ final UnloadTask poiDataUnload = this.poiDataUnload; -+ final UnloadTask chunkDataUnload = this.chunkDataUnload; -+ -+ ret.add("entity_unload_completable", serializeCompletable(entityDataUnload == null ? null : entityDataUnload.completable())); -+ ret.add("poi_unload_completable", serializeCompletable(poiDataUnload == null ? null : poiDataUnload.completable())); -+ ret.add("chunk_unload_completable", serializeCompletable(chunkDataUnload == null ? null : chunkDataUnload.completable())); -+ -+ final DelayedPrioritisedTask unloadTask = chunkDataUnload == null ? null : chunkDataUnload.task(); -+ if (unloadTask == null) { -+ ret.addProperty("unload_task_priority", "null"); -+ ret.addProperty("unload_task_priority_raw", "null"); -+ } else { -+ ret.addProperty("unload_task_priority", Objects.toString(unloadTask.getPriority())); -+ ret.addProperty("unload_task_priority_raw", Integer.valueOf(unloadTask.getPriorityInternal())); -+ } -+ -+ ret.addProperty("killed", Boolean.valueOf(this.killed)); -+ -+ return ret; -+ } -+} -diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/PriorityHolder.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/PriorityHolder.java -new file mode 100644 -index 0000000000000000000000000000000000000000..b4c56bf12dc8dd17452210ece4fd67411cc6b2fd ---- /dev/null -+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/PriorityHolder.java -@@ -0,0 +1,215 @@ -+package io.papermc.paper.chunk.system.scheduling; -+ -+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; -+import ca.spottedleaf.concurrentutil.util.ConcurrentUtil; -+import java.lang.invoke.VarHandle; -+ -+public abstract class PriorityHolder { -+ -+ protected volatile int priority; -+ protected static final VarHandle PRIORITY_HANDLE = ConcurrentUtil.getVarHandle(PriorityHolder.class, "priority", int.class); -+ -+ protected static final int PRIORITY_SCHEDULED = Integer.MIN_VALUE >>> 0; -+ protected static final int PRIORITY_EXECUTED = Integer.MIN_VALUE >>> 1; -+ -+ protected final int getPriorityVolatile() { -+ return (int)PRIORITY_HANDLE.getVolatile((PriorityHolder)this); -+ } -+ -+ protected final int compareAndExchangePriorityVolatile(final int expect, final int update) { -+ return (int)PRIORITY_HANDLE.compareAndExchange((PriorityHolder)this, (int)expect, (int)update); -+ } -+ -+ protected final int getAndOrPriorityVolatile(final int val) { -+ return (int)PRIORITY_HANDLE.getAndBitwiseOr((PriorityHolder)this, (int)val); -+ } -+ -+ protected final void setPriorityPlain(final int val) { -+ PRIORITY_HANDLE.set((PriorityHolder)this, (int)val); -+ } -+ -+ protected PriorityHolder(final PrioritisedExecutor.Priority priority) { -+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { -+ throw new IllegalArgumentException("Invalid priority " + priority); -+ } -+ this.setPriorityPlain(priority.priority); -+ } -+ -+ // used only for debug json -+ public boolean isScheduled() { -+ return (this.getPriorityVolatile() & PRIORITY_SCHEDULED) != 0; -+ } -+ -+ // returns false if cancelled -+ protected boolean markExecuting() { -+ return (this.getAndOrPriorityVolatile(PRIORITY_EXECUTED) & PRIORITY_EXECUTED) == 0; -+ } -+ -+ protected boolean isMarkedExecuted() { -+ return (this.getPriorityVolatile() & PRIORITY_EXECUTED) != 0; -+ } -+ -+ public void cancel() { -+ if ((this.getAndOrPriorityVolatile(PRIORITY_EXECUTED) & PRIORITY_EXECUTED) != 0) { -+ // cancelled already -+ return; -+ } -+ this.cancelScheduled(); -+ } -+ -+ public void schedule() { -+ int priority = this.getPriorityVolatile(); -+ -+ if ((priority & PRIORITY_SCHEDULED) != 0) { -+ throw new IllegalStateException("schedule() called twice"); -+ } -+ -+ if ((priority & PRIORITY_EXECUTED) != 0) { -+ // cancelled -+ return; -+ } -+ -+ this.scheduleTask(PrioritisedExecutor.Priority.getPriority(priority)); -+ -+ int failures = 0; -+ for (;;) { -+ if (priority == (priority = this.compareAndExchangePriorityVolatile(priority, priority | PRIORITY_SCHEDULED))) { -+ return; -+ } -+ -+ if ((priority & PRIORITY_SCHEDULED) != 0) { -+ throw new IllegalStateException("schedule() called twice"); -+ } -+ -+ if ((priority & PRIORITY_EXECUTED) != 0) { -+ // cancelled or executed -+ return; -+ } -+ -+ this.setPriorityScheduled(PrioritisedExecutor.Priority.getPriority(priority)); -+ -+ ++failures; -+ for (int i = 0; i < failures; ++i) { -+ ConcurrentUtil.backoff(); -+ } -+ } -+ } -+ -+ public final PrioritisedExecutor.Priority getPriority() { -+ final int ret = this.getPriorityVolatile(); -+ if ((ret & PRIORITY_EXECUTED) != 0) { -+ return PrioritisedExecutor.Priority.COMPLETING; -+ } -+ if ((ret & PRIORITY_SCHEDULED) != 0) { -+ return this.getScheduledPriority(); -+ } -+ return PrioritisedExecutor.Priority.getPriority(ret); -+ } -+ -+ public final void lowerPriority(final PrioritisedExecutor.Priority priority) { -+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { -+ throw new IllegalArgumentException("Invalid priority " + priority); -+ } -+ -+ int failures = 0; -+ for (int curr = this.getPriorityVolatile();;) { -+ if ((curr & PRIORITY_EXECUTED) != 0) { -+ return; -+ } -+ -+ if ((curr & PRIORITY_SCHEDULED) != 0) { -+ this.lowerPriorityScheduled(priority); -+ return; -+ } -+ -+ if (!priority.isLowerPriority(curr)) { -+ return; -+ } -+ -+ if (curr == (curr = this.compareAndExchangePriorityVolatile(curr, priority.priority))) { -+ return; -+ } -+ -+ // failed, retry -+ -+ ++failures; -+ for (int i = 0; i < failures; ++i) { -+ ConcurrentUtil.backoff(); -+ } -+ } -+ } -+ -+ public final void setPriority(final PrioritisedExecutor.Priority priority) { -+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { -+ throw new IllegalArgumentException("Invalid priority " + priority); -+ } -+ -+ int failures = 0; -+ for (int curr = this.getPriorityVolatile();;) { -+ if ((curr & PRIORITY_EXECUTED) != 0) { -+ return; -+ } -+ -+ if ((curr & PRIORITY_SCHEDULED) != 0) { -+ this.setPriorityScheduled(priority); -+ return; -+ } -+ -+ if (curr == (curr = this.compareAndExchangePriorityVolatile(curr, priority.priority))) { -+ return; -+ } -+ -+ // failed, retry -+ -+ ++failures; -+ for (int i = 0; i < failures; ++i) { -+ ConcurrentUtil.backoff(); -+ } -+ } -+ } -+ -+ public final void raisePriority(final PrioritisedExecutor.Priority priority) { -+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { -+ throw new IllegalArgumentException("Invalid priority " + priority); -+ } -+ -+ int failures = 0; -+ for (int curr = this.getPriorityVolatile();;) { -+ if ((curr & PRIORITY_EXECUTED) != 0) { -+ return; -+ } -+ -+ if ((curr & PRIORITY_SCHEDULED) != 0) { -+ this.raisePriorityScheduled(priority); -+ return; -+ } -+ -+ if (!priority.isHigherPriority(curr)) { -+ return; -+ } -+ -+ if (curr == (curr = this.compareAndExchangePriorityVolatile(curr, priority.priority))) { -+ return; -+ } -+ -+ // failed, retry -+ -+ ++failures; -+ for (int i = 0; i < failures; ++i) { -+ ConcurrentUtil.backoff(); -+ } -+ } -+ } -+ -+ protected abstract void cancelScheduled(); -+ -+ protected abstract PrioritisedExecutor.Priority getScheduledPriority(); -+ -+ protected abstract void scheduleTask(final PrioritisedExecutor.Priority priority); -+ -+ protected abstract void lowerPriorityScheduled(final PrioritisedExecutor.Priority priority); -+ -+ protected abstract void setPriorityScheduled(final PrioritisedExecutor.Priority priority); -+ -+ protected abstract void raisePriorityScheduled(final PrioritisedExecutor.Priority priority); -+} -diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ThreadedTicketLevelPropagator.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ThreadedTicketLevelPropagator.java -new file mode 100644 -index 0000000000000000000000000000000000000000..287240ed3b440f2f5733c368416e4276f626405d ---- /dev/null -+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ThreadedTicketLevelPropagator.java -@@ -0,0 +1,1477 @@ -+package io.papermc.paper.chunk.system.scheduling; -+ -+import ca.spottedleaf.concurrentutil.collection.MultiThreadedQueue; -+import ca.spottedleaf.concurrentutil.lock.ReentrantAreaLock; -+import ca.spottedleaf.concurrentutil.util.ConcurrentUtil; -+import it.unimi.dsi.fastutil.HashCommon; -+import it.unimi.dsi.fastutil.longs.Long2ByteLinkedOpenHashMap; -+import it.unimi.dsi.fastutil.shorts.Short2ByteLinkedOpenHashMap; -+import it.unimi.dsi.fastutil.shorts.Short2ByteMap; -+import it.unimi.dsi.fastutil.shorts.ShortOpenHashSet; -+import java.lang.invoke.VarHandle; -+import java.util.ArrayDeque; -+import java.util.Arrays; -+import java.util.Iterator; -+import java.util.List; -+import java.util.concurrent.ConcurrentHashMap; -+import java.util.concurrent.locks.LockSupport; -+ -+public abstract class ThreadedTicketLevelPropagator { -+ -+ // sections are 64 in length -+ public static final int SECTION_SHIFT = 6; -+ public static final int SECTION_SIZE = 1 << SECTION_SHIFT; -+ private static final int LEVEL_BITS = SECTION_SHIFT; -+ private static final int LEVEL_COUNT = 1 << LEVEL_BITS; -+ private static final int MIN_SOURCE_LEVEL = 1; -+ // we limit the max source to 62 because the depropagation code _must_ attempt to depropagate -+ // a 1 level to 0; and if a source was 63 then it may cross more than 2 sections in depropagation -+ private static final int MAX_SOURCE_LEVEL = 62; -+ -+ private final UpdateQueue updateQueue; -+ private final ConcurrentHashMap sections = new ConcurrentHashMap<>(); -+ -+ public ThreadedTicketLevelPropagator() { -+ this.updateQueue = new UpdateQueue(); -+ } -+ -+ // must hold ticket lock for: -+ // (posX & ~(SECTION_SIZE - 1), posZ & ~(SECTION_SIZE - 1)) to (posX | (SECTION_SIZE - 1), posZ | (SECTION_SIZE - 1)) -+ public void setSource(final int posX, final int posZ, final int to) { -+ if (to < 1 || to > MAX_SOURCE_LEVEL) { -+ throw new IllegalArgumentException("Source: " + to); -+ } -+ -+ final int sectionX = posX >> SECTION_SHIFT; -+ final int sectionZ = posZ >> SECTION_SHIFT; -+ -+ final Coordinate coordinate = new Coordinate(sectionX, sectionZ); -+ Section section = this.sections.get(coordinate); -+ if (section == null) { -+ if (null != this.sections.putIfAbsent(coordinate, section = new Section(sectionX, sectionZ))) { -+ throw new IllegalStateException("Race condition while creating new section"); -+ } -+ } -+ -+ final int localIdx = (posX & (SECTION_SIZE - 1)) | ((posZ & (SECTION_SIZE - 1)) << SECTION_SHIFT); -+ final short sLocalIdx = (short)localIdx; -+ -+ final short sourceAndLevel = section.levels[localIdx]; -+ final int currentSource = (sourceAndLevel >>> 8) & 0xFF; -+ -+ if (currentSource == to) { -+ // nothing to do -+ // make sure to kill the current update, if any -+ section.queuedSources.replace(sLocalIdx, (byte)to); -+ return; -+ } -+ -+ if (section.queuedSources.put(sLocalIdx, (byte)to) == Section.NO_QUEUED_UPDATE && section.queuedSources.size() == 1) { -+ this.queueSectionUpdate(section); -+ } -+ } -+ -+ // must hold ticket lock for: -+ // (posX & ~(SECTION_SIZE - 1), posZ & ~(SECTION_SIZE - 1)) to (posX | (SECTION_SIZE - 1), posZ | (SECTION_SIZE - 1)) -+ public void removeSource(final int posX, final int posZ) { -+ final int sectionX = posX >> SECTION_SHIFT; -+ final int sectionZ = posZ >> SECTION_SHIFT; -+ -+ final Coordinate coordinate = new Coordinate(sectionX, sectionZ); -+ final Section section = this.sections.get(coordinate); -+ -+ if (section == null) { -+ return; -+ } -+ -+ final int localIdx = (posX & (SECTION_SIZE - 1)) | ((posZ & (SECTION_SIZE - 1)) << SECTION_SHIFT); -+ final short sLocalIdx = (short)localIdx; -+ -+ final int currentSource = (section.levels[localIdx] >>> 8) & 0xFF; -+ -+ if (currentSource == 0) { -+ // we use replace here so that we do not possibly multi-queue a section for an update -+ section.queuedSources.replace(sLocalIdx, (byte)0); -+ return; -+ } -+ -+ if (section.queuedSources.put(sLocalIdx, (byte)0) == Section.NO_QUEUED_UPDATE && section.queuedSources.size() == 1) { -+ this.queueSectionUpdate(section); -+ } -+ } -+ -+ private void queueSectionUpdate(final Section section) { -+ this.updateQueue.append(new UpdateQueue.UpdateQueueNode(section, null)); -+ } -+ -+ public boolean hasPendingUpdates() { -+ return !this.updateQueue.isEmpty(); -+ } -+ -+ // holds ticket lock for every chunk section represented by any position in the key set -+ // updates is modifiable and passed to processSchedulingUpdates after this call -+ protected abstract void processLevelUpdates(final Long2ByteLinkedOpenHashMap updates); -+ -+ // holds ticket lock for every chunk section represented by any position in the key set -+ // holds scheduling lock in max access radius for every position held by the ticket lock -+ // updates is cleared after this call -+ protected abstract void processSchedulingUpdates(final Long2ByteLinkedOpenHashMap updates, final List scheduledTasks, -+ final List changedFullStatus); -+ -+ // must hold ticket lock for every position in the sections in one radius around sectionX,sectionZ -+ public boolean performUpdate(final int sectionX, final int sectionZ, final ReentrantAreaLock schedulingLock, -+ final List scheduledTasks, final List changedFullStatus) { -+ if (!this.hasPendingUpdates()) { -+ return false; -+ } -+ -+ final Coordinate coordinate = new Coordinate(Coordinate.key(sectionX, sectionZ)); -+ final Section section = this.sections.get(coordinate); -+ -+ if (section == null || section.queuedSources.isEmpty()) { -+ // no section or no updates -+ return false; -+ } -+ -+ final Propagator propagator = Propagator.acquirePropagator(); -+ final boolean ret = this.performUpdate(section, null, propagator, -+ null, schedulingLock, scheduledTasks, changedFullStatus -+ ); -+ Propagator.returnPropagator(propagator); -+ return ret; -+ } -+ -+ private boolean performUpdate(final Section section, final UpdateQueue.UpdateQueueNode node, final Propagator propagator, -+ final ReentrantAreaLock ticketLock, final ReentrantAreaLock schedulingLock, -+ final List scheduledTasks, final List changedFullStatus) { -+ final int sectionX = section.sectionX; -+ final int sectionZ = section.sectionZ; -+ -+ final int rad1MinX = (sectionX - 1) << SECTION_SHIFT; -+ final int rad1MinZ = (sectionZ - 1) << SECTION_SHIFT; -+ final int rad1MaxX = ((sectionX + 1) << SECTION_SHIFT) | (SECTION_SIZE - 1); -+ final int rad1MaxZ = ((sectionZ + 1) << SECTION_SHIFT) | (SECTION_SIZE - 1); -+ -+ // set up encode offset first as we need to queue level changes _before_ -+ propagator.setupEncodeOffset(sectionX, sectionZ); -+ -+ final int coordinateOffset = propagator.coordinateOffset; -+ -+ final ReentrantAreaLock.Node ticketNode = ticketLock == null ? null : ticketLock.lock(rad1MinX, rad1MinZ, rad1MaxX, rad1MaxZ); -+ final boolean ret; -+ try { -+ // first, check if this update was stolen -+ if (section != this.sections.get(new Coordinate(sectionX, sectionZ))) { -+ // occurs when a stolen update deletes this section -+ // it is possible that another update is scheduled, but that one will have the correct section -+ if (node != null) { -+ this.updateQueue.remove(node); -+ } -+ return false; -+ } -+ -+ final int oldSourceSize = section.sources.size(); -+ -+ // process pending sources -+ for (final Iterator iterator = section.queuedSources.short2ByteEntrySet().fastIterator(); iterator.hasNext();) { -+ final Short2ByteMap.Entry entry = iterator.next(); -+ final int pos = (int)entry.getShortKey(); -+ final int posX = (pos & (SECTION_SIZE - 1)) | (sectionX << SECTION_SHIFT); -+ final int posZ = ((pos >> SECTION_SHIFT) & (SECTION_SIZE - 1)) | (sectionZ << SECTION_SHIFT); -+ final int newSource = (int)entry.getByteValue(); -+ -+ final short currentEncoded = section.levels[pos]; -+ final int currLevel = currentEncoded & 0xFF; -+ final int prevSource = (currentEncoded >>> 8) & 0xFF; -+ -+ if (prevSource == newSource) { -+ // nothing changed -+ continue; -+ } -+ -+ if ((prevSource < currLevel && newSource <= currLevel) || newSource == currLevel) { -+ // just update the source, don't need to propagate change -+ section.levels[pos] = (short)(currLevel | (newSource << 8)); -+ // level is unchanged, don't add to changed positions -+ } else { -+ // set current level and current source to new source -+ section.levels[pos] = (short)(newSource | (newSource << 8)); -+ // must add to updated positions in case this is final -+ propagator.updatedPositions.put(Coordinate.key(posX, posZ), (byte)newSource); -+ if (newSource != 0) { -+ // queue increase with new source level -+ propagator.appendToIncreaseQueue( -+ ((long)(posX + (posZ << Propagator.COORDINATE_BITS) + coordinateOffset) & ((1L << (Propagator.COORDINATE_BITS + Propagator.COORDINATE_BITS)) - 1)) | -+ ((newSource & (LEVEL_COUNT - 1L)) << (Propagator.COORDINATE_BITS + Propagator.COORDINATE_BITS)) | -+ (Propagator.ALL_DIRECTIONS_BITSET << (Propagator.COORDINATE_BITS + Propagator.COORDINATE_BITS + LEVEL_BITS)) -+ ); -+ } -+ // queue decrease with previous level -+ if (newSource < currLevel) { -+ propagator.appendToDecreaseQueue( -+ ((long)(posX + (posZ << Propagator.COORDINATE_BITS) + coordinateOffset) & ((1L << (Propagator.COORDINATE_BITS + Propagator.COORDINATE_BITS)) - 1)) | -+ ((currLevel & (LEVEL_COUNT - 1L)) << (Propagator.COORDINATE_BITS + Propagator.COORDINATE_BITS)) | -+ (Propagator.ALL_DIRECTIONS_BITSET << (Propagator.COORDINATE_BITS + Propagator.COORDINATE_BITS + LEVEL_BITS)) -+ ); -+ } -+ } -+ -+ if (newSource == 0) { -+ // prevSource != newSource, so we are removing this source -+ section.sources.remove((short)pos); -+ } else if (prevSource == 0) { -+ // prevSource != newSource, so we are adding this source -+ section.sources.add((short)pos); -+ } -+ } -+ -+ section.queuedSources.clear(); -+ -+ final int newSourceSize = section.sources.size(); -+ -+ if (oldSourceSize == 0 && newSourceSize != 0) { -+ // need to make sure the sections in 1 radius are initialised -+ for (int dz = -1; dz <= 1; ++dz) { -+ for (int dx = -1; dx <= 1; ++dx) { -+ if ((dx | dz) == 0) { -+ continue; -+ } -+ final int offX = dx + sectionX; -+ final int offZ = dz + sectionZ; -+ final Coordinate coordinate = new Coordinate(offX, offZ); -+ final Section neighbour = this.sections.computeIfAbsent(coordinate, (final Coordinate keyInMap) -> { -+ return new Section(Coordinate.x(keyInMap.key), Coordinate.z(keyInMap.key)); -+ }); -+ -+ // increase ref count -+ ++neighbour.oneRadNeighboursWithSources; -+ if (neighbour.oneRadNeighboursWithSources <= 0 || neighbour.oneRadNeighboursWithSources > 8) { -+ throw new IllegalStateException(Integer.toString(neighbour.oneRadNeighboursWithSources)); -+ } -+ } -+ } -+ } -+ -+ if (propagator.hasUpdates()) { -+ propagator.setupCaches(this, sectionX, sectionZ, 1); -+ propagator.performDecrease(); -+ // don't need try-finally, as any exception will cause the propagator to not be returned -+ propagator.destroyCaches(); -+ } -+ -+ if (newSourceSize == 0) { -+ final boolean decrementRef = oldSourceSize != 0; -+ // check for section de-init -+ for (int dz = -1; dz <= 1; ++dz) { -+ for (int dx = -1; dx <= 1; ++dx) { -+ final int offX = dx + sectionX; -+ final int offZ = dz + sectionZ; -+ final Coordinate coordinate = new Coordinate(offX, offZ); -+ final Section neighbour = this.sections.get(coordinate); -+ -+ if (neighbour == null) { -+ if (oldSourceSize == 0 && (dx | dz) != 0) { -+ // since we don't have sources, this section is allowed to null -+ continue; -+ } -+ throw new IllegalStateException("??"); -+ } -+ -+ if (decrementRef && (dx | dz) != 0) { -+ // decrease ref count, but only for neighbours -+ --neighbour.oneRadNeighboursWithSources; -+ } -+ -+ // we need to check the current section for de-init as well -+ if (neighbour.oneRadNeighboursWithSources == 0) { -+ if (neighbour.queuedSources.isEmpty() && neighbour.sources.isEmpty()) { -+ // need to de-init -+ this.sections.remove(coordinate); -+ } // else: neighbour is queued for an update, and it will de-init itself -+ } else if (neighbour.oneRadNeighboursWithSources < 0 || neighbour.oneRadNeighboursWithSources > 8) { -+ throw new IllegalStateException(Integer.toString(neighbour.oneRadNeighboursWithSources)); -+ } -+ } -+ } -+ } -+ -+ -+ ret = !propagator.updatedPositions.isEmpty(); -+ -+ if (ret) { -+ this.processLevelUpdates(propagator.updatedPositions); -+ -+ if (!propagator.updatedPositions.isEmpty()) { -+ // now we can actually update the ticket levels in the chunk holders -+ final int maxScheduleRadius = 2 * ChunkTaskScheduler.getMaxAccessRadius(); -+ -+ // allow the chunkholders to process ticket level updates without needing to acquire the schedule lock every time -+ final ReentrantAreaLock.Node schedulingNode = schedulingLock.lock( -+ rad1MinX - maxScheduleRadius, rad1MinZ - maxScheduleRadius, -+ rad1MaxX + maxScheduleRadius, rad1MaxZ + maxScheduleRadius -+ ); -+ try { -+ this.processSchedulingUpdates(propagator.updatedPositions, scheduledTasks, changedFullStatus); -+ } finally { -+ schedulingLock.unlock(schedulingNode); -+ } -+ } -+ -+ propagator.updatedPositions.clear(); -+ } -+ } finally { -+ if (ticketLock != null) { -+ ticketLock.unlock(ticketNode); -+ } -+ } -+ -+ // finished -+ if (node != null) { -+ this.updateQueue.remove(node); -+ } -+ -+ return ret; -+ } -+ -+ public boolean performUpdates(final ReentrantAreaLock ticketLock, final ReentrantAreaLock schedulingLock, -+ final List scheduledTasks, final List changedFullStatus) { -+ if (this.updateQueue.isEmpty()) { -+ return false; -+ } -+ -+ final long maxOrder = this.updateQueue.getLastOrder(); -+ -+ boolean updated = false; -+ Propagator propagator = null; -+ -+ for (;;) { -+ final UpdateQueue.UpdateQueueNode toUpdate = this.updateQueue.acquireNextToUpdate(maxOrder); -+ if (toUpdate == null) { -+ this.updateQueue.awaitFirst(maxOrder); -+ -+ if (!this.updateQueue.hasRemainingUpdates(maxOrder)) { -+ if (propagator != null) { -+ Propagator.returnPropagator(propagator); -+ } -+ return updated; -+ } -+ -+ continue; -+ } -+ -+ if (propagator == null) { -+ propagator = Propagator.acquirePropagator(); -+ } -+ -+ updated |= this.performUpdate(toUpdate.section, toUpdate, propagator, ticketLock, schedulingLock, scheduledTasks, changedFullStatus); -+ } -+ } -+ -+ private static final class UpdateQueue { -+ -+ private volatile UpdateQueueNode head; -+ private volatile UpdateQueueNode tail; -+ private volatile UpdateQueueNode lastUpdating; -+ -+ protected static final VarHandle HEAD_HANDLE = ConcurrentUtil.getVarHandle(UpdateQueue.class, "head", UpdateQueueNode.class); -+ protected static final VarHandle TAIL_HANDLE = ConcurrentUtil.getVarHandle(UpdateQueue.class, "tail", UpdateQueueNode.class); -+ protected static final VarHandle LAST_UPDATING = ConcurrentUtil.getVarHandle(UpdateQueue.class, "lastUpdating", UpdateQueueNode.class); -+ -+ /* head */ -+ -+ protected final void setHeadPlain(final UpdateQueueNode newHead) { -+ HEAD_HANDLE.set(this, newHead); -+ } -+ -+ protected final void setHeadOpaque(final UpdateQueueNode newHead) { -+ HEAD_HANDLE.setOpaque(this, newHead); -+ } -+ -+ protected final UpdateQueueNode getHeadPlain() { -+ return (UpdateQueueNode)HEAD_HANDLE.get(this); -+ } -+ -+ protected final UpdateQueueNode getHeadOpaque() { -+ return (UpdateQueueNode)HEAD_HANDLE.getOpaque(this); -+ } -+ -+ protected final UpdateQueueNode getHeadAcquire() { -+ return (UpdateQueueNode)HEAD_HANDLE.getAcquire(this); -+ } -+ -+ /* tail */ -+ -+ protected final void setTailPlain(final UpdateQueueNode newTail) { -+ TAIL_HANDLE.set(this, newTail); -+ } -+ -+ protected final void setTailOpaque(final UpdateQueueNode newTail) { -+ TAIL_HANDLE.setOpaque(this, newTail); -+ } -+ -+ protected final UpdateQueueNode getTailPlain() { -+ return (UpdateQueueNode)TAIL_HANDLE.get(this); -+ } -+ -+ protected final UpdateQueueNode getTailOpaque() { -+ return (UpdateQueueNode)TAIL_HANDLE.getOpaque(this); -+ } -+ -+ /* lastUpdating */ -+ -+ protected final UpdateQueueNode getLastUpdatingVolatile() { -+ return (UpdateQueueNode)LAST_UPDATING.getVolatile(this); -+ } -+ -+ protected final UpdateQueueNode compareAndExchangeLastUpdatingVolatile(final UpdateQueueNode expect, final UpdateQueueNode update) { -+ return (UpdateQueueNode)LAST_UPDATING.compareAndExchange(this, expect, update); -+ } -+ -+ public UpdateQueue() { -+ final UpdateQueueNode dummy = new UpdateQueueNode(null, null); -+ dummy.order = -1L; -+ dummy.preventAdds(); -+ -+ this.setHeadPlain(dummy); -+ this.setTailPlain(dummy); -+ } -+ -+ public boolean isEmpty() { -+ return this.peek() == null; -+ } -+ -+ public boolean hasRemainingUpdates(final long maxUpdate) { -+ final UpdateQueueNode node = this.peek(); -+ return node != null && node.order <= maxUpdate; -+ } -+ -+ public long getLastOrder() { -+ for (UpdateQueueNode tail = this.getTailOpaque(), curr = tail;;) { -+ final UpdateQueueNode next = curr.getNextVolatile(); -+ if (next == null) { -+ // try to update stale tail -+ if (this.getTailOpaque() == tail && curr != tail) { -+ this.setTailOpaque(curr); -+ } -+ return curr.order; -+ } -+ curr = next; -+ } -+ } -+ -+ public UpdateQueueNode acquireNextToUpdate(final long maxOrder) { -+ int failures = 0; -+ for (UpdateQueueNode prev = this.getLastUpdatingVolatile();;) { -+ UpdateQueueNode next = prev == null ? this.peek() : prev.next; -+ -+ if (next == null || next.order > maxOrder) { -+ return null; -+ } -+ -+ for (int i = 0; i < failures; ++i) { -+ ConcurrentUtil.backoff(); -+ } -+ -+ if (prev == (prev = this.compareAndExchangeLastUpdatingVolatile(prev, next))) { -+ return next; -+ } -+ -+ ++failures; -+ } -+ } -+ -+ public void awaitFirst(final long maxOrder) { -+ final UpdateQueueNode earliest = this.peek(); -+ if (earliest == null || earliest.order > maxOrder) { -+ return; -+ } -+ -+ final Thread currThread = Thread.currentThread(); -+ // we do not use add-blocking because we use the nullability of the section to block -+ // remove() does not begin to poll from the wait queue until the section is null'd, -+ // and so provided we check the nullability before parking there is no ordering of these operations -+ // such that remove() finishes polling from the wait queue while section is not null -+ earliest.add(currThread); -+ -+ // wait until completed -+ while (earliest.getSectionVolatile() != null) { -+ LockSupport.park(); -+ } -+ } -+ -+ public UpdateQueueNode peek() { -+ for (UpdateQueueNode head = this.getHeadOpaque(), curr = head;;) { -+ final UpdateQueueNode next = curr.getNextVolatile(); -+ final Section element = curr.getSectionVolatile(); /* Likely in sync */ -+ -+ if (element != null) { -+ if (this.getHeadOpaque() == head && curr != head) { -+ this.setHeadOpaque(curr); -+ } -+ return curr; -+ } -+ -+ if (next == null) { -+ if (this.getHeadOpaque() == head && curr != head) { -+ this.setHeadOpaque(curr); -+ } -+ return null; -+ } -+ curr = next; -+ } -+ } -+ -+ public void remove(final UpdateQueueNode node) { -+ // mark as removed -+ node.setSectionVolatile(null); -+ -+ // use peek to advance head -+ this.peek(); -+ -+ // unpark any waiters / block the wait queue -+ Thread unpark; -+ while ((unpark = node.poll()) != null) { -+ LockSupport.unpark(unpark); -+ } -+ } -+ -+ public void append(final UpdateQueueNode node) { -+ int failures = 0; -+ -+ for (UpdateQueueNode currTail = this.getTailOpaque(), curr = currTail;;) { -+ /* It has been experimentally shown that placing the read before the backoff results in significantly greater performance */ -+ /* It is likely due to a cache miss caused by another write to the next field */ -+ final UpdateQueueNode next = curr.getNextVolatile(); -+ -+ for (int i = 0; i < failures; ++i) { -+ ConcurrentUtil.backoff(); -+ } -+ -+ if (next == null) { -+ node.order = curr.order + 1L; -+ final UpdateQueueNode compared = curr.compareExchangeNextVolatile(null, node); -+ -+ if (compared == null) { -+ /* Added */ -+ /* Avoid CASing on tail more than we need to */ -+ /* CAS to avoid setting an out-of-date tail */ -+ if (this.getTailOpaque() == currTail) { -+ this.setTailOpaque(node); -+ } -+ return; -+ } -+ -+ ++failures; -+ curr = compared; -+ continue; -+ } -+ -+ if (curr == currTail) { -+ /* Tail is likely not up-to-date */ -+ curr = next; -+ } else { -+ /* Try to update to tail */ -+ if (currTail == (currTail = this.getTailOpaque())) { -+ curr = next; -+ } else { -+ curr = currTail; -+ } -+ } -+ } -+ } -+ -+ // each node also represents a set of waiters, represented by the MTQ -+ // if the queue is add-blocked, then the update is complete -+ private static final class UpdateQueueNode extends MultiThreadedQueue { -+ private long order; -+ private Section section; -+ private volatile UpdateQueueNode next; -+ -+ protected static final VarHandle SECTION_HANDLE = ConcurrentUtil.getVarHandle(UpdateQueueNode.class, "section", Section.class); -+ protected static final VarHandle NEXT_HANDLE = ConcurrentUtil.getVarHandle(UpdateQueueNode.class, "next", UpdateQueueNode.class); -+ -+ public UpdateQueueNode(final Section section, final UpdateQueueNode next) { -+ SECTION_HANDLE.set(this, section); -+ NEXT_HANDLE.set(this, next); -+ } -+ -+ /* section */ -+ -+ protected final Section getSectionPlain() { -+ return (Section)SECTION_HANDLE.get(this); -+ } -+ -+ protected final Section getSectionVolatile() { -+ return (Section)SECTION_HANDLE.getVolatile(this); -+ } -+ -+ protected final void setSectionPlain(final Section update) { -+ SECTION_HANDLE.set(this, update); -+ } -+ -+ protected final void setSectionOpaque(final Section update) { -+ SECTION_HANDLE.setOpaque(this, update); -+ } -+ -+ protected final void setSectionVolatile(final Section update) { -+ SECTION_HANDLE.setVolatile(this, update); -+ } -+ -+ protected final Section getAndSetSectionVolatile(final Section update) { -+ return (Section)SECTION_HANDLE.getAndSet(this, update); -+ } -+ -+ protected final Section compareExchangeSectionVolatile(final Section expect, final Section update) { -+ return (Section)SECTION_HANDLE.compareAndExchange(this, expect, update); -+ } -+ -+ /* next */ -+ -+ protected final UpdateQueueNode getNextPlain() { -+ return (UpdateQueueNode)NEXT_HANDLE.get(this); -+ } -+ -+ protected final UpdateQueueNode getNextOpaque() { -+ return (UpdateQueueNode)NEXT_HANDLE.getOpaque(this); -+ } -+ -+ protected final UpdateQueueNode getNextAcquire() { -+ return (UpdateQueueNode)NEXT_HANDLE.getAcquire(this); -+ } -+ -+ protected final UpdateQueueNode getNextVolatile() { -+ return (UpdateQueueNode)NEXT_HANDLE.getVolatile(this); -+ } -+ -+ protected final void setNextPlain(final UpdateQueueNode next) { -+ NEXT_HANDLE.set(this, next); -+ } -+ -+ protected final void setNextVolatile(final UpdateQueueNode next) { -+ NEXT_HANDLE.setVolatile(this, next); -+ } -+ -+ protected final UpdateQueueNode compareExchangeNextVolatile(final UpdateQueueNode expect, final UpdateQueueNode set) { -+ return (UpdateQueueNode)NEXT_HANDLE.compareAndExchange(this, expect, set); -+ } -+ } -+ } -+ -+ private static final class Section { -+ -+ // upper 8 bits: sources, lower 8 bits: level -+ // if we REALLY wanted to get crazy, we could make the increase propagator use MethodHandles#byteArrayViewVarHandle -+ // to read and write the lower 8 bits of this array directly rather than reading, updating the bits, then writing back. -+ private final short[] levels = new short[SECTION_SIZE * SECTION_SIZE]; -+ // set of local positions that represent sources -+ private final ShortOpenHashSet sources = new ShortOpenHashSet(); -+ // map of local index to new source level -+ // the source level _cannot_ be updated in the backing storage immediately since the update -+ private static final byte NO_QUEUED_UPDATE = (byte)-1; -+ private final Short2ByteLinkedOpenHashMap queuedSources = new Short2ByteLinkedOpenHashMap(); -+ { -+ this.queuedSources.defaultReturnValue(NO_QUEUED_UPDATE); -+ } -+ private int oneRadNeighboursWithSources = 0; -+ -+ public final int sectionX; -+ public final int sectionZ; -+ -+ public Section(final int sectionX, final int sectionZ) { -+ this.sectionX = sectionX; -+ this.sectionZ = sectionZ; -+ } -+ -+ public boolean isZero() { -+ for (final short val : this.levels) { -+ if (val != 0) { -+ return false; -+ } -+ } -+ return true; -+ } -+ -+ @Override -+ public String toString() { -+ final StringBuilder ret = new StringBuilder(); -+ -+ for (int x = 0; x < SECTION_SIZE; ++x) { -+ ret.append("levels x=").append(x).append("\n"); -+ for (int z = 0; z < SECTION_SIZE; ++z) { -+ final short v = this.levels[x | (z << SECTION_SHIFT)]; -+ ret.append(v & 0xFF).append("."); -+ } -+ ret.append("\n"); -+ ret.append("sources x=").append(x).append("\n"); -+ for (int z = 0; z < SECTION_SIZE; ++z) { -+ final short v = this.levels[x | (z << SECTION_SHIFT)]; -+ ret.append((v >>> 8) & 0xFF).append("."); -+ } -+ ret.append("\n\n"); -+ } -+ -+ return ret.toString(); -+ } -+ } -+ -+ -+ private static final class Propagator { -+ -+ private static final ArrayDeque CACHED_PROPAGATORS = new ArrayDeque<>(); -+ private static final int MAX_PROPAGATORS = Runtime.getRuntime().availableProcessors() * 2; -+ -+ private static Propagator acquirePropagator() { -+ synchronized (CACHED_PROPAGATORS) { -+ final Propagator ret = CACHED_PROPAGATORS.pollFirst(); -+ if (ret != null) { -+ return ret; -+ } -+ } -+ return new Propagator(); -+ } -+ -+ private static void returnPropagator(final Propagator propagator) { -+ synchronized (CACHED_PROPAGATORS) { -+ if (CACHED_PROPAGATORS.size() < MAX_PROPAGATORS) { -+ CACHED_PROPAGATORS.add(propagator); -+ } -+ } -+ } -+ -+ private static final int SECTION_RADIUS = 2; -+ private static final int SECTION_CACHE_WIDTH = 2 * SECTION_RADIUS + 1; -+ // minimum number of bits to represent [0, SECTION_SIZE * SECTION_CACHE_WIDTH) -+ private static final int COORDINATE_BITS = 9; -+ private static final int COORDINATE_SIZE = 1 << COORDINATE_BITS; -+ static { -+ if ((SECTION_SIZE * SECTION_CACHE_WIDTH) > (1 << COORDINATE_BITS)) { -+ throw new IllegalStateException("Adjust COORDINATE_BITS"); -+ } -+ } -+ // index = x + (z * SECTION_CACHE_WIDTH) -+ // (this requires x >= 0 and z >= 0) -+ private final Section[] sections = new Section[SECTION_CACHE_WIDTH * SECTION_CACHE_WIDTH]; -+ -+ private int encodeOffsetX; -+ private int encodeOffsetZ; -+ -+ private int coordinateOffset; -+ -+ private int encodeSectionOffsetX; -+ private int encodeSectionOffsetZ; -+ -+ private int sectionIndexOffset; -+ -+ public final boolean hasUpdates() { -+ return this.decreaseQueueInitialLength != 0 || this.increaseQueueInitialLength != 0; -+ } -+ -+ protected final void setupEncodeOffset(final int centerSectionX, final int centerSectionZ) { -+ final int maxCoordinate = (SECTION_RADIUS * SECTION_SIZE - 1); -+ // must have that encoded >= 0 -+ // coordinates can range from [-maxCoordinate + centerSection*SECTION_SIZE, maxCoordinate + centerSection*SECTION_SIZE] -+ // we want a range of [0, maxCoordinate*2] -+ // so, 0 = -maxCoordinate + centerSection*SECTION_SIZE + offset -+ this.encodeOffsetX = maxCoordinate - (centerSectionX << SECTION_SHIFT); -+ this.encodeOffsetZ = maxCoordinate - (centerSectionZ << SECTION_SHIFT); -+ -+ // encoded coordinates range from [0, SECTION_SIZE * SECTION_CACHE_WIDTH) -+ // coordinate index = (x + encodeOffsetX) + ((z + encodeOffsetZ) << COORDINATE_BITS) -+ this.coordinateOffset = this.encodeOffsetX + (this.encodeOffsetZ << COORDINATE_BITS); -+ -+ // need encoded values to be >= 0 -+ // so, 0 = (-SECTION_RADIUS + centerSectionX) + encodeOffset -+ this.encodeSectionOffsetX = SECTION_RADIUS - centerSectionX; -+ this.encodeSectionOffsetZ = SECTION_RADIUS - centerSectionZ; -+ -+ // section index = (secX + encodeSectionOffsetX) + ((secZ + encodeSectionOffsetZ) * SECTION_CACHE_WIDTH) -+ this.sectionIndexOffset = this.encodeSectionOffsetX + (this.encodeSectionOffsetZ * SECTION_CACHE_WIDTH); -+ } -+ -+ // must hold ticket lock for (centerSectionX,centerSectionZ) in radius rad -+ // must call setupEncodeOffset -+ protected final void setupCaches(final ThreadedTicketLevelPropagator propagator, -+ final int centerSectionX, final int centerSectionZ, -+ final int rad) { -+ for (int dz = -rad; dz <= rad; ++dz) { -+ for (int dx = -rad; dx <= rad; ++dx) { -+ final int sectionX = centerSectionX + dx; -+ final int sectionZ = centerSectionZ + dz; -+ final Coordinate coordinate = new Coordinate(sectionX, sectionZ); -+ final Section section = propagator.sections.get(coordinate); -+ -+ if (section == null) { -+ throw new IllegalStateException("Section at " + coordinate + " should not be null"); -+ } -+ -+ this.setSectionInCache(sectionX, sectionZ, section); -+ } -+ } -+ } -+ -+ protected final void setSectionInCache(final int sectionX, final int sectionZ, final Section section) { -+ this.sections[sectionX + SECTION_CACHE_WIDTH*sectionZ + this.sectionIndexOffset] = section; -+ } -+ -+ protected final Section getSection(final int sectionX, final int sectionZ) { -+ return this.sections[sectionX + SECTION_CACHE_WIDTH*sectionZ + this.sectionIndexOffset]; -+ } -+ -+ protected final int getLevel(final int posX, final int posZ) { -+ final Section section = this.sections[(posX >> SECTION_SHIFT) + SECTION_CACHE_WIDTH*(posZ >> SECTION_SHIFT) + this.sectionIndexOffset]; -+ if (section != null) { -+ return (int)section.levels[(posX & (SECTION_SIZE - 1)) | ((posZ & (SECTION_SIZE - 1)) << SECTION_SHIFT)] & 0xFF; -+ } -+ -+ return 0; -+ } -+ -+ protected final void setLevel(final int posX, final int posZ, final int to) { -+ final Section section = this.sections[(posX >> SECTION_SHIFT) + SECTION_CACHE_WIDTH*(posZ >> SECTION_SHIFT) + this.sectionIndexOffset]; -+ if (section != null) { -+ final int index = (posX & (SECTION_SIZE - 1)) | ((posZ & (SECTION_SIZE - 1)) << SECTION_SHIFT); -+ final short level = section.levels[index]; -+ section.levels[index] = (short)((level & ~0xFF) | (to & 0xFF)); -+ this.updatedPositions.put(Coordinate.key(posX, posZ), (byte)to); -+ } -+ } -+ -+ protected final void destroyCaches() { -+ Arrays.fill(this.sections, null); -+ } -+ -+ // contains: -+ // lower (COORDINATE_BITS(9) + COORDINATE_BITS(9) = 18) bits encoded position: (x | (z << COORDINATE_BITS)) -+ // next LEVEL_BITS (6) bits: propagated level [0, 63] -+ // propagation directions bitset (16 bits): -+ protected static final long ALL_DIRECTIONS_BITSET = ( -+ // z = -1 -+ (1L << ((1 - 1) | ((1 - 1) << 2))) | -+ (1L << ((1 + 0) | ((1 - 1) << 2))) | -+ (1L << ((1 + 1) | ((1 - 1) << 2))) | -+ -+ // z = 0 -+ (1L << ((1 - 1) | ((1 + 0) << 2))) | -+ //(1L << ((1 + 0) | ((1 + 0) << 2))) | // exclude (0,0) -+ (1L << ((1 + 1) | ((1 + 0) << 2))) | -+ -+ // z = 1 -+ (1L << ((1 - 1) | ((1 + 1) << 2))) | -+ (1L << ((1 + 0) | ((1 + 1) << 2))) | -+ (1L << ((1 + 1) | ((1 + 1) << 2))) -+ ); -+ -+ private void ex(int bitset) { -+ for (int i = 0, len = Integer.bitCount(bitset); i < len; ++i) { -+ final int set = Integer.numberOfTrailingZeros(bitset); -+ final int tailingBit = (-bitset) & bitset; -+ // XOR to remove the trailing bit -+ bitset ^= tailingBit; -+ -+ // the encoded value set is (x_val) | (z_val << 2), totaling 4 bits -+ // thus, the bitset is 16 bits wide where each one represents a direction to propagate and the -+ // index of the set bit is the encoded value -+ // the encoded coordinate has 3 valid states: -+ // 0b00 (0) -> -1 -+ // 0b01 (1) -> 0 -+ // 0b10 (2) -> 1 -+ // the decode operation then is val - 1, and the encode operation is val + 1 -+ final int xOff = (set & 3) - 1; -+ final int zOff = ((set >>> 2) & 3) - 1; -+ System.out.println("Encoded: (" + xOff + "," + zOff + ")"); -+ } -+ } -+ -+ private void ch(long bs, int shift) { -+ int bitset = (int)(bs >>> shift); -+ for (int i = 0, len = Integer.bitCount(bitset); i < len; ++i) { -+ final int set = Integer.numberOfTrailingZeros(bitset); -+ final int tailingBit = (-bitset) & bitset; -+ // XOR to remove the trailing bit -+ bitset ^= tailingBit; -+ -+ // the encoded value set is (x_val) | (z_val << 2), totaling 4 bits -+ // thus, the bitset is 16 bits wide where each one represents a direction to propagate and the -+ // index of the set bit is the encoded value -+ // the encoded coordinate has 3 valid states: -+ // 0b00 (0) -> -1 -+ // 0b01 (1) -> 0 -+ // 0b10 (2) -> 1 -+ // the decode operation then is val - 1, and the encode operation is val + 1 -+ final int xOff = (set & 3) - 1; -+ final int zOff = ((set >>> 2) & 3) - 1; -+ if (Math.abs(xOff) > 1 || Math.abs(zOff) > 1 || (xOff | zOff) == 0) { -+ throw new IllegalStateException(); -+ } -+ } -+ } -+ -+ // whether the increase propagator needs to write the propagated level to the position, used to avoid cascading -+ // updates for sources -+ protected static final long FLAG_WRITE_LEVEL = Long.MIN_VALUE >>> 1; -+ // whether the propagation needs to check if its current level is equal to the expected level -+ // used only in increase propagation -+ protected static final long FLAG_RECHECK_LEVEL = Long.MIN_VALUE >>> 0; -+ -+ protected long[] increaseQueue = new long[SECTION_SIZE * SECTION_SIZE * 2]; -+ protected int increaseQueueInitialLength; -+ protected long[] decreaseQueue = new long[SECTION_SIZE * SECTION_SIZE * 2]; -+ protected int decreaseQueueInitialLength; -+ -+ protected final Long2ByteLinkedOpenHashMap updatedPositions = new Long2ByteLinkedOpenHashMap(); -+ -+ protected final long[] resizeIncreaseQueue() { -+ return this.increaseQueue = Arrays.copyOf(this.increaseQueue, this.increaseQueue.length * 2); -+ } -+ -+ protected final long[] resizeDecreaseQueue() { -+ return this.decreaseQueue = Arrays.copyOf(this.decreaseQueue, this.decreaseQueue.length * 2); -+ } -+ -+ protected final void appendToIncreaseQueue(final long value) { -+ final int idx = this.increaseQueueInitialLength++; -+ long[] queue = this.increaseQueue; -+ if (idx >= queue.length) { -+ queue = this.resizeIncreaseQueue(); -+ queue[idx] = value; -+ return; -+ } else { -+ queue[idx] = value; -+ return; -+ } -+ } -+ -+ protected final void appendToDecreaseQueue(final long value) { -+ final int idx = this.decreaseQueueInitialLength++; -+ long[] queue = this.decreaseQueue; -+ if (idx >= queue.length) { -+ queue = this.resizeDecreaseQueue(); -+ queue[idx] = value; -+ return; -+ } else { -+ queue[idx] = value; -+ return; -+ } -+ } -+ -+ protected final void performIncrease() { -+ long[] queue = this.increaseQueue; -+ int queueReadIndex = 0; -+ int queueLength = this.increaseQueueInitialLength; -+ this.increaseQueueInitialLength = 0; -+ final int decodeOffsetX = -this.encodeOffsetX; -+ final int decodeOffsetZ = -this.encodeOffsetZ; -+ final int encodeOffset = this.coordinateOffset; -+ final int sectionOffset = this.sectionIndexOffset; -+ -+ final Long2ByteLinkedOpenHashMap updatedPositions = this.updatedPositions; -+ -+ while (queueReadIndex < queueLength) { -+ final long queueValue = queue[queueReadIndex++]; -+ -+ final int posX = ((int)queueValue & (COORDINATE_SIZE - 1)) + decodeOffsetX; -+ final int posZ = (((int)queueValue >>> COORDINATE_BITS) & (COORDINATE_SIZE - 1)) + decodeOffsetZ; -+ final int propagatedLevel = ((int)queueValue >>> (COORDINATE_BITS + COORDINATE_BITS)) & (LEVEL_COUNT - 1); -+ // note: the above code requires coordinate bits * 2 < 32 -+ // bitset is 16 bits -+ int propagateDirectionBitset = (int)(queueValue >>> (COORDINATE_BITS + COORDINATE_BITS + LEVEL_BITS)) & ((1 << 16) - 1); -+ -+ if ((queueValue & FLAG_RECHECK_LEVEL) != 0L) { -+ if (this.getLevel(posX, posZ) != propagatedLevel) { -+ // not at the level we expect, so something changed. -+ continue; -+ } -+ } else if ((queueValue & FLAG_WRITE_LEVEL) != 0L) { -+ // these are used to restore sources after a propagation decrease -+ this.setLevel(posX, posZ, propagatedLevel); -+ } -+ -+ // this bitset represents the values that we have not propagated to -+ // this bitset lets us determine what directions the neighbours we set should propagate to, in most cases -+ // significantly reducing the total number of ops -+ // since we propagate in a 1 radius, we need a 2 radius bitset to hold all possible values we would possibly need -+ // but if we use only 5x5 bits, then we need to use div/mod to retrieve coordinates from the bitset, so instead -+ // we use an 8x8 bitset and luckily that can be fit into only one long value (64 bits) -+ // to make things easy, we use positions [0, 4] in the bitset, with current position being 2 -+ // index = x | (z << 3) -+ -+ // to start, we eliminate everything 1 radius from the current position as the previous propagator -+ // must guarantee that either we propagate everything in 1 radius or we partially propagate for 1 radius -+ // but the rest not propagated are already handled -+ long currentPropagation = ~( -+ // z = -1 -+ (1L << ((2 - 1) | ((2 - 1) << 3))) | -+ (1L << ((2 + 0) | ((2 - 1) << 3))) | -+ (1L << ((2 + 1) | ((2 - 1) << 3))) | -+ -+ // z = 0 -+ (1L << ((2 - 1) | ((2 + 0) << 3))) | -+ (1L << ((2 + 0) | ((2 + 0) << 3))) | -+ (1L << ((2 + 1) | ((2 + 0) << 3))) | -+ -+ // z = 1 -+ (1L << ((2 - 1) | ((2 + 1) << 3))) | -+ (1L << ((2 + 0) | ((2 + 1) << 3))) | -+ (1L << ((2 + 1) | ((2 + 1) << 3))) -+ ); -+ -+ final int toPropagate = propagatedLevel - 1; -+ -+ // we could use while (propagateDirectionBitset != 0), but it's not a predictable branch. By counting -+ // the bits, the cpu loop predictor should perfectly predict the loop. -+ for (int l = 0, len = Integer.bitCount(propagateDirectionBitset); l < len; ++l) { -+ final int set = Integer.numberOfTrailingZeros(propagateDirectionBitset); -+ final int tailingBit = (-propagateDirectionBitset) & propagateDirectionBitset; -+ propagateDirectionBitset ^= tailingBit; -+ -+ // pDecode is from [0, 2], and 1 must be subtracted to fully decode the offset -+ // it has been split to save some cycles via parallelism -+ final int pDecodeX = (set & 3); -+ final int pDecodeZ = ((set >>> 2) & 3); -+ -+ // re-ordered -1 on the position decode into pos - 1 to occur in parallel with determining pDecodeX -+ final int offX = (posX - 1) + pDecodeX; -+ final int offZ = (posZ - 1) + pDecodeZ; -+ -+ final int sectionIndex = (offX >> SECTION_SHIFT) + ((offZ >> SECTION_SHIFT) * SECTION_CACHE_WIDTH) + sectionOffset; -+ final int localIndex = (offX & (SECTION_SIZE - 1)) | ((offZ & (SECTION_SIZE - 1)) << SECTION_SHIFT); -+ -+ // to retrieve a set of bits from a long value: (n_bitmask << (nstartidx)) & bitset -+ // bitset idx = x | (z << 3) -+ -+ // read three bits, so we need 7L -+ // note that generally: off - pos = (pos - 1) + pDecode - pos = pDecode - 1 -+ // nstartidx1 = x rel -1 for z rel -1 -+ // = (offX - posX - 1 + 2) | ((offZ - posZ - 1 + 2) << 3) -+ // = (pDecodeX - 1 - 1 + 2) | ((pDecodeZ - 1 - 1 + 2) << 3) -+ // = pDecodeX | (pDecodeZ << 3) = start -+ final int start = pDecodeX | (pDecodeZ << 3); -+ final long bitsetLine1 = currentPropagation & (7L << (start)); -+ -+ // nstartidx2 = x rel -1 for z rel 0 = line after line1, so we can just add 8 (row length of bitset) -+ final long bitsetLine2 = currentPropagation & (7L << (start + 8)); -+ -+ // nstartidx2 = x rel -1 for z rel 0 = line after line2, so we can just add 8 (row length of bitset) -+ final long bitsetLine3 = currentPropagation & (7L << (start + (8 + 8))); -+ -+ // remove ("take") lines from bitset -+ currentPropagation ^= (bitsetLine1 | bitsetLine2 | bitsetLine3); -+ -+ // now try to propagate -+ final Section section = this.sections[sectionIndex]; -+ -+ // lower 8 bits are current level, next upper 7 bits are source level, next 1 bit is updated source flag -+ final short currentStoredLevel = section.levels[localIndex]; -+ final int currentLevel = currentStoredLevel & 0xFF; -+ -+ if (currentLevel >= toPropagate) { -+ continue; // already at the level we want -+ } -+ -+ // update level -+ section.levels[localIndex] = (short)((currentStoredLevel & ~0xFF) | (toPropagate & 0xFF)); -+ updatedPositions.putAndMoveToLast(Coordinate.key(offX, offZ), (byte)toPropagate); -+ -+ // queue next -+ if (toPropagate > 1) { -+ // now combine into one bitset to pass to child -+ // the child bitset is 4x4, so we just shift each line by 4 -+ // add the propagation bitset offset to each line to make it easy to OR it into the propagation queue value -+ final long childPropagation = -+ ((bitsetLine1 >>> (start)) << (COORDINATE_BITS + COORDINATE_BITS + LEVEL_BITS)) | // z = -1 -+ ((bitsetLine2 >>> (start + 8)) << (4 + COORDINATE_BITS + COORDINATE_BITS + LEVEL_BITS)) | // z = 0 -+ ((bitsetLine3 >>> (start + (8 + 8))) << (4 + 4 + COORDINATE_BITS + COORDINATE_BITS + LEVEL_BITS)); // z = 1 -+ -+ // don't queue update if toPropagate cannot propagate anything to neighbours -+ // (for increase, propagating 0 to neighbours is useless) -+ if (queueLength >= queue.length) { -+ queue = this.resizeIncreaseQueue(); -+ } -+ queue[queueLength++] = -+ ((long)(offX + (offZ << COORDINATE_BITS) + encodeOffset) & ((1L << (COORDINATE_BITS + COORDINATE_BITS)) - 1)) | -+ ((toPropagate & (LEVEL_COUNT - 1L)) << (COORDINATE_BITS + COORDINATE_BITS)) | -+ childPropagation; //(ALL_DIRECTIONS_BITSET << (COORDINATE_BITS + COORDINATE_BITS + LEVEL_BITS)); -+ continue; -+ } -+ continue; -+ } -+ } -+ } -+ -+ protected final void performDecrease() { -+ long[] queue = this.decreaseQueue; -+ long[] increaseQueue = this.increaseQueue; -+ int queueReadIndex = 0; -+ int queueLength = this.decreaseQueueInitialLength; -+ this.decreaseQueueInitialLength = 0; -+ int increaseQueueLength = this.increaseQueueInitialLength; -+ final int decodeOffsetX = -this.encodeOffsetX; -+ final int decodeOffsetZ = -this.encodeOffsetZ; -+ final int encodeOffset = this.coordinateOffset; -+ final int sectionOffset = this.sectionIndexOffset; -+ -+ final Long2ByteLinkedOpenHashMap updatedPositions = this.updatedPositions; -+ -+ while (queueReadIndex < queueLength) { -+ final long queueValue = queue[queueReadIndex++]; -+ -+ final int posX = ((int)queueValue & (COORDINATE_SIZE - 1)) + decodeOffsetX; -+ final int posZ = (((int)queueValue >>> COORDINATE_BITS) & (COORDINATE_SIZE - 1)) + decodeOffsetZ; -+ final int propagatedLevel = ((int)queueValue >>> (COORDINATE_BITS + COORDINATE_BITS)) & (LEVEL_COUNT - 1); -+ // note: the above code requires coordinate bits * 2 < 32 -+ // bitset is 16 bits -+ int propagateDirectionBitset = (int)(queueValue >>> (COORDINATE_BITS + COORDINATE_BITS + LEVEL_BITS)) & ((1 << 16) - 1); -+ -+ // this bitset represents the values that we have not propagated to -+ // this bitset lets us determine what directions the neighbours we set should propagate to, in most cases -+ // significantly reducing the total number of ops -+ // since we propagate in a 1 radius, we need a 2 radius bitset to hold all possible values we would possibly need -+ // but if we use only 5x5 bits, then we need to use div/mod to retrieve coordinates from the bitset, so instead -+ // we use an 8x8 bitset and luckily that can be fit into only one long value (64 bits) -+ // to make things easy, we use positions [0, 4] in the bitset, with current position being 2 -+ // index = x | (z << 3) -+ -+ // to start, we eliminate everything 1 radius from the current position as the previous propagator -+ // must guarantee that either we propagate everything in 1 radius or we partially propagate for 1 radius -+ // but the rest not propagated are already handled -+ long currentPropagation = ~( -+ // z = -1 -+ (1L << ((2 - 1) | ((2 - 1) << 3))) | -+ (1L << ((2 + 0) | ((2 - 1) << 3))) | -+ (1L << ((2 + 1) | ((2 - 1) << 3))) | -+ -+ // z = 0 -+ (1L << ((2 - 1) | ((2 + 0) << 3))) | -+ (1L << ((2 + 0) | ((2 + 0) << 3))) | -+ (1L << ((2 + 1) | ((2 + 0) << 3))) | -+ -+ // z = 1 -+ (1L << ((2 - 1) | ((2 + 1) << 3))) | -+ (1L << ((2 + 0) | ((2 + 1) << 3))) | -+ (1L << ((2 + 1) | ((2 + 1) << 3))) -+ ); -+ -+ final int toPropagate = propagatedLevel - 1; -+ -+ // we could use while (propagateDirectionBitset != 0), but it's not a predictable branch. By counting -+ // the bits, the cpu loop predictor should perfectly predict the loop. -+ for (int l = 0, len = Integer.bitCount(propagateDirectionBitset); l < len; ++l) { -+ final int set = Integer.numberOfTrailingZeros(propagateDirectionBitset); -+ final int tailingBit = (-propagateDirectionBitset) & propagateDirectionBitset; -+ propagateDirectionBitset ^= tailingBit; -+ -+ -+ // pDecode is from [0, 2], and 1 must be subtracted to fully decode the offset -+ // it has been split to save some cycles via parallelism -+ final int pDecodeX = (set & 3); -+ final int pDecodeZ = ((set >>> 2) & 3); -+ -+ // re-ordered -1 on the position decode into pos - 1 to occur in parallel with determining pDecodeX -+ final int offX = (posX - 1) + pDecodeX; -+ final int offZ = (posZ - 1) + pDecodeZ; -+ -+ final int sectionIndex = (offX >> SECTION_SHIFT) + ((offZ >> SECTION_SHIFT) * SECTION_CACHE_WIDTH) + sectionOffset; -+ final int localIndex = (offX & (SECTION_SIZE - 1)) | ((offZ & (SECTION_SIZE - 1)) << SECTION_SHIFT); -+ -+ // to retrieve a set of bits from a long value: (n_bitmask << (nstartidx)) & bitset -+ // bitset idx = x | (z << 3) -+ -+ // read three bits, so we need 7L -+ // note that generally: off - pos = (pos - 1) + pDecode - pos = pDecode - 1 -+ // nstartidx1 = x rel -1 for z rel -1 -+ // = (offX - posX - 1 + 2) | ((offZ - posZ - 1 + 2) << 3) -+ // = (pDecodeX - 1 - 1 + 2) | ((pDecodeZ - 1 - 1 + 2) << 3) -+ // = pDecodeX | (pDecodeZ << 3) = start -+ final int start = pDecodeX | (pDecodeZ << 3); -+ final long bitsetLine1 = currentPropagation & (7L << (start)); -+ -+ // nstartidx2 = x rel -1 for z rel 0 = line after line1, so we can just add 8 (row length of bitset) -+ final long bitsetLine2 = currentPropagation & (7L << (start + 8)); -+ -+ // nstartidx2 = x rel -1 for z rel 0 = line after line2, so we can just add 8 (row length of bitset) -+ final long bitsetLine3 = currentPropagation & (7L << (start + (8 + 8))); -+ -+ // now try to propagate -+ final Section section = this.sections[sectionIndex]; -+ -+ // lower 8 bits are current level, next upper 7 bits are source level, next 1 bit is updated source flag -+ final short currentStoredLevel = section.levels[localIndex]; -+ final int currentLevel = currentStoredLevel & 0xFF; -+ final int sourceLevel = (currentStoredLevel >>> 8) & 0xFF; -+ -+ if (currentLevel == 0) { -+ continue; // already at the level we want -+ } -+ -+ if (currentLevel > toPropagate) { -+ // it looks like another source propagated here, so re-propagate it -+ if (increaseQueueLength >= increaseQueue.length) { -+ increaseQueue = this.resizeIncreaseQueue(); -+ } -+ increaseQueue[increaseQueueLength++] = -+ ((long)(offX + (offZ << COORDINATE_BITS) + encodeOffset) & ((1L << (COORDINATE_BITS + COORDINATE_BITS)) - 1)) | -+ ((currentLevel & (LEVEL_COUNT - 1L)) << (COORDINATE_BITS + COORDINATE_BITS)) | -+ (FLAG_RECHECK_LEVEL | (ALL_DIRECTIONS_BITSET << (COORDINATE_BITS + COORDINATE_BITS + LEVEL_BITS))); -+ continue; -+ } -+ -+ // remove ("take") lines from bitset -+ // can't do this during decrease, TODO WHY? -+ //currentPropagation ^= (bitsetLine1 | bitsetLine2 | bitsetLine3); -+ -+ // update level -+ section.levels[localIndex] = (short)((currentStoredLevel & ~0xFF)); -+ updatedPositions.putAndMoveToLast(Coordinate.key(offX, offZ), (byte)0); -+ -+ if (sourceLevel != 0) { -+ // re-propagate source -+ // note: do not set recheck level, or else the propagation will fail -+ if (increaseQueueLength >= increaseQueue.length) { -+ increaseQueue = this.resizeIncreaseQueue(); -+ } -+ increaseQueue[increaseQueueLength++] = -+ ((long)(offX + (offZ << COORDINATE_BITS) + encodeOffset) & ((1L << (COORDINATE_BITS + COORDINATE_BITS)) - 1)) | -+ ((sourceLevel & (LEVEL_COUNT - 1L)) << (COORDINATE_BITS + COORDINATE_BITS)) | -+ (FLAG_WRITE_LEVEL | (ALL_DIRECTIONS_BITSET << (COORDINATE_BITS + COORDINATE_BITS + LEVEL_BITS))); -+ } -+ -+ // queue next -+ // note: targetLevel > 0 here, since toPropagate >= currentLevel and currentLevel > 0 -+ // now combine into one bitset to pass to child -+ // the child bitset is 4x4, so we just shift each line by 4 -+ // add the propagation bitset offset to each line to make it easy to OR it into the propagation queue value -+ final long childPropagation = -+ ((bitsetLine1 >>> (start)) << (COORDINATE_BITS + COORDINATE_BITS + LEVEL_BITS)) | // z = -1 -+ ((bitsetLine2 >>> (start + 8)) << (4 + COORDINATE_BITS + COORDINATE_BITS + LEVEL_BITS)) | // z = 0 -+ ((bitsetLine3 >>> (start + (8 + 8))) << (4 + 4 + COORDINATE_BITS + COORDINATE_BITS + LEVEL_BITS)); // z = 1 -+ -+ // don't queue update if toPropagate cannot propagate anything to neighbours -+ // (for increase, propagating 0 to neighbours is useless) -+ if (queueLength >= queue.length) { -+ queue = this.resizeDecreaseQueue(); -+ } -+ queue[queueLength++] = -+ ((long)(offX + (offZ << COORDINATE_BITS) + encodeOffset) & ((1L << (COORDINATE_BITS + COORDINATE_BITS)) - 1)) | -+ ((toPropagate & (LEVEL_COUNT - 1L)) << (COORDINATE_BITS + COORDINATE_BITS)) | -+ (ALL_DIRECTIONS_BITSET << (COORDINATE_BITS + COORDINATE_BITS + LEVEL_BITS)); //childPropagation; -+ continue; -+ } -+ } -+ -+ // propagate sources we clobbered -+ this.increaseQueueInitialLength = increaseQueueLength; -+ this.performIncrease(); -+ } -+ } -+ -+ private static final class Coordinate implements Comparable { -+ -+ public final long key; -+ -+ public Coordinate(final long key) { -+ this.key = key; -+ } -+ -+ public Coordinate(final int x, final int z) { -+ this.key = key(x, z); -+ } -+ -+ public static long key(final int x, final int z) { -+ return ((long)z << 32) | (x & 0xFFFFFFFFL); -+ } -+ -+ public static int x(final long key) { -+ return (int)key; -+ } -+ -+ public static int z(final long key) { -+ return (int)(key >>> 32); -+ } -+ -+ @Override -+ public int hashCode() { -+ return (int)HashCommon.mix(this.key); -+ } -+ -+ @Override -+ public boolean equals(final Object obj) { -+ if (this == obj) { -+ return true; -+ } -+ -+ if (!(obj instanceof Coordinate other)) { -+ return false; -+ } -+ -+ return this.key == other.key; -+ } -+ -+ // This class is intended for HashMap/ConcurrentHashMap usage, which do treeify bin nodes if the chain -+ // is too large. So we should implement compareTo to help. -+ @Override -+ public int compareTo(final Coordinate other) { -+ return Long.compare(this.key, other.key); -+ } -+ -+ @Override -+ public String toString() { -+ return "[" + x(this.key) + "," + z(this.key) + "]"; -+ } -+ } -+ -+ /* -+ private static final java.util.Random random = new java.util.Random(4L); -+ private static final List> walkers = -+ new java.util.ArrayList<>(); -+ static final int PLAYERS = 0; -+ static final int RAD_BLOCKS = 10000; -+ static final int RAD = RAD_BLOCKS >> 4; -+ static final int RAD_BIG_BLOCKS = 100_000; -+ static final int RAD_BIG = RAD_BIG_BLOCKS >> 4; -+ static final int VD = 4; -+ static final int BIG_PLAYERS = 50; -+ static final double WALK_CHANCE = 0.10; -+ static final double TP_CHANCE = 0.01; -+ static final int TP_BACK_PLAYERS = 200; -+ static final double TP_BACK_CHANCE = 0.25; -+ static final double TP_STEAL_CHANCE = 0.25; -+ private static final List> tpBack = -+ new java.util.ArrayList<>(); -+ -+ public static void main(final String[] args) { -+ final ReentrantAreaLock ticketLock = new ReentrantAreaLock(SECTION_SHIFT); -+ final ReentrantAreaLock schedulingLock = new ReentrantAreaLock(SECTION_SHIFT); -+ final Long2ByteLinkedOpenHashMap levelMap = new Long2ByteLinkedOpenHashMap(); -+ final Long2ByteLinkedOpenHashMap refMap = new Long2ByteLinkedOpenHashMap(); -+ final io.papermc.paper.util.misc.Delayed8WayDistancePropagator2D ref = new io.papermc.paper.util.misc.Delayed8WayDistancePropagator2D((final long coordinate, final byte oldLevel, final byte newLevel) -> { -+ if (newLevel == 0) { -+ refMap.remove(coordinate); -+ } else { -+ refMap.put(coordinate, newLevel); -+ } -+ }); -+ final ThreadedTicketLevelPropagator propagator = new ThreadedTicketLevelPropagator() { -+ @Override -+ protected void processLevelUpdates(Long2ByteLinkedOpenHashMap updates) { -+ for (final long key : updates.keySet()) { -+ final byte val = updates.get(key); -+ if (val == 0) { -+ levelMap.remove(key); -+ } else { -+ levelMap.put(key, val); -+ } -+ } -+ } -+ -+ @Override -+ protected void processSchedulingUpdates(Long2ByteLinkedOpenHashMap updates, List scheduledTasks, List changedFullStatus) {} -+ }; -+ -+ for (;;) { -+ if (walkers.isEmpty() && tpBack.isEmpty()) { -+ for (int i = 0; i < PLAYERS; ++i) { -+ int rad = i < BIG_PLAYERS ? RAD_BIG : RAD; -+ int posX = random.nextInt(-rad, rad + 1); -+ int posZ = random.nextInt(-rad, rad + 1); -+ -+ io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.SingleUserAreaMap map = new io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.SingleUserAreaMap<>(null) { -+ @Override -+ protected void addCallback(Void parameter, int chunkX, int chunkZ) { -+ int src = 45 - 31 + 1; -+ ref.setSource(chunkX, chunkZ, src); -+ propagator.setSource(chunkX, chunkZ, src); -+ } -+ -+ @Override -+ protected void removeCallback(Void parameter, int chunkX, int chunkZ) { -+ ref.removeSource(chunkX, chunkZ); -+ propagator.removeSource(chunkX, chunkZ); -+ } -+ }; -+ -+ map.add(posX, posZ, VD); -+ -+ walkers.add(map); -+ } -+ for (int i = 0; i < TP_BACK_PLAYERS; ++i) { -+ int rad = RAD_BIG; -+ int posX = random.nextInt(-rad, rad + 1); -+ int posZ = random.nextInt(-rad, rad + 1); -+ -+ io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.SingleUserAreaMap map = new io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.SingleUserAreaMap<>(null) { -+ @Override -+ protected void addCallback(Void parameter, int chunkX, int chunkZ) { -+ int src = 45 - 31 + 1; -+ ref.setSource(chunkX, chunkZ, src); -+ propagator.setSource(chunkX, chunkZ, src); -+ } -+ -+ @Override -+ protected void removeCallback(Void parameter, int chunkX, int chunkZ) { -+ ref.removeSource(chunkX, chunkZ); -+ propagator.removeSource(chunkX, chunkZ); -+ } -+ }; -+ -+ map.add(posX, posZ, random.nextInt(1, 63)); -+ -+ tpBack.add(map); -+ } -+ } else { -+ for (int i = 0; i < PLAYERS; ++i) { -+ if (random.nextDouble() > WALK_CHANCE) { -+ continue; -+ } -+ -+ io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.SingleUserAreaMap map = walkers.get(i); -+ -+ int updateX = random.nextInt(-1, 2); -+ int updateZ = random.nextInt(-1, 2); -+ -+ map.update(map.lastChunkX + updateX, map.lastChunkZ + updateZ, VD); -+ } -+ -+ for (int i = 0; i < PLAYERS; ++i) { -+ if (random.nextDouble() > TP_CHANCE) { -+ continue; -+ } -+ -+ int rad = i < BIG_PLAYERS ? RAD_BIG : RAD; -+ int posX = random.nextInt(-rad, rad + 1); -+ int posZ = random.nextInt(-rad, rad + 1); -+ -+ io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.SingleUserAreaMap map = walkers.get(i); -+ -+ map.update(posX, posZ, VD); -+ } -+ -+ for (int i = 0; i < TP_BACK_PLAYERS; ++i) { -+ if (random.nextDouble() > TP_BACK_CHANCE) { -+ continue; -+ } -+ -+ io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.SingleUserAreaMap map = tpBack.get(i); -+ -+ map.update(-map.lastChunkX, -map.lastChunkZ, random.nextInt(1, 63)); -+ -+ if (random.nextDouble() > TP_STEAL_CHANCE) { -+ propagator.performUpdate( -+ map.lastChunkX >> SECTION_SHIFT, map.lastChunkZ >> SECTION_SHIFT, schedulingLock, null, null -+ ); -+ propagator.performUpdate( -+ (-map.lastChunkX >> SECTION_SHIFT), (-map.lastChunkZ >> SECTION_SHIFT), schedulingLock, null, null -+ ); -+ } -+ } -+ } -+ -+ ref.propagateUpdates(); -+ propagator.performUpdates(ticketLock, schedulingLock, null, null); -+ -+ if (!refMap.equals(levelMap)) { -+ throw new IllegalStateException("Error!"); -+ } -+ } -+ } -+ */ -+} -diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/queue/RadiusAwarePrioritisedExecutor.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/queue/RadiusAwarePrioritisedExecutor.java -new file mode 100644 -index 0000000000000000000000000000000000000000..f7b0e2564ac4bd2db1d2b2bdc230c9f52f8a21b7 ---- /dev/null -+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/queue/RadiusAwarePrioritisedExecutor.java -@@ -0,0 +1,667 @@ -+package io.papermc.paper.chunk.system.scheduling.queue; -+ -+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; -+import io.papermc.paper.util.CoordinateUtils; -+import it.unimi.dsi.fastutil.longs.Long2ReferenceOpenHashMap; -+import it.unimi.dsi.fastutil.objects.ReferenceOpenHashSet; -+import java.util.ArrayList; -+import java.util.Comparator; -+import java.util.List; -+import java.util.PriorityQueue; -+ -+public class RadiusAwarePrioritisedExecutor { -+ -+ private static final Comparator DEPENDENCY_NODE_COMPARATOR = (final DependencyNode t1, final DependencyNode t2) -> { -+ return Long.compare(t1.id, t2.id); -+ }; -+ -+ private final DependencyTree[] queues = new DependencyTree[PrioritisedExecutor.Priority.TOTAL_SCHEDULABLE_PRIORITIES]; -+ private static final int NO_TASKS_QUEUED = -1; -+ private int selectedQueue = NO_TASKS_QUEUED; -+ private boolean canQueueTasks = true; -+ -+ public RadiusAwarePrioritisedExecutor(final PrioritisedExecutor executor, final int maxToSchedule) { -+ for (int i = 0; i < this.queues.length; ++i) { -+ this.queues[i] = new DependencyTree(this, executor, maxToSchedule, i); -+ } -+ } -+ -+ private boolean canQueueTasks() { -+ return this.canQueueTasks; -+ } -+ -+ private List treeFinished() { -+ this.canQueueTasks = true; -+ for (int priority = 0; priority < this.queues.length; ++priority) { -+ final DependencyTree queue = this.queues[priority]; -+ if (queue.hasWaitingTasks()) { -+ final List ret = queue.tryPushTasks(); -+ -+ if (ret == null || ret.isEmpty()) { -+ // this happens when the tasks in the wait queue were purged -+ // in this case, the queue was actually empty, we just had to purge it -+ // if we set the selected queue without scheduling any tasks, the queue will never be unselected -+ // as that requires a scheduled task completing... -+ continue; -+ } -+ -+ this.selectedQueue = priority; -+ return ret; -+ } -+ } -+ -+ this.selectedQueue = NO_TASKS_QUEUED; -+ -+ return null; -+ } -+ -+ private List queue(final Task task, final PrioritisedExecutor.Priority priority) { -+ final int priorityId = priority.priority; -+ final DependencyTree queue = this.queues[priorityId]; -+ -+ final DependencyNode node = new DependencyNode(task, queue); -+ -+ if (task.dependencyNode != null) { -+ throw new IllegalStateException(); -+ } -+ task.dependencyNode = node; -+ -+ queue.pushNode(node); -+ -+ if (this.selectedQueue == NO_TASKS_QUEUED) { -+ this.canQueueTasks = true; -+ this.selectedQueue = priorityId; -+ return queue.tryPushTasks(); -+ } -+ -+ if (!this.canQueueTasks) { -+ return null; -+ } -+ -+ if (PrioritisedExecutor.Priority.isHigherPriority(priorityId, this.selectedQueue)) { -+ // prevent the lower priority tree from queueing more tasks -+ this.canQueueTasks = false; -+ return null; -+ } -+ -+ // priorityId != selectedQueue: lower priority, don't care - treeFinished will pick it up -+ return priorityId == this.selectedQueue ? queue.tryPushTasks() : null; -+ } -+ -+ public PrioritisedExecutor.PrioritisedTask createTask(final int chunkX, final int chunkZ, final int radius, -+ final Runnable run, final PrioritisedExecutor.Priority priority) { -+ if (radius < 0) { -+ throw new IllegalArgumentException("Radius must be > 0: " + radius); -+ } -+ return new Task(this, chunkX, chunkZ, radius, run, priority); -+ } -+ -+ public PrioritisedExecutor.PrioritisedTask createTask(final int chunkX, final int chunkZ, final int radius, -+ final Runnable run) { -+ return this.createTask(chunkX, chunkZ, radius, run, PrioritisedExecutor.Priority.NORMAL); -+ } -+ -+ public PrioritisedExecutor.PrioritisedTask queueTask(final int chunkX, final int chunkZ, final int radius, -+ final Runnable run, final PrioritisedExecutor.Priority priority) { -+ final PrioritisedExecutor.PrioritisedTask ret = this.createTask(chunkX, chunkZ, radius, run, priority); -+ -+ ret.queue(); -+ -+ return ret; -+ } -+ -+ public PrioritisedExecutor.PrioritisedTask queueTask(final int chunkX, final int chunkZ, final int radius, -+ final Runnable run) { -+ final PrioritisedExecutor.PrioritisedTask ret = this.createTask(chunkX, chunkZ, radius, run); -+ -+ ret.queue(); -+ -+ return ret; -+ } -+ -+ public PrioritisedExecutor.PrioritisedTask createInfiniteRadiusTask(final Runnable run, final PrioritisedExecutor.Priority priority) { -+ return new Task(this, 0, 0, -1, run, priority); -+ } -+ -+ public PrioritisedExecutor.PrioritisedTask createInfiniteRadiusTask(final Runnable run) { -+ return this.createInfiniteRadiusTask(run, PrioritisedExecutor.Priority.NORMAL); -+ } -+ -+ public PrioritisedExecutor.PrioritisedTask queueInfiniteRadiusTask(final Runnable run, final PrioritisedExecutor.Priority priority) { -+ final PrioritisedExecutor.PrioritisedTask ret = this.createInfiniteRadiusTask(run, priority); -+ -+ ret.queue(); -+ -+ return ret; -+ } -+ -+ public PrioritisedExecutor.PrioritisedTask queueInfiniteRadiusTask(final Runnable run) { -+ final PrioritisedExecutor.PrioritisedTask ret = this.createInfiniteRadiusTask(run, PrioritisedExecutor.Priority.NORMAL); -+ -+ ret.queue(); -+ -+ return ret; -+ } -+ -+ // all accesses must be synchronised by the radius aware object -+ private static final class DependencyTree { -+ -+ private final RadiusAwarePrioritisedExecutor scheduler; -+ private final PrioritisedExecutor executor; -+ private final int maxToSchedule; -+ private final int treeIndex; -+ -+ private int currentlyExecuting; -+ private long idGenerator; -+ -+ private final PriorityQueue awaiting = new PriorityQueue<>(DEPENDENCY_NODE_COMPARATOR); -+ -+ private final PriorityQueue infiniteRadius = new PriorityQueue<>(DEPENDENCY_NODE_COMPARATOR); -+ private boolean isInfiniteRadiusScheduled; -+ -+ private final Long2ReferenceOpenHashMap nodeByPosition = new Long2ReferenceOpenHashMap<>(); -+ -+ public DependencyTree(final RadiusAwarePrioritisedExecutor scheduler, final PrioritisedExecutor executor, -+ final int maxToSchedule, final int treeIndex) { -+ this.scheduler = scheduler; -+ this.executor = executor; -+ this.maxToSchedule = maxToSchedule; -+ this.treeIndex = treeIndex; -+ } -+ -+ public boolean hasWaitingTasks() { -+ return !this.awaiting.isEmpty() || !this.infiniteRadius.isEmpty(); -+ } -+ -+ private long nextId() { -+ return this.idGenerator++; -+ } -+ -+ private boolean isExecutingAnyTasks() { -+ return this.currentlyExecuting != 0; -+ } -+ -+ private void pushNode(final DependencyNode node) { -+ if (!node.task.isFiniteRadius()) { -+ this.infiniteRadius.add(node); -+ return; -+ } -+ -+ // set up dependency for node -+ final Task task = node.task; -+ -+ final int centerX = task.chunkX; -+ final int centerZ = task.chunkZ; -+ final int radius = task.radius; -+ -+ final int minX = centerX - radius; -+ final int maxX = centerX + radius; -+ -+ final int minZ = centerZ - radius; -+ final int maxZ = centerZ + radius; -+ -+ ReferenceOpenHashSet parents = null; -+ for (int currZ = minZ; currZ <= maxZ; ++currZ) { -+ for (int currX = minX; currX <= maxX; ++currX) { -+ final DependencyNode dependency = this.nodeByPosition.put(CoordinateUtils.getChunkKey(currX, currZ), node); -+ if (dependency != null) { -+ if (parents == null) { -+ parents = new ReferenceOpenHashSet<>(); -+ } -+ if (parents.add(dependency)) { -+ // added a dependency, so we need to add as a child to the dependency -+ if (dependency.children == null) { -+ dependency.children = new ArrayList<>(); -+ } -+ dependency.children.add(node); -+ } -+ } -+ } -+ } -+ -+ if (parents == null) { -+ // no dependencies, add straight to awaiting -+ this.awaiting.add(node); -+ } else { -+ node.parents = parents.size(); -+ // we will be added to awaiting once we have no parents -+ } -+ } -+ -+ // called only when a node is returned after being executed -+ private List returnNode(final DependencyNode node) { -+ final Task task = node.task; -+ -+ // now that the task is completed, we can push its children to the awaiting queue -+ this.pushChildren(node); -+ -+ if (task.isFiniteRadius()) { -+ // remove from dependency map -+ this.removeNodeFromMap(node); -+ } else { -+ // mark as no longer executing infinite radius -+ if (!this.isInfiniteRadiusScheduled) { -+ throw new IllegalStateException(); -+ } -+ this.isInfiniteRadiusScheduled = false; -+ } -+ -+ // decrement executing count, we are done executing this task -+ --this.currentlyExecuting; -+ -+ if (this.currentlyExecuting == 0) { -+ return this.scheduler.treeFinished(); -+ } -+ -+ return this.scheduler.canQueueTasks() ? this.tryPushTasks() : null; -+ } -+ -+ private List tryPushTasks() { -+ // tasks are not queued, but only created here - we do hold the lock for the map -+ List ret = null; -+ PrioritisedExecutor.PrioritisedTask pushedTask; -+ while ((pushedTask = this.tryPushTask()) != null) { -+ if (ret == null) { -+ ret = new ArrayList<>(); -+ } -+ ret.add(pushedTask); -+ } -+ -+ return ret; -+ } -+ -+ private void removeNodeFromMap(final DependencyNode node) { -+ final Task task = node.task; -+ -+ final int centerX = task.chunkX; -+ final int centerZ = task.chunkZ; -+ final int radius = task.radius; -+ -+ final int minX = centerX - radius; -+ final int maxX = centerX + radius; -+ -+ final int minZ = centerZ - radius; -+ final int maxZ = centerZ + radius; -+ -+ for (int currZ = minZ; currZ <= maxZ; ++currZ) { -+ for (int currX = minX; currX <= maxX; ++currX) { -+ this.nodeByPosition.remove(CoordinateUtils.getChunkKey(currX, currZ), node); -+ } -+ } -+ } -+ -+ private void pushChildren(final DependencyNode node) { -+ // add all the children that we can into awaiting -+ final List children = node.children; -+ if (children != null) { -+ for (int i = 0, len = children.size(); i < len; ++i) { -+ final DependencyNode child = children.get(i); -+ int newParents = --child.parents; -+ if (newParents == 0) { -+ // no more dependents, we can push to awaiting -+ // even if the child is purged, we need to push it so that its children will be pushed -+ this.awaiting.add(child); -+ } else if (newParents < 0) { -+ throw new IllegalStateException(); -+ } -+ } -+ } -+ } -+ -+ private DependencyNode pollAwaiting() { -+ final DependencyNode ret = this.awaiting.poll(); -+ if (ret == null) { -+ return ret; -+ } -+ -+ if (ret.parents != 0) { -+ throw new IllegalStateException(); -+ } -+ -+ if (ret.purged) { -+ // need to manually remove from state here -+ this.pushChildren(ret); -+ this.removeNodeFromMap(ret); -+ } // else: delay children push until the task has finished -+ -+ return ret; -+ } -+ -+ private DependencyNode pollInfinite() { -+ return this.infiniteRadius.poll(); -+ } -+ -+ public PrioritisedExecutor.PrioritisedTask tryPushTask() { -+ if (this.currentlyExecuting >= this.maxToSchedule || this.isInfiniteRadiusScheduled) { -+ return null; -+ } -+ -+ DependencyNode firstInfinite; -+ while ((firstInfinite = this.infiniteRadius.peek()) != null && firstInfinite.purged) { -+ this.pollInfinite(); -+ } -+ -+ DependencyNode firstAwaiting; -+ while ((firstAwaiting = this.awaiting.peek()) != null && firstAwaiting.purged) { -+ this.pollAwaiting(); -+ } -+ -+ if (firstInfinite == null && firstAwaiting == null) { -+ return null; -+ } -+ -+ // firstAwaiting compared to firstInfinite -+ final int compare; -+ -+ if (firstAwaiting == null) { -+ // we choose first infinite, or infinite < awaiting -+ compare = 1; -+ } else if (firstInfinite == null) { -+ // we choose first awaiting, or awaiting < infinite -+ compare = -1; -+ } else { -+ compare = DEPENDENCY_NODE_COMPARATOR.compare(firstAwaiting, firstInfinite); -+ } -+ -+ if (compare >= 0) { -+ if (this.currentlyExecuting != 0) { -+ // don't queue infinite task while other tasks are executing in parallel -+ return null; -+ } -+ ++this.currentlyExecuting; -+ this.pollInfinite(); -+ this.isInfiniteRadiusScheduled = true; -+ return firstInfinite.task.pushTask(this.executor); -+ } else { -+ ++this.currentlyExecuting; -+ this.pollAwaiting(); -+ return firstAwaiting.task.pushTask(this.executor); -+ } -+ } -+ } -+ -+ private static final class DependencyNode { -+ -+ private final Task task; -+ private final DependencyTree tree; -+ -+ // dependency tree fields -+ // (must hold lock on the scheduler to use) -+ // null is the same as empty, we just use it so that we don't allocate the set unless we need to -+ private List children; -+ // 0 indicates that this task is considered "awaiting" -+ private int parents; -+ // false -> scheduled and not cancelled -+ // true -> scheduled but cancelled -+ private boolean purged; -+ private final long id; -+ -+ public DependencyNode(final Task task, final DependencyTree tree) { -+ this.task = task; -+ this.id = tree.nextId(); -+ this.tree = tree; -+ } -+ } -+ -+ private static final class Task implements PrioritisedExecutor.PrioritisedTask, Runnable { -+ -+ // task specific fields -+ private final RadiusAwarePrioritisedExecutor scheduler; -+ private final int chunkX; -+ private final int chunkZ; -+ private final int radius; -+ private Runnable run; -+ private PrioritisedExecutor.Priority priority; -+ -+ private DependencyNode dependencyNode; -+ private PrioritisedExecutor.PrioritisedTask queuedTask; -+ -+ private Task(final RadiusAwarePrioritisedExecutor scheduler, final int chunkX, final int chunkZ, final int radius, -+ final Runnable run, final PrioritisedExecutor.Priority priority) { -+ this.scheduler = scheduler; -+ this.chunkX = chunkX; -+ this.chunkZ = chunkZ; -+ this.radius = radius; -+ this.run = run; -+ this.priority = priority; -+ } -+ -+ private boolean isFiniteRadius() { -+ return this.radius >= 0; -+ } -+ -+ private PrioritisedExecutor.PrioritisedTask pushTask(final PrioritisedExecutor executor) { -+ return this.queuedTask = executor.createTask(this, this.priority); -+ } -+ -+ private void executeTask() { -+ final Runnable run = this.run; -+ this.run = null; -+ run.run(); -+ } -+ -+ private static void scheduleTasks(final List toSchedule) { -+ if (toSchedule != null) { -+ for (int i = 0, len = toSchedule.size(); i < len; ++i) { -+ toSchedule.get(i).queue(); -+ } -+ } -+ } -+ -+ private void returnNode() { -+ final List toSchedule; -+ synchronized (this.scheduler) { -+ final DependencyNode node = this.dependencyNode; -+ this.dependencyNode = null; -+ toSchedule = node.tree.returnNode(node); -+ } -+ -+ scheduleTasks(toSchedule); -+ } -+ -+ @Override -+ public void run() { -+ final Runnable run = this.run; -+ this.run = null; -+ try { -+ run.run(); -+ } finally { -+ this.returnNode(); -+ } -+ } -+ -+ @Override -+ public boolean queue() { -+ final List toSchedule; -+ synchronized (this.scheduler) { -+ if (this.queuedTask != null || this.dependencyNode != null || this.priority == PrioritisedExecutor.Priority.COMPLETING) { -+ return false; -+ } -+ -+ toSchedule = this.scheduler.queue(this, this.priority); -+ } -+ -+ scheduleTasks(toSchedule); -+ return true; -+ } -+ -+ @Override -+ public boolean cancel() { -+ final PrioritisedExecutor.PrioritisedTask task; -+ synchronized (this.scheduler) { -+ if ((task = this.queuedTask) == null) { -+ if (this.priority == PrioritisedExecutor.Priority.COMPLETING) { -+ return false; -+ } -+ -+ this.priority = PrioritisedExecutor.Priority.COMPLETING; -+ if (this.dependencyNode != null) { -+ this.dependencyNode.purged = true; -+ this.dependencyNode = null; -+ } -+ -+ return true; -+ } -+ } -+ -+ if (task.cancel()) { -+ // must manually return the node -+ this.run = null; -+ this.returnNode(); -+ return true; -+ } -+ return false; -+ } -+ -+ @Override -+ public boolean execute() { -+ final PrioritisedExecutor.PrioritisedTask task; -+ synchronized (this.scheduler) { -+ if ((task = this.queuedTask) == null) { -+ if (this.priority == PrioritisedExecutor.Priority.COMPLETING) { -+ return false; -+ } -+ -+ this.priority = PrioritisedExecutor.Priority.COMPLETING; -+ if (this.dependencyNode != null) { -+ this.dependencyNode.purged = true; -+ this.dependencyNode = null; -+ } -+ // fall through to execution logic -+ } -+ } -+ -+ if (task != null) { -+ // will run the return node logic automatically -+ return task.execute(); -+ } else { -+ // don't run node removal/insertion logic, we aren't actually removed from the dependency tree -+ this.executeTask(); -+ return true; -+ } -+ } -+ -+ @Override -+ public PrioritisedExecutor.Priority getPriority() { -+ final PrioritisedExecutor.PrioritisedTask task; -+ synchronized (this.scheduler) { -+ if ((task = this.queuedTask) == null) { -+ return this.priority; -+ } -+ } -+ -+ return task.getPriority(); -+ } -+ -+ @Override -+ public boolean setPriority(final PrioritisedExecutor.Priority priority) { -+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { -+ throw new IllegalArgumentException("Invalid priority " + priority); -+ } -+ -+ final PrioritisedExecutor.PrioritisedTask task; -+ List toSchedule = null; -+ synchronized (this.scheduler) { -+ if ((task = this.queuedTask) == null) { -+ if (this.priority == PrioritisedExecutor.Priority.COMPLETING) { -+ return false; -+ } -+ -+ if (this.priority == priority) { -+ return true; -+ } -+ -+ this.priority = priority; -+ if (this.dependencyNode != null) { -+ // need to re-insert node -+ this.dependencyNode.purged = true; -+ this.dependencyNode = null; -+ toSchedule = this.scheduler.queue(this, priority); -+ } -+ } -+ } -+ -+ if (task != null) { -+ return task.setPriority(priority); -+ } -+ -+ scheduleTasks(toSchedule); -+ -+ return true; -+ } -+ -+ @Override -+ public boolean raisePriority(final PrioritisedExecutor.Priority priority) { -+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { -+ throw new IllegalArgumentException("Invalid priority " + priority); -+ } -+ -+ final PrioritisedExecutor.PrioritisedTask task; -+ List toSchedule = null; -+ synchronized (this.scheduler) { -+ if ((task = this.queuedTask) == null) { -+ if (this.priority == PrioritisedExecutor.Priority.COMPLETING) { -+ return false; -+ } -+ -+ if (this.priority.isHigherOrEqualPriority(priority)) { -+ return true; -+ } -+ -+ this.priority = priority; -+ if (this.dependencyNode != null) { -+ // need to re-insert node -+ this.dependencyNode.purged = true; -+ this.dependencyNode = null; -+ toSchedule = this.scheduler.queue(this, priority); -+ } -+ } -+ } -+ -+ if (task != null) { -+ return task.raisePriority(priority); -+ } -+ -+ scheduleTasks(toSchedule); -+ -+ return true; -+ } -+ -+ @Override -+ public boolean lowerPriority(final PrioritisedExecutor.Priority priority) { -+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { -+ throw new IllegalArgumentException("Invalid priority " + priority); -+ } -+ -+ final PrioritisedExecutor.PrioritisedTask task; -+ List toSchedule = null; -+ synchronized (this.scheduler) { -+ if ((task = this.queuedTask) == null) { -+ if (this.priority == PrioritisedExecutor.Priority.COMPLETING) { -+ return false; -+ } -+ -+ if (this.priority.isLowerOrEqualPriority(priority)) { -+ return true; -+ } -+ -+ this.priority = priority; -+ if (this.dependencyNode != null) { -+ // need to re-insert node -+ this.dependencyNode.purged = true; -+ this.dependencyNode = null; -+ toSchedule = this.scheduler.queue(this, priority); -+ } -+ } -+ } -+ -+ if (task != null) { -+ return task.lowerPriority(priority); -+ } -+ -+ scheduleTasks(toSchedule); -+ -+ return true; -+ } -+ } -+} -diff --git a/src/main/java/io/papermc/paper/command/PaperCommand.java b/src/main/java/io/papermc/paper/command/PaperCommand.java -index a3f43dccb796f30f6e9389e1ae182f06e9024e96..92bf78112c1cc75173e4e735bdeec9695fe10df6 100644 ---- a/src/main/java/io/papermc/paper/command/PaperCommand.java -+++ b/src/main/java/io/papermc/paper/command/PaperCommand.java -@@ -43,6 +43,7 @@ public final class PaperCommand extends Command { - commands.put(Set.of("mobcaps", "playermobcaps"), new MobcapsCommand()); - commands.put(Set.of("dumplisteners"), new DumpListenersCommand()); - commands.put(Set.of("fixlight"), new FixLightCommand()); -+ commands.put(Set.of("debug", "chunkinfo", "holderinfo"), new ChunkDebugCommand()); - - return commands.entrySet().stream() - .flatMap(entry -> entry.getKey().stream().map(s -> Map.entry(s, entry.getValue()))) -diff --git a/src/main/java/io/papermc/paper/command/subcommands/ChunkDebugCommand.java b/src/main/java/io/papermc/paper/command/subcommands/ChunkDebugCommand.java -new file mode 100644 -index 0000000000000000000000000000000000000000..61fa1ab0f6550fec2b9d035ea45c72627eb990d4 ---- /dev/null -+++ b/src/main/java/io/papermc/paper/command/subcommands/ChunkDebugCommand.java -@@ -0,0 +1,265 @@ -+package io.papermc.paper.command.subcommands; -+ -+import io.papermc.paper.command.CommandUtil; -+import io.papermc.paper.command.PaperSubcommand; -+import java.io.File; -+import java.time.LocalDateTime; -+import java.time.format.DateTimeFormatter; -+import java.util.ArrayList; -+import java.util.Collections; -+import java.util.List; -+import java.util.Locale; -+import io.papermc.paper.util.MCUtil; -+import net.minecraft.server.MinecraftServer; -+import net.minecraft.server.level.ChunkHolder; -+import net.minecraft.server.level.FullChunkStatus; -+import net.minecraft.server.level.ServerLevel; -+import net.minecraft.world.level.chunk.ChunkAccess; -+import net.minecraft.world.level.chunk.ImposterProtoChunk; -+import net.minecraft.world.level.chunk.LevelChunk; -+import net.minecraft.world.level.chunk.ProtoChunk; -+import org.bukkit.Bukkit; -+import org.bukkit.command.CommandSender; -+import org.bukkit.craftbukkit.CraftWorld; -+import org.checkerframework.checker.nullness.qual.NonNull; -+import org.checkerframework.checker.nullness.qual.Nullable; -+import org.checkerframework.framework.qual.DefaultQualifier; -+ -+import static net.kyori.adventure.text.Component.text; -+import static net.kyori.adventure.text.format.NamedTextColor.BLUE; -+import static net.kyori.adventure.text.format.NamedTextColor.DARK_AQUA; -+import static net.kyori.adventure.text.format.NamedTextColor.GREEN; -+import static net.kyori.adventure.text.format.NamedTextColor.RED; -+ -+@DefaultQualifier(NonNull.class) -+public final class ChunkDebugCommand implements PaperSubcommand { -+ @Override -+ public boolean execute(final CommandSender sender, final String subCommand, final String[] args) { -+ switch (subCommand) { -+ case "debug" -> this.doDebug(sender, args); -+ case "chunkinfo" -> this.doChunkInfo(sender, args); -+ case "holderinfo" -> this.doHolderInfo(sender, args); -+ } -+ return true; -+ } -+ -+ @Override -+ public List tabComplete(final CommandSender sender, final String subCommand, final String[] args) { -+ switch (subCommand) { -+ case "debug" -> { -+ if (args.length == 1) { -+ return CommandUtil.getListMatchingLast(sender, args, "help", "chunks"); -+ } -+ } -+ case "holderinfo" -> { -+ List worldNames = new ArrayList<>(); -+ worldNames.add("*"); -+ for (org.bukkit.World world : Bukkit.getWorlds()) { -+ worldNames.add(world.getName()); -+ } -+ if (args.length == 1) { -+ return CommandUtil.getListMatchingLast(sender, args, worldNames); -+ } -+ } -+ case "chunkinfo" -> { -+ List worldNames = new ArrayList<>(); -+ worldNames.add("*"); -+ for (org.bukkit.World world : Bukkit.getWorlds()) { -+ worldNames.add(world.getName()); -+ } -+ if (args.length == 1) { -+ return CommandUtil.getListMatchingLast(sender, args, worldNames); -+ } -+ } -+ } -+ return Collections.emptyList(); -+ } -+ -+ private void doChunkInfo(final CommandSender sender, final String[] args) { -+ List worlds; -+ if (args.length < 1 || args[0].equals("*")) { -+ worlds = Bukkit.getWorlds(); -+ } else { -+ worlds = new ArrayList<>(args.length); -+ for (final String arg : args) { -+ org.bukkit.@Nullable World world = Bukkit.getWorld(arg); -+ if (world == null) { -+ sender.sendMessage(text("World '" + arg + "' is invalid", RED)); -+ return; -+ } -+ worlds.add(world); -+ } -+ } -+ -+ int accumulatedTotal = 0; -+ int accumulatedInactive = 0; -+ int accumulatedBorder = 0; -+ int accumulatedTicking = 0; -+ int accumulatedEntityTicking = 0; -+ -+ for (final org.bukkit.World bukkitWorld : worlds) { -+ final ServerLevel world = ((CraftWorld) bukkitWorld).getHandle(); -+ -+ int total = 0; -+ int inactive = 0; -+ int full = 0; -+ int blockTicking = 0; -+ int entityTicking = 0; -+ -+ for (final ChunkHolder chunk : io.papermc.paper.chunk.system.ChunkSystem.getVisibleChunkHolders(world)) { -+ if (chunk.getFullChunkNowUnchecked() == null) { -+ continue; -+ } -+ -+ ++total; -+ -+ FullChunkStatus state = chunk.getFullStatus(); -+ -+ switch (state) { -+ case INACCESSIBLE -> ++inactive; -+ case FULL -> ++full; -+ case BLOCK_TICKING -> ++blockTicking; -+ case ENTITY_TICKING -> ++entityTicking; -+ } -+ } -+ -+ accumulatedTotal += total; -+ accumulatedInactive += inactive; -+ accumulatedBorder += full; -+ accumulatedTicking += blockTicking; -+ accumulatedEntityTicking += entityTicking; -+ -+ sender.sendMessage(text().append(text("Chunks in ", BLUE), text(bukkitWorld.getName(), GREEN), text(":"))); -+ sender.sendMessage(text().color(DARK_AQUA).append( -+ text("Total: ", BLUE), text(total), -+ text(" Inactive: ", BLUE), text(inactive), -+ text(" Full: ", BLUE), text(full), -+ text(" Block Ticking: ", BLUE), text(blockTicking), -+ text(" Entity Ticking: ", BLUE), text(entityTicking) -+ )); -+ } -+ if (worlds.size() > 1) { -+ sender.sendMessage(text().append(text("Chunks in ", BLUE), text("all listed worlds", GREEN), text(":", DARK_AQUA))); -+ sender.sendMessage(text().color(DARK_AQUA).append( -+ text("Total: ", BLUE), text(accumulatedTotal), -+ text(" Inactive: ", BLUE), text(accumulatedInactive), -+ text(" Full: ", BLUE), text(accumulatedBorder), -+ text(" Block Ticking: ", BLUE), text(accumulatedTicking), -+ text(" Entity Ticking: ", BLUE), text(accumulatedEntityTicking) -+ )); -+ } -+ } -+ -+ private void doHolderInfo(final CommandSender sender, final String[] args) { -+ List worlds; -+ if (args.length < 1 || args[0].equals("*")) { -+ worlds = Bukkit.getWorlds(); -+ } else { -+ worlds = new ArrayList<>(args.length); -+ for (final String arg : args) { -+ org.bukkit.@Nullable World world = Bukkit.getWorld(arg); -+ if (world == null) { -+ sender.sendMessage(text("World '" + arg + "' is invalid", RED)); -+ return; -+ } -+ worlds.add(world); -+ } -+ } -+ -+ int accumulatedTotal = 0; -+ int accumulatedCanUnload = 0; -+ int accumulatedNull = 0; -+ int accumulatedReadOnly = 0; -+ int accumulatedProtoChunk = 0; -+ int accumulatedFullChunk = 0; -+ -+ for (final org.bukkit.World bukkitWorld : worlds) { -+ final ServerLevel world = ((CraftWorld) bukkitWorld).getHandle(); -+ -+ int total = 0; -+ int canUnload = 0; -+ int nullChunks = 0; -+ int readOnly = 0; -+ int protoChunk = 0; -+ int fullChunk = 0; -+ -+ for (final ChunkHolder chunk : world.chunkTaskScheduler.chunkHolderManager.getOldChunkHolders()) { // Paper - change updating chunks map -+ final ChunkAccess lastChunk = chunk.getAvailableChunkNow(); -+ -+ ++total; -+ -+ if (lastChunk == null) { -+ ++nullChunks; -+ } else if (lastChunk instanceof ImposterProtoChunk) { -+ ++readOnly; -+ } else if (lastChunk instanceof ProtoChunk) { -+ ++protoChunk; -+ } else if (lastChunk instanceof LevelChunk) { -+ ++fullChunk; -+ } -+ -+ if (chunk.newChunkHolder.isSafeToUnload() == null) { -+ ++canUnload; -+ } -+ } -+ -+ accumulatedTotal += total; -+ accumulatedCanUnload += canUnload; -+ accumulatedNull += nullChunks; -+ accumulatedReadOnly += readOnly; -+ accumulatedProtoChunk += protoChunk; -+ accumulatedFullChunk += fullChunk; -+ -+ sender.sendMessage(text().append(text("Chunks in ", BLUE), text(bukkitWorld.getName(), GREEN), text(":"))); -+ sender.sendMessage(text().color(DARK_AQUA).append( -+ text("Total: ", BLUE), text(total), -+ text(" Unloadable: ", BLUE), text(canUnload), -+ text(" Null: ", BLUE), text(nullChunks), -+ text(" ReadOnly: ", BLUE), text(readOnly), -+ text(" Proto: ", BLUE), text(protoChunk), -+ text(" Full: ", BLUE), text(fullChunk) -+ )); -+ } -+ if (worlds.size() > 1) { -+ sender.sendMessage(text().append(text("Chunks in ", BLUE), text("all listed worlds", GREEN), text(":", DARK_AQUA))); -+ sender.sendMessage(text().color(DARK_AQUA).append( -+ text("Total: ", BLUE), text(accumulatedTotal), -+ text(" Unloadable: ", BLUE), text(accumulatedCanUnload), -+ text(" Null: ", BLUE), text(accumulatedNull), -+ text(" ReadOnly: ", BLUE), text(accumulatedReadOnly), -+ text(" Proto: ", BLUE), text(accumulatedProtoChunk), -+ text(" Full: ", BLUE), text(accumulatedFullChunk) -+ )); -+ } -+ } -+ -+ private void doDebug(final CommandSender sender, final String[] args) { -+ if (args.length < 1) { -+ sender.sendMessage(text("Use /paper debug [chunks] help for more information on a specific command", RED)); -+ return; -+ } -+ -+ final String debugType = args[0].toLowerCase(Locale.ROOT); -+ switch (debugType) { -+ case "chunks" -> { -+ if (args.length >= 2 && args[1].toLowerCase(Locale.ROOT).equals("help")) { -+ sender.sendMessage(text("Use /paper debug chunks [world] to dump loaded chunk information to a file", RED)); -+ break; -+ } -+ File file = new File(new File(new File("."), "debug"), -+ "chunks-" + DateTimeFormatter.ofPattern("yyyy-MM-dd_HH.mm.ss").format(LocalDateTime.now()) + ".txt"); -+ sender.sendMessage(text("Writing chunk information dump to " + file, GREEN)); -+ try { -+ MCUtil.dumpChunks(file, false); -+ sender.sendMessage(text("Successfully written chunk information!", GREEN)); -+ } catch (Throwable thr) { -+ MinecraftServer.LOGGER.warn("Failed to dump chunk information to file " + file.toString(), thr); -+ sender.sendMessage(text("Failed to dump chunk information, see console", RED)); -+ } -+ } -+ // "help" & default -+ default -> sender.sendMessage(text("Use /paper debug [chunks] help for more information on a specific command", RED)); -+ } -+ } -+ -+} -diff --git a/src/main/java/io/papermc/paper/configuration/GlobalConfiguration.java b/src/main/java/io/papermc/paper/configuration/GlobalConfiguration.java -index 4de88f74182bb596c6b5ad0351cc0dacefd0ce96..2874bc3001c4e7d9191e47ba512c5a68369c21f1 100644 ---- a/src/main/java/io/papermc/paper/configuration/GlobalConfiguration.java -+++ b/src/main/java/io/papermc/paper/configuration/GlobalConfiguration.java -@@ -29,6 +29,45 @@ public class GlobalConfiguration extends ConfigurationPart { - public static GlobalConfiguration get() { - return instance; - } -+ -+ public ChunkLoadingBasic chunkLoadingBasic; -+ -+ public class ChunkLoadingBasic extends ConfigurationPart { -+ @Comment("The maximum rate in chunks per second that the server will send to any individual player. Set to -1 to disable this limit.") -+ public double playerMaxChunkSendRate = 75.0; -+ -+ @Comment( -+ "The maximum rate at which chunks will load for any individual player. " + -+ "Note that this setting also affects chunk generations, since a chunk load is always first issued to test if a" + -+ "chunk is already generated. Set to -1 to disable this limit." -+ ) -+ public double playerMaxChunkLoadRate = 100.0; -+ -+ @Comment("The maximum rate at which chunks will generate for any individual player. Set to -1 to disable this limit.") -+ public double playerMaxChunkGenerateRate = -1.0; -+ } -+ -+ public ChunkLoadingAdvanced chunkLoadingAdvanced; -+ -+ public class ChunkLoadingAdvanced extends ConfigurationPart { -+ @Comment( -+ "Set to true if the server will match the chunk send radius that clients have configured" + -+ "in their view distance settings if the client is less-than the server's send distance." -+ ) -+ public boolean autoConfigSendDistance = true; -+ -+ @Comment( -+ "Specifies the maximum amount of concurrent chunk loads that an individual player can have." + -+ "Set to 0 to let the server configure it automatically per player, or set it to -1 to disable the limit." -+ ) -+ public int playerMaxConcurrentChunkLoads = 0; -+ -+ @Comment( -+ "Specifies the maximum amount of concurrent chunk generations that an individual player can have." + -+ "Set to 0 to let the server configure it automatically per player, or set it to -1 to disable the limit." -+ ) -+ public int playerMaxConcurrentChunkGenerates = 0; -+ } - static void set(GlobalConfiguration instance) { - GlobalConfiguration.instance = instance; - } -@@ -130,21 +169,6 @@ public class GlobalConfiguration extends ConfigurationPart { - public int incomingPacketThreshold = 300; - } - -- public ChunkLoading chunkLoading; -- -- public class ChunkLoading extends ConfigurationPart { -- public int minLoadRadius = 2; -- public int maxConcurrentSends = 2; -- public boolean autoconfigSendDistance = true; -- public double targetPlayerChunkSendRate = 100.0; -- public double globalMaxChunkSendRate = -1.0; -- public boolean enableFrustumPriority = false; -- public double globalMaxChunkLoadRate = -1.0; -- public double playerMaxConcurrentLoads = 20.0; -- public double globalMaxConcurrentLoads = 500.0; -- public double playerMaxChunkLoadRate = -1.0; -- } -- - public UnsupportedSettings unsupportedSettings; - - public class UnsupportedSettings extends ConfigurationPart { -@@ -201,7 +225,7 @@ public class GlobalConfiguration extends ConfigurationPart { - - @PostProcess - private void postProcess() { -- //io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.init(this); -+ io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.init(this); - } - } - -diff --git a/src/main/java/io/papermc/paper/threadedregions/TickRegions.java b/src/main/java/io/papermc/paper/threadedregions/TickRegions.java -new file mode 100644 -index 0000000000000000000000000000000000000000..d5d39e9c1f326e91010237b0db80d527ac52f4d6 ---- /dev/null -+++ b/src/main/java/io/papermc/paper/threadedregions/TickRegions.java -@@ -0,0 +1,9 @@ -+package io.papermc.paper.threadedregions; -+ -+// placeholder class for Folia -+public class TickRegions { -+ -+ public static int getRegionChunkShift() { -+ return 4; -+ } -+} -diff --git a/src/main/java/io/papermc/paper/util/IntervalledCounter.java b/src/main/java/io/papermc/paper/util/IntervalledCounter.java -index cea9c098ade00ee87b8efc8164ab72f5279758f0..197224e31175252d8438a8df585bbb65f2288d7f 100644 ---- a/src/main/java/io/papermc/paper/util/IntervalledCounter.java -+++ b/src/main/java/io/papermc/paper/util/IntervalledCounter.java -@@ -2,6 +2,8 @@ package io.papermc.paper.util; - - public final class IntervalledCounter { - -+ private static final int INITIAL_SIZE = 8; -+ - protected long[] times; - protected long[] counts; - protected final long interval; -@@ -11,8 +13,8 @@ public final class IntervalledCounter { - protected int tail; // exclusive - - public IntervalledCounter(final long interval) { -- this.times = new long[8]; -- this.counts = new long[8]; -+ this.times = new long[INITIAL_SIZE]; -+ this.counts = new long[INITIAL_SIZE]; - this.interval = interval; - } - -@@ -67,13 +69,13 @@ public final class IntervalledCounter { - this.tail = nextTail; - } - -- public void updateAndAdd(final int count) { -+ public void updateAndAdd(final long count) { - final long currTime = System.nanoTime(); - this.updateCurrentTime(currTime); - this.addTime(currTime, count); - } - -- public void updateAndAdd(final int count, final long currTime) { -+ public void updateAndAdd(final long count, final long currTime) { - this.updateCurrentTime(currTime); - this.addTime(currTime, count); - } -@@ -93,9 +95,13 @@ public final class IntervalledCounter { - this.tail = size; - - if (tail >= head) { -+ // sequentially ordered from [head, tail) - System.arraycopy(oldElements, head, newElements, 0, size); - System.arraycopy(oldCounts, head, newCounts, 0, size); - } else { -+ // ordered from [head, length) -+ // then followed by [0, tail) -+ - System.arraycopy(oldElements, head, newElements, 0, oldElements.length - head); - System.arraycopy(oldElements, 0, newElements, oldElements.length - head, tail); - -@@ -106,10 +112,18 @@ public final class IntervalledCounter { - - // returns in units per second - public double getRate() { -- return this.size() / (this.interval * 1.0e-9); -+ return (double)this.sum / ((double)this.interval * 1.0E-9); -+ } -+ -+ public long getInterval() { -+ return this.interval; - } - -- public long size() { -+ public long getSum() { - return this.sum; - } -+ -+ public int totalDataPoints() { -+ return this.tail >= this.head ? (this.tail - this.head) : (this.tail + (this.counts.length - this.head)); -+ } - } -diff --git a/src/main/java/io/papermc/paper/util/MCUtil.java b/src/main/java/io/papermc/paper/util/MCUtil.java -index c95a0af32178fe24448a5ae7a229c86ec883e8de..1d6b3fe2ce240af4ede61588795456b046eee6c9 100644 ---- a/src/main/java/io/papermc/paper/util/MCUtil.java -+++ b/src/main/java/io/papermc/paper/util/MCUtil.java -@@ -7,17 +7,30 @@ import com.google.common.util.concurrent.ThreadFactoryBuilder; - import io.papermc.paper.math.BlockPosition; - import io.papermc.paper.math.FinePosition; - import io.papermc.paper.math.Position; -+import com.google.gson.JsonArray; -+import com.google.gson.JsonObject; -+import com.google.gson.internal.Streams; -+import com.google.gson.stream.JsonWriter; -+import com.mojang.datafixers.util.Either; - import it.unimi.dsi.fastutil.objects.ObjectRBTreeSet; - import java.lang.ref.Cleaner; -+import it.unimi.dsi.fastutil.objects.ReferenceArrayList; - import net.minecraft.core.BlockPos; - import net.minecraft.core.Direction; - import net.minecraft.core.Vec3i; - import net.minecraft.server.MinecraftServer; -+import net.minecraft.server.level.ChunkHolder; -+import net.minecraft.server.level.ChunkMap; -+import net.minecraft.server.level.DistanceManager; - import net.minecraft.server.level.ServerLevel; -+import net.minecraft.server.level.ServerPlayer; -+import net.minecraft.server.level.Ticket; - import net.minecraft.world.entity.Entity; - import net.minecraft.world.level.ChunkPos; - import net.minecraft.world.level.ClipContext; - import net.minecraft.world.level.Level; -+import net.minecraft.world.level.chunk.ChunkAccess; -+import net.minecraft.world.level.chunk.status.ChunkStatus; - import net.minecraft.world.phys.Vec3; - import org.apache.commons.lang.exception.ExceptionUtils; - import com.mojang.authlib.GameProfile; -@@ -30,8 +43,11 @@ import org.spigotmc.AsyncCatcher; - - import javax.annotation.Nonnull; - import javax.annotation.Nullable; -+import java.io.*; -+import java.nio.charset.StandardCharsets; - import java.util.List; - import java.util.Queue; -+import java.util.Set; - import java.util.concurrent.CompletableFuture; - import java.util.concurrent.ExecutionException; - import java.util.concurrent.LinkedBlockingQueue; -@@ -532,6 +548,98 @@ public final class MCUtil { - } - } - -+ public static ChunkStatus getChunkStatus(ChunkHolder chunk) { -+ return chunk.getChunkHolderStatus(); -+ } -+ -+ public static void dumpChunks(File file, boolean watchdog) throws IOException { -+ file.getParentFile().mkdirs(); -+ file.createNewFile(); -+ ReferenceArrayList worlds = new ReferenceArrayList<>(org.bukkit.Bukkit.getWorlds()); -+ ReferenceArrayList loadedWorlds = new ReferenceArrayList<>(worlds); -+ JsonObject data = new JsonObject(); -+ -+ data.addProperty("server-version", org.bukkit.Bukkit.getVersion()); -+ data.addProperty("data-version", 1); -+ -+ { -+ JsonArray players = new JsonArray(); -+ data.add("all-players", players); -+ List playerList = MinecraftServer.getServer().getPlayerList().players; -+ for (ServerPlayer player : playerList) { -+ JsonObject playerData = new JsonObject(); -+ players.add(playerData); -+ -+ Level playerWorld = player.level(); -+ org.bukkit.World craftWorld = playerWorld.getWorld(); -+ Entity.RemovalReason removalReason = player.getRemovalReason(); -+ -+ playerData.addProperty("name", player.getScoreboardName()); -+ playerData.addProperty("x", player.getX()); -+ playerData.addProperty("y", player.getY()); -+ playerData.addProperty("z", player.getZ()); -+ playerData.addProperty("world", playerWorld == null ? "null world" : craftWorld.getName()); -+ playerData.addProperty("removalReason", removalReason == null ? "null" : removalReason.name()); -+ -+ if (!worlds.contains(craftWorld)) { -+ worlds.add(craftWorld); -+ } -+ } -+ } -+ -+ JsonArray chunkWaitInformation = new JsonArray(); -+ data.add("chunk-wait-infos", chunkWaitInformation); -+ -+ for (io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.ChunkInfo chunkInfo : io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.getChunkInfos()) { -+ chunkWaitInformation.add(chunkInfo.toString()); -+ } -+ -+ JsonArray worldsData = new JsonArray(); -+ -+ for (org.bukkit.World bukkitWorld : worlds) { -+ JsonObject worldData = new JsonObject(); -+ -+ ServerLevel world = ((org.bukkit.craftbukkit.CraftWorld)bukkitWorld).getHandle(); -+ List players = world.players(); -+ -+ worldData.addProperty("is-loaded", loadedWorlds.contains(bukkitWorld)); -+ worldData.addProperty("name", world.getWorld().getName()); -+ worldData.addProperty("view-distance", world.getWorld().getViewDistance()); // Paper - replace chunk loader system -+ worldData.addProperty("tick-view-distance", world.getWorld().getSimulationDistance()); // Paper - replace chunk loader system -+ -+ JsonArray playersData = new JsonArray(); -+ -+ for (ServerPlayer player : players) { -+ JsonObject playerData = new JsonObject(); -+ -+ playerData.addProperty("name", player.getScoreboardName()); -+ playerData.addProperty("x", player.getX()); -+ playerData.addProperty("y", player.getY()); -+ playerData.addProperty("z", player.getZ()); -+ -+ playersData.add(playerData); -+ } -+ -+ worldData.add("players", playersData); -+ worldData.add("chunk-data", watchdog ? world.chunkTaskScheduler.chunkHolderManager.getDebugJsonForWatchdog() : world.chunkTaskScheduler.chunkHolderManager.getDebugJson()); -+ worldsData.add(worldData); -+ } -+ -+ data.add("worlds", worldsData); -+ -+ StringWriter stringWriter = new StringWriter(); -+ JsonWriter jsonWriter = new JsonWriter(stringWriter); -+ jsonWriter.setIndent(" "); -+ jsonWriter.setLenient(false); -+ Streams.write(data, jsonWriter); -+ -+ String fileData = stringWriter.toString(); -+ -+ try (PrintStream out = new PrintStream(new FileOutputStream(file), false, StandardCharsets.UTF_8)) { -+ out.print(fileData); -+ } -+ } -+ - public static int getTicketLevelFor(net.minecraft.world.level.chunk.status.ChunkStatus status) { - return net.minecraft.server.level.ChunkMap.MAX_VIEW_DISTANCE + net.minecraft.world.level.chunk.status.ChunkStatus.getDistance(status); - } -diff --git a/src/main/java/io/papermc/paper/util/TickThread.java b/src/main/java/io/papermc/paper/util/TickThread.java -index 73e83d56a340f0c7dcb8ff737d621003e72c6de4..bdaf062f9b66ceab303a0807eca301342886a8ea 100644 ---- a/src/main/java/io/papermc/paper/util/TickThread.java -+++ b/src/main/java/io/papermc/paper/util/TickThread.java -@@ -1,12 +1,20 @@ - package io.papermc.paper.util; - -+import net.minecraft.core.BlockPos; - import net.minecraft.server.MinecraftServer; - import net.minecraft.server.level.ServerLevel; -+import net.minecraft.server.level.ServerPlayer; -+import net.minecraft.server.network.ServerGamePacketListenerImpl; -+import net.minecraft.util.Mth; - import net.minecraft.world.entity.Entity; -+import net.minecraft.world.level.ChunkPos; -+import net.minecraft.world.level.Level; -+import net.minecraft.world.phys.AABB; -+import net.minecraft.world.phys.Vec3; - import org.bukkit.Bukkit; - import java.util.concurrent.atomic.AtomicInteger; - --public final class TickThread extends Thread { -+public class TickThread extends Thread { - - public static final boolean STRICT_THREAD_CHECKS = Boolean.getBoolean("paper.strict-thread-checks"); - -@@ -16,6 +24,10 @@ public final class TickThread extends Thread { - } - } - -+ /** -+ * @deprecated -+ */ -+ @Deprecated - public static void softEnsureTickThread(final String reason) { - if (!STRICT_THREAD_CHECKS) { - return; -@@ -23,6 +35,10 @@ public final class TickThread extends Thread { - ensureTickThread(reason); - } - -+ /** -+ * @deprecated -+ */ -+ @Deprecated - public static void ensureTickThread(final String reason) { - if (!isTickThread()) { - MinecraftServer.LOGGER.error("Thread " + Thread.currentThread().getName() + " failed main thread check: " + reason, new Throwable()); -@@ -30,6 +46,20 @@ public final class TickThread extends Thread { - } - } - -+ public static void ensureTickThread(final ServerLevel world, final BlockPos pos, final String reason) { -+ if (!isTickThreadFor(world, pos)) { -+ MinecraftServer.LOGGER.error("Thread " + Thread.currentThread().getName() + " failed main thread check: " + reason, new Throwable()); -+ throw new IllegalStateException(reason); -+ } -+ } -+ -+ public static void ensureTickThread(final ServerLevel world, final ChunkPos pos, final String reason) { -+ if (!isTickThreadFor(world, pos)) { -+ MinecraftServer.LOGGER.error("Thread " + Thread.currentThread().getName() + " failed main thread check: " + reason, new Throwable()); -+ throw new IllegalStateException(reason); -+ } -+ } -+ - public static void ensureTickThread(final ServerLevel world, final int chunkX, final int chunkZ, final String reason) { - if (!isTickThreadFor(world, chunkX, chunkZ)) { - MinecraftServer.LOGGER.error("Thread " + Thread.currentThread().getName() + " failed main thread check: " + reason, new Throwable()); -@@ -44,6 +74,20 @@ public final class TickThread extends Thread { - } - } - -+ public static void ensureTickThread(final ServerLevel world, final AABB aabb, final String reason) { -+ if (!isTickThreadFor(world, aabb)) { -+ MinecraftServer.LOGGER.error("Thread " + Thread.currentThread().getName() + " failed main thread check: " + reason, new Throwable()); -+ throw new IllegalStateException(reason); -+ } -+ } -+ -+ public static void ensureTickThread(final ServerLevel world, final double blockX, final double blockZ, final String reason) { -+ if (!isTickThreadFor(world, blockX, blockZ)) { -+ MinecraftServer.LOGGER.error("Thread " + Thread.currentThread().getName() + " failed main thread check: " + reason, new Throwable()); -+ throw new IllegalStateException(reason); -+ } -+ } -+ - public final int id; /* We don't override getId as the spec requires that it be unique (with respect to all other threads) */ - - private static final AtomicInteger ID_GENERATOR = new AtomicInteger(); -@@ -66,13 +110,45 @@ public final class TickThread extends Thread { - } - - public static boolean isTickThread() { -- return Bukkit.isPrimaryThread(); -+ return Thread.currentThread() instanceof TickThread; -+ } -+ -+ public static boolean isShutdownThread() { -+ return false; -+ } -+ -+ public static boolean isTickThreadFor(final ServerLevel world, final BlockPos pos) { -+ return isTickThread(); -+ } -+ -+ public static boolean isTickThreadFor(final ServerLevel world, final ChunkPos pos) { -+ return isTickThread(); -+ } -+ -+ public static boolean isTickThreadFor(final ServerLevel world, final Vec3 pos) { -+ return isTickThread(); - } - - public static boolean isTickThreadFor(final ServerLevel world, final int chunkX, final int chunkZ) { - return isTickThread(); - } - -+ public static boolean isTickThreadFor(final ServerLevel world, final AABB aabb) { -+ return isTickThread(); -+ } -+ -+ public static boolean isTickThreadFor(final ServerLevel world, final double blockX, final double blockZ) { -+ return isTickThread(); -+ } -+ -+ public static boolean isTickThreadFor(final ServerLevel world, final Vec3 position, final Vec3 deltaMovement, final int buffer) { -+ return isTickThread(); -+ } -+ -+ public static boolean isTickThreadFor(final ServerLevel world, final int fromChunkX, final int fromChunkZ, final int toChunkX, final int toChunkZ) { -+ return isTickThread(); -+ } -+ - public static boolean isTickThreadFor(final ServerLevel world, final int chunkX, final int chunkZ, final int radius) { - return isTickThread(); - } -diff --git a/src/main/java/io/papermc/paper/world/ChunkEntitySlices.java b/src/main/java/io/papermc/paper/world/ChunkEntitySlices.java -new file mode 100644 -index 0000000000000000000000000000000000000000..c78cbec447032de9fe69748591bef6be300160ed ---- /dev/null -+++ b/src/main/java/io/papermc/paper/world/ChunkEntitySlices.java -@@ -0,0 +1,607 @@ -+package io.papermc.paper.world; -+ -+import com.destroystokyo.paper.util.maplist.EntityList; -+import io.papermc.paper.chunk.system.entity.EntityLookup; -+import io.papermc.paper.util.TickThread; -+import it.unimi.dsi.fastutil.objects.Reference2ObjectMap; -+import it.unimi.dsi.fastutil.objects.Reference2ObjectOpenHashMap; -+import net.minecraft.nbt.CompoundTag; -+import net.minecraft.server.level.ChunkHolder; -+import net.minecraft.server.level.FullChunkStatus; -+import net.minecraft.server.level.ServerLevel; -+import net.minecraft.util.Mth; -+import net.minecraft.world.entity.Entity; -+import net.minecraft.world.entity.EntityType; -+import net.minecraft.world.entity.boss.EnderDragonPart; -+import net.minecraft.world.entity.boss.enderdragon.EnderDragon; -+import net.minecraft.world.level.ChunkPos; -+import net.minecraft.world.level.chunk.storage.EntityStorage; -+import net.minecraft.world.level.entity.Visibility; -+import net.minecraft.world.phys.AABB; -+import org.bukkit.craftbukkit.event.CraftEventFactory; -+import java.util.ArrayList; -+import java.util.Arrays; -+import java.util.Iterator; -+import java.util.List; -+import java.util.function.Predicate; -+import org.bukkit.event.entity.EntityRemoveEvent; -+ -+public final class ChunkEntitySlices { -+ -+ protected final int minSection; -+ protected final int maxSection; -+ public final int chunkX; -+ public final int chunkZ; -+ protected final ServerLevel world; -+ -+ protected final EntityCollectionBySection allEntities; -+ protected final EntityCollectionBySection hardCollidingEntities; -+ protected final Reference2ObjectOpenHashMap, EntityCollectionBySection> entitiesByClass; -+ protected final EntityList entities = new EntityList(); -+ -+ public FullChunkStatus status; -+ -+ protected boolean isTransient; -+ -+ public boolean isTransient() { -+ return this.isTransient; -+ } -+ -+ public void setTransient(final boolean value) { -+ this.isTransient = value; -+ } -+ -+ // TODO implement container search optimisations -+ -+ public ChunkEntitySlices(final ServerLevel world, final int chunkX, final int chunkZ, final FullChunkStatus status, -+ final int minSection, final int maxSection) { // inclusive, inclusive -+ this.minSection = minSection; -+ this.maxSection = maxSection; -+ this.chunkX = chunkX; -+ this.chunkZ = chunkZ; -+ this.world = world; -+ -+ this.allEntities = new EntityCollectionBySection(this); -+ this.hardCollidingEntities = new EntityCollectionBySection(this); -+ this.entitiesByClass = new Reference2ObjectOpenHashMap<>(); -+ -+ this.status = status; -+ } -+ -+ // Paper start - optimise CraftChunk#getEntities -+ public org.bukkit.entity.Entity[] getChunkEntities() { -+ List ret = new java.util.ArrayList<>(); -+ final Entity[] entities = this.entities.getRawData(); -+ for (int i = 0, size = Math.min(entities.length, this.entities.size()); i < size; ++i) { -+ final Entity entity = entities[i]; -+ if (entity == null) { -+ continue; -+ } -+ final org.bukkit.entity.Entity bukkit = entity.getBukkitEntity(); -+ if (bukkit != null && bukkit.isValid()) { -+ ret.add(bukkit); -+ } -+ } -+ -+ return ret.toArray(new org.bukkit.entity.Entity[0]); -+ } -+ -+ public CompoundTag save() { -+ final int len = this.entities.size(); -+ if (len == 0) { -+ return null; -+ } -+ -+ final Entity[] rawData = this.entities.getRawData(); -+ final List collectedEntities = new ArrayList<>(len); -+ for (int i = 0; i < len; ++i) { -+ final Entity entity = rawData[i]; -+ if (entity.shouldBeSaved()) { -+ collectedEntities.add(entity); -+ } -+ } -+ -+ if (collectedEntities.isEmpty()) { -+ return null; -+ } -+ -+ return EntityStorage.saveEntityChunk(collectedEntities, new ChunkPos(this.chunkX, this.chunkZ), this.world); -+ } -+ -+ // returns true if this chunk has transient entities remaining -+ public boolean unload() { -+ final int len = this.entities.size(); -+ final Entity[] collectedEntities = Arrays.copyOf(this.entities.getRawData(), len); -+ -+ for (int i = 0; i < len; ++i) { -+ final Entity entity = collectedEntities[i]; -+ if (entity.isRemoved()) { -+ // removed by us below -+ continue; -+ } -+ if (entity.shouldBeSaved()) { -+ entity.setRemoved(Entity.RemovalReason.UNLOADED_TO_CHUNK, EntityRemoveEvent.Cause.UNLOAD); -+ if (entity.isVehicle()) { -+ // we cannot assume that these entities are contained within this chunk, because entities can -+ // desync - so we need to remove them all -+ for (final Entity passenger : entity.getIndirectPassengers()) { -+ passenger.setRemoved(Entity.RemovalReason.UNLOADED_TO_CHUNK, EntityRemoveEvent.Cause.UNLOAD); -+ } -+ } -+ } -+ } -+ -+ return this.entities.size() != 0; -+ } -+ -+ private List getAllEntities() { -+ final int len = this.entities.size(); -+ if (len == 0) { -+ return new ArrayList<>(); -+ } -+ -+ final Entity[] rawData = this.entities.getRawData(); -+ final List collectedEntities = new ArrayList<>(len); -+ for (int i = 0; i < len; ++i) { -+ collectedEntities.add(rawData[i]); -+ } -+ -+ return collectedEntities; -+ } -+ -+ public void callEntitiesLoadEvent() { -+ CraftEventFactory.callEntitiesLoadEvent(this.world, new ChunkPos(this.chunkX, this.chunkZ), this.getAllEntities()); -+ } -+ -+ public void callEntitiesUnloadEvent() { -+ CraftEventFactory.callEntitiesUnloadEvent(this.world, new ChunkPos(this.chunkX, this.chunkZ), this.getAllEntities()); -+ } -+ // Paper end - optimise CraftChunk#getEntities -+ -+ public boolean isEmpty() { -+ return this.entities.size() == 0; -+ } -+ -+ public void mergeInto(final ChunkEntitySlices slices) { -+ final Entity[] entities = this.entities.getRawData(); -+ for (int i = 0, size = Math.min(entities.length, this.entities.size()); i < size; ++i) { -+ final Entity entity = entities[i]; -+ slices.addEntity(entity, entity.sectionY); -+ } -+ } -+ -+ private boolean preventStatusUpdates; -+ public boolean startPreventingStatusUpdates() { -+ final boolean ret = this.preventStatusUpdates; -+ this.preventStatusUpdates = true; -+ return ret; -+ } -+ -+ public boolean isPreventingStatusUpdates() { -+ return this.preventStatusUpdates; -+ } -+ -+ public void stopPreventingStatusUpdates(final boolean prev) { -+ this.preventStatusUpdates = prev; -+ } -+ -+ public void updateStatus(final FullChunkStatus status, final EntityLookup lookup) { -+ this.status = status; -+ -+ final Entity[] entities = this.entities.getRawData(); -+ -+ for (int i = 0, size = this.entities.size(); i < size; ++i) { -+ final Entity entity = entities[i]; -+ -+ final Visibility oldVisibility = EntityLookup.getEntityStatus(entity); -+ entity.chunkStatus = status; -+ final Visibility newVisibility = EntityLookup.getEntityStatus(entity); -+ -+ lookup.entityStatusChange(entity, this, oldVisibility, newVisibility, false, false, false); -+ } -+ } -+ -+ public boolean addEntity(final Entity entity, final int chunkSection) { -+ if (!this.entities.add(entity)) { -+ return false; -+ } -+ entity.chunkStatus = this.status; -+ final int sectionIndex = chunkSection - this.minSection; -+ -+ this.allEntities.addEntity(entity, sectionIndex); -+ -+ if (entity.hardCollides()) { -+ this.hardCollidingEntities.addEntity(entity, sectionIndex); -+ } -+ -+ for (final Iterator, EntityCollectionBySection>> iterator = -+ this.entitiesByClass.reference2ObjectEntrySet().fastIterator(); iterator.hasNext();) { -+ final Reference2ObjectMap.Entry, EntityCollectionBySection> entry = iterator.next(); -+ -+ if (entry.getKey().isInstance(entity)) { -+ entry.getValue().addEntity(entity, sectionIndex); -+ } -+ } -+ -+ return true; -+ } -+ -+ public boolean removeEntity(final Entity entity, final int chunkSection) { -+ if (!this.entities.remove(entity)) { -+ return false; -+ } -+ entity.chunkStatus = null; -+ final int sectionIndex = chunkSection - this.minSection; -+ -+ this.allEntities.removeEntity(entity, sectionIndex); -+ -+ if (entity.hardCollides()) { -+ this.hardCollidingEntities.removeEntity(entity, sectionIndex); -+ } -+ -+ for (final Iterator, EntityCollectionBySection>> iterator = -+ this.entitiesByClass.reference2ObjectEntrySet().fastIterator(); iterator.hasNext();) { -+ final Reference2ObjectMap.Entry, EntityCollectionBySection> entry = iterator.next(); -+ -+ if (entry.getKey().isInstance(entity)) { -+ entry.getValue().removeEntity(entity, sectionIndex); -+ } -+ } -+ -+ return true; -+ } -+ -+ public void getHardCollidingEntities(final Entity except, final AABB box, final List into, final Predicate predicate) { -+ this.hardCollidingEntities.getEntities(except, box, into, predicate); -+ } -+ -+ public void getEntities(final Entity except, final AABB box, final List into, final Predicate predicate) { -+ this.allEntities.getEntitiesWithEnderDragonParts(except, box, into, predicate); -+ } -+ -+ public void getEntitiesWithoutDragonParts(final Entity except, final AABB box, final List into, final Predicate predicate) { -+ this.allEntities.getEntities(except, box, into, predicate); -+ } -+ -+ public void getEntities(final EntityType type, final AABB box, final List into, -+ final Predicate predicate) { -+ this.allEntities.getEntities(type, box, (List)into, (Predicate)predicate); -+ } -+ -+ protected EntityCollectionBySection initClass(final Class clazz) { -+ final EntityCollectionBySection ret = new EntityCollectionBySection(this); -+ -+ for (int sectionIndex = 0; sectionIndex < this.allEntities.entitiesBySection.length; ++sectionIndex) { -+ final BasicEntityList sectionEntities = this.allEntities.entitiesBySection[sectionIndex]; -+ if (sectionEntities == null) { -+ continue; -+ } -+ -+ final Entity[] storage = sectionEntities.storage; -+ -+ for (int i = 0, len = Math.min(storage.length, sectionEntities.size()); i < len; ++i) { -+ final Entity entity = storage[i]; -+ -+ if (clazz.isInstance(entity)) { -+ ret.addEntity(entity, sectionIndex); -+ } -+ } -+ } -+ -+ return ret; -+ } -+ -+ public void getEntities(final Class clazz, final Entity except, final AABB box, final List into, -+ final Predicate predicate) { -+ EntityCollectionBySection collection = this.entitiesByClass.get(clazz); -+ if (collection != null) { -+ collection.getEntitiesWithEnderDragonParts(except, clazz, box, (List)into, (Predicate)predicate); -+ } else { -+ this.entitiesByClass.putIfAbsent(clazz, collection = this.initClass(clazz)); -+ collection.getEntitiesWithEnderDragonParts(except, clazz, box, (List)into, (Predicate)predicate); -+ } -+ } -+ -+ protected static final class BasicEntityList { -+ -+ protected static final Entity[] EMPTY = new Entity[0]; -+ protected static final int DEFAULT_CAPACITY = 4; -+ -+ protected E[] storage; -+ protected int size; -+ -+ public BasicEntityList() { -+ this(0); -+ } -+ -+ public BasicEntityList(final int cap) { -+ this.storage = (E[])(cap <= 0 ? EMPTY : new Entity[cap]); -+ } -+ -+ public boolean isEmpty() { -+ return this.size == 0; -+ } -+ -+ public int size() { -+ return this.size; -+ } -+ -+ private void resize() { -+ if (this.storage == EMPTY) { -+ this.storage = (E[])new Entity[DEFAULT_CAPACITY]; -+ } else { -+ this.storage = Arrays.copyOf(this.storage, this.storage.length * 2); -+ } -+ } -+ -+ public void add(final E entity) { -+ final int idx = this.size++; -+ if (idx >= this.storage.length) { -+ this.resize(); -+ this.storage[idx] = entity; -+ } else { -+ this.storage[idx] = entity; -+ } -+ } -+ -+ public int indexOf(final E entity) { -+ final E[] storage = this.storage; -+ -+ for (int i = 0, len = Math.min(this.storage.length, this.size); i < len; ++i) { -+ if (storage[i] == entity) { -+ return i; -+ } -+ } -+ -+ return -1; -+ } -+ -+ public boolean remove(final E entity) { -+ final int idx = this.indexOf(entity); -+ if (idx == -1) { -+ return false; -+ } -+ -+ final int size = --this.size; -+ final E[] storage = this.storage; -+ if (idx != size) { -+ System.arraycopy(storage, idx + 1, storage, idx, size - idx); -+ } -+ -+ storage[size] = null; -+ -+ return true; -+ } -+ -+ public boolean has(final E entity) { -+ return this.indexOf(entity) != -1; -+ } -+ } -+ -+ protected static final class EntityCollectionBySection { -+ -+ protected final ChunkEntitySlices manager; -+ protected final long[] nonEmptyBitset; -+ protected final BasicEntityList[] entitiesBySection; -+ protected int count; -+ -+ public EntityCollectionBySection(final ChunkEntitySlices manager) { -+ this.manager = manager; -+ -+ final int sectionCount = manager.maxSection - manager.minSection + 1; -+ -+ this.nonEmptyBitset = new long[(sectionCount + (Long.SIZE - 1)) >>> 6]; // (sectionCount + (Long.SIZE - 1)) / Long.SIZE -+ this.entitiesBySection = new BasicEntityList[sectionCount]; -+ } -+ -+ public void addEntity(final Entity entity, final int sectionIndex) { -+ BasicEntityList list = this.entitiesBySection[sectionIndex]; -+ -+ if (list != null && list.has(entity)) { -+ return; -+ } -+ -+ if (list == null) { -+ this.entitiesBySection[sectionIndex] = list = new BasicEntityList<>(); -+ this.nonEmptyBitset[sectionIndex >>> 6] |= (1L << (sectionIndex & (Long.SIZE - 1))); -+ } -+ -+ list.add(entity); -+ ++this.count; -+ } -+ -+ public void removeEntity(final Entity entity, final int sectionIndex) { -+ final BasicEntityList list = this.entitiesBySection[sectionIndex]; -+ -+ if (list == null || !list.remove(entity)) { -+ return; -+ } -+ -+ --this.count; -+ -+ if (list.isEmpty()) { -+ this.entitiesBySection[sectionIndex] = null; -+ this.nonEmptyBitset[sectionIndex >>> 6] ^= (1L << (sectionIndex & (Long.SIZE - 1))); -+ } -+ } -+ -+ public void getEntities(final Entity except, final AABB box, final List into, final Predicate predicate) { -+ if (this.count == 0) { -+ return; -+ } -+ -+ final int minSection = this.manager.minSection; -+ final int maxSection = this.manager.maxSection; -+ -+ final int min = Mth.clamp(Mth.floor(box.minY - 2.0) >> 4, minSection, maxSection); -+ final int max = Mth.clamp(Mth.floor(box.maxY + 2.0) >> 4, minSection, maxSection); -+ -+ final BasicEntityList[] entitiesBySection = this.entitiesBySection; -+ -+ for (int section = min; section <= max; ++section) { -+ final BasicEntityList list = entitiesBySection[section - minSection]; -+ -+ if (list == null) { -+ continue; -+ } -+ -+ final Entity[] storage = list.storage; -+ -+ for (int i = 0, len = Math.min(storage.length, list.size()); i < len; ++i) { -+ final Entity entity = storage[i]; -+ -+ if (entity == null || entity == except || !entity.getBoundingBox().intersects(box)) { -+ continue; -+ } -+ -+ if (predicate != null && !predicate.test(entity)) { -+ continue; -+ } -+ -+ into.add(entity); -+ } -+ } -+ } -+ -+ public void getEntitiesWithEnderDragonParts(final Entity except, final AABB box, final List into, -+ final Predicate predicate) { -+ if (this.count == 0) { -+ return; -+ } -+ -+ final int minSection = this.manager.minSection; -+ final int maxSection = this.manager.maxSection; -+ -+ final int min = Mth.clamp(Mth.floor(box.minY - 2.0) >> 4, minSection, maxSection); -+ final int max = Mth.clamp(Mth.floor(box.maxY + 2.0) >> 4, minSection, maxSection); -+ -+ final BasicEntityList[] entitiesBySection = this.entitiesBySection; -+ -+ for (int section = min; section <= max; ++section) { -+ final BasicEntityList list = entitiesBySection[section - minSection]; -+ -+ if (list == null) { -+ continue; -+ } -+ -+ final Entity[] storage = list.storage; -+ -+ for (int i = 0, len = Math.min(storage.length, list.size()); i < len; ++i) { -+ final Entity entity = storage[i]; -+ -+ if (entity == null || entity == except || !entity.getBoundingBox().intersects(box)) { -+ continue; -+ } -+ -+ if (predicate == null || predicate.test(entity)) { -+ into.add(entity); -+ } // else: continue to test the ender dragon parts -+ -+ if (entity instanceof EnderDragon) { -+ for (final EnderDragonPart part : ((EnderDragon)entity).subEntities) { -+ if (part == except || !part.getBoundingBox().intersects(box)) { -+ continue; -+ } -+ -+ if (predicate != null && !predicate.test(part)) { -+ continue; -+ } -+ -+ into.add(part); -+ } -+ } -+ } -+ } -+ } -+ -+ public void getEntitiesWithEnderDragonParts(final Entity except, final Class clazz, final AABB box, final List into, -+ final Predicate predicate) { -+ if (this.count == 0) { -+ return; -+ } -+ -+ final int minSection = this.manager.minSection; -+ final int maxSection = this.manager.maxSection; -+ -+ final int min = Mth.clamp(Mth.floor(box.minY - 2.0) >> 4, minSection, maxSection); -+ final int max = Mth.clamp(Mth.floor(box.maxY + 2.0) >> 4, minSection, maxSection); -+ -+ final BasicEntityList[] entitiesBySection = this.entitiesBySection; -+ -+ for (int section = min; section <= max; ++section) { -+ final BasicEntityList list = entitiesBySection[section - minSection]; -+ -+ if (list == null) { -+ continue; -+ } -+ -+ final Entity[] storage = list.storage; -+ -+ for (int i = 0, len = Math.min(storage.length, list.size()); i < len; ++i) { -+ final Entity entity = storage[i]; -+ -+ if (entity == null || entity == except || !entity.getBoundingBox().intersects(box)) { -+ continue; -+ } -+ -+ if (predicate == null || predicate.test(entity)) { -+ into.add(entity); -+ } // else: continue to test the ender dragon parts -+ -+ if (entity instanceof EnderDragon) { -+ for (final EnderDragonPart part : ((EnderDragon)entity).subEntities) { -+ if (part == except || !part.getBoundingBox().intersects(box) || !clazz.isInstance(part)) { -+ continue; -+ } -+ -+ if (predicate != null && !predicate.test(part)) { -+ continue; -+ } -+ -+ into.add(part); -+ } -+ } -+ } -+ } -+ } -+ -+ public void getEntities(final EntityType type, final AABB box, final List into, -+ final Predicate predicate) { -+ if (this.count == 0) { -+ return; -+ } -+ -+ final int minSection = this.manager.minSection; -+ final int maxSection = this.manager.maxSection; -+ -+ final int min = Mth.clamp(Mth.floor(box.minY - 2.0) >> 4, minSection, maxSection); -+ final int max = Mth.clamp(Mth.floor(box.maxY + 2.0) >> 4, minSection, maxSection); -+ -+ final BasicEntityList[] entitiesBySection = this.entitiesBySection; -+ -+ for (int section = min; section <= max; ++section) { -+ final BasicEntityList list = entitiesBySection[section - minSection]; -+ -+ if (list == null) { -+ continue; -+ } -+ -+ final Entity[] storage = list.storage; -+ -+ for (int i = 0, len = Math.min(storage.length, list.size()); i < len; ++i) { -+ final Entity entity = storage[i]; -+ -+ if (entity == null || (type != null && entity.getType() != type) || !entity.getBoundingBox().intersects(box)) { -+ continue; -+ } -+ -+ if (predicate != null && !predicate.test((T)entity)) { -+ continue; -+ } -+ -+ into.add((T)entity); -+ } -+ } -+ } -+ } -+} -diff --git a/src/main/java/net/minecraft/server/Main.java b/src/main/java/net/minecraft/server/Main.java -index c33f85b570f159ab465b5a10a8044a81f2797f43..244a19ecd0234fa1d7a6ecfea20751595688605d 100644 ---- a/src/main/java/net/minecraft/server/Main.java -+++ b/src/main/java/net/minecraft/server/Main.java -@@ -320,6 +320,7 @@ public class Main { - - convertable_conversionsession.saveDataTag(iregistrycustom_dimension, savedata); - */ -+ Class.forName(net.minecraft.world.entity.npc.VillagerTrades.class.getName()); // Paper - load this sync so it won't fail later async - final DedicatedServer dedicatedserver = (DedicatedServer) MinecraftServer.spin((thread) -> { - DedicatedServer dedicatedserver1 = new DedicatedServer(optionset, worldLoader.get(), thread, convertable_conversionsession, resourcepackrepository, worldstem, dedicatedserversettings, DataFixers.getDataFixer(), services, LoggerChunkProgressListener::createFromGameruleRadius); - -diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java -index 1a9e323659dcff12ce53919eb3d6d6f66f835292..2e4f20ba5f6f61b797f1eef267302fa3314f94a5 100644 ---- a/src/main/java/net/minecraft/server/MinecraftServer.java -+++ b/src/main/java/net/minecraft/server/MinecraftServer.java -@@ -315,7 +315,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop S spin(Function serverFactory) { - AtomicReference atomicreference = new AtomicReference(); -- Thread thread = new Thread(() -> { -+ Thread thread = new io.papermc.paper.util.TickThread(() -> { // Paper - rewrite chunk system - ((MinecraftServer) atomicreference.get()).runServer(); - }, "Server thread"); - -@@ -651,7 +651,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop { -- return worldserver1.getChunkSource().chunkMap.hasWork(); -- })) { -- this.nextTickTimeNanos = Util.getNanos() + TimeUtil.NANOSECONDS_PER_MILLISECOND; -- iterator = this.getAllLevels().iterator(); -- -- while (iterator.hasNext()) { -- worldserver = (ServerLevel) iterator.next(); -- worldserver.getChunkSource().removeTicketsOnClosing(); -- worldserver.getChunkSource().tick(() -> { -- return true; -- }, false); -- } -- -- this.waitUntilNextTick(); -- } -- -- this.saveAllChunks(false, true, false); -- iterator = this.getAllLevels().iterator(); -- -- while (iterator.hasNext()) { -- worldserver = (ServerLevel) iterator.next(); -- if (worldserver != null) { -- try { -- worldserver.close(); -- } catch (IOException ioexception) { -- MinecraftServer.LOGGER.error("Exception closing the level", ioexception); -- } -- } -- } -+ this.saveAllChunks(false, true, false, true); // Paper - rewrite chunk system - move closing into here - - this.isSaving = false; - this.resources.close(); -@@ -1020,6 +1001,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop { -- for (final Entity entity : level.getEntities().getAll()) { -+ for (final Entity entity : level.getEntityLookup().getAllCopy()) { // Paper - rewrite chunk system - if (entity.isRemoved()) { - continue; - } -@@ -2622,6 +2617,13 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop { -+ LOGGER.info("Async debug chunks executing"); -+ io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.dumpAllChunkLoadInfo(false); -+ CommandSender sender = MinecraftServer.getServer().console; -+ java.io.File file = new java.io.File(new java.io.File(new java.io.File("."), "debug"), -+ "chunks-" + java.time.format.DateTimeFormatter.ofPattern("yyyy-MM-dd_HH.mm.ss").format(java.time.LocalDateTime.now()) + ".txt"); -+ sender.sendMessage(net.kyori.adventure.text.Component.text("Writing chunk information dump to " + file, net.kyori.adventure.text.format.NamedTextColor.GREEN)); -+ try { -+ io.papermc.paper.util.MCUtil.dumpChunks(file, true); -+ sender.sendMessage(net.kyori.adventure.text.Component.text("Successfully written chunk information!", net.kyori.adventure.text.format.NamedTextColor.GREEN)); -+ } catch (Throwable thr) { -+ MinecraftServer.LOGGER.warn("Failed to dump chunk information to file " + file.toString(), thr); -+ sender.sendMessage(net.kyori.adventure.text.Component.text("Failed to dump chunk information, see console", net.kyori.adventure.text.format.NamedTextColor.RED)); -+ } -+ }; -+ Thread t = new Thread(run); -+ t.setName("Async debug thread #" + ASYNC_DEBUG_CHUNKS_COUNT.getAndIncrement()); -+ t.setDaemon(true); -+ t.start(); -+ return; -+ } -+ // Paper end - rewrite chunk system - this.serverCommandQueue.add(new ConsoleInput(command, commandSource)); // Paper - Perf: use proper queue - } - -diff --git a/src/main/java/net/minecraft/server/level/ChunkHolder.java b/src/main/java/net/minecraft/server/level/ChunkHolder.java -index 88729d92878f98729eb5669cce5ae5b1418865a1..13d15a135dd0373bef4a5ac9ffb56dbbf53353a0 100644 ---- a/src/main/java/net/minecraft/server/level/ChunkHolder.java -+++ b/src/main/java/net/minecraft/server/level/ChunkHolder.java -@@ -46,17 +46,12 @@ public class ChunkHolder { - public static final ChunkResult NOT_DONE_YET = ChunkResult.error("Not done yet"); - private static final CompletableFuture> UNLOADED_LEVEL_CHUNK_FUTURE = CompletableFuture.completedFuture(ChunkHolder.UNLOADED_LEVEL_CHUNK); - private static final List CHUNK_STATUSES = ChunkStatus.getStatusList(); -- private final AtomicReferenceArray>> futures; -+ // Paper - rewrite chunk system - private final LevelHeightAccessor levelHeightAccessor; -- private volatile CompletableFuture> fullChunkFuture; private int fullChunkCreateCount; private volatile boolean isFullChunkReady; // Paper - cache chunk ticking stage -- private volatile CompletableFuture> tickingChunkFuture; private volatile boolean isTickingReady; // Paper - cache chunk ticking stage -- private volatile CompletableFuture> entityTickingChunkFuture; private volatile boolean isEntityTickingReady; // Paper - cache chunk ticking stage -- public CompletableFuture chunkToSave; // Paper - public -+ // Paper - rewrite chunk system - @Nullable - private final DebugBuffer chunkToSaveHistory; -- public int oldTicketLevel; -- private int ticketLevel; -- private int queueLevel; -+ // Paper - rewrite chunk system - public final ChunkPos pos; - private boolean hasChangedSections; - private final ShortSet[] changedBlocksPerSection; -@@ -65,11 +60,20 @@ public class ChunkHolder { - private final LevelLightEngine lightEngine; - private final ChunkHolder.LevelChangeListener onLevelChange; - public final ChunkHolder.PlayerProvider playerProvider; -- private boolean wasAccessibleSinceLastSave; -- private CompletableFuture pendingFullStateConfirmation; -- private CompletableFuture sendSync; -+ // Paper - rewrite chunk system - - private final ChunkMap chunkMap; // Paper -+ // Paper start - no-tick view distance -+ public final LevelChunk getSendingChunk() { -+ // it's important that we use getChunkAtIfLoadedImmediately to mirror the chunk sending logic used -+ // in Chunk's neighbour callback -+ LevelChunk ret = this.chunkMap.level.getChunkSource().getChunkAtIfLoadedImmediately(this.pos.x, this.pos.z); -+ if (ret != null && ret.areNeighboursLoaded(1)) { -+ return ret; -+ } -+ return null; -+ } -+ // Paper end - no-tick view distance - - // Paper start - public void onChunkAdd() { -@@ -81,147 +85,131 @@ public class ChunkHolder { - } - // Paper end - -- public ChunkHolder(ChunkPos pos, int level, LevelHeightAccessor world, LevelLightEngine lightingProvider, ChunkHolder.LevelChangeListener levelUpdateListener, ChunkHolder.PlayerProvider playersWatchingChunkProvider) { -- this.futures = new AtomicReferenceArray(ChunkHolder.CHUNK_STATUSES.size()); -- this.fullChunkFuture = ChunkHolder.UNLOADED_LEVEL_CHUNK_FUTURE; -- this.tickingChunkFuture = ChunkHolder.UNLOADED_LEVEL_CHUNK_FUTURE; -- this.entityTickingChunkFuture = ChunkHolder.UNLOADED_LEVEL_CHUNK_FUTURE; -- this.chunkToSave = CompletableFuture.completedFuture(null); // CraftBukkit - decompile error -+ public final io.papermc.paper.chunk.system.scheduling.NewChunkHolder newChunkHolder; // Paper - rewrite chunk system -+ -+ // Paper start - replace player chunk loader -+ private final com.destroystokyo.paper.util.maplist.ReferenceList playersSentChunkTo = new com.destroystokyo.paper.util.maplist.ReferenceList<>(); -+ -+ public void addPlayer(ServerPlayer player) { -+ if (!this.playersSentChunkTo.add(player)) { -+ throw new IllegalStateException("Already sent chunk " + this.pos + " in world '" + this.chunkMap.level.getWorld().getName() + "' to player " + player); -+ } -+ } -+ -+ public void removePlayer(ServerPlayer player) { -+ if (!this.playersSentChunkTo.remove(player)) { -+ throw new IllegalStateException("Have not sent chunk " + this.pos + " in world '" + this.chunkMap.level.getWorld().getName() + "' to player " + player); -+ } -+ } -+ -+ public boolean hasChunkBeenSent() { -+ return this.playersSentChunkTo.size() != 0; -+ } -+ -+ public boolean hasBeenSent(ServerPlayer to) { -+ return this.playersSentChunkTo.contains(to); -+ } -+ // Paper end - replace player chunk loader -+ public ChunkHolder(ChunkPos pos, LevelHeightAccessor world, LevelLightEngine lightingProvider, ChunkHolder.PlayerProvider playersWatchingChunkProvider, io.papermc.paper.chunk.system.scheduling.NewChunkHolder newChunkHolder) { // Paper - rewrite chunk system -+ this.newChunkHolder = newChunkHolder; // Paper - rewrite chunk system - this.chunkToSaveHistory = null; - this.blockChangedLightSectionFilter = new BitSet(); - this.skyChangedLightSectionFilter = new BitSet(); -- this.pendingFullStateConfirmation = CompletableFuture.completedFuture(null); // CraftBukkit - decompile error -- this.sendSync = CompletableFuture.completedFuture(null); // CraftBukkit - decompile error -+ // Paper - rewrite chunk system - this.pos = pos; - this.levelHeightAccessor = world; - this.lightEngine = lightingProvider; -- this.onLevelChange = levelUpdateListener; -+ this.onLevelChange = null; // Paper - rewrite chunk system - this.playerProvider = playersWatchingChunkProvider; -- this.oldTicketLevel = ChunkLevel.MAX_LEVEL + 1; -- this.ticketLevel = this.oldTicketLevel; -- this.queueLevel = this.oldTicketLevel; -- this.setTicketLevel(level); -+ // Paper - rewrite chunk system - this.changedBlocksPerSection = new ShortSet[world.getSectionsCount()]; - this.chunkMap = (ChunkMap)playersWatchingChunkProvider; // Paper - } - - // Paper start - public @Nullable ChunkAccess getAvailableChunkNow() { -- // TODO can we just getStatusFuture(EMPTY)? -- for (ChunkStatus curr = ChunkStatus.FULL, next = curr.getParent(); curr != next; curr = next, next = next.getParent()) { -- CompletableFuture> future = this.getFutureIfPresentUnchecked(curr); -- ChunkResult either = future.getNow(null); -- if (either == null || either.isSuccess()) { -- continue; -- } -- return either.orElseThrow(IllegalStateException::new); -- } -- return null; -+ return this.newChunkHolder.getCurrentChunk(); // Paper - rewrite chunk system - } - // Paper end - // CraftBukkit start - public LevelChunk getFullChunkNow() { -- // Note: We use the oldTicketLevel for isLoaded checks. -- if (!ChunkLevel.fullStatus(this.oldTicketLevel).isOrAfter(FullChunkStatus.FULL)) return null; -- return this.getFullChunkNowUnchecked(); -+ // Paper start - rewrite chunk system -+ if (!this.isFullChunkReady() || !(this.getAvailableChunkNow() instanceof LevelChunk chunk)) return null; // instanceof to avoid a race condition on off-main threads -+ return chunk; -+ // Paper end - rewrite chunk system - } - - public LevelChunk getFullChunkNowUnchecked() { -- CompletableFuture> statusFuture = this.getFutureIfPresentUnchecked(ChunkStatus.FULL); -- ChunkResult either = statusFuture.getNow(null); -- return (either == null) ? null : (LevelChunk) either.orElse(null); -+ // Paper start - rewrite chunk system -+ return this.getAvailableChunkNow() instanceof LevelChunk chunk ? chunk : null; -+ // Paper end - rewrite chunk system - } - // CraftBukkit end - - public CompletableFuture> getFutureIfPresentUnchecked(ChunkStatus leastStatus) { -- CompletableFuture> completablefuture = (CompletableFuture) this.futures.get(leastStatus.getIndex()); -- -- return completablefuture == null ? ChunkHolder.UNLOADED_CHUNK_FUTURE : completablefuture; -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - public CompletableFuture> getFutureIfPresent(ChunkStatus leastStatus) { -- return ChunkLevel.generationStatus(this.ticketLevel).isOrAfter(leastStatus) ? this.getFutureIfPresentUnchecked(leastStatus) : ChunkHolder.UNLOADED_CHUNK_FUTURE; -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - public final CompletableFuture> getTickingChunkFuture() { // Paper - final for inline -- return this.tickingChunkFuture; -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - public final CompletableFuture> getEntityTickingChunkFuture() { // Paper - final for inline -- return this.entityTickingChunkFuture; -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk systemv - } - - public final CompletableFuture> getFullChunkFuture() { // Paper - final for inline -- return this.fullChunkFuture; -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk systemv - } - - @Nullable - public final LevelChunk getTickingChunk() { // Paper - final for inline -- return (LevelChunk) ((ChunkResult) this.getTickingChunkFuture().getNow(ChunkHolder.UNLOADED_LEVEL_CHUNK)).orElse(null); // CraftBukkit - decompile error -+ // Paper start - rewrite chunk system -+ if (!this.isTickingReady()) { -+ return null; -+ } -+ return (LevelChunk)this.getAvailableChunkNow(); -+ // Paper end - rewrite chunk system - } - - public CompletableFuture getChunkSendSyncFuture() { -- return this.sendSync; -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - @Nullable - public LevelChunk getChunkToSend() { -- return !this.sendSync.isDone() ? null : this.getTickingChunk(); -+ return this.getSendingChunk(); // Paper - rewrite chunk system - } - - @Nullable - public ChunkStatus getLastAvailableStatus() { -- for (int i = ChunkHolder.CHUNK_STATUSES.size() - 1; i >= 0; --i) { -- ChunkStatus chunkstatus = (ChunkStatus) ChunkHolder.CHUNK_STATUSES.get(i); -- CompletableFuture> completablefuture = this.getFutureIfPresentUnchecked(chunkstatus); -- -- if (((ChunkResult) completablefuture.getNow(ChunkHolder.UNLOADED_CHUNK)).isSuccess()) { -- return chunkstatus; -- } -- } -- -- return null; -+ return this.newChunkHolder.getCurrentGenStatus(); // Paper - rewrite chunk system - } - - // Paper start - public @Nullable ChunkStatus getChunkHolderStatus() { -- for (ChunkStatus curr = ChunkStatus.FULL, next = curr.getParent(); curr != next; curr = next, next = next.getParent()) { -- CompletableFuture> future = this.getFutureIfPresentUnchecked(curr); -- ChunkResult either = future.getNow(null); -- if (either == null || !either.isSuccess()) { -- continue; -- } -- return curr; -- } -- -- return null; -+ return this.newChunkHolder.getCurrentGenStatus(); // Paper - rewrite chunk system - } - // Paper end - - @Nullable - public ChunkAccess getLastAvailable() { -- for (int i = ChunkHolder.CHUNK_STATUSES.size() - 1; i >= 0; --i) { -- ChunkStatus chunkstatus = (ChunkStatus) ChunkHolder.CHUNK_STATUSES.get(i); -- CompletableFuture> completablefuture = this.getFutureIfPresentUnchecked(chunkstatus); -- -- if (!completablefuture.isCompletedExceptionally()) { -- ChunkAccess ichunkaccess = (ChunkAccess) ((ChunkResult) completablefuture.getNow(ChunkHolder.UNLOADED_CHUNK)).orElse((Object) null); -- -- if (ichunkaccess != null) { -- return ichunkaccess; -- } -- } -- } -- -- return null; -+ return this.newChunkHolder.getCurrentChunk(); // Paper - rewrite chunk system - } - -- public final CompletableFuture getChunkToSave() { // Paper - final for inline -- return this.chunkToSave; -- } -+ // Paper - rewrite chunk system - - public void blockChanged(BlockPos pos) { -- LevelChunk chunk = this.getTickingChunk(); -+ // Paper start - replace player chunk loader -+ if (this.playersSentChunkTo.size() == 0) { -+ return; -+ } -+ // Paper end - replace player chunk loader -+ LevelChunk chunk = this.getSendingChunk(); // Paper - no-tick view distance - - if (chunk != null) { - int i = this.levelHeightAccessor.getSectionIndex(pos.getY()); -@@ -237,13 +225,13 @@ public class ChunkHolder { - } - - public void sectionLightChanged(LightLayer lightType, int y) { -- ChunkAccess ichunkaccess = (ChunkAccess) ((ChunkResult) this.getFutureIfPresent(ChunkStatus.INITIALIZE_LIGHT).getNow(ChunkHolder.UNLOADED_CHUNK)).orElse(null); // CraftBukkit - decompile error -+ ChunkAccess ichunkaccess = this.getAvailableChunkNow(); // Paper - rewrite chunk system - - if (ichunkaccess != null) { - ichunkaccess.setUnsaved(true); -- LevelChunk chunk = this.getTickingChunk(); -+ LevelChunk chunk = this.getSendingChunk(); // Paper - rewrite chunk system - -- if (chunk != null) { -+ if (this.playersSentChunkTo.size() != 0 && chunk != null) { // Paper - replace player chunk loader - int j = this.lightEngine.getMinLightSection(); - int k = this.lightEngine.getMaxLightSection(); - -@@ -263,7 +251,7 @@ public class ChunkHolder { - - // Paper start - starlight - public void broadcast(Packet packet, boolean onChunkViewEdge) { -- this.broadcast(this.playerProvider.getPlayers(this.pos, onChunkViewEdge), packet); -+ this.broadcast(this.getPlayers(onChunkViewEdge), packet); // Paper - rewrite chunk system - } - // Paper end - starlight - -@@ -273,7 +261,7 @@ public class ChunkHolder { - List list; - - if (!this.skyChangedLightSectionFilter.isEmpty() || !this.blockChangedLightSectionFilter.isEmpty()) { -- list = this.playerProvider.getPlayers(this.pos, true); -+ list = this.getPlayers(true); // Paper - rewrite chunk system - if (!list.isEmpty()) { - ClientboundLightUpdatePacket packetplayoutlightupdate = new ClientboundLightUpdatePacket(chunk.getPos(), this.lightEngine, this.skyChangedLightSectionFilter, this.blockChangedLightSectionFilter); - -@@ -285,7 +273,7 @@ public class ChunkHolder { - } - - if (this.hasChangedSections) { -- list = this.playerProvider.getPlayers(this.pos, false); -+ list = this.getPlayers(false); // Paper - rewrite chunk system - - for (int i = 0; i < this.changedBlocksPerSection.length; ++i) { - ShortSet shortset = this.changedBlocksPerSection[i]; -@@ -343,75 +331,33 @@ public class ChunkHolder { - - } - -- private void broadcast(List players, Packet packet) { -- players.forEach((entityplayer) -> { -- entityplayer.connection.send(packet); -- }); -- } -- -- public CompletableFuture> getOrScheduleFuture(ChunkStatus targetStatus, ChunkMap chunkStorage) { -- int i = targetStatus.getIndex(); -- CompletableFuture> completablefuture = (CompletableFuture) this.futures.get(i); -+ // Paper start - rewrite chunk system -+ public List getPlayers(boolean onlyOnWatchDistanceEdge) { -+ List ret = new java.util.ArrayList<>(); - -- if (completablefuture != null) { -- ChunkResult chunkresult = (ChunkResult) completablefuture.getNow(ChunkHolder.NOT_DONE_YET); -- -- if (chunkresult == null) { -- String s = String.valueOf(targetStatus); -- String s1 = "value in future for status: " + s + " was incorrectly set to null at chunk: " + String.valueOf(this.pos); -- -- throw chunkStorage.debugFuturesAndCreateReportedException(new IllegalStateException("null value previously set for chunk status"), s1); -- } -- -- if (chunkresult == ChunkHolder.NOT_DONE_YET || chunkresult.isSuccess()) { -- return completablefuture; -+ for (int i = 0, len = this.playersSentChunkTo.size(); i < len; ++i) { -+ ServerPlayer player = this.playersSentChunkTo.getUnchecked(i); -+ if (onlyOnWatchDistanceEdge && !this.chunkMap.level.playerChunkLoader.isChunkSent(player, this.pos.x, this.pos.z, onlyOnWatchDistanceEdge)) { -+ continue; - } -+ ret.add(player); - } - -- if (ChunkLevel.generationStatus(this.ticketLevel).isOrAfter(targetStatus)) { -- CompletableFuture> completablefuture1 = chunkStorage.schedule(this, targetStatus); -- -- this.updateChunkToSave(completablefuture1, "schedule " + String.valueOf(targetStatus)); -- this.futures.set(i, completablefuture1); -- return completablefuture1; -- } else { -- return completablefuture == null ? ChunkHolder.UNLOADED_CHUNK_FUTURE : completablefuture; -- } -+ return ret; - } -+ // Paper end - rewrite chunk system - -- protected void addSaveDependency(String thenDesc, CompletableFuture then) { -- if (this.chunkToSaveHistory != null) { -- this.chunkToSaveHistory.push(new ChunkHolder.ChunkSaveDebug(Thread.currentThread(), then, thenDesc)); -- } - -- this.chunkToSave = this.chunkToSave.thenCombine(then, (ichunkaccess, object) -> { -- return ichunkaccess; -- }); -- } -- -- private void updateChunkToSave(CompletableFuture> then, String thenDesc) { -- if (this.chunkToSaveHistory != null) { -- this.chunkToSaveHistory.push(new ChunkHolder.ChunkSaveDebug(Thread.currentThread(), then, thenDesc)); -- } -- -- this.chunkToSave = this.chunkToSave.thenCombine(then, (ichunkaccess, chunkresult) -> { -- return (ChunkAccess) ChunkResult.orElse(chunkresult, ichunkaccess); -+ private void broadcast(List players, Packet packet) { -+ players.forEach((entityplayer) -> { -+ entityplayer.connection.send(packet); - }); - } - -- public void addSendDependency(CompletableFuture postProcessingFuture) { -- if (this.sendSync.isDone()) { -- this.sendSync = postProcessingFuture; -- } else { -- this.sendSync = this.sendSync.thenCombine(postProcessingFuture, (object, object1) -> { -- return null; -- }); -- } -- -- } -+ // Paper - rewrite chunk system - - public FullChunkStatus getFullStatus() { -- return ChunkLevel.fullStatus(this.ticketLevel); -+ return this.newChunkHolder.getChunkStatus(); // Paper - rewrite chunk system - } - - public final ChunkPos getPos() { // Paper - final for inline -@@ -419,238 +365,17 @@ public class ChunkHolder { - } - - public final int getTicketLevel() { // Paper - final for inline -- return this.ticketLevel; -- } -- -- public int getQueueLevel() { -- return this.queueLevel; -- } -- -- private void setQueueLevel(int level) { -- this.queueLevel = level; -- } -- -- public void setTicketLevel(int level) { -- this.ticketLevel = level; -- } -- -- private void scheduleFullChunkPromotion(ChunkMap playerchunkmap, CompletableFuture> completablefuture, Executor executor, FullChunkStatus fullchunkstatus) { -- this.pendingFullStateConfirmation.cancel(false); -- CompletableFuture completablefuture1 = new CompletableFuture(); -- -- completablefuture1.thenRunAsync(() -> { -- playerchunkmap.onFullChunkStatusChange(this.pos, fullchunkstatus); -- }, executor); -- this.pendingFullStateConfirmation = completablefuture1; -- completablefuture.thenAccept((chunkresult) -> { -- chunkresult.ifSuccess((chunk) -> { -- completablefuture1.complete(null); // CraftBukkit - decompile error -- }); -- }); -- } -- -- private void demoteFullChunk(ChunkMap playerchunkmap, FullChunkStatus fullchunkstatus) { -- this.pendingFullStateConfirmation.cancel(false); -- playerchunkmap.onFullChunkStatusChange(this.pos, fullchunkstatus); -- } -- -- protected void updateFutures(ChunkMap chunkStorage, Executor executor) { -- ChunkStatus chunkstatus = ChunkLevel.generationStatus(this.oldTicketLevel); -- ChunkStatus chunkstatus1 = ChunkLevel.generationStatus(this.ticketLevel); -- boolean flag = ChunkLevel.isLoaded(this.oldTicketLevel); -- boolean flag1 = ChunkLevel.isLoaded(this.ticketLevel); -- FullChunkStatus fullchunkstatus = ChunkLevel.fullStatus(this.oldTicketLevel); -- FullChunkStatus fullchunkstatus1 = ChunkLevel.fullStatus(this.ticketLevel); -- // CraftBukkit start -- // ChunkUnloadEvent: Called before the chunk is unloaded: isChunkLoaded is still true and chunk can still be modified by plugins. -- if (fullchunkstatus.isOrAfter(FullChunkStatus.FULL) && !fullchunkstatus1.isOrAfter(FullChunkStatus.FULL)) { -- this.getFutureIfPresentUnchecked(ChunkStatus.FULL).thenAccept((either) -> { -- LevelChunk chunk = (LevelChunk) either.orElse(null); -- if (chunk != null) { -- chunkStorage.callbackExecutor.execute(() -> { -- // Minecraft will apply the chunks tick lists to the world once the chunk got loaded, and then store the tick -- // lists again inside the chunk once the chunk becomes inaccessible and set the chunk's needsSaving flag. -- // These actions may however happen deferred, so we manually set the needsSaving flag already here. -- chunk.setUnsaved(true); -- chunk.unloadCallback(); -- }); -- } -- }).exceptionally((throwable) -> { -- // ensure exceptions are printed, by default this is not the case -- MinecraftServer.LOGGER.error("Failed to schedule unload callback for chunk " + ChunkHolder.this.pos, throwable); -- return null; -- }); -- -- // Run callback right away if the future was already done -- chunkStorage.callbackExecutor.run(); -- } -- // CraftBukkit end -- -- if (flag) { -- ChunkResult chunkresult = ChunkResult.error(() -> { -- return "Unloaded ticket level " + String.valueOf(this.pos); -- }); -- -- for (int i = flag1 ? chunkstatus1.getIndex() + 1 : 0; i <= chunkstatus.getIndex(); ++i) { -- CompletableFuture> completablefuture = (CompletableFuture) this.futures.get(i); -- -- if (completablefuture == null) { -- this.futures.set(i, CompletableFuture.completedFuture(chunkresult)); -- } -- } -- } -- -- boolean flag2 = fullchunkstatus.isOrAfter(FullChunkStatus.FULL); -- boolean flag3 = fullchunkstatus1.isOrAfter(FullChunkStatus.FULL); -- -- this.wasAccessibleSinceLastSave |= flag3; -- if (!flag2 && flag3) { -- int expectCreateCount = ++this.fullChunkCreateCount; // Paper -- this.fullChunkFuture = chunkStorage.prepareAccessibleChunk(this); -- this.scheduleFullChunkPromotion(chunkStorage, this.fullChunkFuture, executor, FullChunkStatus.FULL); -- // Paper start - cache ticking ready status -- this.fullChunkFuture.thenAccept(chunkResult -> { -- chunkResult.ifSuccess(chunk -> { -- if (ChunkHolder.this.fullChunkCreateCount == expectCreateCount) { -- ChunkHolder.this.isFullChunkReady = true; -- io.papermc.paper.chunk.system.ChunkSystem.onChunkBorder(chunk, this); -- } -- }); -- }); -- this.updateChunkToSave(this.fullChunkFuture, "full"); -- } -- -- if (flag2 && !flag3) { -- // Paper start -- if (this.isFullChunkReady) { -- io.papermc.paper.chunk.system.ChunkSystem.onChunkNotBorder(this.fullChunkFuture.join().orElseThrow(IllegalStateException::new), this); // Paper -- } -- // Paper end -- this.fullChunkFuture.complete(ChunkHolder.UNLOADED_LEVEL_CHUNK); -- this.fullChunkFuture = ChunkHolder.UNLOADED_LEVEL_CHUNK_FUTURE; -- ++this.fullChunkCreateCount; // Paper - cache ticking ready status -- this.isFullChunkReady = false; // Paper - cache ticking ready status -- } -- -- boolean flag4 = fullchunkstatus.isOrAfter(FullChunkStatus.BLOCK_TICKING); -- boolean flag5 = fullchunkstatus1.isOrAfter(FullChunkStatus.BLOCK_TICKING); -- -- if (!flag4 && flag5) { -- this.tickingChunkFuture = chunkStorage.prepareTickingChunk(this); -- this.scheduleFullChunkPromotion(chunkStorage, this.tickingChunkFuture, executor, FullChunkStatus.BLOCK_TICKING); -- // Paper start - cache ticking ready status -- this.tickingChunkFuture.thenAccept(chunkResult -> { -- chunkResult.ifSuccess(chunk -> { -- // note: Here is a very good place to add callbacks to logic waiting on this. -- ChunkHolder.this.isTickingReady = true; -- io.papermc.paper.chunk.system.ChunkSystem.onChunkTicking(chunk, this); -- }); -- }); -- // Paper end -- this.updateChunkToSave(this.tickingChunkFuture, "ticking"); -- } -- -- if (flag4 && !flag5) { -- // Paper start -- if (this.isTickingReady) { -- io.papermc.paper.chunk.system.ChunkSystem.onChunkNotTicking(this.tickingChunkFuture.join().orElseThrow(IllegalStateException::new), this); // Paper -- } -- // Paper end -- this.tickingChunkFuture.complete(ChunkHolder.UNLOADED_LEVEL_CHUNK); this.isTickingReady = false; // Paper - cache chunk ticking stage -- this.tickingChunkFuture = ChunkHolder.UNLOADED_LEVEL_CHUNK_FUTURE; -- } -- -- boolean flag6 = fullchunkstatus.isOrAfter(FullChunkStatus.ENTITY_TICKING); -- boolean flag7 = fullchunkstatus1.isOrAfter(FullChunkStatus.ENTITY_TICKING); -- -- if (!flag6 && flag7) { -- if (this.entityTickingChunkFuture != ChunkHolder.UNLOADED_LEVEL_CHUNK_FUTURE) { -- throw (IllegalStateException) Util.pauseInIde(new IllegalStateException()); -- } -- -- this.entityTickingChunkFuture = chunkStorage.prepareEntityTickingChunk(this); -- this.scheduleFullChunkPromotion(chunkStorage, this.entityTickingChunkFuture, executor, FullChunkStatus.ENTITY_TICKING); -- // Paper start - cache ticking ready status -- this.entityTickingChunkFuture.thenAccept(chunkResult -> { -- chunkResult.ifSuccess(chunk -> { -- ChunkHolder.this.isEntityTickingReady = true; -- io.papermc.paper.chunk.system.ChunkSystem.onChunkEntityTicking(chunk, this); -- }); -- }); -- // Paper end -- this.updateChunkToSave(this.entityTickingChunkFuture, "entity ticking"); -- } -- -- if (flag6 && !flag7) { -- // Paper start -- if (this.isEntityTickingReady) { -- io.papermc.paper.chunk.system.ChunkSystem.onChunkNotEntityTicking(this.entityTickingChunkFuture.join().orElseThrow(IllegalStateException::new), this); -- } -- // Paper end -- this.entityTickingChunkFuture.complete(ChunkHolder.UNLOADED_LEVEL_CHUNK); this.isEntityTickingReady = false; // Paper - cache chunk ticking stage -- this.entityTickingChunkFuture = ChunkHolder.UNLOADED_LEVEL_CHUNK_FUTURE; -- } -- -- if (!fullchunkstatus1.isOrAfter(fullchunkstatus)) { -- this.demoteFullChunk(chunkStorage, fullchunkstatus1); -- } -- -- this.onLevelChange.onLevelChange(this.pos, this::getQueueLevel, this.ticketLevel, this::setQueueLevel); -- this.oldTicketLevel = this.ticketLevel; -- // CraftBukkit start -- // ChunkLoadEvent: Called after the chunk is loaded: isChunkLoaded returns true and chunk is ready to be modified by plugins. -- if (!fullchunkstatus.isOrAfter(FullChunkStatus.FULL) && fullchunkstatus1.isOrAfter(FullChunkStatus.FULL)) { -- this.getFutureIfPresentUnchecked(ChunkStatus.FULL).thenAccept((either) -> { -- LevelChunk chunk = (LevelChunk) either.orElse(null); -- if (chunk != null) { -- chunkStorage.callbackExecutor.execute(() -> { -- chunk.loadCallback(); -- }); -- } -- }).exceptionally((throwable) -> { -- // ensure exceptions are printed, by default this is not the case -- MinecraftServer.LOGGER.error("Failed to schedule load callback for chunk " + ChunkHolder.this.pos, throwable); -- return null; -- }); -- -- // Run callback right away if the future was already done -- chunkStorage.callbackExecutor.run(); -- } -- // CraftBukkit end -- } -- -- public boolean wasAccessibleSinceLastSave() { -- return this.wasAccessibleSinceLastSave; -+ return this.newChunkHolder.getTicketLevel(); // Paper - rewrite chunk system - } - -- public void refreshAccessibility() { -- this.wasAccessibleSinceLastSave = ChunkLevel.fullStatus(this.ticketLevel).isOrAfter(FullChunkStatus.FULL); -- } -+ // Paper - rewrite chunk system - - public void replaceProtoChunk(ImposterProtoChunk chunk) { -- for (int i = 0; i < this.futures.length(); ++i) { -- CompletableFuture> completablefuture = (CompletableFuture) this.futures.get(i); -- -- if (completablefuture != null) { -- ChunkAccess ichunkaccess = (ChunkAccess) ((ChunkResult) completablefuture.getNow(ChunkHolder.UNLOADED_CHUNK)).orElse((Object) null); -- -- if (ichunkaccess instanceof ProtoChunk) { -- this.futures.set(i, CompletableFuture.completedFuture(ChunkResult.of(chunk))); -- } -- } -- } -- -- this.updateChunkToSave(CompletableFuture.completedFuture(ChunkResult.of(chunk.getWrapped())), "replaceProto"); -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - public List>>> getAllFutures() { -- List>>> list = new ArrayList(); -- -- for (int i = 0; i < ChunkHolder.CHUNK_STATUSES.size(); ++i) { -- list.add(Pair.of((ChunkStatus) ChunkHolder.CHUNK_STATUSES.get(i), (CompletableFuture) this.futures.get(i))); -- } -- -- return list; -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - @FunctionalInterface -@@ -670,15 +395,15 @@ public class ChunkHolder { - - // Paper start - public final boolean isEntityTickingReady() { -- return this.isEntityTickingReady; -+ return this.newChunkHolder.isEntityTickingReady(); // Paper - rewrite chunk system - } - - public final boolean isTickingReady() { -- return this.isTickingReady; -+ return this.newChunkHolder.isTickingReady(); // Paper - rewrite chunk system - } - - public final boolean isFullChunkReady() { -- return this.isFullChunkReady; -+ return this.newChunkHolder.isFullChunkReady(); // Paper - rewrite chunk system - } - // Paper end - } -diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java -index d3f63185edd1db9fab3887ea3f08982435b3a23c..d6ecee1db17cb9eaeffa94b3d8dd150238fdefe5 100644 ---- a/src/main/java/net/minecraft/server/level/ChunkMap.java -+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java -@@ -122,10 +122,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - public static final int MIN_VIEW_DISTANCE = 2; - public static final int MAX_VIEW_DISTANCE = 32; - public static final int FORCED_TICKET_LEVEL = ChunkLevel.byStatus(FullChunkStatus.ENTITY_TICKING); -- public final Long2ObjectLinkedOpenHashMap updatingChunkMap = new Long2ObjectLinkedOpenHashMap(); -- public volatile Long2ObjectLinkedOpenHashMap visibleChunkMap; -- private final Long2ObjectLinkedOpenHashMap pendingUnloads; -- private final LongSet entitiesInLevel; -+ // Paper - rewrite chunk system - public final ServerLevel level; - private final ThreadedLevelLightEngine lightEngine; - public final BlockableEventLoop mainThreadExecutor; // Paper - public -@@ -134,15 +131,13 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - private final ChunkGeneratorStructureState chunkGeneratorState; - public final Supplier overworldDataStorage; - private final PoiManager poiManager; -- public final LongSet toDrop; -+ // Paper - rewrite chunk system - private boolean modified; -- private final ChunkTaskPriorityQueueSorter queueSorter; -- private final ProcessorHandle> worldgenMailbox; -- private final ProcessorHandle> mainThreadMailbox; -+ // Paper - rewrite chunk system - public final ChunkProgressListener progressListener; - private final ChunkStatusUpdateListener chunkStatusListener; - public final ChunkMap.ChunkDistanceManager distanceManager; -- private final AtomicInteger tickingGenerated; -+ public final AtomicInteger tickingGenerated; // Paper - public - private final String storageName; - private final PlayerMap playerMap; - public final Int2ObjectMap entityMap; -@@ -150,28 +145,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - private final Long2LongMap chunkSaveCooldowns; - private final Queue unloadQueue; - public int serverViewDistance; -- private WorldGenContext worldGenContext; -- -- // CraftBukkit start - recursion-safe executor for Chunk loadCallback() and unloadCallback() -- public final CallbackExecutor callbackExecutor = new CallbackExecutor(); -- public static final class CallbackExecutor implements java.util.concurrent.Executor, Runnable { -- -- private final java.util.Queue queue = new java.util.ArrayDeque<>(); -- -- @Override -- public void execute(Runnable runnable) { -- this.queue.add(runnable); -- } -- -- @Override -- public void run() { -- Runnable task; -- while ((task = this.queue.poll()) != null) { -- task.run(); -- } -- } -- }; -- // CraftBukkit end -+ private WorldGenContext worldGenContext; public final WorldGenContext getWorldGenContext() { return this.worldGenContext; } // Paper - rewrite chunk system - - // Paper start - distance maps - private final com.destroystokyo.paper.util.misc.PooledLinkedHashSets pooledLinkedPlayerHashSets = new com.destroystokyo.paper.util.misc.PooledLinkedHashSets<>(); -@@ -181,6 +155,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - int chunkZ = io.papermc.paper.util.MCUtil.getChunkCoordinate(player.getZ()); - // Note: players need to be explicitly added to distance maps before they can be updated - this.nearbyPlayers.addPlayer(player); -+ this.level.playerChunkLoader.addPlayer(player); // Paper - replace chunk loader - } - - void removePlayerFromDistanceMaps(ServerPlayer player) { -@@ -188,6 +163,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - int chunkZ = io.papermc.paper.util.MCUtil.getChunkCoordinate(player.getZ()); - // Note: players need to be explicitly added to distance maps before they can be updated - this.nearbyPlayers.removePlayer(player); -+ this.level.playerChunkLoader.removePlayer(player); // Paper - replace chunk loader - } - - void updateMaps(ServerPlayer player) { -@@ -195,6 +171,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - int chunkZ = io.papermc.paper.util.MCUtil.getChunkCoordinate(player.getZ()); - // Note: players need to be explicitly added to distance maps before they can be updated - this.nearbyPlayers.tickPlayer(player); -+ this.level.playerChunkLoader.updatePlayer(player); // Paper - replace chunk loader - } - // Paper end - // Paper start -@@ -224,17 +201,14 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - } - - public final ChunkHolder getUnloadingChunkHolder(int chunkX, int chunkZ) { -- return this.pendingUnloads.get(io.papermc.paper.util.CoordinateUtils.getChunkKey(chunkX, chunkZ)); -+ return null; // Paper - rewrite chunk system - } - public final io.papermc.paper.util.player.NearbyPlayers nearbyPlayers; - // Paper end - - public ChunkMap(ServerLevel world, LevelStorageSource.LevelStorageAccess session, DataFixer dataFixer, StructureTemplateManager structureTemplateManager, Executor executor, BlockableEventLoop mainThreadExecutor, LightChunkGetter chunkProvider, ChunkGenerator chunkGenerator, ChunkProgressListener worldGenerationProgressListener, ChunkStatusUpdateListener chunkStatusChangeListener, Supplier persistentStateManagerFactory, int viewDistance, boolean dsync) { - super(new RegionStorageInfo(session.getLevelId(), world.dimension(), "chunk"), session.getDimensionPath(world.dimension()).resolve("region"), dataFixer, dsync); -- this.visibleChunkMap = this.updatingChunkMap.clone(); -- this.pendingUnloads = new Long2ObjectLinkedOpenHashMap(); -- this.entitiesInLevel = new LongOpenHashSet(); -- this.toDrop = new LongOpenHashSet(); -+ // Paper - rewrite chunk system - this.tickingGenerated = new AtomicInteger(); - this.playerMap = new PlayerMap(); - this.entityMap = new Int2ObjectOpenHashMap(); -@@ -263,19 +237,17 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - - this.chunkGeneratorState = chunkGenerator.createState(iregistrycustom.lookupOrThrow(Registries.STRUCTURE_SET), this.randomState, j, world.spigotConfig); // Spigot - this.mainThreadExecutor = mainThreadExecutor; -- ProcessorMailbox threadedmailbox = ProcessorMailbox.create(executor, "worldgen"); -+ // Paper - rewrite chunk system - - Objects.requireNonNull(mainThreadExecutor); -- ProcessorHandle mailbox = ProcessorHandle.of("main", mainThreadExecutor::tell); -+ // Paper - rewrite chunk system - - this.progressListener = worldGenerationProgressListener; - this.chunkStatusListener = chunkStatusChangeListener; -- ProcessorMailbox threadedmailbox1 = ProcessorMailbox.create(executor, "light"); -+ // Paper - rewrite chunk system - -- this.queueSorter = new ChunkTaskPriorityQueueSorter(ImmutableList.of(threadedmailbox, mailbox, threadedmailbox1), executor, Integer.MAX_VALUE); -- this.worldgenMailbox = this.queueSorter.getProcessor(threadedmailbox, false); -- this.mainThreadMailbox = this.queueSorter.getProcessor(mailbox, false); -- this.lightEngine = new ThreadedLevelLightEngine(chunkProvider, this, this.level.dimensionType().hasSkyLight(), threadedmailbox1, this.queueSorter.getProcessor(threadedmailbox1, false)); -+ // Paper - rewrite chunk system -+ this.lightEngine = new ThreadedLevelLightEngine(chunkProvider, this, this.level.dimensionType().hasSkyLight(), null, null); // Paper - rewrite chunk system - this.distanceManager = new ChunkMap.ChunkDistanceManager(executor, mainThreadExecutor); - this.overworldDataStorage = persistentStateManagerFactory; - this.poiManager = new PoiManager(new RegionStorageInfo(session.getLevelId(), world.dimension(), "poi"), path.resolve("poi"), dataFixer, dsync, iregistrycustom, world); -@@ -333,23 +305,15 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - } - - boolean isChunkTracked(ServerPlayer player, int chunkX, int chunkZ) { -- return player.getChunkTrackingView().contains(chunkX, chunkZ) && !player.connection.chunkSender.isPending(ChunkPos.asLong(chunkX, chunkZ)); -+ // Paper start - rewrite player chunk loader -+ return this.level.playerChunkLoader.isChunkSent(player, chunkX, chunkZ); -+ // Paper end - rewrite player chunk loader - } - - private boolean isChunkOnTrackedBorder(ServerPlayer player, int chunkX, int chunkZ) { -- if (!this.isChunkTracked(player, chunkX, chunkZ)) { -- return false; -- } else { -- for (int k = -1; k <= 1; ++k) { -- for (int l = -1; l <= 1; ++l) { -- if ((k != 0 || l != 0) && !this.isChunkTracked(player, chunkX + k, chunkZ + l)) { -- return true; -- } -- } -- } -- -- return false; -- } -+ // Paper start - rewrite player chunk loader -+ return this.level.playerChunkLoader.isChunkSent(player, chunkX, chunkZ, true); -+ // Paper end - rewrite player chunk loader - } - - protected ThreadedLevelLightEngine getLightEngine() { -@@ -358,20 +322,22 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - - @Nullable - protected ChunkHolder getUpdatingChunkIfPresent(long pos) { -- return (ChunkHolder) this.updatingChunkMap.get(pos); -+ // Paper start - rewrite chunk system -+ io.papermc.paper.chunk.system.scheduling.NewChunkHolder holder = this.level.chunkTaskScheduler.chunkHolderManager.getChunkHolder(pos); -+ return holder == null ? null : holder.vanillaChunkHolder; -+ // Paper end - rewrite chunk system - } - - @Nullable - public ChunkHolder getVisibleChunkIfPresent(long pos) { -- return (ChunkHolder) this.visibleChunkMap.get(pos); -+ // Paper start - rewrite chunk system -+ io.papermc.paper.chunk.system.scheduling.NewChunkHolder holder = this.level.chunkTaskScheduler.chunkHolderManager.getChunkHolder(pos); -+ return holder == null ? null : holder.vanillaChunkHolder; -+ // Paper end - rewrite chunk system - } - - protected IntSupplier getChunkQueueLevel(long pos) { -- return () -> { -- ChunkHolder playerchunk = this.getVisibleChunkIfPresent(pos); -- -- return playerchunk == null ? ChunkTaskPriorityQueue.PRIORITY_LEVEL_COUNT - 1 : Math.min(playerchunk.getQueueLevel(), ChunkTaskPriorityQueue.PRIORITY_LEVEL_COUNT - 1); -- }; -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - public String getChunkDebugData(ChunkPos chunkPos) { -@@ -400,80 +366,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - } - - private CompletableFuture>> getChunkRangeFuture(ChunkHolder centerChunk, int margin, IntFunction distanceToStatus) { -- if (margin == 0) { -- ChunkStatus chunkstatus = (ChunkStatus) distanceToStatus.apply(0); -- -- return centerChunk.getOrScheduleFuture(chunkstatus, this).thenApply((chunkresult) -> { -- return chunkresult.map(List::of); -- }); -- } else { -- List>> list = new ArrayList(); -- List list1 = new ArrayList(); -- ChunkPos chunkcoordintpair = centerChunk.getPos(); -- int j = chunkcoordintpair.x; -- int k = chunkcoordintpair.z; -- -- for (int l = -margin; l <= margin; ++l) { -- for (int i1 = -margin; i1 <= margin; ++i1) { -- int j1 = Math.max(Math.abs(i1), Math.abs(l)); -- ChunkPos chunkcoordintpair1 = new ChunkPos(j + i1, k + l); -- long k1 = chunkcoordintpair1.toLong(); -- ChunkHolder playerchunk1 = this.getUpdatingChunkIfPresent(k1); -- -- if (playerchunk1 == null) { -- return CompletableFuture.completedFuture(ChunkResult.error(() -> { -- return "Unloaded " + String.valueOf(chunkcoordintpair1); -- })); -- } -- -- ChunkStatus chunkstatus1 = (ChunkStatus) distanceToStatus.apply(j1); -- CompletableFuture> completablefuture = playerchunk1.getOrScheduleFuture(chunkstatus1, this); -- -- list1.add(playerchunk1); -- list.add(completablefuture); -- } -- } -- -- CompletableFuture>> completablefuture1 = Util.sequence(list); -- CompletableFuture>> completablefuture2 = completablefuture1.thenApply((list2) -> { -- List list3 = Lists.newArrayList(); -- // CraftBukkit start - decompile error -- int cnt = 0; -- -- for (Iterator iterator = list2.iterator(); iterator.hasNext(); ++cnt) { -- final int l1 = cnt; -- // CraftBukkit end -- ChunkResult chunkresult = (ChunkResult) iterator.next(); -- -- if (chunkresult == null) { -- throw this.debugFuturesAndCreateReportedException(new IllegalStateException("At least one of the chunk futures were null"), "n/a"); -- } -- -- ChunkAccess ichunkaccess = (ChunkAccess) chunkresult.orElse(null); // CraftBukkit - decompile error -- -- if (ichunkaccess == null) { -- return ChunkResult.error(() -> { -- String s = String.valueOf(new ChunkPos(j + l1 % (margin * 2 + 1), k + l1 / (margin * 2 + 1))); -- -- return "Unloaded " + s + " " + chunkresult.getError(); -- }); -- } -- -- list3.add(ichunkaccess); -- } -- -- return ChunkResult.of(list3); -- }); -- Iterator iterator = list1.iterator(); -- -- while (iterator.hasNext()) { -- ChunkHolder playerchunk2 = (ChunkHolder) iterator.next(); -- -- playerchunk2.addSaveDependency("getChunkRangeFuture " + String.valueOf(chunkcoordintpair) + " " + margin, completablefuture2); -- } -- -- return completablefuture2; -- } -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - public ReportedException debugFuturesAndCreateReportedException(IllegalStateException exception, String details) { -@@ -503,263 +396,72 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - } - - public CompletableFuture> prepareEntityTickingChunk(ChunkHolder chunk) { -- return this.getChunkRangeFuture(chunk, 2, (i) -> { -- return ChunkStatus.FULL; -- }).thenApplyAsync((chunkresult) -> { -- return chunkresult.map((list) -> { -- return (LevelChunk) list.get(list.size() / 2); -- }); -- }, this.mainThreadExecutor); -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - @Nullable - ChunkHolder updateChunkScheduling(long pos, int level, @Nullable ChunkHolder holder, int k) { -- if (!ChunkLevel.isLoaded(k) && !ChunkLevel.isLoaded(level)) { -- return holder; -- } else { -- if (holder != null) { -- holder.setTicketLevel(level); -- } -- -- if (holder != null) { -- if (!ChunkLevel.isLoaded(level)) { -- this.toDrop.add(pos); -- } else { -- this.toDrop.remove(pos); -- } -- } -- -- if (ChunkLevel.isLoaded(level) && holder == null) { -- holder = (ChunkHolder) this.pendingUnloads.remove(pos); -- if (holder != null) { -- holder.setTicketLevel(level); -- } else { -- holder = new ChunkHolder(new ChunkPos(pos), level, this.level, this.lightEngine, this.queueSorter, this); -- // Paper start -- io.papermc.paper.chunk.system.ChunkSystem.onChunkHolderCreate(this.level, holder); -- // Paper end -- } -- -- // Paper start -- holder.onChunkAdd(); -- // Paper end -- this.updatingChunkMap.put(pos, holder); -- this.modified = true; -- } -- -- return holder; -- } -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - @Override - public void close() throws IOException { -- try { -- this.queueSorter.close(); -- this.poiManager.close(); -- } finally { -- super.close(); -- } -+ throw new UnsupportedOperationException("Use ServerChunkCache#close"); // Paper - rewrite chunk system -+ } - -+ // Paper start - rewrite chunk system -+ protected void saveIncrementally() { -+ this.level.chunkTaskScheduler.chunkHolderManager.autoSave(); // Paper - rewrite chunk system - } -+ // Paper end - - rewrite chunk system - - protected void saveAllChunks(boolean flush) { -- if (flush) { -- List list = io.papermc.paper.chunk.system.ChunkSystem.getVisibleChunkHolders(this.level).stream().filter(ChunkHolder::wasAccessibleSinceLastSave).peek(ChunkHolder::refreshAccessibility).toList(); // Paper -- MutableBoolean mutableboolean = new MutableBoolean(); -- -- do { -- mutableboolean.setFalse(); -- list.stream().map((playerchunk) -> { -- CompletableFuture completablefuture; -- -- do { -- completablefuture = playerchunk.getChunkToSave(); -- BlockableEventLoop iasynctaskhandler = this.mainThreadExecutor; -- -- Objects.requireNonNull(completablefuture); -- iasynctaskhandler.managedBlock(completablefuture::isDone); -- } while (completablefuture != playerchunk.getChunkToSave()); -- -- return (ChunkAccess) completablefuture.join(); -- }).filter((ichunkaccess) -> { -- return ichunkaccess instanceof ImposterProtoChunk || ichunkaccess instanceof LevelChunk; -- }).filter(this::save).forEach((ichunkaccess) -> { -- mutableboolean.setTrue(); -- }); -- } while (mutableboolean.isTrue()); -- -- this.processUnloads(() -> { -- return true; -- }); -- this.flushWorker(); -- } else { -- io.papermc.paper.chunk.system.ChunkSystem.getVisibleChunkHolders(this.level).forEach(this::saveChunkIfNeeded); -- } -- -+ this.level.chunkTaskScheduler.chunkHolderManager.saveAllChunks(flush, false, false); // Paper - rewrite chunk system - } - - protected void tick(BooleanSupplier shouldKeepTicking) { - ProfilerFiller gameprofilerfiller = this.level.getProfiler(); - -+ try (Timing ignored = this.level.timings.poiUnload.startTiming()) { // Paper - gameprofilerfiller.push("poi"); - this.poiManager.tick(shouldKeepTicking); -+ } // Paper - gameprofilerfiller.popPush("chunk_unload"); - if (!this.level.noSave()) { -+ try (Timing ignored = this.level.timings.chunkUnload.startTiming()) { // Paper - this.processUnloads(shouldKeepTicking); -+ } // Paper - } - - gameprofilerfiller.pop(); - } - - public boolean hasWork() { -- return this.lightEngine.hasLightWork() || !this.pendingUnloads.isEmpty() || io.papermc.paper.chunk.system.ChunkSystem.hasAnyChunkHolders(this.level) || this.poiManager.hasWork() || !this.toDrop.isEmpty() || !this.unloadQueue.isEmpty() || this.queueSorter.hasWork() || this.distanceManager.hasTickets(); // Paper -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - private void processUnloads(BooleanSupplier shouldKeepTicking) { -- LongIterator longiterator = this.toDrop.iterator(); -- -- for (int i = 0; longiterator.hasNext() && (shouldKeepTicking.getAsBoolean() || i < 200 || this.toDrop.size() > 2000); longiterator.remove()) { -- long j = longiterator.nextLong(); -- ChunkHolder playerchunk = (ChunkHolder) this.updatingChunkMap.remove(j); -- -- if (playerchunk != null) { -- playerchunk.onChunkRemove(); // Paper -- this.pendingUnloads.put(j, playerchunk); -- this.modified = true; -- ++i; -- this.scheduleUnload(j, playerchunk); -- } -- } -- -- int k = Math.max(0, this.unloadQueue.size() - 2000); -- -- Runnable runnable; -- -- while ((shouldKeepTicking.getAsBoolean() || k > 0) && (runnable = (Runnable) this.unloadQueue.poll()) != null) { -- --k; -- runnable.run(); -- } -- -- int l = 0; -- Iterator objectiterator = io.papermc.paper.chunk.system.ChunkSystem.getVisibleChunkHolders(this.level).iterator(); // Paper -- -- while (l < 20 && shouldKeepTicking.getAsBoolean() && objectiterator.hasNext()) { -- if (this.saveChunkIfNeeded((ChunkHolder) objectiterator.next())) { -- ++l; -- } -- } -+ this.level.chunkTaskScheduler.chunkHolderManager.processUnloads(); // Paper - rewrite chunk system - - } - - private void scheduleUnload(long pos, ChunkHolder holder) { -- CompletableFuture completablefuture = holder.getChunkToSave(); -- Consumer consumer = (ichunkaccess) -> { // CraftBukkit - decompile error -- CompletableFuture completablefuture1 = holder.getChunkToSave(); -- -- if (completablefuture1 != completablefuture) { -- this.scheduleUnload(pos, holder); -- } else { -- // Paper start -- boolean removed; -- if ((removed = this.pendingUnloads.remove(pos, holder)) && ichunkaccess != null) { -- io.papermc.paper.chunk.system.ChunkSystem.onChunkHolderDelete(this.level, holder); -- // Paper end -- if (ichunkaccess instanceof LevelChunk) { -- ((LevelChunk) ichunkaccess).setLoaded(false); -- } -- -- this.save(ichunkaccess); -- if (this.entitiesInLevel.remove(pos) && ichunkaccess instanceof LevelChunk) { -- LevelChunk chunk = (LevelChunk) ichunkaccess; -- -- this.level.unload(chunk); -- } -- -- this.lightEngine.updateChunkStatus(ichunkaccess.getPos()); -- this.lightEngine.tryScheduleUpdate(); -- this.progressListener.onStatusChange(ichunkaccess.getPos(), (ChunkStatus) null); -- this.chunkSaveCooldowns.remove(ichunkaccess.getPos().toLong()); -- } else if (removed) { // Paper start -- io.papermc.paper.chunk.system.ChunkSystem.onChunkHolderDelete(this.level, holder); -- } // Paper end -- -- } -- }; -- Queue queue = this.unloadQueue; -- -- Objects.requireNonNull(this.unloadQueue); -- completablefuture.thenAcceptAsync(consumer, queue::add).whenComplete((ovoid, throwable) -> { -- if (throwable != null) { -- ChunkMap.LOGGER.error("Failed to save chunk {}", holder.getPos(), throwable); -- } -- -- }); -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - protected boolean promoteChunkMap() { -- if (!this.modified) { -- return false; -- } else { -- this.visibleChunkMap = this.updatingChunkMap.clone(); -- this.modified = false; -- return true; -- } -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - public CompletableFuture> schedule(ChunkHolder holder, ChunkStatus requiredStatus) { -- ChunkPos chunkcoordintpair = holder.getPos(); -- -- if (requiredStatus == ChunkStatus.EMPTY) { -- return this.scheduleChunkLoad(chunkcoordintpair).thenApply(ChunkResult::of); -- } else { -- if (requiredStatus == ChunkStatus.LIGHT) { -- this.distanceManager.addTicket(TicketType.LIGHT, chunkcoordintpair, ChunkLevel.byStatus(ChunkStatus.LIGHT), chunkcoordintpair); -- } -- -- if (!requiredStatus.hasLoadDependencies()) { -- ChunkAccess ichunkaccess = (ChunkAccess) ((ChunkResult) holder.getOrScheduleFuture(requiredStatus.getParent(), this).getNow(ChunkHolder.UNLOADED_CHUNK)).orElse((Object) null); -- -- if (ichunkaccess != null && ichunkaccess.getStatus().isOrAfter(requiredStatus)) { -- CompletableFuture completablefuture = requiredStatus.load(this.worldGenContext, (ichunkaccess1) -> { -- return this.protoChunkToFullChunk(holder, ichunkaccess1); -- }, ichunkaccess); -- -- this.progressListener.onStatusChange(chunkcoordintpair, requiredStatus); -- return completablefuture.thenApply(ChunkResult::of); -- } -- } -- -- return this.scheduleChunkGeneration(holder, requiredStatus); -- } -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - private CompletableFuture scheduleChunkLoad(ChunkPos pos) { -- return this.readChunk(pos).thenApply((optional) -> { -- return optional.filter((nbttagcompound) -> { -- boolean flag = ChunkMap.isChunkDataValid(nbttagcompound); -- -- if (!flag) { -- ChunkMap.LOGGER.error("Chunk file at {} is missing level data, skipping", pos); -- } -- -- return flag; -- }); -- }).thenApplyAsync((optional) -> { -- this.level.getProfiler().incrementCounter("chunkLoad"); -- if (optional.isPresent()) { -- ProtoChunk protochunk = ChunkSerializer.read(this.level, this.poiManager, pos, (CompoundTag) optional.get()); -- -- this.markPosition(pos, protochunk.getStatus().getChunkType()); -- return protochunk; -- } else { -- return this.createEmptyChunk(pos); -- } -- }, this.mainThreadExecutor).exceptionallyAsync((throwable) -> { -- return this.handleChunkLoadFailure(throwable, pos); -- }, this.mainThreadExecutor); -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - -- private static boolean isChunkDataValid(CompoundTag nbt) { -+ public static boolean isChunkDataValid(CompoundTag nbt) { // Paper - async chunk loading - return nbt.contains("Status", 8); - } - -@@ -816,60 +518,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - } - - private CompletableFuture> scheduleChunkGeneration(ChunkHolder holder, ChunkStatus requiredStatus) { -- ChunkPos chunkcoordintpair = holder.getPos(); -- CompletableFuture>> completablefuture = this.getChunkRangeFuture(holder, requiredStatus.getRange(), (i) -> { -- return this.getDependencyStatus(requiredStatus, i); -- }); -- -- this.level.getProfiler().incrementCounter(() -> { -- return "chunkGenerate " + String.valueOf(requiredStatus); -- }); -- Executor executor = (runnable) -> { -- this.worldgenMailbox.tell(ChunkTaskPriorityQueueSorter.message(holder, runnable)); -- }; -- -- return completablefuture.thenComposeAsync((chunkresult) -> { -- List list = (List) chunkresult.orElse(null); // CraftBukkit - decompile error -- -- if (list == null) { -- this.releaseLightTicket(chunkcoordintpair); -- Objects.requireNonNull(chunkresult); -- return CompletableFuture.completedFuture(ChunkResult.error(chunkresult::getError)); -- } else { -- try { -- ChunkAccess ichunkaccess = (ChunkAccess) list.get(list.size() / 2); -- CompletableFuture completablefuture1; -- -- if (ichunkaccess.getStatus().isOrAfter(requiredStatus)) { -- completablefuture1 = requiredStatus.load(this.worldGenContext, (ichunkaccess1) -> { -- return this.protoChunkToFullChunk(holder, ichunkaccess1); -- }, ichunkaccess); -- } else { -- completablefuture1 = requiredStatus.generate(this.worldGenContext, executor, (ichunkaccess1) -> { -- return this.protoChunkToFullChunk(holder, ichunkaccess1); -- }, list); -- } -- -- this.progressListener.onStatusChange(chunkcoordintpair, requiredStatus); -- return completablefuture1.thenApply(ChunkResult::of); -- } catch (Exception exception) { -- exception.getStackTrace(); -- CrashReport crashreport = CrashReport.forThrowable(exception, "Exception generating new chunk"); -- CrashReportCategory crashreportsystemdetails = crashreport.addCategory("Chunk to be generated"); -- -- crashreportsystemdetails.setDetail("Status being generated", () -> { -- return BuiltInRegistries.CHUNK_STATUS.getKey(requiredStatus).toString(); -- }); -- crashreportsystemdetails.setDetail("Location", (Object) String.format(Locale.ROOT, "%d,%d", chunkcoordintpair.x, chunkcoordintpair.z)); -- crashreportsystemdetails.setDetail("Position hash", (Object) ChunkPos.asLong(chunkcoordintpair.x, chunkcoordintpair.z)); -- crashreportsystemdetails.setDetail("Generator", (Object) this.generator); -- this.mainThreadExecutor.execute(() -> { -- throw new ReportedException(crashreport); -- }); -- throw new ReportedException(crashreport); -- } -- } -- }, executor); -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - protected void releaseLightTicket(ChunkPos pos) { -@@ -880,7 +529,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - })); - } - -- private ChunkStatus getDependencyStatus(ChunkStatus centerChunkTargetStatus, int distance) { -+ public static ChunkStatus getDependencyStatus(ChunkStatus centerChunkTargetStatus, int distance) { // Paper -> public, static - ChunkStatus chunkstatus1; - - if (distance == 0) { -@@ -892,7 +541,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - return chunkstatus1; - } - -- private static void postLoadProtoChunk(ServerLevel world, List nbt) { -+ public static void postLoadProtoChunk(ServerLevel world, List nbt, ChunkPos position) { // Paper - public and add chunk position parameter - if (!nbt.isEmpty()) { - // CraftBukkit start - these are spawned serialized (DefinedStructure) and we don't call an add event below at the moment due to ordering complexities - world.addWorldGenChunkEntities(EntityType.loadEntitiesRecursive(nbt, world).filter((entity) -> { -@@ -908,45 +557,14 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - } - checkDupeUUID(world, entity); // Paper - duplicate uuid resolving - return !needsRemoval; -- })); -+ }), position); // Paper - rewrite chunk system - // CraftBukkit end - } - - } - - private CompletableFuture protoChunkToFullChunk(ChunkHolder playerchunk, ChunkAccess ichunkaccess) { -- return CompletableFuture.supplyAsync(() -> { -- ChunkPos chunkcoordintpair = playerchunk.getPos(); -- ProtoChunk protochunk = (ProtoChunk) ichunkaccess; -- LevelChunk chunk; -- -- if (protochunk instanceof ImposterProtoChunk) { -- chunk = ((ImposterProtoChunk) protochunk).getWrapped(); -- } else { -- chunk = new LevelChunk(this.level, protochunk, (chunk1) -> { -- ChunkMap.postLoadProtoChunk(this.level, protochunk.getEntities()); -- }); -- playerchunk.replaceProtoChunk(new ImposterProtoChunk(chunk, false)); -- } -- -- chunk.setFullStatus(() -> { -- return ChunkLevel.fullStatus(playerchunk.getTicketLevel()); -- }); -- chunk.runPostLoad(); -- if (this.entitiesInLevel.add(chunkcoordintpair.toLong())) { -- chunk.setLoaded(true); -- chunk.registerAllBlockEntitiesAfterLevelLoad(); -- chunk.registerTickContainerInLevel(this.level); -- } -- -- return chunk; -- }, (runnable) -> { -- ProcessorHandle mailbox = this.mainThreadMailbox; -- long i = playerchunk.getPos().toLong(); -- -- Objects.requireNonNull(playerchunk); -- mailbox.tell(ChunkTaskPriorityQueueSorter.message(runnable, i, playerchunk::getTicketLevel)); -- }); -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - // Paper start - duplicate uuid resolving -@@ -990,61 +608,16 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - // Paper end - duplicate uuid resolving - - public CompletableFuture> prepareTickingChunk(ChunkHolder holder) { -- CompletableFuture>> completablefuture = this.getChunkRangeFuture(holder, 1, (i) -> { -- return ChunkStatus.FULL; -- }); -- CompletableFuture> completablefuture1 = completablefuture.thenApplyAsync((chunkresult) -> { -- return chunkresult.map((list) -> { -- return (LevelChunk) list.get(list.size() / 2); -- }); -- }, (runnable) -> { -- this.mainThreadMailbox.tell(ChunkTaskPriorityQueueSorter.message(holder, runnable)); -- }).thenApplyAsync((chunkresult) -> { -- return chunkresult.ifSuccess((chunk) -> { -- chunk.postProcessGeneration(); -- this.level.startTickingChunk(chunk); -- CompletableFuture completablefuture2 = holder.getChunkSendSyncFuture(); -- -- if (completablefuture2.isDone()) { -- this.onChunkReadyToSend(chunk); -- } else { -- completablefuture2.thenAcceptAsync((object) -> { -- this.onChunkReadyToSend(chunk); -- }, this.mainThreadExecutor); -- } -- -- }); -- }, this.mainThreadExecutor); -- -- completablefuture1.handle((chunkresult, throwable) -> { -- this.tickingGenerated.getAndIncrement(); -- return null; -- }); -- return completablefuture1; -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - private void onChunkReadyToSend(LevelChunk chunk) { -- ChunkPos chunkcoordintpair = chunk.getPos(); -- Iterator iterator = this.playerMap.getAllPlayers().iterator(); -- -- while (iterator.hasNext()) { -- ServerPlayer entityplayer = (ServerPlayer) iterator.next(); -- -- if (entityplayer.getChunkTrackingView().contains(chunkcoordintpair)) { -- ChunkMap.markChunkPendingToSend(entityplayer, chunk); -- } -- } -+ throw new UnsupportedOperationException(); // Paper - rewrite player chunk loader - - } - - public CompletableFuture> prepareAccessibleChunk(ChunkHolder holder) { -- return this.getChunkRangeFuture(holder, 1, ChunkStatus::getStatusAroundFullChunk).thenApplyAsync((chunkresult) -> { -- return chunkresult.map((list) -> { -- return (LevelChunk) list.get(list.size() / 2); -- }); -- }, (runnable) -> { -- this.mainThreadMailbox.tell(ChunkTaskPriorityQueueSorter.message(holder, runnable)); -- }); -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - public int getTickingGenerated() { -@@ -1052,96 +625,15 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - } - - private boolean saveChunkIfNeeded(ChunkHolder chunkHolder) { -- if (!chunkHolder.wasAccessibleSinceLastSave()) { -- return false; -- } else { -- ChunkAccess ichunkaccess = (ChunkAccess) chunkHolder.getChunkToSave().getNow(null); // CraftBukkit - decompile error -- -- if (!(ichunkaccess instanceof ImposterProtoChunk) && !(ichunkaccess instanceof LevelChunk)) { -- return false; -- } else { -- long i = ichunkaccess.getPos().toLong(); -- long j = this.chunkSaveCooldowns.getOrDefault(i, -1L); -- long k = System.currentTimeMillis(); -- -- if (k < j) { -- return false; -- } else { -- boolean flag = this.save(ichunkaccess); -- -- chunkHolder.refreshAccessibility(); -- if (flag) { -- this.chunkSaveCooldowns.put(i, k + 10000L); -- } -- -- return flag; -- } -- } -- } -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - public boolean save(ChunkAccess chunk) { -- this.poiManager.flush(chunk.getPos()); -- if (!chunk.isUnsaved()) { -- return false; -- } else { -- chunk.setUnsaved(false); -- ChunkPos chunkcoordintpair = chunk.getPos(); -- -- try { -- ChunkStatus chunkstatus = chunk.getStatus(); -- -- if (chunkstatus.getChunkType() != ChunkType.LEVELCHUNK) { -- if (this.isExistingChunkFull(chunkcoordintpair)) { -- return false; -- } -- -- if (chunkstatus == ChunkStatus.EMPTY && chunk.getAllStarts().values().stream().noneMatch(StructureStart::isValid)) { -- return false; -- } -- } -- -- this.level.getProfiler().incrementCounter("chunkSave"); -- CompoundTag nbttagcompound = ChunkSerializer.write(this.level, chunk); -- -- this.write(chunkcoordintpair, nbttagcompound).exceptionallyAsync((throwable) -> { -- this.level.getServer().reportChunkSaveFailure(chunkcoordintpair); -- return null; -- }, this.mainThreadExecutor); -- this.markPosition(chunkcoordintpair, chunkstatus.getChunkType()); -- return true; -- } catch (Exception exception) { -- ChunkMap.LOGGER.error("Failed to save chunk {},{}", new Object[]{chunkcoordintpair.x, chunkcoordintpair.z, exception}); -- this.level.getServer().reportChunkSaveFailure(chunkcoordintpair); -- return false; -- } -- } -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - private boolean isExistingChunkFull(ChunkPos pos) { -- byte b0 = this.chunkTypeCache.get(pos.toLong()); -- -- if (b0 != 0) { -- return b0 == 1; -- } else { -- CompoundTag nbttagcompound; -- -- try { -- nbttagcompound = (CompoundTag) ((Optional) this.readChunk(pos).join()).orElse((Object) null); -- if (nbttagcompound == null) { -- this.markPositionReplaceable(pos); -- return false; -- } -- } catch (Exception exception) { -- ChunkMap.LOGGER.error("Failed to read chunk {}", pos, exception); -- this.markPositionReplaceable(pos); -- return false; -- } -- -- ChunkType chunktype = ChunkSerializer.getChunkTypeFromTag(nbttagcompound); -- -- return this.markPosition(pos, chunktype) == 1; -- } -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - public void setServerViewDistance(int watchDistance) { // Paper - public -@@ -1149,37 +641,36 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - - if (j != this.serverViewDistance) { - this.serverViewDistance = j; -- this.distanceManager.updatePlayerTickets(this.serverViewDistance); -- Iterator iterator = this.playerMap.getAllPlayers().iterator(); -+ this.level.playerChunkLoader.setLoadDistance(this.serverViewDistance + 1); // Paper - replace player loader system -+ } - -- while (iterator.hasNext()) { -- ServerPlayer entityplayer = (ServerPlayer) iterator.next(); -+ } - -- this.updateChunkTracking(entityplayer); -- } -- } -+ // Paper start - replace player loader system -+ public void setTickViewDistance(int distance) { -+ this.level.playerChunkLoader.setTickDistance(distance); -+ } - -+ public void setSendViewDistance(int distance) { -+ this.level.playerChunkLoader.setSendDistance(distance); - } -+ // Paper end - replace player loader system - - public int getPlayerViewDistance(ServerPlayer player) { // Paper - public -- return Mth.clamp(player.requestedViewDistance(), 2, this.serverViewDistance); -+ return io.papermc.paper.chunk.system.ChunkSystem.getSendViewDistance(player); // Paper - per player view distance - } - - private void markChunkPendingToSend(ServerPlayer player, ChunkPos pos) { -- LevelChunk chunk = this.getChunkToSend(pos.toLong()); -- -- if (chunk != null) { -- ChunkMap.markChunkPendingToSend(player, chunk); -- } -+ throw new UnsupportedOperationException(); // Paper - per player view distance - - } - - private static void markChunkPendingToSend(ServerPlayer player, LevelChunk chunk) { -- player.connection.chunkSender.markChunkPendingToSend(chunk); -+ throw new UnsupportedOperationException(); // Paper - rewrite player chunk loader - } - - private static void dropChunk(ServerPlayer player, ChunkPos pos) { -- player.connection.chunkSender.dropChunk(player, pos); -+ // Paper - rewrite player chunk loader - } - - @Nullable -@@ -1202,30 +693,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - } - - void dumpChunks(Writer writer) throws IOException { -- CsvOutput csvwriter = CsvOutput.builder().addColumn("x").addColumn("z").addColumn("level").addColumn("in_memory").addColumn("status").addColumn("full_status").addColumn("accessible_ready").addColumn("ticking_ready").addColumn("entity_ticking_ready").addColumn("ticket").addColumn("spawning").addColumn("block_entity_count").addColumn("ticking_ticket").addColumn("ticking_level").addColumn("block_ticks").addColumn("fluid_ticks").build(writer); -- TickingTracker tickingtracker = this.distanceManager.tickingTracker(); -- Iterator objectbidirectionaliterator = io.papermc.paper.chunk.system.ChunkSystem.getVisibleChunkHolders(this.level).iterator(); // Paper -- -- while (objectbidirectionaliterator.hasNext()) { -- ChunkHolder playerchunk = objectbidirectionaliterator.next(); // Paper -- long i = playerchunk.pos.toLong(); // Paper -- ChunkPos chunkcoordintpair = new ChunkPos(i); -- // Paper -- Optional optional = Optional.ofNullable(playerchunk.getLastAvailable()); -- Optional optional1 = optional.flatMap((ichunkaccess) -> { -- return ichunkaccess instanceof LevelChunk ? Optional.of((LevelChunk) ichunkaccess) : Optional.empty(); -- }); -- -- // CraftBukkit - decompile error -- csvwriter.writeRow(chunkcoordintpair.x, chunkcoordintpair.z, playerchunk.getTicketLevel(), optional.isPresent(), optional.map(ChunkAccess::getStatus).orElse(null), optional1.map(LevelChunk::getFullStatus).orElse(null), ChunkMap.printFuture(playerchunk.getFullChunkFuture()), ChunkMap.printFuture(playerchunk.getTickingChunkFuture()), ChunkMap.printFuture(playerchunk.getEntityTickingChunkFuture()), this.distanceManager.getTicketDebugString(i), this.anyPlayerCloseEnoughForSpawning(chunkcoordintpair), optional1.map((chunk) -> { -- return chunk.getBlockEntities().size(); -- }).orElse(0), tickingtracker.getTicketDebugString(i), tickingtracker.getLevel(i), optional1.map((chunk) -> { -- return chunk.getBlockTicks().count(); -- }).orElse(0), optional1.map((chunk) -> { -- return chunk.getFluidTicks().count(); -- }).orElse(0)); -- } -- -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - private static String printFuture(CompletableFuture> future) { -@@ -1240,6 +708,32 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - } - } - -+ // Paper start - Asynchronous chunk io -+ @Nullable -+ @Override -+ public CompoundTag readSync(ChunkPos chunkcoordintpair) throws IOException { -+ if (!io.papermc.paper.chunk.system.io.RegionFileIOThread.isRegionFileThread()) { -+ return io.papermc.paper.chunk.system.io.RegionFileIOThread.loadData( -+ this.level, chunkcoordintpair.x, chunkcoordintpair.z, io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.CHUNK_DATA, -+ io.papermc.paper.chunk.system.io.RegionFileIOThread.getIOBlockingPriorityForCurrentThread() -+ ); -+ } -+ return super.readSync(chunkcoordintpair); -+ } -+ -+ @Override -+ public CompletableFuture write(ChunkPos chunkcoordintpair, CompoundTag nbttagcompound) throws IOException { -+ if (!io.papermc.paper.chunk.system.io.RegionFileIOThread.isRegionFileThread()) { -+ io.papermc.paper.chunk.system.io.RegionFileIOThread.scheduleSave( -+ this.level, chunkcoordintpair.x, chunkcoordintpair.z, nbttagcompound, -+ io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.CHUNK_DATA); -+ return null; -+ } -+ super.write(chunkcoordintpair, nbttagcompound); -+ return null; -+ } -+ // Paper end -+ - private CompletableFuture> readChunk(ChunkPos chunkPos) { - return this.read(chunkPos).thenApplyAsync((optional) -> { - return optional.map((nbttagcompound) -> this.upgradeChunkTag(nbttagcompound, chunkPos)); // CraftBukkit -@@ -1340,8 +834,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - this.distanceManager.addPlayer(SectionPos.of((EntityAccess) player), player); - } - -- player.setChunkTrackingView(ChunkTrackingView.EMPTY); -- this.updateChunkTracking(player); -+ // Paper - handled by player chunk loader - this.addPlayerToDistanceMaps(player); // Paper - distance maps - } else { - SectionPos sectionposition = player.getLastSectionPos(); -@@ -1352,7 +845,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - } - - this.removePlayerFromDistanceMaps(player); // Paper - distance maps -- this.applyChunkTrackingView(player, ChunkTrackingView.EMPTY); -+ // Paper - handled by player chunk loader - } - - } -@@ -1400,71 +893,30 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - this.playerMap.unIgnorePlayer(player); - } - -- this.updateChunkTracking(player); -+ // Paper - replaced by PlayerChunkLoader - } - - this.updateMaps(player); // Paper - distance maps - } - - private void updateChunkTracking(ServerPlayer player) { -- ChunkPos chunkcoordintpair = player.chunkPosition(); -- int i = this.getPlayerViewDistance(player); -- ChunkTrackingView chunktrackingview = player.getChunkTrackingView(); -- -- if (chunktrackingview instanceof ChunkTrackingView.Positioned chunktrackingview_a) { -- if (chunktrackingview_a.center().equals(chunkcoordintpair) && chunktrackingview_a.viewDistance() == i) { -- return; -- } -- } -- -- this.applyChunkTrackingView(player, ChunkTrackingView.of(chunkcoordintpair, i)); -+ throw new UnsupportedOperationException(); // Paper - replaced by PlayerChunkLoader - } - - private void applyChunkTrackingView(ServerPlayer player, ChunkTrackingView chunkFilter) { -- if (player.level() == this.level) { -- ChunkTrackingView chunktrackingview1 = player.getChunkTrackingView(); -- -- if (chunkFilter instanceof ChunkTrackingView.Positioned) { -- label15: -- { -- ChunkTrackingView.Positioned chunktrackingview_a = (ChunkTrackingView.Positioned) chunkFilter; -- -- if (chunktrackingview1 instanceof ChunkTrackingView.Positioned) { -- ChunkTrackingView.Positioned chunktrackingview_a1 = (ChunkTrackingView.Positioned) chunktrackingview1; -- -- if (chunktrackingview_a1.center().equals(chunktrackingview_a.center())) { -- break label15; -- } -- } -- -- player.connection.send(new ClientboundSetChunkCacheCenterPacket(chunktrackingview_a.center().x, chunktrackingview_a.center().z)); -- } -- } -- -- ChunkTrackingView.difference(chunktrackingview1, chunkFilter, (chunkcoordintpair) -> { -- this.markChunkPendingToSend(player, chunkcoordintpair); -- }, (chunkcoordintpair) -> { -- ChunkMap.dropChunk(player, chunkcoordintpair); -- }); -- player.setChunkTrackingView(chunkFilter); -- } -+ throw new UnsupportedOperationException(); // Paper - replaced by PlayerChunkLoader - } - - @Override - public List getPlayers(ChunkPos chunkPos, boolean onlyOnWatchDistanceEdge) { -- Set set = this.playerMap.getAllPlayers(); -- Builder builder = ImmutableList.builder(); -- Iterator iterator = set.iterator(); -- -- while (iterator.hasNext()) { -- ServerPlayer entityplayer = (ServerPlayer) iterator.next(); -- -- if (onlyOnWatchDistanceEdge && this.isChunkOnTrackedBorder(entityplayer, chunkPos.x, chunkPos.z) || !onlyOnWatchDistanceEdge && this.isChunkTracked(entityplayer, chunkPos.x, chunkPos.z)) { -- builder.add(entityplayer); -- } -+ // Paper start - per player view distance -+ ChunkHolder holder = this.getVisibleChunkIfPresent(chunkPos.toLong()); -+ if (holder == null) { -+ return new java.util.ArrayList<>(); -+ } else { -+ return holder.getPlayers(onlyOnWatchDistanceEdge); - } -- -- return builder.build(); -+ // Paper end - per player view distance - } - - public void addEntity(Entity entity) { -@@ -1535,13 +987,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - } - - protected void tick() { -- Iterator iterator = this.playerMap.getAllPlayers().iterator(); -- -- while (iterator.hasNext()) { -- ServerPlayer entityplayer = (ServerPlayer) iterator.next(); -- -- this.updateChunkTracking(entityplayer); -- } -+ // Paper - replaced by PlayerChunkLoader - - List list = Lists.newArrayList(); - List list1 = this.level.players(); -@@ -1648,16 +1094,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - } - - public void waitForLightBeforeSending(ChunkPos centerPos, int radius) { -- int j = radius + 1; -- -- ChunkPos.rangeClosed(centerPos, j).forEach((chunkcoordintpair1) -> { -- ChunkHolder playerchunk = this.getVisibleChunkIfPresent(chunkcoordintpair1.toLong()); -- -- if (playerchunk != null) { -- playerchunk.addSendDependency(this.lightEngine.waitForPendingTasks(chunkcoordintpair1.x, chunkcoordintpair1.z)); -- } -- -- }); -+ // Paper - rewrite player chunk loader - } - - public class ChunkDistanceManager extends DistanceManager { // Paper - public -@@ -1668,7 +1105,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider - - @Override - protected boolean isChunkToRemove(long pos) { -- return ChunkMap.this.toDrop.contains(pos); -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - @Nullable -diff --git a/src/main/java/net/minecraft/server/level/DistanceManager.java b/src/main/java/net/minecraft/server/level/DistanceManager.java -index 7a48ae2ba962ff56d0abff581b51f28b48bd9aae..ed5154e41ca858f4d6b4d1c276c66831c038d2a6 100644 ---- a/src/main/java/net/minecraft/server/level/DistanceManager.java -+++ b/src/main/java/net/minecraft/server/level/DistanceManager.java -@@ -38,65 +38,28 @@ import org.slf4j.Logger; - - public abstract class DistanceManager { - -+ // Paper start - rewrite chunk system -+ public io.papermc.paper.chunk.system.scheduling.ChunkHolderManager getChunkHolderManager() { -+ return this.chunkMap.level.chunkTaskScheduler.chunkHolderManager; -+ } -+ // Paper end - rewrite chunk system -+ - static final Logger LOGGER = LogUtils.getLogger(); - static final int PLAYER_TICKET_LEVEL = ChunkLevel.byStatus(FullChunkStatus.ENTITY_TICKING); - private static final int INITIAL_TICKET_LIST_CAPACITY = 4; - final Long2ObjectMap> playersPerChunk = new Long2ObjectOpenHashMap(); -- public final Long2ObjectOpenHashMap>> tickets = new Long2ObjectOpenHashMap(); -- private final DistanceManager.ChunkTicketTracker ticketTracker = new DistanceManager.ChunkTicketTracker(); -+ // Paper - rewrite chunk system - private final DistanceManager.FixedPlayerDistanceChunkTracker naturalSpawnChunkCounter = new DistanceManager.FixedPlayerDistanceChunkTracker(8); -- private final TickingTracker tickingTicketsTracker = new TickingTracker(); -- private final DistanceManager.PlayerTicketTracker playerTicketManager = new DistanceManager.PlayerTicketTracker(32); -- final Set chunksToUpdateFutures = Sets.newHashSet(); -- final ChunkTaskPriorityQueueSorter ticketThrottler; -- final ProcessorHandle> ticketThrottlerInput; -- final ProcessorHandle ticketThrottlerReleaser; -- final LongSet ticketsToRelease = new LongOpenHashSet(); -- final Executor mainThreadExecutor; -- private long ticketTickCounter; -- public int simulationDistance = 10; -+ // Paper - rewrite chunk system - private final ChunkMap chunkMap; // Paper - - protected DistanceManager(Executor workerExecutor, Executor mainThreadExecutor, ChunkMap chunkMap) { -- Objects.requireNonNull(mainThreadExecutor); -- ProcessorHandle mailbox = ProcessorHandle.of("player ticket throttler", mainThreadExecutor::execute); -- ChunkTaskPriorityQueueSorter chunktaskqueuesorter = new ChunkTaskPriorityQueueSorter(ImmutableList.of(mailbox), workerExecutor, 4); -- -- this.ticketThrottler = chunktaskqueuesorter; -- this.ticketThrottlerInput = chunktaskqueuesorter.getProcessor(mailbox, true); -- this.ticketThrottlerReleaser = chunktaskqueuesorter.getReleaseProcessor(mailbox); -- this.mainThreadExecutor = mainThreadExecutor; -+ // Paper - rewrite chunk system - this.chunkMap = chunkMap; // Paper - } - - protected void purgeStaleTickets() { -- ++this.ticketTickCounter; -- ObjectIterator>>> objectiterator = this.tickets.long2ObjectEntrySet().fastIterator(); -- -- while (objectiterator.hasNext()) { -- Entry>> entry = (Entry) objectiterator.next(); -- Iterator> iterator = ((SortedArraySet) entry.getValue()).iterator(); -- boolean flag = false; -- -- while (iterator.hasNext()) { -- Ticket ticket = (Ticket) iterator.next(); -- -- if (ticket.timedOut(this.ticketTickCounter)) { -- iterator.remove(); -- flag = true; -- this.tickingTicketsTracker.removeTicket(entry.getLongKey(), ticket); -- } -- } -- -- if (flag) { -- this.ticketTracker.update(entry.getLongKey(), DistanceManager.getTicketLevelAt((SortedArraySet) entry.getValue()), false); -- } -- -- if (((SortedArraySet) entry.getValue()).isEmpty()) { -- objectiterator.remove(); -- } -- } -- -+ this.getChunkHolderManager().tick(); // Paper - rewrite chunk system - } - - private static int getTicketLevelAt(SortedArraySet> tickets) { -@@ -112,108 +75,25 @@ public abstract class DistanceManager { - protected abstract ChunkHolder updateChunkScheduling(long pos, int level, @Nullable ChunkHolder holder, int k); - - public boolean runAllUpdates(ChunkMap chunkStorage) { -- this.naturalSpawnChunkCounter.runAllUpdates(); -- this.tickingTicketsTracker.runAllUpdates(); -- this.playerTicketManager.runAllUpdates(); -- int i = Integer.MAX_VALUE - this.ticketTracker.runDistanceUpdates(Integer.MAX_VALUE); -- boolean flag = i != 0; -- -- if (flag) { -- ; -- } -- -- if (!this.chunksToUpdateFutures.isEmpty()) { -- // CraftBukkit start -- // Iterate pending chunk updates with protection against concurrent modification exceptions -- java.util.Iterator iter = this.chunksToUpdateFutures.iterator(); -- int expectedSize = this.chunksToUpdateFutures.size(); -- do { -- ChunkHolder playerchunk = iter.next(); -- iter.remove(); -- expectedSize--; -- -- playerchunk.updateFutures(chunkStorage, this.mainThreadExecutor); -- -- // Reset iterator if set was modified using add() -- if (this.chunksToUpdateFutures.size() != expectedSize) { -- expectedSize = this.chunksToUpdateFutures.size(); -- iter = this.chunksToUpdateFutures.iterator(); -- } -- } while (iter.hasNext()); -- // CraftBukkit end -- -- return true; -- } else { -- if (!this.ticketsToRelease.isEmpty()) { -- LongIterator longiterator = this.ticketsToRelease.iterator(); -- -- while (longiterator.hasNext()) { -- long j = longiterator.nextLong(); -- -- if (this.getTickets(j).stream().anyMatch((ticket) -> { -- return ticket.getType() == TicketType.PLAYER; -- })) { -- ChunkHolder playerchunk = chunkStorage.getUpdatingChunkIfPresent(j); -- -- if (playerchunk == null) { -- throw new IllegalStateException(); -- } -- -- CompletableFuture> completablefuture = playerchunk.getEntityTickingChunkFuture(); -- -- completablefuture.thenAccept((chunkresult) -> { -- this.mainThreadExecutor.execute(() -> { -- this.ticketThrottlerReleaser.tell(ChunkTaskPriorityQueueSorter.release(() -> { -- }, j, false)); -- }); -- }); -- } -- } -- -- this.ticketsToRelease.clear(); -- } -- -- return flag; -- } -+ return this.getChunkHolderManager().processTicketUpdates(); // Paper - rewrite chunk system - } - - boolean addTicket(long i, Ticket ticket) { // CraftBukkit - void -> boolean -- SortedArraySet> arraysetsorted = this.getTickets(i); -- int j = DistanceManager.getTicketLevelAt(arraysetsorted); -- Ticket ticket1 = (Ticket) arraysetsorted.addOrGet(ticket); -- -- ticket1.setCreatedTick(this.ticketTickCounter); -- if (ticket.getTicketLevel() < j) { -- this.ticketTracker.update(i, ticket.getTicketLevel(), true); -- } -- -- return ticket == ticket1; // CraftBukkit -+ org.spigotmc.AsyncCatcher.catchOp("ChunkMapDistance::addTicket"); // Paper -+ return this.getChunkHolderManager().addTicketAtLevel((TicketType)ticket.getType(), i, ticket.getTicketLevel(), ticket.key); // Paper - rewrite chunk system - } - - boolean removeTicket(long i, Ticket ticket) { // CraftBukkit - void -> boolean -- SortedArraySet> arraysetsorted = this.getTickets(i); -- -- boolean removed = false; // CraftBukkit -- if (arraysetsorted.remove(ticket)) { -- removed = true; // CraftBukkit -- } -- -- if (arraysetsorted.isEmpty()) { -- this.tickets.remove(i); -- } -- -- this.ticketTracker.update(i, DistanceManager.getTicketLevelAt(arraysetsorted), false); -- return removed; // CraftBukkit -+ org.spigotmc.AsyncCatcher.catchOp("ChunkMapDistance::removeTicket"); // Paper -+ return this.getChunkHolderManager().removeTicketAtLevel((TicketType)ticket.getType(), i, ticket.getTicketLevel(), ticket.key); // Paper - rewrite chunk system - } - - public void addTicket(TicketType type, ChunkPos pos, int level, T argument) { -- this.addTicket(pos.toLong(), new Ticket<>(type, level, argument)); -+ this.getChunkHolderManager().addTicketAtLevel(type, pos, level, argument); // Paper - rewrite chunk system - } - - public void removeTicket(TicketType type, ChunkPos pos, int level, T argument) { -- Ticket ticket = new Ticket<>(type, level, argument); -- -- this.removeTicket(pos.toLong(), ticket); -+ this.getChunkHolderManager().removeTicketAtLevel(type, pos, level, argument); // Paper - rewrite chunk system - } - - public void addRegionTicket(TicketType type, ChunkPos pos, int radius, T argument) { -@@ -222,13 +102,7 @@ public abstract class DistanceManager { - } - - public boolean addRegionTicketAtDistance(TicketType tickettype, ChunkPos chunkcoordintpair, int i, T t0) { -- // CraftBukkit end -- Ticket ticket = new Ticket<>(tickettype, ChunkLevel.byStatus(FullChunkStatus.FULL) - i, t0); -- long j = chunkcoordintpair.toLong(); -- -- boolean added = this.addTicket(j, ticket); // CraftBukkit -- this.tickingTicketsTracker.addTicket(j, ticket); -- return added; // CraftBukkit -+ return this.getChunkHolderManager().addTicketAtLevel(tickettype, chunkcoordintpair, ChunkLevel.byStatus(FullChunkStatus.FULL) - i, t0); // Paper - rewrite chunk system - } - - public void removeRegionTicket(TicketType type, ChunkPos pos, int radius, T argument) { -@@ -237,31 +111,21 @@ public abstract class DistanceManager { - } - - public boolean removeRegionTicketAtDistance(TicketType tickettype, ChunkPos chunkcoordintpair, int i, T t0) { -- // CraftBukkit end -- Ticket ticket = new Ticket<>(tickettype, ChunkLevel.byStatus(FullChunkStatus.FULL) - i, t0); -- long j = chunkcoordintpair.toLong(); -- -- boolean removed = this.removeTicket(j, ticket); // CraftBukkit -- this.tickingTicketsTracker.removeTicket(j, ticket); -- return removed; // CraftBukkit -+ return this.getChunkHolderManager().removeTicketAtLevel(tickettype, chunkcoordintpair, ChunkLevel.byStatus(FullChunkStatus.FULL) - i, t0); // Paper - rewrite chunk system - } - -- private SortedArraySet> getTickets(long position) { -- return (SortedArraySet) this.tickets.computeIfAbsent(position, (j) -> { -- return SortedArraySet.create(4); -- }); -- } -+ // Paper - rewrite chunk system - - protected void updateChunkForced(ChunkPos pos, boolean forced) { -- Ticket ticket = new Ticket<>(TicketType.FORCED, ChunkMap.FORCED_TICKET_LEVEL, pos); -+ Ticket ticket = new Ticket<>(TicketType.FORCED, ChunkMap.FORCED_TICKET_LEVEL, pos, 0L); // Paper - rewrite chunk system - long i = pos.toLong(); - - if (forced) { - this.addTicket(i, ticket); -- this.tickingTicketsTracker.addTicket(i, ticket); -+ //this.tickingTicketsTracker.addTicket(i, ticket); // Paper - no longer used - } else { - this.removeTicket(i, ticket); -- this.tickingTicketsTracker.removeTicket(i, ticket); -+ //this.tickingTicketsTracker.removeTicket(i, ticket); // Paper - no longer used - } - - } -@@ -270,12 +134,10 @@ public abstract class DistanceManager { - ChunkPos chunkcoordintpair = pos.chunk(); - long i = chunkcoordintpair.toLong(); - -- ((ObjectSet) this.playersPerChunk.computeIfAbsent(i, (j) -> { -- return new ObjectOpenHashSet(); -- })).add(player); -+ // Paper - no longer used - this.naturalSpawnChunkCounter.update(i, 0, true); -- this.playerTicketManager.update(i, 0, true); -- this.tickingTicketsTracker.addTicket(TicketType.PLAYER, chunkcoordintpair, this.getPlayerTicketLevel(), chunkcoordintpair); -+ //this.playerTicketManager.update(i, 0, true); // Paper - no longer used -+ //this.tickingTicketsTracker.addTicket(TicketType.PLAYER, chunkcoordintpair, this.getPlayerTicketLevel(), chunkcoordintpair); // Paper - no longer used - } - - public void removePlayer(SectionPos pos, ServerPlayer player) { -@@ -288,40 +150,44 @@ public abstract class DistanceManager { - if (objectset == null || objectset.isEmpty()) { // Paper - this.playersPerChunk.remove(i); - this.naturalSpawnChunkCounter.update(i, Integer.MAX_VALUE, false); -- this.playerTicketManager.update(i, Integer.MAX_VALUE, false); -- this.tickingTicketsTracker.removeTicket(TicketType.PLAYER, chunkcoordintpair, this.getPlayerTicketLevel(), chunkcoordintpair); -+ //this.playerTicketManager.update(i, Integer.MAX_VALUE, false); // Paper - no longer used -+ //this.tickingTicketsTracker.removeTicket(TicketType.PLAYER, chunkcoordintpair, this.getPlayerTicketLevel(), chunkcoordintpair); // Paper - no longer used - } - - } - -- private int getPlayerTicketLevel() { -- return Math.max(0, ChunkLevel.byStatus(FullChunkStatus.ENTITY_TICKING) - this.simulationDistance); -- } -+ // Paper - rewrite chunk system - - public boolean inEntityTickingRange(long chunkPos) { -- return ChunkLevel.isEntityTicking(this.tickingTicketsTracker.getLevel(chunkPos)); -+ // Paper start - replace player chunk loader system -+ ChunkHolder holder = this.chunkMap.getVisibleChunkIfPresent(chunkPos); -+ return holder != null && holder.isEntityTickingReady(); -+ // Paper end - replace player chunk loader system - } - - public boolean inBlockTickingRange(long chunkPos) { -- return ChunkLevel.isBlockTicking(this.tickingTicketsTracker.getLevel(chunkPos)); -+ // Paper start - replace player chunk loader system -+ ChunkHolder holder = this.chunkMap.getVisibleChunkIfPresent(chunkPos); -+ return holder != null && holder.isTickingReady(); -+ // Paper end - replace player chunk loader system - } - - protected String getTicketDebugString(long pos) { -- SortedArraySet> arraysetsorted = (SortedArraySet) this.tickets.get(pos); -- -- return arraysetsorted != null && !arraysetsorted.isEmpty() ? ((Ticket) arraysetsorted.first()).toString() : "no_ticket"; -+ return this.getChunkHolderManager().getTicketDebugString(pos); // Paper - rewrite chunk system - } - - protected void updatePlayerTickets(int viewDistance) { -- this.playerTicketManager.updateViewDistance(viewDistance); -+ this.chunkMap.setServerViewDistance(viewDistance); // Paper - route to player chunk manager - } - -- public void updateSimulationDistance(int simulationDistance) { -- if (simulationDistance != this.simulationDistance) { -- this.simulationDistance = simulationDistance; -- this.tickingTicketsTracker.replacePlayerTicketsLevel(this.getPlayerTicketLevel()); -- } -+ // Paper start -+ public int getSimulationDistance() { -+ return this.chunkMap.level.playerChunkLoader.getAPITickDistance(); -+ } -+ // Paper end - -+ public void updateSimulationDistance(int simulationDistance) { -+ this.chunkMap.level.playerChunkLoader.setTickDistance(simulationDistance); // Paper - route to player chunk manager - } - - public int getNaturalSpawnChunkCount() { -@@ -335,103 +201,26 @@ public abstract class DistanceManager { - } - - public String getDebugStatus() { -- return this.ticketThrottler.getDebugStatus(); -+ return "No DistanceManager stats available"; // Paper - rewrite chunk system - } - -- private void dumpTickets(String path) { -- try { -- FileOutputStream fileoutputstream = new FileOutputStream(new File(path)); -- -- try { -- ObjectIterator objectiterator = this.tickets.long2ObjectEntrySet().iterator(); -- -- while (objectiterator.hasNext()) { -- Entry>> entry = (Entry) objectiterator.next(); -- ChunkPos chunkcoordintpair = new ChunkPos(entry.getLongKey()); -- Iterator iterator = ((SortedArraySet) entry.getValue()).iterator(); -- -- while (iterator.hasNext()) { -- Ticket ticket = (Ticket) iterator.next(); -- -- fileoutputstream.write((chunkcoordintpair.x + "\t" + chunkcoordintpair.z + "\t" + String.valueOf(ticket.getType()) + "\t" + ticket.getTicketLevel() + "\t\n").getBytes(StandardCharsets.UTF_8)); -- } -- } -- } catch (Throwable throwable) { -- try { -- fileoutputstream.close(); -- } catch (Throwable throwable1) { -- throwable.addSuppressed(throwable1); -- } -- -- throw throwable; -- } -- -- fileoutputstream.close(); -- } catch (IOException ioexception) { -- DistanceManager.LOGGER.error("Failed to dump tickets to {}", path, ioexception); -- } -- -- } -- -- @VisibleForTesting -- TickingTracker tickingTracker() { -- return this.tickingTicketsTracker; -- } -+ // Paper - rewrite chunk system - - public void removeTicketsOnClosing() { -- ImmutableSet> immutableset = ImmutableSet.of(TicketType.UNKNOWN, TicketType.POST_TELEPORT, TicketType.LIGHT, TicketType.FUTURE_AWAIT, TicketType.CHUNK_RELIGHT, ca.spottedleaf.starlight.common.light.StarLightInterface.CHUNK_WORK_TICKET); // Paper - add additional tickets to preserve -- ObjectIterator>>> objectiterator = this.tickets.long2ObjectEntrySet().fastIterator(); -- -- while (objectiterator.hasNext()) { -- Entry>> entry = (Entry) objectiterator.next(); -- Iterator> iterator = ((SortedArraySet) entry.getValue()).iterator(); -- boolean flag = false; -- -- while (iterator.hasNext()) { -- Ticket ticket = (Ticket) iterator.next(); -- -- if (!immutableset.contains(ticket.getType())) { -- iterator.remove(); -- flag = true; -- this.tickingTicketsTracker.removeTicket(entry.getLongKey(), ticket); -- } -- } -- -- if (flag) { -- this.ticketTracker.update(entry.getLongKey(), DistanceManager.getTicketLevelAt((SortedArraySet) entry.getValue()), false); -- } -- -- if (((SortedArraySet) entry.getValue()).isEmpty()) { -- objectiterator.remove(); -- } -- } -- -+ // Paper - rewrite chunk system - this stupid hack ain't needed anymore - } - - public boolean hasTickets() { -- return !this.tickets.isEmpty(); -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - // CraftBukkit start - public void removeAllTicketsFor(TicketType ticketType, int ticketLevel, T ticketIdentifier) { -- Ticket target = new Ticket<>(ticketType, ticketLevel, ticketIdentifier); -- -- for (java.util.Iterator>>> iterator = this.tickets.long2ObjectEntrySet().fastIterator(); iterator.hasNext();) { -- Entry>> entry = iterator.next(); -- SortedArraySet> tickets = entry.getValue(); -- if (tickets.remove(target)) { -- // copied from removeTicket -- this.ticketTracker.update(entry.getLongKey(), DistanceManager.getTicketLevelAt(tickets), false); -- -- // can't use entry after it's removed -- if (tickets.isEmpty()) { -- iterator.remove(); -- } -- } -- } -+ this.getChunkHolderManager().removeAllTicketsFor(ticketType, ticketLevel, ticketIdentifier); // Paper - rewrite chunk system - } - // CraftBukkit end - -+ /* Paper - rewrite chunk system - private class ChunkTicketTracker extends ChunkTracker { - - private static final int MAX_LEVEL = ChunkLevel.MAX_LEVEL + 1; -@@ -478,6 +267,7 @@ public abstract class DistanceManager { - return this.runUpdates(distance); - } - } -+ */ // Paper - rewrite chunk system - - private class FixedPlayerDistanceChunkTracker extends ChunkTracker { - -@@ -557,6 +347,7 @@ public abstract class DistanceManager { - } - } - -+ /* Paper - rewrite chunk system - private class PlayerTicketTracker extends DistanceManager.FixedPlayerDistanceChunkTracker { - - private int viewDistance = 0; -@@ -652,4 +443,5 @@ public abstract class DistanceManager { - return distance <= this.viewDistance; - } - } -+ */ // Paper - rewrite chunk system - } -diff --git a/src/main/java/net/minecraft/server/level/ServerChunkCache.java b/src/main/java/net/minecraft/server/level/ServerChunkCache.java -index 0e89cf0742b9443f5256081987242554de24d893..802e9d266c01eaf8a83e78fe8dbe881e22e8b4d6 100644 ---- a/src/main/java/net/minecraft/server/level/ServerChunkCache.java -+++ b/src/main/java/net/minecraft/server/level/ServerChunkCache.java -@@ -71,7 +71,7 @@ public class ServerChunkCache extends ChunkSource { - public final io.papermc.paper.util.maplist.IteratorSafeOrderedReferenceSet entityTickingChunks = new io.papermc.paper.util.maplist.IteratorSafeOrderedReferenceSet<>(4096, 0.75f, 4096, 0.15, true); - final com.destroystokyo.paper.util.concurrent.WeakSeqLock loadedChunkMapSeqLock = new com.destroystokyo.paper.util.concurrent.WeakSeqLock(); - final it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap loadedChunkMap = new it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap<>(8192, 0.5f); -- long chunkFutureAwaitCounter; -+ final java.util.concurrent.atomic.AtomicLong chunkFutureAwaitCounter = new java.util.concurrent.atomic.AtomicLong(); // Paper - chunk system rewrite - private final LevelChunk[] lastLoadedChunks = new LevelChunk[4 * 4]; - // Paper end - -@@ -195,7 +195,7 @@ public class ServerChunkCache extends ChunkSource { - public LevelChunk getChunkAtIfLoadedImmediately(int x, int z) { - long k = ChunkPos.asLong(x, z); - -- if (Thread.currentThread() == this.mainThread) { -+ if (io.papermc.paper.util.TickThread.isTickThread()) { // Paper - rewrite chunk system - return this.getChunkAtIfLoadedMainThread(x, z); - } - -@@ -247,7 +247,8 @@ public class ServerChunkCache extends ChunkSource { - @Nullable - @Override - public ChunkAccess getChunk(int x, int z, ChunkStatus leastStatus, boolean create) { -- if (Thread.currentThread() != this.mainThread) { -+ final int x1 = x; final int z1 = z; // Paper - conflict on variable change -+ if (!io.papermc.paper.util.TickThread.isTickThread()) { // Paper - rewrite chunk system - return (ChunkAccess) CompletableFuture.supplyAsync(() -> { - return this.getChunk(x, z, leastStatus, create); - }, this.mainThreadProcessor).join(); -@@ -263,15 +264,7 @@ public class ServerChunkCache extends ChunkSource { - gameprofilerfiller.incrementCounter("getChunk"); - long k = ChunkPos.asLong(x, z); - -- for (int l = 0; l < 4; ++l) { -- if (k == this.lastChunkPos[l] && leastStatus == this.lastChunkStatus[l]) { -- ChunkAccess ichunkaccess = this.lastChunk[l]; -- -- if (ichunkaccess != null) { // CraftBukkit - the chunk can become accessible in the meantime TODO for non-null chunks it might also make sense to check that the chunk's state hasn't changed in the meantime -- return ichunkaccess; -- } -- } -- } -+ // Paper - rewrite chunk system - there are no correct callbacks to remove items from cache in the new chunk system - - gameprofilerfiller.incrementCounter("getChunkCacheMiss"); - CompletableFuture> completablefuture = this.getChunkFutureMainThread(x, z, leastStatus, create); -@@ -279,9 +272,11 @@ public class ServerChunkCache extends ChunkSource { - - Objects.requireNonNull(completablefuture); - if (!completablefuture.isDone()) { // Paper -+ io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.pushChunkWait(this.level, x1, z1); // Paper - rewrite chunk system - com.destroystokyo.paper.io.SyncLoadFinder.logSyncLoad(this.level, x, z); // Paper - Add debug for sync chunk loads - this.level.timings.syncChunkLoad.startTiming(); // Paper - chunkproviderserver_b.managedBlock(completablefuture::isDone); -+ io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.popChunkWait(); // Paper - rewrite chunk system - this.level.timings.syncChunkLoad.stopTiming(); // Paper - } // Paper - ChunkResult chunkresult = (ChunkResult) completablefuture.join(); -@@ -299,7 +294,7 @@ public class ServerChunkCache extends ChunkSource { - @Nullable - @Override - public LevelChunk getChunkNow(int chunkX, int chunkZ) { -- if (Thread.currentThread() != this.mainThread) { -+ if (!io.papermc.paper.util.TickThread.isTickThread()) { // Paper - rewrite chunk system - return null; - } else { - return this.getChunkAtIfLoadedMainThread(chunkX, chunkZ); // Paper - Perf: Optimise getChunkAt calls for loaded chunks -@@ -313,7 +308,7 @@ public class ServerChunkCache extends ChunkSource { - } - - public CompletableFuture> getChunkFuture(int chunkX, int chunkZ, ChunkStatus leastStatus, boolean create) { -- boolean flag1 = Thread.currentThread() == this.mainThread; -+ boolean flag1 = io.papermc.paper.util.TickThread.isTickThread(); // Paper - rewrite chunk system - CompletableFuture completablefuture; - - if (flag1) { -@@ -333,48 +328,54 @@ public class ServerChunkCache extends ChunkSource { - return completablefuture; - } - -+ - private CompletableFuture> getChunkFutureMainThread(int chunkX, int chunkZ, ChunkStatus leastStatus, boolean create) { -- ChunkPos chunkcoordintpair = new ChunkPos(chunkX, chunkZ); -- long k = chunkcoordintpair.toLong(); -- int l = ChunkLevel.byStatus(leastStatus); -- ChunkHolder playerchunk = this.getVisibleChunkIfPresent(k); -+ // Paper start - add isUrgent - old sig left in place for dirty nms plugins -+ return getChunkFutureMainThread(chunkX, chunkZ, leastStatus, create, false); -+ } -+ private CompletableFuture> getChunkFutureMainThread(int chunkX, int chunkZ, ChunkStatus leastStatus, boolean create, boolean isUrgent) { -+ // Paper start - rewrite chunk system -+ io.papermc.paper.util.TickThread.ensureTickThread(this.level, chunkX, chunkZ, "Scheduling chunk load off-main"); -+ int minLevel = ChunkLevel.byStatus(leastStatus); -+ io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder = this.level.chunkTaskScheduler.chunkHolderManager.getChunkHolder(chunkX, chunkZ); - -- // CraftBukkit start - don't add new ticket for currently unloading chunk -- boolean currentlyUnloading = false; -- if (playerchunk != null) { -- FullChunkStatus oldChunkState = ChunkLevel.fullStatus(playerchunk.oldTicketLevel); -- FullChunkStatus currentChunkState = ChunkLevel.fullStatus(playerchunk.getTicketLevel()); -- currentlyUnloading = (oldChunkState.isOrAfter(FullChunkStatus.FULL) && !currentChunkState.isOrAfter(FullChunkStatus.FULL)); -+ boolean needsFullScheduling = leastStatus == ChunkStatus.FULL && (chunkHolder == null || !chunkHolder.getChunkStatus().isOrAfter(FullChunkStatus.FULL)); -+ -+ if ((chunkHolder == null || chunkHolder.getTicketLevel() > minLevel || needsFullScheduling) && !create) { -+ return ChunkHolder.UNLOADED_CHUNK_FUTURE; - } -- if (create && !currentlyUnloading) { -- // CraftBukkit end -- this.distanceManager.addTicket(TicketType.UNKNOWN, chunkcoordintpair, l, chunkcoordintpair); -- if (this.chunkAbsent(playerchunk, l)) { -- ProfilerFiller gameprofilerfiller = this.level.getProfiler(); -- -- gameprofilerfiller.push("chunkLoad"); -- this.runDistanceManagerUpdates(); -- playerchunk = this.getVisibleChunkIfPresent(k); -- gameprofilerfiller.pop(); -- if (this.chunkAbsent(playerchunk, l)) { -- throw (IllegalStateException) Util.pauseInIde(new IllegalStateException("No chunk holder after ticket has been added")); -+ -+ io.papermc.paper.chunk.system.scheduling.NewChunkHolder.ChunkCompletion chunkCompletion = chunkHolder == null ? null : chunkHolder.getLastChunkCompletion(); -+ if (needsFullScheduling || chunkCompletion == null || !chunkCompletion.genStatus().isOrAfter(leastStatus)) { -+ // schedule -+ CompletableFuture> ret = new CompletableFuture<>(); -+ Consumer complete = (ChunkAccess chunk) -> { -+ if (chunk == null) { -+ ret.complete(ChunkResult.error("Unexpected chunk unload")); -+ } else { -+ ret.complete(ChunkResult.of(chunk)); - } -- } -- } -+ }; - -- return this.chunkAbsent(playerchunk, l) ? ChunkHolder.UNLOADED_CHUNK_FUTURE : playerchunk.getOrScheduleFuture(leastStatus, this.chunkMap); -- } -+ this.level.chunkTaskScheduler.scheduleChunkLoad( -+ chunkX, chunkZ, leastStatus, true, -+ isUrgent ? ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority.BLOCKING : ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority.NORMAL, -+ complete -+ ); - -- private boolean chunkAbsent(@Nullable ChunkHolder holder, int maxLevel) { -- return holder == null || holder.oldTicketLevel > maxLevel; // CraftBukkit using oldTicketLevel for isLoaded checks -+ return ret; -+ } else { -+ // can return now -+ return CompletableFuture.completedFuture(ChunkResult.of(chunkCompletion.chunk())); -+ } -+ // Paper end - rewrite chunk system - } - -+ // Paper - rewrite chunk system -+ - @Override - public boolean hasChunk(int x, int z) { -- ChunkHolder playerchunk = this.getVisibleChunkIfPresent((new ChunkPos(x, z)).toLong()); -- int k = ChunkLevel.byStatus(ChunkStatus.FULL); -- -- return !this.chunkAbsent(playerchunk, k); -+ return this.getChunkAtIfLoadedImmediately(x, z) != null; // Paper - rewrite chunk system - } - - @Nullable -@@ -386,22 +387,13 @@ public class ServerChunkCache extends ChunkSource { - if (playerchunk == null) { - return null; - } else { -- int l = ServerChunkCache.CHUNK_STATUSES.size() - 1; -- -- while (true) { -- ChunkStatus chunkstatus = (ChunkStatus) ServerChunkCache.CHUNK_STATUSES.get(l); -- ChunkAccess ichunkaccess = (ChunkAccess) ((ChunkResult) playerchunk.getFutureIfPresentUnchecked(chunkstatus).getNow(ChunkHolder.UNLOADED_CHUNK)).orElse((Object) null); -- -- if (ichunkaccess != null) { -- return ichunkaccess; -- } -- -- if (chunkstatus == ChunkStatus.INITIALIZE_LIGHT.getParent()) { -- return null; -- } -- -- --l; -+ // Paper start - rewrite chunk system -+ ChunkStatus status = playerchunk.getChunkHolderStatus(); -+ if (status != null && !status.isOrAfter(ChunkStatus.LIGHT.getParent())) { -+ return null; - } -+ return playerchunk.getAvailableChunkNow(); -+ // Paper end - rewrite chunk system - } - } - -@@ -415,15 +407,7 @@ public class ServerChunkCache extends ChunkSource { - } - - public boolean runDistanceManagerUpdates() { // Paper - public -- boolean flag = this.distanceManager.runAllUpdates(this.chunkMap); -- boolean flag1 = this.chunkMap.promoteChunkMap(); -- -- if (!flag && !flag1) { -- return false; -- } else { -- this.clearCache(); -- return true; -- } -+ return this.level.chunkTaskScheduler.chunkHolderManager.processTicketUpdates(); // Paper - rewrite chunk system - } - - // Paper start -@@ -433,9 +417,10 @@ public class ServerChunkCache extends ChunkSource { - // Paper end - - public boolean isPositionTicking(long pos) { -- ChunkHolder playerchunk = this.getVisibleChunkIfPresent(pos); -- -- return playerchunk == null ? false : (!this.level.shouldTickBlocksAt(pos) ? false : ((ChunkResult) playerchunk.getTickingChunkFuture().getNow(ChunkHolder.UNLOADED_LEVEL_CHUNK)).isSuccess()); -+ // Paper start - replace player chunk loader system -+ ChunkHolder holder = this.chunkMap.getVisibleChunkIfPresent(pos); -+ return holder != null && holder.isTickingReady(); -+ // Paper end - replace player chunk loader system - } - - public void save(boolean flush) { -@@ -451,17 +436,13 @@ public class ServerChunkCache extends ChunkSource { - this.close(true); - } - -- public void close(boolean save) throws IOException { -- if (save) { -- this.save(true); -- } -- // CraftBukkit end -- this.lightEngine.close(); -- this.chunkMap.close(); -+ public void close(boolean save) { // Paper - rewrite chunk system -+ this.level.chunkTaskScheduler.chunkHolderManager.close(save, true); // Paper - rewrite chunk system - } - - // CraftBukkit start - modelled on below - public void purgeUnload() { -+ if (true) return; // Paper - tickets will be removed later, this behavior isn't really well accounted for by the chunk system - this.level.getProfiler().push("purge"); - this.distanceManager.purgeStaleTickets(); - this.runDistanceManagerUpdates(); -@@ -485,6 +466,7 @@ public class ServerChunkCache extends ChunkSource { - this.level.getProfiler().popPush("chunks"); - if (tickChunks) { - this.level.timings.chunks.startTiming(); // Paper - timings -+ this.chunkMap.level.playerChunkLoader.tick(); // Paper - replace player chunk loader - this is mostly required to account for view distance changes - this.tickChunks(); - this.level.timings.chunks.stopTiming(); // Paper - timings - this.chunkMap.tick(); -@@ -587,7 +569,12 @@ public class ServerChunkCache extends ChunkSource { - ChunkHolder playerchunk = this.getVisibleChunkIfPresent(pos); - - if (playerchunk != null) { -- ((ChunkResult) playerchunk.getFullChunkFuture().getNow(ChunkHolder.UNLOADED_LEVEL_CHUNK)).ifSuccess(chunkConsumer); -+ // Paper start - rewrite chunk system -+ LevelChunk chunk = playerchunk.getFullChunkNow(); -+ if (chunk != null) { -+ chunkConsumer.accept(chunk); -+ } -+ // Paper end - rewrite chunk system - } - - } -@@ -753,17 +740,10 @@ public class ServerChunkCache extends ChunkSource { - @Override - // CraftBukkit start - process pending Chunk loadCallback() and unloadCallback() after each run task - public boolean pollTask() { -- try { - if (ServerChunkCache.this.runDistanceManagerUpdates()) { - return true; -- } else { -- ServerChunkCache.this.lightEngine.tryScheduleUpdate(); -- return super.pollTask(); - } -- } finally { -- ServerChunkCache.this.chunkMap.callbackExecutor.run(); -- } -- // CraftBukkit end -+ return super.pollTask() | ServerChunkCache.this.level.chunkTaskScheduler.executeMainThreadTask(); // Paper - rewrite chunk system - } - } - -diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java -index b33bf957b1541756e3b983b87b1c83629757739a..0ccdc8d135dd3edb410fbc1d248c20a4a45b37fa 100644 ---- a/src/main/java/net/minecraft/server/level/ServerLevel.java -+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java -@@ -199,7 +199,7 @@ public class ServerLevel extends Level implements WorldGenLevel { - public final PrimaryLevelData serverLevelData; // CraftBukkit - type - private int lastSpawnChunkRadius; - final EntityTickList entityTickList; -- public final PersistentEntitySectionManager entityManager; -+ //public final PersistentEntitySectionManager entityManager; // Paper - rewrite chunk system - private final GameEventDispatcher gameEventDispatcher; - public boolean noSave; - private final SleepStatus sleepStatus; -@@ -268,50 +268,65 @@ public class ServerLevel extends Level implements WorldGenLevel { - return true; - } - -- public final void loadChunksForMoveAsync(AABB axisalignedbb, ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority priority, -- java.util.function.Consumer> onLoad) { -- if (Thread.currentThread() != this.thread) { -- this.getChunkSource().mainThreadProcessor.execute(() -> { -- this.loadChunksForMoveAsync(axisalignedbb, priority, onLoad); -- }); -- return; -- } -+ public final void loadChunksAsync(BlockPos pos, int radiusBlocks, -+ ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority priority, -+ java.util.function.Consumer> onLoad) { -+ loadChunksAsync( -+ (pos.getX() - radiusBlocks) >> 4, -+ (pos.getX() + radiusBlocks) >> 4, -+ (pos.getZ() - radiusBlocks) >> 4, -+ (pos.getZ() + radiusBlocks) >> 4, -+ priority, onLoad -+ ); -+ } -+ -+ public final void loadChunksAsync(BlockPos pos, int radiusBlocks, -+ net.minecraft.world.level.chunk.status.ChunkStatus chunkStatus, -+ ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority priority, -+ java.util.function.Consumer> onLoad) { -+ loadChunksAsync( -+ (pos.getX() - radiusBlocks) >> 4, -+ (pos.getX() + radiusBlocks) >> 4, -+ (pos.getZ() - radiusBlocks) >> 4, -+ (pos.getZ() + radiusBlocks) >> 4, -+ chunkStatus, priority, onLoad -+ ); -+ } -+ -+ public final void loadChunksAsync(int minChunkX, int maxChunkX, int minChunkZ, int maxChunkZ, -+ ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority priority, -+ java.util.function.Consumer> onLoad) { -+ this.loadChunksAsync(minChunkX, maxChunkX, minChunkZ, maxChunkZ, net.minecraft.world.level.chunk.status.ChunkStatus.FULL, priority, onLoad); -+ } -+ -+ public final void loadChunksAsync(int minChunkX, int maxChunkX, int minChunkZ, int maxChunkZ, -+ net.minecraft.world.level.chunk.status.ChunkStatus chunkStatus, -+ ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority priority, -+ java.util.function.Consumer> onLoad) { - List ret = new java.util.ArrayList<>(); -- it.unimi.dsi.fastutil.ints.IntArrayList ticketLevels = new it.unimi.dsi.fastutil.ints.IntArrayList(); -- -- int minBlockX = Mth.floor(axisalignedbb.minX - 1.0E-7D) - 3; -- int maxBlockX = Mth.floor(axisalignedbb.maxX + 1.0E-7D) + 3; -- -- int minBlockZ = Mth.floor(axisalignedbb.minZ - 1.0E-7D) - 3; -- int maxBlockZ = Mth.floor(axisalignedbb.maxZ + 1.0E-7D) + 3; -- -- int minChunkX = minBlockX >> 4; -- int maxChunkX = maxBlockX >> 4; -- -- int minChunkZ = minBlockZ >> 4; -- int maxChunkZ = maxBlockZ >> 4; - - ServerChunkCache chunkProvider = this.getChunkSource(); - - int requiredChunks = (maxChunkX - minChunkX + 1) * (maxChunkZ - minChunkZ + 1); -- int[] loadedChunks = new int[1]; -+ java.util.concurrent.atomic.AtomicInteger loadedChunks = new java.util.concurrent.atomic.AtomicInteger(); - -- Long holderIdentifier = Long.valueOf(chunkProvider.chunkFutureAwaitCounter++); -+ Long holderIdentifier = Long.valueOf(chunkProvider.chunkFutureAwaitCounter.getAndIncrement()); -+ -+ int ticketLevel = 33 + net.minecraft.world.level.chunk.status.ChunkStatus.getDistance(chunkStatus); - - java.util.function.Consumer consumer = (net.minecraft.world.level.chunk.ChunkAccess chunk) -> { - if (chunk != null) { -- int ticketLevel = Math.max(33, chunkProvider.chunkMap.getUpdatingChunkIfPresent(chunk.getPos().toLong()).getTicketLevel()); -+ synchronized (ret) { - ret.add(chunk); -- ticketLevels.add(ticketLevel); -+ } - chunkProvider.addTicketAtLevel(TicketType.FUTURE_AWAIT, chunk.getPos(), ticketLevel, holderIdentifier); - } -- if (++loadedChunks[0] == requiredChunks) { -+ if (loadedChunks.incrementAndGet() == requiredChunks) { - try { - onLoad.accept(java.util.Collections.unmodifiableList(ret)); - } finally { - for (int i = 0, len = ret.size(); i < len; ++i) { - ChunkPos chunkPos = ret.get(i).getPos(); -- int ticketLevel = ticketLevels.getInt(i); - - chunkProvider.addTicketAtLevel(TicketType.UNKNOWN, chunkPos, ticketLevel, chunkPos); - chunkProvider.removeTicketAtLevel(TicketType.FUTURE_AWAIT, chunkPos, ticketLevel, holderIdentifier); -@@ -323,12 +338,228 @@ public class ServerLevel extends Level implements WorldGenLevel { - for (int cx = minChunkX; cx <= maxChunkX; ++cx) { - for (int cz = minChunkZ; cz <= maxChunkZ; ++cz) { - io.papermc.paper.chunk.system.ChunkSystem.scheduleChunkLoad( -- this, cx, cz, net.minecraft.world.level.chunk.status.ChunkStatus.FULL, true, priority, consumer -+ this, cx, cz, chunkStatus, true, priority, consumer - ); - } - } - } -- // Paper end -+ -+ public final void loadChunksForMoveAsync(AABB axisalignedbb, ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority priority, -+ java.util.function.Consumer> onLoad) { -+ -+ int minBlockX = Mth.floor(axisalignedbb.minX - 1.0E-7D) - 3; -+ int maxBlockX = Mth.floor(axisalignedbb.maxX + 1.0E-7D) + 3; -+ -+ int minBlockZ = Mth.floor(axisalignedbb.minZ - 1.0E-7D) - 3; -+ int maxBlockZ = Mth.floor(axisalignedbb.maxZ + 1.0E-7D) + 3; -+ -+ int minChunkX = minBlockX >> 4; -+ int maxChunkX = maxBlockX >> 4; -+ -+ int minChunkZ = minBlockZ >> 4; -+ int maxChunkZ = maxBlockZ >> 4; -+ -+ this.loadChunksAsync(minChunkX, maxChunkX, minChunkZ, maxChunkZ, priority, onLoad); -+ } -+ -+ // Paper start - rewrite chunk system -+ public final io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler chunkTaskScheduler; -+ public final io.papermc.paper.chunk.system.io.RegionFileIOThread.ChunkDataController chunkDataControllerNew -+ = new io.papermc.paper.chunk.system.io.RegionFileIOThread.ChunkDataController(io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.CHUNK_DATA) { -+ -+ @Override -+ public net.minecraft.world.level.chunk.storage.RegionFileStorage getCache() { -+ return ServerLevel.this.getChunkSource().chunkMap.regionFileCache; -+ } -+ -+ @Override -+ public void writeData(int chunkX, int chunkZ, net.minecraft.nbt.CompoundTag compound) throws IOException { -+ ServerLevel.this.getChunkSource().chunkMap.write(new ChunkPos(chunkX, chunkZ), compound); -+ } -+ -+ @Override -+ public net.minecraft.nbt.CompoundTag readData(int chunkX, int chunkZ) throws IOException { -+ return ServerLevel.this.getChunkSource().chunkMap.readSync(new ChunkPos(chunkX, chunkZ)); -+ } -+ }; -+ public final io.papermc.paper.chunk.system.io.RegionFileIOThread.ChunkDataController poiDataControllerNew -+ = new io.papermc.paper.chunk.system.io.RegionFileIOThread.ChunkDataController(io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.POI_DATA) { -+ -+ @Override -+ public net.minecraft.world.level.chunk.storage.RegionFileStorage getCache() { -+ return ServerLevel.this.getChunkSource().chunkMap.getPoiManager(); -+ } -+ -+ @Override -+ public void writeData(int chunkX, int chunkZ, net.minecraft.nbt.CompoundTag compound) throws IOException { -+ ServerLevel.this.getChunkSource().chunkMap.getPoiManager().write(new ChunkPos(chunkX, chunkZ), compound); -+ } -+ -+ @Override -+ public net.minecraft.nbt.CompoundTag readData(int chunkX, int chunkZ) throws IOException { -+ return ServerLevel.this.getChunkSource().chunkMap.getPoiManager().read(new ChunkPos(chunkX, chunkZ)); -+ } -+ }; -+ public final io.papermc.paper.chunk.system.io.RegionFileIOThread.ChunkDataController entityDataControllerNew -+ = new io.papermc.paper.chunk.system.io.RegionFileIOThread.ChunkDataController(io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.ENTITY_DATA) { -+ -+ @Override -+ public net.minecraft.world.level.chunk.storage.RegionFileStorage getCache() { -+ return ServerLevel.this.entityStorage; -+ } -+ -+ @Override -+ public void writeData(int chunkX, int chunkZ, net.minecraft.nbt.CompoundTag compound) throws IOException { -+ ServerLevel.this.writeEntityChunk(chunkX, chunkZ, compound); -+ } -+ -+ @Override -+ public net.minecraft.nbt.CompoundTag readData(int chunkX, int chunkZ) throws IOException { -+ return ServerLevel.this.readEntityChunk(chunkX, chunkZ); -+ } -+ }; -+ private final EntityRegionFileStorage entityStorage; -+ -+ private static final class EntityRegionFileStorage extends net.minecraft.world.level.chunk.storage.RegionFileStorage { -+ -+ public EntityRegionFileStorage(RegionStorageInfo storageKey, Path directory, boolean dsync) { -+ super(storageKey, directory, dsync); -+ } -+ -+ protected void write(ChunkPos pos, net.minecraft.nbt.CompoundTag nbt) throws IOException { -+ ChunkPos nbtPos = nbt == null ? null : EntityStorage.readChunkPos(nbt); -+ if (nbtPos != null && !pos.equals(nbtPos)) { -+ throw new IllegalArgumentException( -+ "Entity chunk coordinate and serialized data do not have matching coordinates, trying to serialize coordinate " + pos.toString() -+ + " but compound says coordinate is " + nbtPos + " for world: " + this -+ ); -+ } -+ super.write(pos, nbt); -+ } -+ } -+ -+ private void writeEntityChunk(int chunkX, int chunkZ, net.minecraft.nbt.CompoundTag compound) throws IOException { -+ if (!io.papermc.paper.chunk.system.io.RegionFileIOThread.isRegionFileThread()) { -+ io.papermc.paper.chunk.system.io.RegionFileIOThread.scheduleSave( -+ this, chunkX, chunkZ, compound, -+ io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.ENTITY_DATA); -+ return; -+ } -+ this.entityStorage.write(new ChunkPos(chunkX, chunkZ), compound); -+ } -+ -+ private net.minecraft.nbt.CompoundTag readEntityChunk(int chunkX, int chunkZ) throws IOException { -+ if (!io.papermc.paper.chunk.system.io.RegionFileIOThread.isRegionFileThread()) { -+ return io.papermc.paper.chunk.system.io.RegionFileIOThread.loadData( -+ this, chunkX, chunkZ, io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.ENTITY_DATA, -+ io.papermc.paper.chunk.system.io.RegionFileIOThread.getIOBlockingPriorityForCurrentThread() -+ ); -+ } -+ return this.entityStorage.read(new ChunkPos(chunkX, chunkZ)); -+ } -+ -+ private final io.papermc.paper.chunk.system.entity.EntityLookup entityLookup; -+ public final io.papermc.paper.chunk.system.entity.EntityLookup getEntityLookup() { -+ return this.entityLookup; -+ } -+ -+ private final java.util.concurrent.atomic.AtomicLong nonFullSyncLoadIdGenerator = new java.util.concurrent.atomic.AtomicLong(); -+ -+ private ChunkAccess getIfAboveStatus(int chunkX, int chunkZ, net.minecraft.world.level.chunk.status.ChunkStatus status) { -+ io.papermc.paper.chunk.system.scheduling.NewChunkHolder loaded = -+ this.chunkTaskScheduler.chunkHolderManager.getChunkHolder(chunkX, chunkZ); -+ io.papermc.paper.chunk.system.scheduling.NewChunkHolder.ChunkCompletion loadedCompletion; -+ if (loaded != null && (loadedCompletion = loaded.getLastChunkCompletion()) != null && loadedCompletion.genStatus().isOrAfter(status)) { -+ return loadedCompletion.chunk(); -+ } -+ -+ return null; -+ } -+ -+ @Override -+ public ChunkAccess syncLoadNonFull(int chunkX, int chunkZ, net.minecraft.world.level.chunk.status.ChunkStatus status) { -+ if (status == null || status.isOrAfter(net.minecraft.world.level.chunk.status.ChunkStatus.FULL)) { -+ throw new IllegalArgumentException("Status: " + status); -+ } -+ ChunkAccess loaded = this.getIfAboveStatus(chunkX, chunkZ, status); -+ if (loaded != null) { -+ return loaded; -+ } -+ -+ Long ticketId = Long.valueOf(this.nonFullSyncLoadIdGenerator.getAndIncrement()); -+ int ticketLevel = 33 + net.minecraft.world.level.chunk.status.ChunkStatus.getDistance(status); -+ this.chunkTaskScheduler.chunkHolderManager.addTicketAtLevel( -+ TicketType.NON_FULL_SYNC_LOAD, chunkX, chunkZ, ticketLevel, ticketId -+ ); -+ this.chunkTaskScheduler.chunkHolderManager.processTicketUpdates(); -+ -+ this.chunkTaskScheduler.beginChunkLoadForNonFullSync(chunkX, chunkZ, status, ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority.BLOCKING); -+ -+ // we could do a simple spinwait here, since we do not need to process tasks while performing this load -+ // but we process tasks only because it's a better use of the time spent -+ this.chunkSource.mainThreadProcessor.managedBlock(() -> { -+ return ServerLevel.this.getIfAboveStatus(chunkX, chunkZ, status) != null; -+ }); -+ -+ loaded = ServerLevel.this.getIfAboveStatus(chunkX, chunkZ, status); -+ if (loaded == null) { -+ throw new IllegalStateException("Expected chunk to be loaded for status " + status); -+ } -+ -+ this.chunkTaskScheduler.chunkHolderManager.removeTicketAtLevel( -+ TicketType.NON_FULL_SYNC_LOAD, chunkX, chunkZ, ticketLevel, ticketId -+ ); -+ -+ return loaded; -+ } -+ -+ public final int getRegionChunkShift() { -+ // placeholder for folia -+ return io.papermc.paper.threadedregions.TickRegions.getRegionChunkShift(); -+ } -+ // Paper end - rewrite chunk system -+ -+ public final io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader playerChunkLoader = new io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader(this); -+ private final java.util.concurrent.atomic.AtomicReference viewDistances = new java.util.concurrent.atomic.AtomicReference<>(new io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.ViewDistances(-1, -1, -1)); -+ -+ public io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.ViewDistances getViewDistances() { -+ return this.viewDistances.get(); -+ } -+ -+ private void updateViewDistance(final java.util.function.Function update) { -+ for (io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.ViewDistances curr = this.viewDistances.get();;) { -+ if (this.viewDistances.compareAndSet(curr, update.apply(curr))) { -+ return; -+ } -+ } -+ } -+ -+ public void setTickViewDistance(final int distance) { -+ if ((distance < io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MIN_VIEW_DISTANCE || distance > io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MAX_VIEW_DISTANCE)) { -+ throw new IllegalArgumentException("Tick view distance must be a number between " + io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MIN_VIEW_DISTANCE + " and " + (io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MAX_VIEW_DISTANCE) + ", got: " + distance); -+ } -+ this.updateViewDistance((input) -> { -+ return input.setTickViewDistance(distance); -+ }); -+ } -+ -+ public void setLoadViewDistance(final int distance) { -+ if (distance != -1 && (distance < io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MIN_VIEW_DISTANCE || distance > io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MAX_VIEW_DISTANCE + 1)) { -+ throw new IllegalArgumentException("Load view distance must be a number between " + io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MIN_VIEW_DISTANCE + " and " + (io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MAX_VIEW_DISTANCE + 1) + " or -1, got: " + distance); -+ } -+ this.updateViewDistance((input) -> { -+ return input.setLoadViewDistance(distance); -+ }); -+ } -+ -+ public void setSendViewDistance(final int distance) { -+ if (distance != -1 && (distance < io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MIN_VIEW_DISTANCE || distance > io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MAX_VIEW_DISTANCE + 1)) { -+ throw new IllegalArgumentException("Send view distance must be a number between " + io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MIN_VIEW_DISTANCE + " and " + (io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MAX_VIEW_DISTANCE + 1) + " or -1, got: " + distance); -+ } -+ this.updateViewDistance((input) -> { -+ return input.setSendViewDistance(distance); -+ }); -+ } - - // Paper start - optimise getPlayerByUUID - @Nullable -@@ -382,16 +613,16 @@ public class ServerLevel extends Level implements WorldGenLevel { - // CraftBukkit end - boolean flag2 = minecraftserver.forceSynchronousWrites(); - DataFixer datafixer = minecraftserver.getFixerUpper(); -- EntityPersistentStorage entitypersistentstorage = new EntityStorage(new SimpleRegionStorage(new RegionStorageInfo(convertable_conversionsession.getLevelId(), resourcekey, "entities"), convertable_conversionsession.getDimensionPath(resourcekey).resolve("entities"), datafixer, flag2, DataFixTypes.ENTITY_CHUNK), this, minecraftserver); -+ this.entityStorage = new EntityRegionFileStorage(new RegionStorageInfo(convertable_conversionsession.getLevelId(), resourcekey, "entities"), convertable_conversionsession.getDimensionPath(resourcekey).resolve("entities"), flag2); // Paper - rewrite chunk system - -- this.entityManager = new PersistentEntitySectionManager<>(Entity.class, new ServerLevel.EntityCallbacks(), entitypersistentstorage); -+ // this.entityManager = new PersistentEntitySectionManager<>(Entity.class, new ServerLevel.EntityCallbacks(), entitypersistentstorage, this.entitySliceManager); // Paper // Paper - rewrite chunk system - StructureTemplateManager structuretemplatemanager = minecraftserver.getStructureManager(); - int j = this.spigotConfig.viewDistance; // Spigot - int k = this.spigotConfig.simulationDistance; // Spigot -- PersistentEntitySectionManager persistententitysectionmanager = this.entityManager; -+ //PersistentEntitySectionManager persistententitysectionmanager = this.entityManager; // Paper - rewrite chunk system - -- Objects.requireNonNull(this.entityManager); -- this.chunkSource = new ServerChunkCache(this, convertable_conversionsession, datafixer, structuretemplatemanager, executor, chunkgenerator, j, k, flag2, worldloadlistener, persistententitysectionmanager::updateChunkStatus, () -> { -+ //Objects.requireNonNull(this.entityManager); // Paper - rewrite chunk system -+ this.chunkSource = new ServerChunkCache(this, convertable_conversionsession, datafixer, structuretemplatemanager, executor, chunkgenerator, j, k, flag2, worldloadlistener, null, () -> { // Paper - rewrite chunk system - return minecraftserver.overworld().getDataStorage(); - }); - this.chunkSource.getGeneratorState().ensureStructuresGenerated(); -@@ -420,6 +651,9 @@ public class ServerLevel extends Level implements WorldGenLevel { - return (RandomSequences) this.getDataStorage().computeIfAbsent(RandomSequences.factory(l), "random_sequences"); - }); - this.getCraftServer().addWorld(this.getWorld()); // CraftBukkit -+ -+ this.chunkTaskScheduler = new io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler(this, io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.workerThreads); // Paper - rewrite chunk system -+ this.entityLookup = new io.papermc.paper.chunk.system.entity.EntityLookup(this, new EntityCallbacks()); // Paper - rewrite chunk system - } - - // Paper start -@@ -552,7 +786,7 @@ public class ServerLevel extends Level implements WorldGenLevel { - gameprofilerfiller.push("checkDespawn"); - entity.checkDespawn(); - gameprofilerfiller.pop(); -- if (this.chunkSource.chunkMap.getDistanceManager().inEntityTickingRange(entity.chunkPosition().toLong())) { -+ if (true || this.chunkSource.chunkMap.getDistanceManager().inEntityTickingRange(entity.chunkPosition().toLong())) { // Paper - now always true if in the ticking list - Entity entity1 = entity.getVehicle(); - - if (entity1 != null) { -@@ -577,13 +811,16 @@ public class ServerLevel extends Level implements WorldGenLevel { - } - - gameprofilerfiller.push("entityManagement"); -- this.entityManager.tick(); -+ //this.entityManager.tick(); // Paper - rewrite chunk system - gameprofilerfiller.pop(); - } - - @Override - public boolean shouldTickBlocksAt(long chunkPos) { -- return this.chunkSource.chunkMap.getDistanceManager().inBlockTickingRange(chunkPos); -+ // Paper start - replace player chunk loader system -+ ChunkHolder holder = this.chunkSource.chunkMap.getVisibleChunkIfPresent(chunkPos); -+ return holder != null && holder.isTickingReady(); -+ // Paper end - replace player chunk loader system - } - - protected void tickTime() { -@@ -1060,6 +1297,11 @@ public class ServerLevel extends Level implements WorldGenLevel { - } - - public void save(@Nullable ProgressListener progressListener, boolean flush, boolean savingDisabled) { -+ // Paper start - rewrite chunk system - add close param -+ this.save(progressListener, flush, savingDisabled, false); -+ } -+ public void save(@Nullable ProgressListener progressListener, boolean flush, boolean savingDisabled, boolean close) { -+ // Paper end - rewrite chunk system - add close param - ServerChunkCache chunkproviderserver = this.getChunkSource(); - - if (!savingDisabled) { -@@ -1075,16 +1317,13 @@ public class ServerLevel extends Level implements WorldGenLevel { - } - - timings.worldSaveChunks.startTiming(); // Paper -- chunkproviderserver.save(flush); -+ if (!close) chunkproviderserver.save(flush); // Paper - rewrite chunk system -+ if (close) chunkproviderserver.close(true); // Paper - rewrite chunk system - timings.worldSaveChunks.stopTiming(); // Paper - }// Paper -- if (flush) { -- this.entityManager.saveAll(); -- } else { -- this.entityManager.autoSave(); -- } -+ // Paper - rewrite chunk system - entity saving moved into ChunkHolder - -- } -+ } else if (close) { chunkproviderserver.close(false); } // Paper - rewrite chunk system - - // CraftBukkit start - moved from MinecraftServer.saveChunks - ServerLevel worldserver1 = this; -@@ -1220,7 +1459,7 @@ public class ServerLevel extends Level implements WorldGenLevel { - this.removePlayerImmediately((ServerPlayer) entity, Entity.RemovalReason.DISCARDED); - } - -- this.entityManager.addNewEntity(player); -+ this.entityLookup.addNewEntity(player); // Paper - rewite chunk system - } - - // CraftBukkit start -@@ -1251,7 +1490,7 @@ public class ServerLevel extends Level implements WorldGenLevel { - } - // CraftBukkit end - -- return this.entityManager.addNewEntity(entity); -+ return this.entityLookup.addNewEntity(entity); // Paper - rewrite chunk system - } - } - -@@ -1263,10 +1502,10 @@ public class ServerLevel extends Level implements WorldGenLevel { - public boolean tryAddFreshEntityWithPassengers(Entity entity, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason reason) { - // CraftBukkit end - Stream stream = entity.getSelfAndPassengers().map(Entity::getUUID); // CraftBukkit - decompile error -- PersistentEntitySectionManager persistententitysectionmanager = this.entityManager; -+ //PersistentEntitySectionManager persistententitysectionmanager = this.entityManager; // Paper - rewrite chunk system - -- Objects.requireNonNull(this.entityManager); -- if (stream.anyMatch(persistententitysectionmanager::isLoaded)) { -+ //Objects.requireNonNull(this.entityManager); // Paper - rewrite chunk system -+ if (stream.anyMatch(this.entityLookup::hasEntity)) { // Paper - rewrite chunk system - return false; - } else { - this.addFreshEntityWithPassengers(entity, reason); // CraftBukkit -@@ -1852,7 +2091,7 @@ public class ServerLevel extends Level implements WorldGenLevel { - } - } - -- bufferedwriter.write(String.format(Locale.ROOT, "entities: %s\n", this.entityManager.gatherStats())); -+ bufferedwriter.write(String.format(Locale.ROOT, "entities: %s\n", this.entityLookup.getDebugInfo())); // Paper - rewrite chunk system - bufferedwriter.write(String.format(Locale.ROOT, "block_entity_tickers: %d\n", this.blockEntityTickers.size())); - bufferedwriter.write(String.format(Locale.ROOT, "block_ticks: %d\n", this.getBlockTicks().count())); - bufferedwriter.write(String.format(Locale.ROOT, "fluid_ticks: %d\n", this.getFluidTicks().count())); -@@ -1901,7 +2140,7 @@ public class ServerLevel extends Level implements WorldGenLevel { - BufferedWriter bufferedwriter2 = Files.newBufferedWriter(path1); - - try { -- playerchunkmap.dumpChunks(bufferedwriter2); -+ //playerchunkmap.dumpChunks(bufferedwriter2); // Paper - rewrite chunk system - } catch (Throwable throwable4) { - if (bufferedwriter2 != null) { - try { -@@ -1922,7 +2161,7 @@ public class ServerLevel extends Level implements WorldGenLevel { - BufferedWriter bufferedwriter3 = Files.newBufferedWriter(path2); - - try { -- this.entityManager.dumpSections(bufferedwriter3); -+ //this.entityManager.dumpSections(bufferedwriter3); // Paper - rewrite chunk system - } catch (Throwable throwable6) { - if (bufferedwriter3 != null) { - try { -@@ -2064,7 +2303,7 @@ public class ServerLevel extends Level implements WorldGenLevel { - - @VisibleForTesting - public String getWatchdogStats() { -- return String.format(Locale.ROOT, "players: %s, entities: %s [%s], block_entities: %d [%s], block_ticks: %d, fluid_ticks: %d, chunk_source: %s", this.players.size(), this.entityManager.gatherStats(), ServerLevel.getTypeCount(this.entityManager.getEntityGetter().getAll(), (entity) -> { -+ return String.format(Locale.ROOT, "players: %s, entities: %s [%s], block_entities: %d [%s], block_ticks: %d, fluid_ticks: %d, chunk_source: %s", this.players.size(), this.entityLookup.getDebugInfo(), ServerLevel.getTypeCount(this.entityLookup.getAll(), (entity) -> { // Paper - rewrite chunk system - return BuiltInRegistries.ENTITY_TYPE.getKey(entity.getType()).toString(); - }), this.blockEntityTickers.size(), ServerLevel.getTypeCount(this.blockEntityTickers, TickingBlockEntity::getType), this.getBlockTicks().count(), this.getFluidTicks().count(), this.gatherChunkSourceStats()); - } -@@ -2124,15 +2363,15 @@ public class ServerLevel extends Level implements WorldGenLevel { - @Override - public LevelEntityGetter getEntities() { - org.spigotmc.AsyncCatcher.catchOp("Chunk getEntities call"); // Spigot -- return this.entityManager.getEntityGetter(); -+ return this.entityLookup; // Paper - rewrite chunk system - } - -- public void addLegacyChunkEntities(Stream entities) { -- this.entityManager.addLegacyChunkEntities(entities); -+ public void addLegacyChunkEntities(Stream entities, ChunkPos forChunk) { // Paper - rewrite chunk system -+ this.entityLookup.addLegacyChunkEntities(entities.toList(), forChunk); // Paper - rewrite chunk system - } - -- public void addWorldGenChunkEntities(Stream entities) { -- this.entityManager.addWorldGenChunkEntities(entities); -+ public void addWorldGenChunkEntities(Stream entities, ChunkPos forChunk) { // Paper - rewrite chunk system -+ this.entityLookup.addWorldGenChunkEntities(entities.toList(), forChunk); // Paper - rewrite chunk system - } - - public void startTickingChunk(LevelChunk chunk) { -@@ -2152,34 +2391,49 @@ public class ServerLevel extends Level implements WorldGenLevel { - @Override - public void close() throws IOException { - super.close(); -- this.entityManager.close(); -+ //this.entityManager.close(); // Paper - rewrite chunk system - } - - @Override - public String gatherChunkSourceStats() { - String s = this.chunkSource.gatherStats(); - -- return "Chunks[S] W: " + s + " E: " + this.entityManager.gatherStats(); -+ return "Chunks[S] W: " + s + " E: " + this.entityLookup.getDebugInfo(); // Paper - rewrite chunk system - } - - public boolean areEntitiesLoaded(long chunkPos) { -- return this.entityManager.areEntitiesLoaded(chunkPos); -+ // Paper start - rewrite chunk system -+ return this.getChunkIfLoadedImmediately(ChunkPos.getX(chunkPos), ChunkPos.getZ(chunkPos)) != null; -+ // Paper end - rewrite chunk system - } - - private boolean isPositionTickingWithEntitiesLoaded(long chunkPos) { -- return this.areEntitiesLoaded(chunkPos) && this.chunkSource.isPositionTicking(chunkPos); -+ // Paper start - optimize is ticking ready type functions -+ io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder = this.chunkTaskScheduler.chunkHolderManager.getChunkHolder(chunkPos); -+ // isTicking implies the chunk is loaded, and the chunk is loaded now implies the entities are loaded -+ return chunkHolder != null && chunkHolder.isTickingReady(); -+ // Paper end - } - - public boolean isPositionEntityTicking(BlockPos pos) { -- return this.entityManager.canPositionTick(pos) && this.chunkSource.chunkMap.getDistanceManager().inEntityTickingRange(ChunkPos.asLong(pos)); -+ // Paper start - rewrite chunk system -+ io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder = this.chunkTaskScheduler.chunkHolderManager.getChunkHolder(io.papermc.paper.util.CoordinateUtils.getChunkKey(pos)); -+ return chunkHolder != null && chunkHolder.isEntityTickingReady(); -+ // Paper end - rewrite chunk system - } - - public boolean isNaturalSpawningAllowed(BlockPos pos) { -- return this.entityManager.canPositionTick(pos); -+ // Paper start - rewrite chunk system -+ io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder = this.chunkTaskScheduler.chunkHolderManager.getChunkHolder(io.papermc.paper.util.CoordinateUtils.getChunkKey(pos)); -+ return chunkHolder != null && chunkHolder.isEntityTickingReady(); -+ // Paper end - rewrite chunk system - } - - public boolean isNaturalSpawningAllowed(ChunkPos pos) { -- return this.entityManager.canPositionTick(pos); -+ // Paper start - rewrite chunk system -+ io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder = this.chunkTaskScheduler.chunkHolderManager.getChunkHolder(io.papermc.paper.util.CoordinateUtils.getChunkKey(pos)); -+ return chunkHolder != null && chunkHolder.isEntityTickingReady(); -+ // Paper end - rewrite chunk system - } - - @Override -@@ -2205,7 +2459,7 @@ public class ServerLevel extends Level implements WorldGenLevel { - CrashReportCategory crashreportsystemdetails = super.fillReportDetails(report); - - crashreportsystemdetails.setDetail("Loaded entity count", () -> { -- return String.valueOf(this.entityManager.count()); -+ return String.valueOf(this.entityLookup.getAllCopy().length); // Paper - }); - return crashreportsystemdetails; - } -diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java -index b032ce115b98af0e0384fb88ca88075eb4ffac11..e2b72b07888e84fb4472920932b3feedbd4829b9 100644 ---- a/src/main/java/net/minecraft/server/level/ServerPlayer.java -+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java -@@ -293,6 +293,50 @@ public class ServerPlayer extends Player { - public @Nullable String clientBrandName = null; // Paper - Brand support - public org.bukkit.event.player.PlayerQuitEvent.QuitReason quitReason = null; // Paper - Add API for quit reason; there are a lot of changes to do if we change all methods leading to the event - -+ // Paper start - replace player chunk loader -+ private final java.util.concurrent.atomic.AtomicReference viewDistances = new java.util.concurrent.atomic.AtomicReference<>(new io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.ViewDistances(-1, -1, -1)); -+ public io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.PlayerChunkLoaderData chunkLoader; -+ -+ public io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.ViewDistances getViewDistances() { -+ return this.viewDistances.get(); -+ } -+ -+ private void updateViewDistance(final java.util.function.Function update) { -+ for (io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.ViewDistances curr = this.viewDistances.get();;) { -+ if (this.viewDistances.compareAndSet(curr, update.apply(curr))) { -+ return; -+ } -+ } -+ } -+ -+ public void setTickViewDistance(final int distance) { -+ if ((distance < io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MIN_VIEW_DISTANCE || distance > io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MAX_VIEW_DISTANCE)) { -+ throw new IllegalArgumentException("Tick view distance must be a number between " + io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MIN_VIEW_DISTANCE + " and " + (io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MAX_VIEW_DISTANCE) + ", got: " + distance); -+ } -+ this.updateViewDistance((input) -> { -+ return input.setTickViewDistance(distance); -+ }); -+ } -+ -+ public void setLoadViewDistance(final int distance) { -+ if (distance != -1 && (distance < io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MIN_VIEW_DISTANCE || distance > io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MAX_VIEW_DISTANCE + 1)) { -+ throw new IllegalArgumentException("Load view distance must be a number between " + io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MIN_VIEW_DISTANCE + " and " + (io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MAX_VIEW_DISTANCE + 1) + " or -1, got: " + distance); -+ } -+ this.updateViewDistance((input) -> { -+ return input.setLoadViewDistance(distance); -+ }); -+ } -+ -+ public void setSendViewDistance(final int distance) { -+ if (distance != -1 && (distance < io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MIN_VIEW_DISTANCE || distance > io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MAX_VIEW_DISTANCE + 1)) { -+ throw new IllegalArgumentException("Send view distance must be a number between " + io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MIN_VIEW_DISTANCE + " and " + (io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MAX_VIEW_DISTANCE + 1) + " or -1, got: " + distance); -+ } -+ this.updateViewDistance((input) -> { -+ return input.setSendViewDistance(distance); -+ }); -+ } -+ // Paper end - replace player chunk loader -+ - public ServerPlayer(MinecraftServer server, ServerLevel world, GameProfile profile, ClientInformation clientOptions) { - super(world, world.getSharedSpawnPos(), world.getSharedSpawnAngle(), profile); - this.chatVisibility = ChatVisiblity.FULL; -diff --git a/src/main/java/net/minecraft/server/level/ThreadedLevelLightEngine.java b/src/main/java/net/minecraft/server/level/ThreadedLevelLightEngine.java -index f206df06a7d8895175db31d4a840d7467ffe826f..8ef22f8f0d6da49247a90152e5cfa9ffc7f596a4 100644 ---- a/src/main/java/net/minecraft/server/level/ThreadedLevelLightEngine.java -+++ b/src/main/java/net/minecraft/server/level/ThreadedLevelLightEngine.java -@@ -37,15 +37,12 @@ import net.minecraft.world.level.chunk.status.ChunkStatus; - public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCloseable { - public static final int DEFAULT_BATCH_SIZE = 1000; - private static final Logger LOGGER = LogUtils.getLogger(); -- private final ProcessorMailbox taskMailbox; -- private final ObjectList> lightTasks = new ObjectArrayList<>(); -+ // Paper - rewrite chunk system - private final ChunkMap chunkMap; -- private final ProcessorHandle> sorterMailbox; -- private final int taskPerBatch = 1000; -- private final AtomicBoolean scheduled = new AtomicBoolean(); -+ // Paper - rewrite chunk system - - // Paper start - replace light engine impl -- protected final ca.spottedleaf.starlight.common.light.StarLightInterface theLightEngine; -+ public final ca.spottedleaf.starlight.common.light.StarLightInterface theLightEngine; - public final boolean hasBlockLight; - public final boolean hasSkyLight; - // Paper end - replace light engine impl -@@ -59,8 +56,7 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl - ) { - super(chunkProvider, false, false); // Paper - destroy vanilla light engine state - this.chunkMap = chunkStorage; -- this.sorterMailbox = executor; -- this.taskMailbox = processor; -+ // Paper - rewrite chunk system - // Paper start - replace light engine impl - this.hasBlockLight = true; - this.hasSkyLight = hasBlockLight; // Nice variable name. -@@ -104,7 +100,7 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl - ++totalChunks; - } - -- this.taskMailbox.tell(() -> { -+ this.chunkMap.level.chunkTaskScheduler.radiusAwareScheduler.queueInfiniteRadiusTask(() -> { // Paper - rewrite chunk system - this.theLightEngine.relightChunks(chunks, (ChunkPos chunkPos) -> { - chunkLightCallback.accept(chunkPos); - ((java.util.concurrent.Executor)((ServerLevel)this.theLightEngine.getWorld()).getChunkSource().mainThreadProcessor).execute(() -> { -@@ -121,7 +117,7 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl - private final Long2IntOpenHashMap chunksBeingWorkedOn = new Long2IntOpenHashMap(); - - private void queueTaskForSection(final int chunkX, final int chunkY, final int chunkZ, -- final Supplier runnable) { -+ final Supplier runnable) { // Paper - rewrite chunk system - final ServerLevel world = (ServerLevel)this.theLightEngine.getWorld(); - - final ChunkAccess center = this.theLightEngine.getAnyChunkNow(chunkX, chunkZ); -@@ -148,7 +144,7 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl - - final long key = CoordinateUtils.getChunkKey(chunkX, chunkZ); - -- final ca.spottedleaf.starlight.common.light.StarLightInterface.LightQueue.ChunkTasks updateFuture = runnable.get(); -+ final io.papermc.paper.chunk.system.light.LightQueue.ChunkTasks updateFuture = runnable.get(); // Paper - rewrite chunk system - - if (updateFuture == null) { - // not scheduled -@@ -285,16 +281,11 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl - } - - private void addTask(int x, int z, ThreadedLevelLightEngine.TaskType stage, Runnable task) { -- this.addTask(x, z, this.chunkMap.getChunkQueueLevel(ChunkPos.asLong(x, z)), stage, task); -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - private void addTask(int x, int z, IntSupplier completedLevelSupplier, ThreadedLevelLightEngine.TaskType stage, Runnable task) { -- this.sorterMailbox.tell(ChunkTaskPriorityQueueSorter.message(() -> { -- this.lightTasks.add(Pair.of(stage, task)); -- if (this.lightTasks.size() >= 1000) { -- this.runUpdate(); -- } -- }, ChunkPos.asLong(x, z), completedLevelSupplier)); -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - @Override -@@ -327,83 +318,15 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl - } - - public CompletableFuture lightChunk(ChunkAccess chunk, boolean excludeBlocks) { -- // Paper start - replace light engine impl -- if (true) { -- boolean lit = excludeBlocks; -- final ChunkPos chunkPos = chunk.getPos(); -- -- return CompletableFuture.supplyAsync(() -> { -- final Boolean[] emptySections = StarLightEngine.getEmptySectionsForChunk(chunk); -- if (!lit) { -- chunk.setLightCorrect(false); -- this.theLightEngine.lightChunk(chunk, emptySections); -- chunk.setLightCorrect(true); -- } else { -- this.theLightEngine.forceLoadInChunk(chunk, emptySections); -- // can't really force the chunk to be edged checked, as we need neighbouring chunks - but we don't have -- // them, so if it's not loaded then i guess we can't do edge checks. later loads of the chunk should -- // catch what we miss here. -- this.theLightEngine.checkChunkEdges(chunkPos.x, chunkPos.z); -- } -- -- this.chunkMap.releaseLightTicket(chunkPos); -- return chunk; -- }, (runnable) -> { -- this.theLightEngine.scheduleChunkLight(chunkPos, runnable); -- this.tryScheduleUpdate(); -- }).whenComplete((final ChunkAccess c, final Throwable throwable) -> { -- if (throwable != null) { -- LOGGER.error("Failed to light chunk " + chunkPos, throwable); -- } -- }); -- } -- // Paper end - replace light engine impl -- ChunkPos chunkPos = chunk.getPos(); -- chunk.setLightCorrect(false); -- this.addTask(chunkPos.x, chunkPos.z, ThreadedLevelLightEngine.TaskType.PRE_UPDATE, Util.name(() -> { -- if (!excludeBlocks) { -- super.propagateLightSources(chunkPos); -- } -- }, () -> "lightChunk " + chunkPos + " " + excludeBlocks)); -- return CompletableFuture.supplyAsync(() -> { -- chunk.setLightCorrect(true); -- this.chunkMap.releaseLightTicket(chunkPos); -- return chunk; -- }, task -> this.addTask(chunkPos.x, chunkPos.z, ThreadedLevelLightEngine.TaskType.POST_UPDATE, task)); -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - public void tryScheduleUpdate() { -- if (this.hasLightWork() && this.scheduled.compareAndSet(false, true)) { // Paper // Paper - rewrite light engine -- this.taskMailbox.tell(() -> { -- this.runUpdate(); -- this.scheduled.set(false); -- }); -- } -+ // Paper - rewrite chunk system - } - - private void runUpdate() { -- int i = Math.min(this.lightTasks.size(), 1000); -- ObjectListIterator> objectListIterator = this.lightTasks.iterator(); -- -- int j; -- for (j = 0; objectListIterator.hasNext() && j < i; j++) { -- Pair pair = objectListIterator.next(); -- if (pair.getFirst() == ThreadedLevelLightEngine.TaskType.PRE_UPDATE) { -- pair.getSecond().run(); -- } -- } -- -- objectListIterator.back(j); -- this.theLightEngine.propagateChanges(); // Paper - rewrite light engine -- -- for (int var5 = 0; objectListIterator.hasNext() && var5 < i; var5++) { -- Pair pair2 = objectListIterator.next(); -- if (pair2.getFirst() == ThreadedLevelLightEngine.TaskType.POST_UPDATE) { -- pair2.getSecond().run(); -- } -- -- objectListIterator.remove(); -- } -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - public CompletableFuture waitForPendingTasks(int x, int z) { -diff --git a/src/main/java/net/minecraft/server/level/Ticket.java b/src/main/java/net/minecraft/server/level/Ticket.java -index eba83b085435150e5954fd5d41dda9ce1d0601ad..e97329f867de2acbdd666925ba5d2aafa7a90574 100644 ---- a/src/main/java/net/minecraft/server/level/Ticket.java -+++ b/src/main/java/net/minecraft/server/level/Ticket.java -@@ -6,9 +6,12 @@ public final class Ticket implements Comparable> { - private final TicketType type; - private final int ticketLevel; - public final T key; -- private long createdTick; -+ // Paper start - rewrite chunk system -+ public long removeDelay; - -- protected Ticket(TicketType type, int level, T argument) { -+ public Ticket(TicketType type, int level, T argument, long removeDelay) { -+ this.removeDelay = removeDelay; -+ // Paper end - rewrite chunk system - this.type = type; - this.ticketLevel = level; - this.key = argument; -@@ -41,7 +44,7 @@ public final class Ticket implements Comparable> { - - @Override - public String toString() { -- return "Ticket[" + this.type + " " + this.ticketLevel + " (" + this.key + ")] at " + this.createdTick; -+ return "Ticket[" + this.type + " " + this.ticketLevel + " (" + this.key + ")] to die in " + this.removeDelay; // Paper - rewrite chunk system - } - - public TicketType getType() { -@@ -53,11 +56,10 @@ public final class Ticket implements Comparable> { - } - - protected void setCreatedTick(long tickCreated) { -- this.createdTick = tickCreated; -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - protected boolean timedOut(long currentTick) { -- long l = this.type.timeout(); -- return l != 0L && currentTick - this.createdTick > l; -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - } -diff --git a/src/main/java/net/minecraft/server/level/TicketType.java b/src/main/java/net/minecraft/server/level/TicketType.java -index 6051e5f272838ef23276a90e21c2fc821ca155d1..658e63ebde81dc14c8ab5850fb246dc0aab25dea 100644 ---- a/src/main/java/net/minecraft/server/level/TicketType.java -+++ b/src/main/java/net/minecraft/server/level/TicketType.java -@@ -8,6 +8,7 @@ import net.minecraft.world.level.ChunkPos; - - public class TicketType { - public static final TicketType FUTURE_AWAIT = create("future_await", Long::compareTo); // Paper -+ public static final TicketType ASYNC_LOAD = create("async_load", Long::compareTo); // Paper - - private final String name; - private final Comparator comparator; -@@ -27,6 +28,15 @@ public class TicketType { - public static final TicketType PLUGIN = TicketType.create("plugin", (a, b) -> 0); // CraftBukkit - public static final TicketType PLUGIN_TICKET = TicketType.create("plugin_ticket", (plugin1, plugin2) -> plugin1.getClass().getName().compareTo(plugin2.getClass().getName())); // CraftBukkit - public static final TicketType CHUNK_RELIGHT = create("light_update", Long::compareTo); // Paper - ensure chunks stay loaded for lighting -+ // Paper start - rewrite chunk system -+ public static final TicketType CHUNK_LOAD = create("chunk_load", Long::compareTo); -+ public static final TicketType STATUS_UPGRADE = create("status_upgrade", Long::compareTo); -+ public static final TicketType ENTITY_LOAD = create("entity_load", Long::compareTo); -+ public static final TicketType POI_LOAD = create("poi_load", Long::compareTo); -+ public static final TicketType UNLOAD_COOLDOWN = create("unload_cooldown", (u1, u2) -> 0, 5 * 20); -+ public static final TicketType NON_FULL_SYNC_LOAD = create("non_full_sync_load", Long::compareTo); -+ public static final TicketType DELAY_UNLOAD = create("delay_unload", Comparator.comparingLong(ChunkPos::toLong), 1); -+ // Paper end - rewrite chunk system - - public static TicketType create(String name, Comparator argumentComparator) { - return new TicketType<>(name, argumentComparator, 0L); -diff --git a/src/main/java/net/minecraft/server/level/WorldGenRegion.java b/src/main/java/net/minecraft/server/level/WorldGenRegion.java -index abbd4140cb4478a34a5185d8555f83d96c04d468..a6c31a558794a6e626e83176a1cbe78b6bd90f6e 100644 ---- a/src/main/java/net/minecraft/server/level/WorldGenRegion.java -+++ b/src/main/java/net/minecraft/server/level/WorldGenRegion.java -@@ -554,4 +554,21 @@ public class WorldGenRegion implements WorldGenLevel { - public long nextSubTickCount() { - return this.subTickCount.getAndIncrement(); - } -+ -+ // Paper start -+ // No-op, this class doesn't provide entity access -+ @Override -+ public List getHardCollidingEntities(Entity except, AABB box, Predicate predicate) { -+ return Collections.emptyList(); -+ } -+ -+ @Override -+ public void getEntities(Entity except, AABB box, Predicate predicate, List into) {} -+ -+ @Override -+ public void getHardCollidingEntities(Entity except, AABB box, Predicate predicate, List into) {} -+ -+ @Override -+ public void getEntitiesByClass(Class clazz, Entity except, AABB box, List into, Predicate predicate) {} -+ // Paper end - } -diff --git a/src/main/java/net/minecraft/server/network/PlayerChunkSender.java b/src/main/java/net/minecraft/server/network/PlayerChunkSender.java -index c502d9b85eb68b277ae17dfea34e0475f0156647..27d0f1ed58948039004f8f1eba2f7f9609fdeec0 100644 ---- a/src/main/java/net/minecraft/server/network/PlayerChunkSender.java -+++ b/src/main/java/net/minecraft/server/network/PlayerChunkSender.java -@@ -43,16 +43,23 @@ public class PlayerChunkSender { - - public void dropChunk(ServerPlayer player, ChunkPos pos) { - if (!this.pendingChunks.remove(pos.toLong()) && player.isAlive()) { -+ // Paper start - rewrite player chunk loader -+ dropChunkStatic(player, pos); -+ } -+ } -+ public static void dropChunkStatic(ServerPlayer player, ChunkPos pos) { -+ player.serverLevel().chunkSource.chunkMap.getVisibleChunkIfPresent(pos.toLong()).removePlayer(player); - player.connection.send(new ClientboundForgetLevelChunkPacket(pos)); - // Paper start - PlayerChunkUnloadEvent - if (io.papermc.paper.event.packet.PlayerChunkUnloadEvent.getHandlerList().getRegisteredListeners().length > 0) { - new io.papermc.paper.event.packet.PlayerChunkUnloadEvent(player.getBukkitEntity().getWorld().getChunkAt(pos.longKey), player.getBukkitEntity()).callEvent(); - } - // Paper end - PlayerChunkUnloadEvent -- } - } -+ // Paper end - rewrite player chunk loader - - public void sendNextChunks(ServerPlayer player) { -+ if (true) return; // Paper - rewrite player chunk loader - if (this.unacknowledgedBatches < this.maxUnacknowledgedBatches) { - float f = Math.max(1.0F, this.desiredChunksPerTick); - this.batchQuota = Math.min(this.batchQuota + this.desiredChunksPerTick, f); -@@ -78,7 +85,8 @@ public class PlayerChunkSender { - } - } - -- private static void sendChunk(ServerGamePacketListenerImpl handler, ServerLevel world, LevelChunk chunk) { -+ public static void sendChunk(ServerGamePacketListenerImpl handler, ServerLevel world, LevelChunk chunk) { // Paper - rewrite chunk loader - public -+ handler.player.serverLevel().chunkSource.chunkMap.getVisibleChunkIfPresent(chunk.getPos().toLong()).addPlayer(handler.player); - handler.send(new ClientboundLevelChunkWithLightPacket(chunk, world.getLightEngine(), null, null)); - // Paper start - PlayerChunkLoadEvent - if (io.papermc.paper.event.packet.PlayerChunkLoadEvent.getHandlerList().getRegisteredListeners().length > 0) { -@@ -118,6 +126,7 @@ public class PlayerChunkSender { - } - - public void onChunkBatchReceivedByClient(float desiredBatchSize) { -+ if (true) return; // Paper - rewrite player chunk loader - this.unacknowledgedBatches--; - this.desiredChunksPerTick = Double.isNaN((double)desiredBatchSize) ? 0.01F : Mth.clamp(desiredBatchSize, 0.01F, 64.0F); - if (this.unacknowledgedBatches == 0) { -diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java -index 0aa28caa1254137c0bae8e213bd08c9a654f5335..c4b4e5f5c9366b241686e881cda34568a57b4877 100644 ---- a/src/main/java/net/minecraft/server/players/PlayerList.java -+++ b/src/main/java/net/minecraft/server/players/PlayerList.java -@@ -296,7 +296,7 @@ public abstract class PlayerList { - boolean flag2 = gamerules.getBoolean(GameRules.RULE_LIMITED_CRAFTING); - - // Spigot - view distance -- playerconnection.send(new ClientboundLoginPacket(player.getId(), worlddata.isHardcore(), this.server.levelKeys(), this.getMaxPlayers(), worldserver1.spigotConfig.viewDistance, worldserver1.spigotConfig.simulationDistance, flag1, !flag, flag2, player.createCommonSpawnInfo(worldserver1), this.server.enforceSecureProfile())); -+ playerconnection.send(new ClientboundLoginPacket(player.getId(), worlddata.isHardcore(), this.server.levelKeys(), this.getMaxPlayers(), worldserver1.getWorld().getSendViewDistance(), worldserver1.getWorld().getSimulationDistance(), flag1, !flag, flag2, player.createCommonSpawnInfo(worldserver1), this.server.enforceSecureProfile())); // Paper - replace old player chunk management - player.getBukkitEntity().sendSupportedChannels(); // CraftBukkit - playerconnection.send(new ClientboundChangeDifficultyPacket(worlddata.getDifficulty(), worlddata.isDifficultyLocked())); - playerconnection.send(new ClientboundPlayerAbilitiesPacket(player.getAbilities())); -@@ -943,8 +943,8 @@ public abstract class PlayerList { - LevelData worlddata = worldserver2.getLevelData(); - - entityplayer1.connection.send(new ClientboundRespawnPacket(entityplayer1.createCommonSpawnInfo(worldserver2), (byte) i)); -- entityplayer1.connection.send(new ClientboundSetChunkCacheRadiusPacket(worldserver1.spigotConfig.viewDistance)); // Spigot -- entityplayer1.connection.send(new ClientboundSetSimulationDistancePacket(worldserver1.spigotConfig.simulationDistance)); // Spigot -+ entityplayer1.connection.send(new ClientboundSetChunkCacheRadiusPacket(worldserver1.getWorld().getSendViewDistance())); // Spigot // Paper - replace old player chunk management -+ entityplayer1.connection.send(new ClientboundSetSimulationDistancePacket(worldserver1.getWorld().getSimulationDistance())); // Spigot // Paper - replace old player chunk management - entityplayer1.connection.teleport(CraftLocation.toBukkit(entityplayer1.position(), worldserver2.getWorld(), entityplayer1.getYRot(), entityplayer1.getXRot())); // CraftBukkit - entityplayer1.connection.send(new ClientboundSetDefaultSpawnPositionPacket(worldserver1.getSharedSpawnPos(), worldserver1.getSharedSpawnAngle())); - entityplayer1.connection.send(new ClientboundChangeDifficultyPacket(worlddata.getDifficulty(), worlddata.isDifficultyLocked())); -@@ -1496,7 +1496,7 @@ public abstract class PlayerList { - - public void setViewDistance(int viewDistance) { - this.viewDistance = viewDistance; -- this.broadcastAll(new ClientboundSetChunkCacheRadiusPacket(viewDistance)); -+ //this.broadcastAll(new ClientboundSetChunkCacheRadiusPacket(viewDistance)); // Paper - move into setViewDistance - Iterator iterator = this.server.getAllLevels().iterator(); - - while (iterator.hasNext()) { -@@ -1511,7 +1511,7 @@ public abstract class PlayerList { - - public void setSimulationDistance(int simulationDistance) { - this.simulationDistance = simulationDistance; -- this.broadcastAll(new ClientboundSetSimulationDistancePacket(simulationDistance)); -+ //this.broadcastAll(new ClientboundSetSimulationDistancePacket(simulationDistance)); // Paper - handled by playerchunkloader - Iterator iterator = this.server.getAllLevels().iterator(); - - while (iterator.hasNext()) { -diff --git a/src/main/java/net/minecraft/util/SortedArraySet.java b/src/main/java/net/minecraft/util/SortedArraySet.java -index ea72dcb064a35bc6245bc5c94d592efedd8faf41..0793dfe47e68a2b48b010aad5b12dcfa1701293a 100644 ---- a/src/main/java/net/minecraft/util/SortedArraySet.java -+++ b/src/main/java/net/minecraft/util/SortedArraySet.java -@@ -14,6 +14,14 @@ public class SortedArraySet extends AbstractSet { - T[] contents; - int size; - -+ // Paper start - rewrite chunk system -+ public SortedArraySet(final SortedArraySet other) { -+ this.comparator = other.comparator; -+ this.size = other.size; -+ this.contents = Arrays.copyOf(other.contents, this.size); -+ } -+ // Paper end - rewrite chunk system -+ - private SortedArraySet(int initialCapacity, Comparator comparator) { - this.comparator = comparator; - if (initialCapacity < 0) { -@@ -22,6 +30,41 @@ public class SortedArraySet extends AbstractSet { - this.contents = (T[])castRawArray(new Object[initialCapacity]); - } - } -+ // Paper start - optimise removeIf -+ @Override -+ public boolean removeIf(java.util.function.Predicate filter) { -+ // prev. impl used an iterator, which could be n^2 and creates garbage -+ int i = 0, len = this.size; -+ T[] backingArray = this.contents; -+ -+ for (;;) { -+ if (i >= len) { -+ return false; -+ } -+ if (!filter.test(backingArray[i])) { -+ ++i; -+ continue; -+ } -+ break; -+ } -+ -+ // we only want to write back to backingArray if we really need to -+ -+ int lastIndex = i; // this is where new elements are shifted to -+ -+ for (; i < len; ++i) { -+ T curr = backingArray[i]; -+ if (!filter.test(curr)) { // if test throws we're screwed -+ backingArray[lastIndex++] = curr; -+ } -+ } -+ -+ // cleanup end -+ Arrays.fill(backingArray, lastIndex, len, null); -+ this.size = lastIndex; -+ return true; -+ } -+ // Paper end - optimise removeIf - - public static > SortedArraySet create() { - return create(10); -@@ -110,6 +153,31 @@ public class SortedArraySet extends AbstractSet { - } - } - -+ // Paper start - rewrite chunk system -+ public T replace(T object) { -+ int i = this.findIndex(object); -+ if (i >= 0) { -+ T old = this.contents[i]; -+ this.contents[i] = object; -+ return old; -+ } else { -+ this.addInternal(object, getInsertionPosition(i)); -+ return object; -+ } -+ } -+ -+ public T removeAndGet(T object) { -+ int i = this.findIndex(object); -+ if (i >= 0) { -+ final T ret = this.contents[i]; -+ this.removeInternal(i); -+ return ret; -+ } else { -+ return null; -+ } -+ } -+ // Paper end - rewrite chunk system -+ - @Override - public boolean remove(Object object) { - int i = this.findIndex((T)object); -diff --git a/src/main/java/net/minecraft/util/worldupdate/WorldUpgrader.java b/src/main/java/net/minecraft/util/worldupdate/WorldUpgrader.java -index 0382b6597a130d746f8954a93a756a9d1ac81d50..ffbb3bf9ff3fc968ef69d4f889b0baf7e8ab691b 100644 ---- a/src/main/java/net/minecraft/util/worldupdate/WorldUpgrader.java -+++ b/src/main/java/net/minecraft/util/worldupdate/WorldUpgrader.java -@@ -227,7 +227,13 @@ public class WorldUpgrader { - this.previousWriteFuture.join(); - } - -+ // Paper start - async chunk io -+ try { - this.previousWriteFuture = storage.write(chunkPos, nbttagcompound1); -+ } catch (final IOException e) { -+ com.destroystokyo.paper.util.SneakyThrow.sneaky(e); -+ } -+ // Paper end - async chunk io - return true; - } - } -diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java -index 62363c09111aaa31220fb260940744c097af7b3c..ff497f0e80889508dd8c183b48cd33bc7831ba6c 100644 ---- a/src/main/java/net/minecraft/world/entity/Entity.java -+++ b/src/main/java/net/minecraft/world/entity/Entity.java -@@ -481,6 +481,58 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess - } - // Paper end - -+ // Paper start -+ /** -+ * Overriding this field will cause memory leaks. -+ */ -+ private final boolean hardCollides; -+ -+ private static final java.util.Map, Boolean> cachedOverrides = java.util.Collections.synchronizedMap(new java.util.WeakHashMap<>()); -+ { -+ /* // Goodbye, broken on reobf... -+ Boolean hardCollides = cachedOverrides.get(this.getClass()); -+ if (hardCollides == null) { -+ try { -+ java.lang.reflect.Method getHardCollisionBoxEntityMethod = Entity.class.getMethod("canCollideWith", Entity.class); -+ java.lang.reflect.Method hasHardCollisionBoxMethod = Entity.class.getMethod("canBeCollidedWith"); -+ if (!this.getClass().getMethod(hasHardCollisionBoxMethod.getName(), hasHardCollisionBoxMethod.getParameterTypes()).equals(hasHardCollisionBoxMethod) -+ || !this.getClass().getMethod(getHardCollisionBoxEntityMethod.getName(), getHardCollisionBoxEntityMethod.getParameterTypes()).equals(getHardCollisionBoxEntityMethod)) { -+ hardCollides = Boolean.TRUE; -+ } else { -+ hardCollides = Boolean.FALSE; -+ } -+ cachedOverrides.put(this.getClass(), hardCollides); -+ } -+ catch (ThreadDeath thr) { throw thr; } -+ catch (Throwable thr) { -+ // shouldn't happen, just explode -+ throw new RuntimeException(thr); -+ } -+ } */ -+ this.hardCollides = this instanceof Boat -+ || this instanceof net.minecraft.world.entity.monster.Shulker -+ || this instanceof net.minecraft.world.entity.vehicle.AbstractMinecart -+ || this.shouldHardCollide(); -+ } -+ -+ // plugins can override -+ protected boolean shouldHardCollide() { -+ return false; -+ } -+ -+ public final boolean hardCollides() { -+ return this.hardCollides; -+ } -+ -+ public net.minecraft.server.level.FullChunkStatus chunkStatus; -+ -+ public int sectionX = Integer.MIN_VALUE; -+ public int sectionY = Integer.MIN_VALUE; -+ public int sectionZ = Integer.MIN_VALUE; -+ -+ public boolean updatingSectionStatus = false; -+ // Paper end -+ - public Entity(EntityType type, Level world) { - this.id = Entity.ENTITY_COUNTER.incrementAndGet(); - this.passengers = ImmutableList.of(); -@@ -2607,11 +2659,11 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess - return InteractionResult.PASS; - } - -- public boolean canCollideWith(Entity other) { -+ public boolean canCollideWith(Entity other) { // Paper - diff on change, hard colliding entities override this - TODO CHECK ON UPDATE - AbstractMinecart/Boat override - return other.canBeCollidedWith() && !this.isPassengerOfSameVehicle(other); - } - -- public boolean canBeCollidedWith() { -+ public boolean canBeCollidedWith() { // Paper - diff on change, hard colliding entities override this TODO CHECK ON UPDATE - Boat/Shulker override - return false; - } - -@@ -4042,6 +4094,13 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess - }).count(); - } - -+ // Paper start - rewrite chunk system -+ public boolean hasAnyPlayerPassengers() { -+ // copied from below -+ if (this.passengers.isEmpty()) { return false; } -+ return this.getIndirectPassengersStream().anyMatch((entity) -> entity instanceof Player); -+ } -+ // Paper end - rewrite chunk system - public boolean hasExactlyOnePlayerPassenger() { - if (this.passengers.isEmpty()) { return false; } // Paper - Optimize indirect passenger iteration - return this.countPlayerPassengers() == 1; -@@ -4392,6 +4451,12 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess - return; - } - // Paper end - Block invalid positions and bounding box -+ // Paper start - rewrite chunk system -+ if (this.updatingSectionStatus) { -+ LOGGER.error("Refusing to update position for entity {} to position {} since it is processing a section status update", this, new Vec3(x, y, z), new Throwable()); -+ return; -+ } -+ // Paper end - rewrite chunk system - // Paper start - Fix MC-4 - if (this instanceof ItemEntity) { - if (io.papermc.paper.configuration.GlobalConfiguration.get().misc.fixEntityPositionDesync) { -@@ -4519,6 +4584,13 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess - - @Override - public final void setRemoved(Entity.RemovalReason entity_removalreason, EntityRemoveEvent.Cause cause) { -+ // Paper start - rewrite chunk system -+ io.papermc.paper.util.TickThread.ensureTickThread(this, "Cannot remove entity off-main"); -+ if (!((ServerLevel)this.level).getEntityLookup().canRemoveEntity(this)) { -+ LOGGER.warn("Entity " + this + " is currently prevented from being removed from the world since it is processing section status updates", new Throwable()); -+ return; -+ } -+ // Paper end - rewrite chunk system - CraftEventFactory.callEntityRemoveEvent(this, cause); - // CraftBukkit end - final boolean alreadyRemoved = this.removalReason != null; // Paper - Folia schedulers -@@ -4530,7 +4602,7 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess - this.stopRiding(); - } - -- this.getPassengers().forEach(Entity::stopRiding); -+ if (entity_removalreason != RemovalReason.UNLOADED_TO_CHUNK) this.getPassengers().forEach(Entity::stopRiding); // Paper - chunk system - don't adjust passenger state when unloading, it's just not safe (and messes with our logic in entity chunk unload) - this.levelCallback.onRemove(entity_removalreason); - // Paper start - Folia schedulers - if (!(this instanceof ServerPlayer) && entity_removalreason != RemovalReason.CHANGED_DIMENSION && !alreadyRemoved) { -@@ -4561,7 +4633,7 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess - - @Override - public boolean shouldBeSaved() { -- return this.removalReason != null && !this.removalReason.shouldSave() ? false : (this.isPassenger() ? false : !this.isVehicle() || !this.hasExactlyOnePlayerPassenger()); -+ return this.removalReason != null && !this.removalReason.shouldSave() ? false : (this.isPassenger() ? false : !this.isVehicle() || !this.hasAnyPlayerPassengers()); // Paper - rewrite chunk system - it should check if the entity has ANY player passengers - } - - @Override -diff --git a/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiManager.java b/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiManager.java -index 71d8909f35a22256406a2232d21adfd7d94dc3a5..7b52b0507cbda76aee1db954641f397bef51f94d 100644 ---- a/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiManager.java -+++ b/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiManager.java -@@ -40,20 +40,40 @@ import net.minecraft.world.level.chunk.storage.SimpleRegionStorage; - public class PoiManager extends SectionStorage { - public static final int MAX_VILLAGE_DISTANCE = 6; - public static final int VILLAGE_SECTION_SIZE = 1; -- private final PoiManager.DistanceTracker distanceTracker; -- private final LongSet loadedChunks = new LongOpenHashSet(); -+ // Paper start - rewrite chunk system -+ // the vanilla tracker needs to be replaced because it does not support level removes -+ public final net.minecraft.server.level.ServerLevel world; -+ private final io.papermc.paper.util.misc.Delayed26WayDistancePropagator3D villageDistanceTracker = new io.papermc.paper.util.misc.Delayed26WayDistancePropagator3D(); -+ static final int POI_DATA_SOURCE = 7; -+ public static int convertBetweenLevels(final int level) { -+ return POI_DATA_SOURCE - level; -+ } -+ -+ protected void updateDistanceTracking(long section) { -+ if (this.isVillageCenter(section)) { -+ this.villageDistanceTracker.setSource(section, POI_DATA_SOURCE); -+ } else { -+ this.villageDistanceTracker.removeSource(section); -+ } -+ } -+ // Paper end - rewrite chunk system - - public PoiManager( - RegionStorageInfo storageKey, Path directory, DataFixer dataFixer, boolean dsync, RegistryAccess registryManager, LevelHeightAccessor world - ) { - super( -+ // Paper start -+ storageKey, -+ directory, -+ dsync, -+ // Paper end - new SimpleRegionStorage(storageKey, directory, dataFixer, dsync, DataFixTypes.POI_CHUNK), - PoiSection::codec, - PoiSection::new, - registryManager, - world - ); -- this.distanceTracker = new PoiManager.DistanceTracker(); -+ this.world = (net.minecraft.server.level.ServerLevel)world; // Paper - rewrite chunk system - } - - public void add(BlockPos pos, Holder type) { -@@ -187,8 +207,8 @@ public class PoiManager extends SectionStorage { - } - - public int sectionsToVillage(SectionPos pos) { -- this.distanceTracker.runAllUpdates(); -- return this.distanceTracker.getLevel(pos.asLong()); -+ this.villageDistanceTracker.propagateUpdates(); // Paper - replace distance tracking util -+ return convertBetweenLevels(this.villageDistanceTracker.getLevel(io.papermc.paper.util.CoordinateUtils.getChunkSectionKey(pos))); // Paper - replace distance tracking util - } - - boolean isVillageCenter(long pos) { -@@ -202,20 +222,117 @@ public class PoiManager extends SectionStorage { - - @Override - public void tick(BooleanSupplier shouldKeepTicking) { -- super.tick(shouldKeepTicking); -- this.distanceTracker.runAllUpdates(); -+ this.villageDistanceTracker.propagateUpdates(); // Paper - rewrite chunk system - } - - @Override -- protected void setDirty(long pos) { -- super.setDirty(pos); -- this.distanceTracker.update(pos, this.distanceTracker.getLevelFromSource(pos), false); -+ public void setDirty(long pos) { -+ // Paper start - rewrite chunk system -+ int chunkX = io.papermc.paper.util.CoordinateUtils.getChunkSectionX(pos); -+ int chunkZ = io.papermc.paper.util.CoordinateUtils.getChunkSectionZ(pos); -+ io.papermc.paper.chunk.system.scheduling.ChunkHolderManager manager = this.world.chunkTaskScheduler.chunkHolderManager; -+ io.papermc.paper.chunk.system.poi.PoiChunk chunk = manager.getPoiChunkIfLoaded(chunkX, chunkZ, false); -+ if (chunk != null) { -+ chunk.setDirty(true); -+ } -+ this.updateDistanceTracking(pos); -+ // Paper end - rewrite chunk system - } - - @Override - protected void onSectionLoad(long pos) { -- this.distanceTracker.update(pos, this.distanceTracker.getLevelFromSource(pos), false); -+ this.updateDistanceTracking(pos); // Paper - move to new distance tracking util -+ } -+ -+ // Paper start - rewrite chunk system -+ @Override -+ public Optional get(long pos) { -+ int chunkX = io.papermc.paper.util.CoordinateUtils.getChunkSectionX(pos); -+ int chunkY = io.papermc.paper.util.CoordinateUtils.getChunkSectionY(pos); -+ int chunkZ = io.papermc.paper.util.CoordinateUtils.getChunkSectionZ(pos); -+ -+ io.papermc.paper.util.TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Accessing poi chunk off-main"); -+ -+ io.papermc.paper.chunk.system.scheduling.ChunkHolderManager manager = this.world.chunkTaskScheduler.chunkHolderManager; -+ io.papermc.paper.chunk.system.poi.PoiChunk ret = manager.getPoiChunkIfLoaded(chunkX, chunkZ, true); -+ -+ return ret == null ? Optional.empty() : ret.getSectionForVanilla(chunkY); -+ } -+ -+ @Override -+ public Optional getOrLoad(long pos) { -+ int chunkX = io.papermc.paper.util.CoordinateUtils.getChunkSectionX(pos); -+ int chunkY = io.papermc.paper.util.CoordinateUtils.getChunkSectionY(pos); -+ int chunkZ = io.papermc.paper.util.CoordinateUtils.getChunkSectionZ(pos); -+ -+ io.papermc.paper.util.TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Accessing poi chunk off-main"); -+ -+ io.papermc.paper.chunk.system.scheduling.ChunkHolderManager manager = this.world.chunkTaskScheduler.chunkHolderManager; -+ -+ if (chunkY >= io.papermc.paper.util.WorldUtil.getMinSection(this.world) && -+ chunkY <= io.papermc.paper.util.WorldUtil.getMaxSection(this.world)) { -+ io.papermc.paper.chunk.system.poi.PoiChunk ret = manager.getPoiChunkIfLoaded(chunkX, chunkZ, true); -+ if (ret != null) { -+ return ret.getSectionForVanilla(chunkY); -+ } else { -+ return manager.loadPoiChunk(chunkX, chunkZ).getSectionForVanilla(chunkY); -+ } -+ } -+ // retain vanilla behavior: do not load section if out of bounds! -+ return Optional.empty(); -+ } -+ -+ @Override -+ protected PoiSection getOrCreate(long pos) { -+ int chunkX = io.papermc.paper.util.CoordinateUtils.getChunkSectionX(pos); -+ int chunkY = io.papermc.paper.util.CoordinateUtils.getChunkSectionY(pos); -+ int chunkZ = io.papermc.paper.util.CoordinateUtils.getChunkSectionZ(pos); -+ -+ io.papermc.paper.util.TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Accessing poi chunk off-main"); -+ -+ io.papermc.paper.chunk.system.scheduling.ChunkHolderManager manager = this.world.chunkTaskScheduler.chunkHolderManager; -+ -+ io.papermc.paper.chunk.system.poi.PoiChunk ret = manager.getPoiChunkIfLoaded(chunkX, chunkZ, true); -+ if (ret != null) { -+ return ret.getOrCreateSection(chunkY); -+ } else { -+ return manager.loadPoiChunk(chunkX, chunkZ).getOrCreateSection(chunkY); -+ } -+ } -+ -+ public void onUnload(long coordinate) { // Paper - rewrite chunk system -+ int chunkX = io.papermc.paper.util.MCUtil.getCoordinateX(coordinate); -+ int chunkZ = io.papermc.paper.util.MCUtil.getCoordinateZ(coordinate); -+ io.papermc.paper.util.TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Unloading poi chunk off-main"); -+ for (int section = this.levelHeightAccessor.getMinSection(); section < this.levelHeightAccessor.getMaxSection(); ++section) { -+ long sectionPos = SectionPos.asLong(chunkX, section, chunkZ); -+ this.updateDistanceTracking(sectionPos); -+ } -+ } -+ -+ public void loadInPoiChunk(io.papermc.paper.chunk.system.poi.PoiChunk poiChunk) { -+ int chunkX = poiChunk.chunkX; -+ int chunkZ = poiChunk.chunkZ; -+ io.papermc.paper.util.TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Loading poi chunk off-main"); -+ for (int sectionY = this.levelHeightAccessor.getMinSection(); sectionY < this.levelHeightAccessor.getMaxSection(); ++sectionY) { -+ PoiSection section = poiChunk.getSection(sectionY); -+ if (section != null && !section.isEmpty()) { -+ this.onSectionLoad(SectionPos.asLong(chunkX, sectionY, chunkZ)); -+ } -+ } -+ } -+ -+ public void checkConsistency(net.minecraft.world.level.chunk.ChunkAccess chunk) { -+ int chunkX = chunk.getPos().x; -+ int chunkZ = chunk.getPos().z; -+ int minY = io.papermc.paper.util.WorldUtil.getMinSection(chunk); -+ int maxY = io.papermc.paper.util.WorldUtil.getMaxSection(chunk); -+ LevelChunkSection[] sections = chunk.getSections(); -+ for (int section = minY; section <= maxY; ++section) { -+ this.checkConsistencyWithBlocks(SectionPos.of(chunkX, section, chunkZ), sections[section - minY]); -+ } - } -+ // Paper end - rewrite chunk system - - public void checkConsistencyWithBlocks(SectionPos sectionPos, LevelChunkSection chunkSection) { - Util.ifElse(this.getOrLoad(sectionPos.asLong()), poiSet -> poiSet.refresh(populator -> { -@@ -251,7 +368,7 @@ public class PoiManager extends SectionStorage { - .map(sectionPos -> Pair.of(sectionPos, this.getOrLoad(sectionPos.asLong()))) - .filter(pair -> !pair.getSecond().map(PoiSection::isValid).orElse(false)) - .map(pair -> pair.getFirst().chunk()) -- .filter(chunkPos -> this.loadedChunks.add(chunkPos.toLong())) -+ // Paper - rewrite chunk system - .forEach(chunkPos -> world.getChunk(chunkPos.x, chunkPos.z, ChunkStatus.EMPTY)); - } - -@@ -265,7 +382,7 @@ public class PoiManager extends SectionStorage { - - @Override - protected int getLevelFromSource(long id) { -- return PoiManager.this.isVillageCenter(id) ? 0 : 7; -+ return PoiManager.this.isVillageCenter(id) ? 0 : 7; // Paper - rewrite chunk system - diff on change, this specifies the source level to use for distance tracking - } - - @Override -@@ -287,6 +404,35 @@ public class PoiManager extends SectionStorage { - } - } - -+ // Paper start - Asynchronous chunk io -+ @javax.annotation.Nullable -+ @Override -+ public net.minecraft.nbt.CompoundTag read(ChunkPos chunkcoordintpair) throws java.io.IOException { -+ // Paper start - rewrite chunk system -+ if (!io.papermc.paper.chunk.system.io.RegionFileIOThread.isRegionFileThread()) { -+ return io.papermc.paper.chunk.system.io.RegionFileIOThread.loadData( -+ this.world, chunkcoordintpair.x, chunkcoordintpair.z, io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.POI_DATA, -+ io.papermc.paper.chunk.system.io.RegionFileIOThread.getIOBlockingPriorityForCurrentThread() -+ ); -+ } -+ // Paper end - rewrite chunk system -+ return super.read(chunkcoordintpair); -+ } -+ -+ @Override -+ public void write(ChunkPos chunkcoordintpair, net.minecraft.nbt.CompoundTag nbttagcompound) throws java.io.IOException { -+ // Paper start - rewrite chunk system -+ if (!io.papermc.paper.chunk.system.io.RegionFileIOThread.isRegionFileThread()) { -+ io.papermc.paper.chunk.system.io.RegionFileIOThread.scheduleSave( -+ this.world, chunkcoordintpair.x, chunkcoordintpair.z, nbttagcompound, -+ io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.POI_DATA); -+ return; -+ } -+ // Paper end - rewrite chunk system -+ super.write(chunkcoordintpair, nbttagcompound); -+ } -+ // Paper end -+ - public static enum Occupancy { - HAS_SPACE(PoiRecord::hasSpace), - IS_OCCUPIED(PoiRecord::isOccupied), -diff --git a/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiSection.java b/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiSection.java -index 971fb29a2c3dc713cb8ab1d2eed054cc16f9c93c..5b7deae326228e482b218aeebd857a59b7434eaf 100644 ---- a/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiSection.java -+++ b/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiSection.java -@@ -29,6 +29,7 @@ public class PoiSection { - private final Map, Set> byType = Maps.newHashMap(); - private final Runnable setDirty; - private boolean isValid; -+ public final Optional noAllocateOptional = Optional.of(this); // Paper - rewrite chunk system - - public static Codec codec(Runnable updateListener) { - return RecordCodecBuilder.create( -@@ -46,6 +47,12 @@ public class PoiSection { - this(updateListener, true, ImmutableList.of()); - } - -+ // Paper start - isEmpty -+ public boolean isEmpty() { -+ return this.isValid && this.records.isEmpty() && this.byType.isEmpty(); -+ } -+ // Paper end -+ - private PoiSection(Runnable updateListener, boolean valid, List pois) { - this.setDirty = updateListener; - this.isValid = valid; -diff --git a/src/main/java/net/minecraft/world/level/EntityGetter.java b/src/main/java/net/minecraft/world/level/EntityGetter.java -index bd20bea7f76a7307f1698fb2dfef37125032d166..9a28912f52824acdc80a62243b136e6f365bf567 100644 ---- a/src/main/java/net/minecraft/world/level/EntityGetter.java -+++ b/src/main/java/net/minecraft/world/level/EntityGetter.java -@@ -19,6 +19,18 @@ import net.minecraft.world.phys.shapes.Shapes; - import net.minecraft.world.phys.shapes.VoxelShape; - - public interface EntityGetter { -+ -+ // Paper start -+ List getHardCollidingEntities(Entity except, AABB box, Predicate predicate); -+ -+ void getEntities(Entity except, AABB box, Predicate predicate, List into); -+ -+ void getHardCollidingEntities(Entity except, AABB box, Predicate predicate, List into); -+ -+ void getEntitiesByClass(Class clazz, Entity except, final AABB box, List into, -+ Predicate predicate); -+ // Paper end -+ - List getEntities(@Nullable Entity except, AABB box, Predicate predicate); - - List getEntities(EntityTypeTest filter, AABB box, Predicate predicate); -diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java -index 975fcd4b8f93cb8c602ddeb165c485214eac10a4..d3137c9e5cc42ef191ea233b0d37eafeffc6f82c 100644 ---- a/src/main/java/net/minecraft/world/level/Level.java -+++ b/src/main/java/net/minecraft/world/level/Level.java -@@ -547,6 +547,11 @@ public abstract class Level implements LevelAccessor, AutoCloseable { - - if ((i & 2) != 0 && (!this.isClientSide || (i & 4) == 0) && (this.isClientSide || chunk == null || (chunk.getFullStatus() != null && chunk.getFullStatus().isOrAfter(FullChunkStatus.BLOCK_TICKING)))) { // allow chunk to be null here as chunk.isReady() is false when we send our notification during block placement - this.sendBlockUpdated(blockposition, iblockdata1, iblockdata, i); -+ // Paper start - per player view distance - allow block updates for non-ticking chunks in player view distance -+ // if copied from above -+ } else if ((i & 2) != 0 && (!this.isClientSide || (i & 4) == 0)) { // Paper - replace old player chunk management -+ ((ServerLevel)this).getChunkSource().blockChanged(blockposition); -+ // Paper end - per player view distance - } - - if ((i & 1) != 0) { -@@ -941,7 +946,7 @@ public abstract class Level implements LevelAccessor, AutoCloseable { - } - // Paper end - Perf: Optimize capturedTileEntities lookup - // CraftBukkit end -- return this.isOutsideBuildHeight(blockposition) ? null : (!this.isClientSide && Thread.currentThread() != this.thread ? null : this.getChunkAt(blockposition).getBlockEntity(blockposition, LevelChunk.EntityCreationType.IMMEDIATE)); -+ return this.isOutsideBuildHeight(blockposition) ? null : (!this.isClientSide && !io.papermc.paper.util.TickThread.isTickThread() ? null : this.getChunkAt(blockposition).getBlockEntity(blockposition, LevelChunk.EntityCreationType.IMMEDIATE)); // Paper - rewrite chunk system - } - - public void setBlockEntity(BlockEntity blockEntity) { -@@ -1032,26 +1037,7 @@ public abstract class Level implements LevelAccessor, AutoCloseable { - public List getEntities(@Nullable Entity except, AABB box, Predicate predicate) { - this.getProfiler().incrementCounter("getEntities"); - List list = Lists.newArrayList(); -- -- this.getEntities().get(box, (entity1) -> { -- if (entity1 != except && predicate.test(entity1)) { -- list.add(entity1); -- } -- -- if (entity1 instanceof EnderDragon) { -- EnderDragonPart[] aentitycomplexpart = ((EnderDragon) entity1).getSubEntities(); -- int i = aentitycomplexpart.length; -- -- for (int j = 0; j < i; ++j) { -- EnderDragonPart entitycomplexpart = aentitycomplexpart[j]; -- -- if (entity1 != except && predicate.test(entitycomplexpart)) { -- list.add(entitycomplexpart); -- } -- } -- } -- -- }); -+ ((ServerLevel)this).getEntityLookup().getEntities(except, box, list, predicate); // Paper - optimise this call - return list; - } - -@@ -1069,33 +1055,23 @@ public abstract class Level implements LevelAccessor, AutoCloseable { - - public void getEntities(EntityTypeTest filter, AABB box, Predicate predicate, List result, int limit) { - this.getProfiler().incrementCounter("getEntities"); -- this.getEntities().get(filter, box, (entity) -> { -- if (predicate.test(entity)) { -- result.add(entity); -- if (result.size() >= limit) { -- return AbortableIterationConsumer.Continuation.ABORT; -- } -- } -- -- if (entity instanceof EnderDragon entityenderdragon) { -- EnderDragonPart[] aentitycomplexpart = entityenderdragon.getSubEntities(); -- int j = aentitycomplexpart.length; -- -- for (int k = 0; k < j; ++k) { -- EnderDragonPart entitycomplexpart = aentitycomplexpart[k]; -- T t0 = filter.tryCast(entitycomplexpart); // CraftBukkit - decompile error -- -- if (t0 != null && predicate.test(t0)) { -- result.add(t0); -- if (result.size() >= limit) { -- return AbortableIterationConsumer.Continuation.ABORT; -- } -- } -- } -+ // Paper start - optimise this call -+ //TODO use limit -+ if (filter instanceof net.minecraft.world.entity.EntityType entityTypeTest) { -+ ((ServerLevel) this).getEntityLookup().getEntities(entityTypeTest, box, result, predicate); -+ } else { -+ Predicate test = (obj) -> { -+ return filter.tryCast(obj) != null; -+ }; -+ predicate = predicate == null ? test : test.and((Predicate) predicate); -+ Class base; -+ if (filter == null || (base = filter.getBaseClass()) == null || base == Entity.class) { -+ ((ServerLevel) this).getEntityLookup().getEntities((Entity) null, box, (List) result, (Predicate)predicate); -+ } else { -+ ((ServerLevel) this).getEntityLookup().getEntities(base, null, box, (List) result, (Predicate)predicate); // Paper - optimise this call - } -- -- return AbortableIterationConsumer.Continuation.CONTINUE; -- }); -+ } -+ // Paper end - optimise this call - } - - @Nullable -@@ -1385,4 +1361,45 @@ public abstract class Level implements LevelAccessor, AutoCloseable { - } - } - // Paper end - notify observers even if grow failed -+ // Paper start -+ //protected final io.papermc.paper.world.EntitySliceManager entitySliceManager; // Paper - rewrite chunk system -+ -+ public org.bukkit.entity.Entity[] getChunkEntities(int chunkX, int chunkZ) { -+ io.papermc.paper.world.ChunkEntitySlices slices = ((ServerLevel)this).getEntityLookup().getChunk(chunkX, chunkZ); -+ if (slices == null) { -+ return new org.bukkit.entity.Entity[0]; -+ } -+ return slices.getChunkEntities(); -+ } -+ -+ @Override -+ public List getHardCollidingEntities(Entity except, AABB box, Predicate predicate) { -+ List ret = new java.util.ArrayList<>(); -+ ((ServerLevel)this).getEntityLookup().getHardCollidingEntities(except, box, ret, predicate); -+ return ret; -+ } -+ -+ @Override -+ public void getEntities(Entity except, AABB box, Predicate predicate, List into) { -+ ((ServerLevel)this).getEntityLookup().getEntities(except, box, into, predicate); -+ } -+ -+ @Override -+ public void getHardCollidingEntities(Entity except, AABB box, Predicate predicate, List into) { -+ ((ServerLevel)this).getEntityLookup().getHardCollidingEntities(except, box, into, predicate); -+ } -+ -+ @Override -+ public void getEntitiesByClass(Class clazz, Entity except, final AABB box, List into, -+ Predicate predicate) { -+ ((ServerLevel)this).getEntityLookup().getEntities((Class)clazz, except, box, (List)into, (Predicate)predicate); -+ } -+ -+ @Override -+ public List getEntitiesOfClass(Class entityClass, AABB box, Predicate predicate) { -+ List ret = new java.util.ArrayList<>(); -+ ((ServerLevel)this).getEntityLookup().getEntities(entityClass, null, box, ret, predicate); -+ return ret; -+ } -+ // Paper end - } -diff --git a/src/main/java/net/minecraft/world/level/LevelReader.java b/src/main/java/net/minecraft/world/level/LevelReader.java -index a0ae26d6197e1069ca09982b4f8b706c55ae8491..32bfeb9aa87b43a9d2ce46dcc99dbd0ff355b412 100644 ---- a/src/main/java/net/minecraft/world/level/LevelReader.java -+++ b/src/main/java/net/minecraft/world/level/LevelReader.java -@@ -26,6 +26,15 @@ public interface LevelReader extends BlockAndTintGetter, CollisionGetter, Signal - @Nullable - ChunkAccess getChunk(int chunkX, int chunkZ, ChunkStatus leastStatus, boolean create); - -+ // Paper start - rewrite chunk system -+ default ChunkAccess syncLoadNonFull(int chunkX, int chunkZ, ChunkStatus status) { -+ if (status == null || status.isOrAfter(ChunkStatus.FULL)) { -+ throw new IllegalArgumentException("Status: " + status.toString()); -+ } -+ return this.getChunk(chunkX, chunkZ, status, true); -+ } -+ // Paper end - rewrite chunk system -+ - @Nullable ChunkAccess getChunkIfLoadedImmediately(int x, int z); // Paper - ifLoaded api (we need this since current impl blocks if the chunk is loading) - @Nullable default ChunkAccess getChunkIfLoadedImmediately(BlockPos pos) { return this.getChunkIfLoadedImmediately(pos.getX() >> 4, pos.getZ() >> 4);} - -diff --git a/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java b/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java -index c9cd18ce79a6ee7297a8fd14f4dbe712570b3ced..927bdebdb8ae01613f0cea074b3367bd7ffe9ab1 100644 ---- a/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java -+++ b/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java -@@ -120,7 +120,7 @@ public abstract class ChunkGenerator { - return CompletableFuture.supplyAsync(Util.wrapThreadWithTaskName("init_biomes", () -> { - chunk.fillBiomesFromNoise(this.biomeSource, noiseConfig.sampler()); - return chunk; -- }), Util.backgroundExecutor()); -+ }), executor); // Paper - run with supplied executor - } - - public abstract void applyCarvers(WorldGenRegion chunkRegion, long seed, RandomState noiseConfig, BiomeManager biomeAccess, StructureManager structureAccessor, ChunkAccess chunk, GenerationStep.Carving carverStep); -@@ -315,7 +315,7 @@ public abstract class ChunkGenerator { - return Pair.of(placement.getLocatePos(pos), holder); - } - -- ChunkAccess ichunkaccess = world.getChunk(pos.x, pos.z, ChunkStatus.STRUCTURE_STARTS); -+ ChunkAccess ichunkaccess = world.syncLoadNonFull(pos.x, pos.z, ChunkStatus.STRUCTURE_STARTS); // Paper - rewrite chunk system - - structurestart = structureAccessor.getStartForStructure(SectionPos.bottomOf(ichunkaccess), (Structure) holder.value(), ichunkaccess); - } while (structurestart == null); -diff --git a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java -index bac191f92ea3735df19c68d5568c2c7962c8680f..5d94aee1303d9eca5f1fa9a2e033ad0d12909635 100644 ---- a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java -+++ b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java -@@ -86,6 +86,7 @@ public class LevelChunk extends ChunkAccess { - private final Int2ObjectMap gameEventListenerRegistrySections; - private final LevelChunkTicks blockTicks; - private final LevelChunkTicks fluidTicks; -+ public volatile FullChunkStatus chunkStatus = FullChunkStatus.INACCESSIBLE; // Paper - rewrite chunk system - - public LevelChunk(Level world, ChunkPos pos) { - this(world, pos, UpgradeData.EMPTY, new LevelChunkTicks<>(), new LevelChunkTicks<>(), 0L, (LevelChunkSection[]) null, (LevelChunk.PostLoadProcessor) null, (BlendingData) null); -@@ -690,9 +691,26 @@ public class LevelChunk extends ChunkAccess { - - } - -- // CraftBukkit start -- public void loadCallback() { -- // Paper start - neighbour cache -+ // Paper start - new load callbacks -+ private io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder; -+ public io.papermc.paper.chunk.system.scheduling.NewChunkHolder getChunkHolder() { -+ return this.chunkHolder; -+ } -+ -+ public void setChunkHolder(io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder) { -+ if (chunkHolder == null) { -+ throw new NullPointerException("Chunkholder cannot be null"); -+ } -+ if (this.chunkHolder != null) { -+ throw new IllegalStateException("Already have chunkholder: " + this.chunkHolder + ", cannot replace with " + chunkHolder); -+ } -+ this.chunkHolder = chunkHolder; -+ this.playerChunk = chunkHolder.vanillaChunkHolder; -+ } -+ -+ /* Note: We skip the light neighbour chunk loading done for the vanilla full chunk */ -+ /* Starlight does not need these chunks for lighting purposes because of edge checks */ -+ public void pushChunkIntoLoadedMap() { - int chunkX = this.chunkPos.x; - int chunkZ = this.chunkPos.z; - net.minecraft.server.level.ServerChunkCache chunkProvider = this.level.getChunkSource(); -@@ -707,10 +725,55 @@ public class LevelChunk extends ChunkAccess { - } - } - this.setNeighbourLoaded(0, 0, this); -+ this.level.getChunkSource().addLoadedChunk(this); -+ } -+ -+ public void onChunkLoad(io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder) { -+ // figure out how this should interface with: -+ // the entity chunk load event // -> moved to the FULL status -+ // the chunk load event // -> stays here -+ // any entity add to world events // -> in FULL status -+ this.loadCallback(); -+ io.papermc.paper.chunk.system.ChunkSystem.onChunkBorder(this, chunkHolder.vanillaChunkHolder); -+ } -+ -+ public void onChunkUnload(io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder) { -+ // figure out how this should interface with: -+ // the entity chunk load event // -> moved to chunk unload to disk (not written yet) -+ // the chunk load event // -> stays here -+ // any entity add to world events // -> goes into the unload logic, it will completely explode -+ // etc later -+ this.unloadCallback(); -+ io.papermc.paper.chunk.system.ChunkSystem.onChunkNotBorder(this, chunkHolder.vanillaChunkHolder); -+ } -+ -+ public void onChunkTicking(io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder) { -+ this.postProcessGeneration(); -+ this.level.startTickingChunk(this); -+ io.papermc.paper.chunk.system.ChunkSystem.onChunkTicking(this, chunkHolder.vanillaChunkHolder); -+ } -+ -+ public void onChunkNotTicking(io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder) { -+ io.papermc.paper.chunk.system.ChunkSystem.onChunkNotTicking(this, chunkHolder.vanillaChunkHolder); -+ } -+ -+ public void onChunkEntityTicking(io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder) { -+ io.papermc.paper.chunk.system.ChunkSystem.onChunkEntityTicking(this, chunkHolder.vanillaChunkHolder); -+ } -+ -+ public void onChunkNotEntityTicking(io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder) { -+ io.papermc.paper.chunk.system.ChunkSystem.onChunkNotEntityTicking(this, chunkHolder.vanillaChunkHolder); -+ } -+ // Paper end - new load callbacks -+ -+ // CraftBukkit start -+ public void loadCallback() { -+ if (this.loadedTicketLevel) { LOGGER.error("Double calling chunk load!", new Throwable()); } // Paper -+ // Paper - rewrite chunk system - move into separate callback - this.loadedTicketLevel = true; -- // Paper end - neighbour cache -+ // Paper - rewrite chunk system - move into separate callback - org.bukkit.Server server = this.level.getCraftServer(); -- this.level.getChunkSource().addLoadedChunk(this); // Paper -+ // Paper - rewrite chunk system - move into separate callback - if (server != null) { - /* - * If it's a new world, the first few chunks are generated inside -@@ -719,6 +782,7 @@ public class LevelChunk extends ChunkAccess { - */ - org.bukkit.Chunk bukkitChunk = new org.bukkit.craftbukkit.CraftChunk(this); - server.getPluginManager().callEvent(new org.bukkit.event.world.ChunkLoadEvent(bukkitChunk, this.needsDecoration)); -+ this.chunkHolder.getEntityChunk().callEntitiesLoadEvent(); // Paper - rewrite chunk system - - if (this.needsDecoration) { - try (co.aikar.timings.Timing ignored = this.level.timings.chunkLoadPopulate.startTiming()) { // Paper -@@ -747,9 +811,11 @@ public class LevelChunk extends ChunkAccess { - } - - public void unloadCallback() { -+ if (!this.loadedTicketLevel) { LOGGER.error("Double calling chunk unload!", new Throwable()); } // Paper - org.bukkit.Server server = this.level.getCraftServer(); -+ this.chunkHolder.getEntityChunk().callEntitiesUnloadEvent(); // Paper - rewrite chunk system - org.bukkit.Chunk bukkitChunk = new org.bukkit.craftbukkit.CraftChunk(this); -- org.bukkit.event.world.ChunkUnloadEvent unloadEvent = new org.bukkit.event.world.ChunkUnloadEvent(bukkitChunk, this.isUnsaved()); -+ org.bukkit.event.world.ChunkUnloadEvent unloadEvent = new org.bukkit.event.world.ChunkUnloadEvent(bukkitChunk, true); // Paper - rewrite chunk system - force save to true so that mustNotSave is correctly set below - server.getPluginManager().callEvent(unloadEvent); - // note: saving can be prevented, but not forced if no saving is actually required - this.mustNotSave = !unloadEvent.isSaveChunk(); -@@ -771,9 +837,26 @@ public class LevelChunk extends ChunkAccess { - // Paper end - } - -+ // Paper start - add dirty system to tick lists -+ @Override -+ public void setUnsaved(boolean needsSaving) { -+ if (!needsSaving) { -+ this.blockTicks.clearDirty(); -+ this.fluidTicks.clearDirty(); -+ } -+ super.setUnsaved(needsSaving); -+ } -+ // Paper end - add dirty system to tick lists -+ - @Override - public boolean isUnsaved() { -- return super.isUnsaved() && !this.mustNotSave; -+ // Paper start - add dirty system to tick lists -+ long gameTime = this.level.getLevelData().getGameTime(); -+ if (this.blockTicks.isDirty(gameTime) || this.fluidTicks.isDirty(gameTime)) { -+ return true; -+ } -+ // Paper end - add dirty system to tick lists -+ return super.isUnsaved(); // Paper - rewrite chunk system - do NOT clobber the dirty flag - } - // CraftBukkit end - -@@ -842,7 +925,9 @@ public class LevelChunk extends ChunkAccess { - return this.blockEntities; - } - -+ public boolean isPostProcessingDone; // Paper - replace chunk loader system - public void postProcessGeneration() { -+ try { // Paper - replace chunk loader system - ChunkPos chunkcoordintpair = this.getPos(); - - for (int i = 0; i < this.postProcessing.length; ++i) { -@@ -863,6 +948,7 @@ public class LevelChunk extends ChunkAccess { - BlockState iblockdata1 = Block.updateFromNeighbourShapes(iblockdata, this.level, blockposition); - - this.level.setBlock(blockposition, iblockdata1, 20); -+ if (iblockdata1 != iblockdata) this.level.chunkSource.blockChanged(blockposition); // Paper - replace player chunk loader - notify since we send before processing full updates - } - } - -@@ -880,6 +966,10 @@ public class LevelChunk extends ChunkAccess { - - this.pendingBlockEntities.clear(); - this.upgradeData.upgrade(this); -+ } finally { // Paper start - replace chunk loader system -+ this.isPostProcessingDone = true; -+ } -+ // Paper end - replace chunk loader system - } - - @Nullable -@@ -929,7 +1019,7 @@ public class LevelChunk extends ChunkAccess { - } - - public FullChunkStatus getFullStatus() { -- return this.fullStatus == null ? FullChunkStatus.FULL : (FullChunkStatus) this.fullStatus.get(); -+ return this.chunkHolder == null ? FullChunkStatus.INACCESSIBLE : this.chunkHolder.getChunkStatus(); // Paper - rewrite chunk system - } - - public void setFullStatus(Supplier levelTypeProvider) { -diff --git a/src/main/java/net/minecraft/world/level/chunk/status/ChunkStatus.java b/src/main/java/net/minecraft/world/level/chunk/status/ChunkStatus.java -index 95318092f8281d98132d1d3ceb4a5c36cf32eb05..b81c548c0e1ac53784e9c94b34b65db5f123309c 100644 ---- a/src/main/java/net/minecraft/world/level/chunk/status/ChunkStatus.java -+++ b/src/main/java/net/minecraft/world/level/chunk/status/ChunkStatus.java -@@ -21,13 +21,15 @@ import net.minecraft.world.level.chunk.ProtoChunk; - import net.minecraft.world.level.levelgen.Heightmap; - - public class ChunkStatus { -+ static final ChunkStatus.LoadingTask PASSTHROUGH_LOAD_TASK = (WorldGenContext context, ChunkStatus status, ToFullChunk fullChunkConverter, ChunkAccess chunk) -> CompletableFuture.completedFuture(chunk); // Paper - rewrite chunk system -+ protected static final java.util.List statuses = new java.util.ArrayList<>(); // Paper - rewrite chunk system - public static final int MAX_STRUCTURE_DISTANCE = 8; - private static final EnumSet PRE_FEATURES = EnumSet.of(Heightmap.Types.OCEAN_FLOOR_WG, Heightmap.Types.WORLD_SURFACE_WG); - public static final EnumSet POST_FEATURES = EnumSet.of( - Heightmap.Types.OCEAN_FLOOR, Heightmap.Types.WORLD_SURFACE, Heightmap.Types.MOTION_BLOCKING, Heightmap.Types.MOTION_BLOCKING_NO_LEAVES - ); - public static final ChunkStatus EMPTY = register( -- "empty", null, -1, false, PRE_FEATURES, ChunkType.PROTOCHUNK, ChunkStatusTasks::generateEmpty, ChunkStatusTasks::loadPassThrough -+ "empty", null, -1, false, PRE_FEATURES, ChunkType.PROTOCHUNK, ChunkStatusTasks::generateEmpty, PASSTHROUGH_LOAD_TASK // Paper - rewrite chunk system - ); - public static final ChunkStatus STRUCTURE_STARTS = register( - "structure_starts", -@@ -47,22 +49,22 @@ public class ChunkStatus { - PRE_FEATURES, - ChunkType.PROTOCHUNK, - ChunkStatusTasks::generateStructureReferences, -- ChunkStatusTasks::loadPassThrough -+ PASSTHROUGH_LOAD_TASK // Paper - rewrite chunk system - ); - public static final ChunkStatus BIOMES = register( -- "biomes", STRUCTURE_REFERENCES, 8, false, PRE_FEATURES, ChunkType.PROTOCHUNK, ChunkStatusTasks::generateBiomes, ChunkStatusTasks::loadPassThrough -+ "biomes", STRUCTURE_REFERENCES, 8, false, PRE_FEATURES, ChunkType.PROTOCHUNK, ChunkStatusTasks::generateBiomes, PASSTHROUGH_LOAD_TASK // Paper - rewrite chunk system - ); - public static final ChunkStatus NOISE = register( -- "noise", BIOMES, 8, false, PRE_FEATURES, ChunkType.PROTOCHUNK, ChunkStatusTasks::generateNoise, ChunkStatusTasks::loadPassThrough -+ "noise", BIOMES, 8, false, PRE_FEATURES, ChunkType.PROTOCHUNK, ChunkStatusTasks::generateNoise, PASSTHROUGH_LOAD_TASK // Paper - rewrite chunk system - ); - public static final ChunkStatus SURFACE = register( -- "surface", NOISE, 8, false, PRE_FEATURES, ChunkType.PROTOCHUNK, ChunkStatusTasks::generateSurface, ChunkStatusTasks::loadPassThrough -+ "surface", NOISE, 8, false, PRE_FEATURES, ChunkType.PROTOCHUNK, ChunkStatusTasks::generateSurface, PASSTHROUGH_LOAD_TASK // Paper - rewrite chunk system - ); - public static final ChunkStatus CARVERS = register( -- "carvers", SURFACE, 8, false, POST_FEATURES, ChunkType.PROTOCHUNK, ChunkStatusTasks::generateCarvers, ChunkStatusTasks::loadPassThrough -+ "carvers", SURFACE, 8, false, POST_FEATURES, ChunkType.PROTOCHUNK, ChunkStatusTasks::generateCarvers, PASSTHROUGH_LOAD_TASK // Paper - rewrite chunk system - ); - public static final ChunkStatus FEATURES = register( -- "features", CARVERS, 8, false, POST_FEATURES, ChunkType.PROTOCHUNK, ChunkStatusTasks::generateFeatures, ChunkStatusTasks::loadPassThrough -+ "features", CARVERS, 8, false, POST_FEATURES, ChunkType.PROTOCHUNK, ChunkStatusTasks::generateFeatures, PASSTHROUGH_LOAD_TASK // Paper - rewrite chunk system - ); - public static final ChunkStatus INITIALIZE_LIGHT = register( - "initialize_light", -@@ -78,7 +80,7 @@ public class ChunkStatus { - "light", INITIALIZE_LIGHT, 1, true, POST_FEATURES, ChunkType.PROTOCHUNK, ChunkStatusTasks::generateLight, ChunkStatusTasks::loadLight - ); - public static final ChunkStatus SPAWN = register( -- "spawn", LIGHT, 1, false, POST_FEATURES, ChunkType.PROTOCHUNK, ChunkStatusTasks::generateSpawn, ChunkStatusTasks::loadPassThrough -+ "spawn", LIGHT, 1, false, POST_FEATURES, ChunkType.PROTOCHUNK, ChunkStatusTasks::generateSpawn, PASSTHROUGH_LOAD_TASK // Paper - rewrite chunk system - ); - public static final ChunkStatus FULL = register( - "full", SPAWN, 0, false, POST_FEATURES, ChunkType.LEVELCHUNK, ChunkStatusTasks::generateFull, ChunkStatusTasks::loadFull -@@ -128,6 +130,27 @@ public class ChunkStatus { - } - } - // Paper end - starlight -+ // Paper start - rewrite chunk system -+ public boolean isParallelCapable; // Paper -+ public int writeRadius = -1; -+ public int loadRange = 0; -+ -+ private ChunkStatus nextStatus; -+ -+ public final ChunkStatus getNextStatus() { -+ return this.nextStatus; -+ } -+ -+ public final boolean isEmptyLoadStatus() { -+ return this.loadingTask == PASSTHROUGH_LOAD_TASK; -+ } -+ -+ public final boolean isEmptyGenStatus() { -+ return this == ChunkStatus.EMPTY; -+ } -+ -+ public final java.util.concurrent.atomic.AtomicBoolean warnedAboutNoImmediateComplete = new java.util.concurrent.atomic.AtomicBoolean(); -+ // Paper end - rewrite chunk system - - private static ChunkStatus register( - String id, -@@ -190,6 +213,13 @@ public class ChunkStatus { - this.chunkType = chunkType; - this.heightmapsAfter = heightMapTypes; - this.index = previous == null ? 0 : previous.getIndex() + 1; -+ // Paper start -+ this.nextStatus = this; -+ if (statuses.size() > 0) { -+ statuses.get(statuses.size() - 1).nextStatus = this; -+ } -+ statuses.add(this); -+ // Paper end - } - - public int getIndex() { -diff --git a/src/main/java/net/minecraft/world/level/chunk/status/ChunkStatusTasks.java b/src/main/java/net/minecraft/world/level/chunk/status/ChunkStatusTasks.java -index ce7f154b9dad4e78ee0189405cf57dcb3d5301b8..a5e8078b99161272b0f826b8c39e56d17588c264 100644 ---- a/src/main/java/net/minecraft/world/level/chunk/status/ChunkStatusTasks.java -+++ b/src/main/java/net/minecraft/world/level/chunk/status/ChunkStatusTasks.java -@@ -26,8 +26,9 @@ public class ChunkStatusTasks { - return CompletableFuture.completedFuture(chunk); - } - -- static CompletableFuture loadPassThrough(WorldGenContext context, ChunkStatus status, ToFullChunk fullChunkConverter, ChunkAccess chunk) { -- return CompletableFuture.completedFuture(chunk); -+ @io.papermc.paper.annotation.DoNotUse @Deprecated(forRemoval = true) // Paper - rewrite chunk system - use ChunkStatus.PASSTHROUGH_LOAD_TASK instead -+ static CompletableFuture loadPassThrough(WorldGenContext context, ChunkStatus status, ToFullChunk fullChunkConverter, ChunkAccess chunk) { // Paper - rewrite chunk system - diff on change -+ return CompletableFuture.completedFuture(chunk); // Paper - rewrite chunk system - diff on change - } - - static CompletableFuture generateStructureStarts(WorldGenContext context, ChunkStatus status, Executor executor, ToFullChunk fullChunkConverter, List chunks, ChunkAccess chunk) { -@@ -125,7 +126,7 @@ public class ChunkStatusTasks { - ((ProtoChunk) chunk).setLightEngine(lightingProvider); - boolean flag = ChunkStatusTasks.isLighted(chunk); - -- return lightingProvider.initializeLight(chunk, flag); -+ return CompletableFuture.completedFuture(chunk); // Paper - rewrite chunk system - } - - static CompletableFuture generateLight(WorldGenContext context, ChunkStatus status, Executor executor, ToFullChunk fullChunkConverter, List chunks, ChunkAccess chunk) { -@@ -139,7 +140,7 @@ public class ChunkStatusTasks { - private static CompletableFuture lightChunk(ThreadedLevelLightEngine lightingProvider, ChunkAccess chunk) { - boolean flag = ChunkStatusTasks.isLighted(chunk); - -- return lightingProvider.lightChunk(chunk, flag); -+ return CompletableFuture.completedFuture(chunk); // Paper - rewrite chunk system - } - - static CompletableFuture generateSpawn(WorldGenContext context, ChunkStatus status, Executor executor, ToFullChunk fullChunkConverter, List chunks, ChunkAccess chunk) { -diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java -index 01d6b8683a9fa30d05b03ebfef8ee2dca4e83a56..5f85d8d82212f9a8133304dc05bf2cd39da1f9e7 100644 ---- a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java -+++ b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java -@@ -112,7 +112,25 @@ public class ChunkSerializer { - } - } - // Paper end - guard against serializing mismatching coordinates -+ // Paper start - rewrite chunk system -+ public static final class InProgressChunkHolder { -+ -+ public final ProtoChunk protoChunk; -+ -+ public CompoundTag poiData; -+ -+ public InProgressChunkHolder(final ProtoChunk protoChunk) { -+ this.protoChunk = protoChunk; -+ } -+ } - public static ProtoChunk read(ServerLevel world, PoiManager poiStorage, ChunkPos chunkPos, CompoundTag nbt) { -+ // Paper start - rewrite chunk system -+ InProgressChunkHolder holder = readInProgressChunkHolder(world, poiStorage, chunkPos, nbt); -+ return holder.protoChunk; -+ } -+ -+ public static InProgressChunkHolder readInProgressChunkHolder(ServerLevel world, PoiManager poiStorage, ChunkPos chunkPos, CompoundTag nbt) { -+ // Paper end - rewrite chunk system - // Paper start - Do not let the server load chunks from newer versions - if (nbt.contains("DataVersion", net.minecraft.nbt.Tag.TAG_ANY_NUMERIC)) { - final int dataVersion = nbt.getInt("DataVersion"); -@@ -178,7 +196,7 @@ public class ChunkSerializer { - achunksection[k] = chunksection; - SectionPos sectionposition = SectionPos.of(chunkPos, b0); - -- poiStorage.checkConsistencyWithBlocks(sectionposition, chunksection); -+ // Paper - rewrite chunk system - moved to final load stage - } - - boolean flag3 = nbttagcompound1.contains("BlockLight", 7); -@@ -325,7 +343,7 @@ public class ChunkSerializer { - } - - if (chunktype == ChunkType.LEVELCHUNK) { -- return new ImposterProtoChunk((LevelChunk) object1, false); -+ return new InProgressChunkHolder(new ImposterProtoChunk((LevelChunk) object1, false)); // Paper - Async chunk loading - } else { - ProtoChunk protochunk1 = (ProtoChunk) object1; - -@@ -360,9 +378,41 @@ public class ChunkSerializer { - protochunk1.setCarvingMask(worldgenstage_features, new CarvingMask(nbttagcompound5.getLongArray(s1), ((ChunkAccess) object1).getMinBuildHeight())); - } - -- return protochunk1; -+ return new InProgressChunkHolder(protochunk1); // Paper - Async chunk loading -+ } -+ } -+ -+ // Paper start - async chunk save for unload -+ public record AsyncSaveData( -+ Tag blockTickList, // non-null if we had to go to the server's tick list -+ Tag fluidTickList, // non-null if we had to go to the server's tick list -+ ListTag blockEntities, -+ long worldTime -+ ) {} -+ -+ // must be called sync -+ public static AsyncSaveData getAsyncSaveData(ServerLevel world, ChunkAccess chunk) { -+ org.spigotmc.AsyncCatcher.catchOp("preparation of chunk data for async save"); -+ -+ final CompoundTag tickLists = new CompoundTag(); -+ ChunkSerializer.saveTicks(world, tickLists, chunk.getTicksForSerialization()); -+ -+ ListTag blockEntitiesSerialized = new ListTag(); -+ for (final BlockPos blockPos : chunk.getBlockEntitiesPos()) { -+ final CompoundTag blockEntityNbt = chunk.getBlockEntityNbtForSaving(blockPos, world.registryAccess()); -+ if (blockEntityNbt != null) { -+ blockEntitiesSerialized.add(blockEntityNbt); -+ } - } -+ -+ return new AsyncSaveData( -+ tickLists.get(BLOCK_TICKS_TAG), -+ tickLists.get(FLUID_TICKS_TAG), -+ blockEntitiesSerialized, -+ world.getGameTime() -+ ); - } -+ // Paper end - - private static void logErrors(ChunkPos chunkPos, int y, String message) { - ChunkSerializer.LOGGER.error("Recoverable errors when loading section [" + chunkPos.x + ", " + y + ", " + chunkPos.z + "]: " + message); -@@ -379,6 +429,11 @@ public class ChunkSerializer { - // CraftBukkit end - - public static CompoundTag write(ServerLevel world, ChunkAccess chunk) { -+ // Paper start -+ return saveChunk(world, chunk, null); -+ } -+ public static CompoundTag saveChunk(ServerLevel world, ChunkAccess chunk, @org.checkerframework.checker.nullness.qual.Nullable AsyncSaveData asyncsavedata) { -+ // Paper end - // Paper start - rewrite light impl - final int minSection = io.papermc.paper.util.WorldUtil.getMinLightSection(world); - final int maxSection = io.papermc.paper.util.WorldUtil.getMaxLightSection(world); -@@ -391,7 +446,7 @@ public class ChunkSerializer { - nbttagcompound.putInt("xPos", chunkcoordintpair.x); - nbttagcompound.putInt("yPos", chunk.getMinSection()); - nbttagcompound.putInt("zPos", chunkcoordintpair.z); -- nbttagcompound.putLong("LastUpdate", world.getGameTime()); -+ nbttagcompound.putLong("LastUpdate", asyncsavedata != null ? asyncsavedata.worldTime : world.getGameTime()); // Paper - async chunk unloading - nbttagcompound.putLong("InhabitedTime", chunk.getInhabitedTime()); - nbttagcompound.putString("Status", BuiltInRegistries.CHUNK_STATUS.getKey(chunk.getStatus()).toString()); - BlendingData blendingdata = chunk.getBlendingData(); -@@ -485,8 +540,17 @@ public class ChunkSerializer { - nbttagcompound.putBoolean("isLightOn", false); // Paper - set to false but still store, this allows us to detect --eraseCache (as eraseCache _removes_) - } - -- ListTag nbttaglist1 = new ListTag(); -- Iterator iterator = chunk.getBlockEntitiesPos().iterator(); -+ // Paper start -+ ListTag nbttaglist1; -+ Iterator iterator; -+ if (asyncsavedata != null) { -+ nbttaglist1 = asyncsavedata.blockEntities; -+ iterator = java.util.Collections.emptyIterator(); -+ } else { -+ nbttaglist1 = new ListTag(); -+ iterator = chunk.getBlockEntitiesPos().iterator(); -+ } -+ // Paper end - - CompoundTag nbttagcompound2; - -@@ -522,7 +586,14 @@ public class ChunkSerializer { - nbttagcompound.put("CarvingMasks", nbttagcompound2); - } - -+ // Paper start -+ if (asyncsavedata != null) { -+ nbttagcompound.put(BLOCK_TICKS_TAG, asyncsavedata.blockTickList); -+ nbttagcompound.put(FLUID_TICKS_TAG, asyncsavedata.fluidTickList); -+ } else { - ChunkSerializer.saveTicks(world, nbttagcompound, chunk.getTicksForSerialization()); -+ } -+ // Paper end - nbttagcompound.put("PostProcessing", ChunkSerializer.packOffsets(chunk.getPostProcessing())); - CompoundTag nbttagcompound3 = new CompoundTag(); - Iterator iterator1 = chunk.getHeightmaps().iterator(); -@@ -578,7 +649,7 @@ public class ChunkSerializer { - - return nbttaglist == null && nbttaglist1 == null ? null : (chunk) -> { - if (nbttaglist != null) { -- world.addLegacyChunkEntities(EntityType.loadEntitiesRecursive(nbttaglist, world)); -+ world.addLegacyChunkEntities(EntityType.loadEntitiesRecursive(nbttaglist, world), chunk.getPos()); // Paper - rewrite chunk system - } - - if (nbttaglist1 != null) { -diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkStorage.java -index a62c90e10c0dfa4c6211a05c4071932756d7b218..554dede2ad0e45d3ee4ccc5510b7644f2e9e4250 100644 ---- a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkStorage.java -+++ b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkStorage.java -@@ -31,18 +31,21 @@ import net.minecraft.world.level.storage.DimensionDataStorage; - public class ChunkStorage implements AutoCloseable { - - public static final int LAST_MONOLYTH_STRUCTURE_DATA_VERSION = 1493; -- private final IOWorker worker; -+ // Paper start - rewrite chunk system; async chunk IO -+ private final Object persistentDataLock = new Object(); -+ public final RegionFileStorage regionFileCache; -+ // Paper end - rewrite chunk system - protected final DataFixer fixerUpper; - @Nullable - private volatile LegacyStructureDataHandler legacyStructureHandler; - - public ChunkStorage(RegionStorageInfo storageKey, Path directory, DataFixer dataFixer, boolean dsync) { - this.fixerUpper = dataFixer; -- this.worker = new IOWorker(storageKey, directory, dsync); -+ this.regionFileCache = new RegionFileStorage(storageKey, directory, dsync); // Paper - rewrite chunk system; async chunk IO - } - - public boolean isOldChunkAround(ChunkPos chunkPos, int checkRadius) { -- return this.worker.isOldChunkAround(chunkPos, checkRadius); -+ return true; // Paper - rewrite chunk system - } - - // CraftBukkit start -@@ -50,8 +53,9 @@ public class ChunkStorage implements AutoCloseable { - if (true) return true; // Paper - Perf: this isn't even needed anymore, light is purged updating to 1.14+, why are we holding up the conversion process reading chunk data off disk - return true, we need to set light populated to true so the converter recognizes the chunk as being "full" - ChunkPos pos = new ChunkPos(x, z); - if (cps != null) { -- com.google.common.base.Preconditions.checkState(org.bukkit.Bukkit.isPrimaryThread(), "primary thread"); -- if (cps.hasChunk(x, z)) { -+ // Paper start - rewrite chunk system; async chunk IO -+ if (cps.getChunkAtIfCachedImmediately(x, z) != null) { // isLoaded is a ticket level check, not a chunk loaded check! -+ // Paper end - rewrite chunk system - return true; - } - } -@@ -79,6 +83,7 @@ public class ChunkStorage implements AutoCloseable { - - public CompoundTag upgradeChunkTag(ResourceKey resourcekey, Supplier supplier, CompoundTag nbttagcompound, Optional>> optional, ChunkPos pos, @Nullable LevelAccessor generatoraccess) { - // CraftBukkit end -+ nbttagcompound = nbttagcompound.copy(); // Paper - defensive copy, another thread might modify this - int i = ChunkStorage.getVersion(nbttagcompound); - - try { -@@ -97,9 +102,11 @@ public class ChunkStorage implements AutoCloseable { - if (i < 1493) { - ca.spottedleaf.dataconverter.minecraft.MCDataConverter.convertTag(ca.spottedleaf.dataconverter.minecraft.datatypes.MCTypeRegistry.CHUNK, nbttagcompound, i, 1493); // Paper - replace chunk converter - if (nbttagcompound.getCompound("Level").getBoolean("hasLegacyStructureData")) { -+ synchronized (this.persistentDataLock) { // Paper - Async chunk loading - LegacyStructureDataHandler persistentstructurelegacy = this.getLegacyStructureHandler(resourcekey, supplier); - - nbttagcompound = persistentstructurelegacy.updateFromLegacy(nbttagcompound); -+ } // Paper - Async chunk loading - } - } - -@@ -139,7 +146,7 @@ public class ChunkStorage implements AutoCloseable { - LegacyStructureDataHandler persistentstructurelegacy = this.legacyStructureHandler; - - if (persistentstructurelegacy == null) { -- synchronized (this) { -+ synchronized (this.persistentDataLock) { // Paper - async chunk loading - persistentstructurelegacy = this.legacyStructureHandler; - if (persistentstructurelegacy == null) { - this.legacyStructureHandler = persistentstructurelegacy = LegacyStructureDataHandler.getLegacyStructureHandler(worldKey, (DimensionDataStorage) stateManagerGetter.get()); -@@ -165,10 +172,20 @@ public class ChunkStorage implements AutoCloseable { - } - - public CompletableFuture> read(ChunkPos chunkPos) { -- return this.worker.loadAsync(chunkPos); -+ // Paper start - async chunk io -+ try { -+ return CompletableFuture.completedFuture(Optional.ofNullable(this.readSync(chunkPos))); -+ } catch (Throwable thr) { -+ return CompletableFuture.failedFuture(thr); -+ } -+ } -+ @Nullable -+ public CompoundTag readSync(ChunkPos chunkPos) throws IOException { -+ return this.regionFileCache.read(chunkPos); - } -+ // Paper end - async chunk io - -- public CompletableFuture write(ChunkPos chunkPos, CompoundTag nbt) { -+ public CompletableFuture write(ChunkPos chunkPos, CompoundTag nbt) throws IOException { // Paper - rewrite chunk system; async chunk io - // Paper start - guard against serializing mismatching coordinates - if (nbt != null && !chunkPos.equals(ChunkSerializer.getChunkCoordinate(nbt))) { - final String world = (this instanceof net.minecraft.server.level.ChunkMap) ? ((net.minecraft.server.level.ChunkMap) this).level.getWorld().getName() : null; -@@ -176,26 +193,39 @@ public class ChunkStorage implements AutoCloseable { - + " but compound says coordinate is " + ChunkSerializer.getChunkCoordinate(nbt) + (world == null ? " for an unknown world" : (" for world: " + world))); - } - // Paper end - guard against serializing mismatching coordinates -+ this.regionFileCache.write(chunkPos, nbt); // Paper - rewrite chunk system; async chunk io, move above legacy structure index - this.handleLegacyStructureIndex(chunkPos); -- return this.worker.store(chunkPos, nbt); -+ // Paper - rewrite chunk system; async chunk io, move above legacy structure index -+ return null; - } - - protected void handleLegacyStructureIndex(ChunkPos chunkPos) { - if (this.legacyStructureHandler != null) { -+ synchronized (this.persistentDataLock) { // Paper - rewrite chunk system; async chunk io - this.legacyStructureHandler.removeIndex(chunkPos.toLong()); -+ } // Paper - rewrite chunk system; async chunk io - } - - } - - public void flushWorker() { -- this.worker.synchronize(true).join(); -+ io.papermc.paper.chunk.system.io.RegionFileIOThread.flush(); // Paper - rewrite chunk system - } - - public void close() throws IOException { -- this.worker.close(); -+ this.regionFileCache.close(); // Paper - nuke IO worker - } - - public ChunkScanAccess chunkScanner() { -- return this.worker; -+ // Paper start - nuke IO worker -+ return ((chunkPos, streamTagVisitor) -> { -+ try { -+ this.regionFileCache.scanChunk(chunkPos, streamTagVisitor); -+ return java.util.concurrent.CompletableFuture.completedFuture(null); -+ } catch (IOException e) { -+ throw new RuntimeException(e); -+ } -+ }); -+ // Paper end - } - } -diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/EntityStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/EntityStorage.java -index 49d8a62d2b6ca6da4e02b3cec7e42c38b7781b57..9fdf8f857a5f9b231c6d0633eaba498244214f74 100644 ---- a/src/main/java/net/minecraft/world/level/chunk/storage/EntityStorage.java -+++ b/src/main/java/net/minecraft/world/level/chunk/storage/EntityStorage.java -@@ -27,43 +27,30 @@ public class EntityStorage implements EntityPersistentStorage { - private static final String ENTITIES_TAG = "Entities"; - private static final String POSITION_TAG = "Position"; - public final ServerLevel level; -- private final SimpleRegionStorage simpleRegionStorage; -+ // Paper - rewrite chunk system - private final LongSet emptyChunks = new LongOpenHashSet(); -- public final ProcessorMailbox entityDeserializerQueue; -+ // Paper - rewrite chunk system - - public EntityStorage(SimpleRegionStorage storage, ServerLevel world, Executor executor) { -- this.simpleRegionStorage = storage; -+ // Paper - rewrite chunk system - this.level = world; -- this.entityDeserializerQueue = ProcessorMailbox.create(executor, "entity-deserializer"); -+ // Paper - rewrite chunk system - } - - @Override - public CompletableFuture> loadEntities(ChunkPos pos) { -- return this.emptyChunks.contains(pos.toLong()) -- ? CompletableFuture.completedFuture(emptyChunk(pos)) -- : this.simpleRegionStorage.read(pos).thenApplyAsync(nbt -> { -- if (nbt.isEmpty()) { -- this.emptyChunks.add(pos.toLong()); -- return emptyChunk(pos); -- } else { -- try { -- ChunkPos chunkPos2 = readChunkPos(nbt.get()); -- if (!Objects.equals(pos, chunkPos2)) { -- LOGGER.error("Chunk file at {} is in the wrong location. (Expected {}, got {})", pos, pos, chunkPos2); -- } -- } catch (Exception var6) { -- LOGGER.warn("Failed to parse chunk {} position info", pos, var6); -- } -- -- CompoundTag compoundTag = this.simpleRegionStorage.upgradeChunkTag(nbt.get(), -1); -- ListTag listTag = compoundTag.getList("Entities", 10); -- List list = EntityType.loadEntitiesRecursive(listTag, this.level).collect(ImmutableList.toImmutableList()); -- return new ChunkEntities<>(pos, list); -- } -- }, this.entityDeserializerQueue::tell); -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - copy out read logic into readEntities - } - -- private static ChunkPos readChunkPos(CompoundTag chunkNbt) { -+ // Paper start - rewrite chunk system -+ public static List readEntities(ServerLevel level, CompoundTag compoundTag) { -+ ListTag listTag = compoundTag.getList("Entities", 10); -+ List list = EntityType.loadEntitiesRecursive(listTag, level).collect(ImmutableList.toImmutableList()); -+ return list; -+ } -+ // Paper end - rewrite chunk system -+ -+ public static ChunkPos readChunkPos(CompoundTag chunkNbt) { // Paper - public - int[] is = chunkNbt.getIntArray("Position"); - return new ChunkPos(is[0], is[1]); - } -@@ -78,38 +65,74 @@ public class EntityStorage implements EntityPersistentStorage { - - @Override - public void storeEntities(ChunkEntities dataList) { -+ // Paper start - rewrite chunk system -+ if (true) { -+ throw new UnsupportedOperationException(); -+ } -+ // Paper end - rewrite chunk system - ChunkPos chunkPos = dataList.getPos(); - if (dataList.isEmpty()) { - if (this.emptyChunks.add(chunkPos.toLong())) { -- this.simpleRegionStorage.write(chunkPos, null); -+ // Paper - rewrite chunk system - fix compile for unused field in dead code - } - } else { -- ListTag listTag = new ListTag(); -- dataList.getEntities().forEach(entity -> { -- CompoundTag compoundTagx = new CompoundTag(); -- if (entity.save(compoundTagx)) { -- listTag.add(compoundTagx); -- } -- }); -- CompoundTag compoundTag = NbtUtils.addCurrentDataVersion(new CompoundTag()); -- compoundTag.put("Entities", listTag); -- writeChunkPos(compoundTag, chunkPos); -- this.simpleRegionStorage.write(chunkPos, compoundTag).exceptionally(ex -> { -- LOGGER.error("Failed to store chunk {}", chunkPos, ex); -- return null; -- }); -+ // Paper - move into saveEntityChunk0 - this.emptyChunks.remove(chunkPos.toLong()); - } - } - -+ // Paper start - rewrite chunk system -+ public static void copyEntities(final CompoundTag from, final CompoundTag into) { -+ if (from == null) { -+ return; -+ } -+ final ListTag entitiesFrom = from.getList("Entities", net.minecraft.nbt.Tag.TAG_COMPOUND); -+ if (entitiesFrom == null || entitiesFrom.isEmpty()) { -+ return; -+ } -+ -+ final ListTag entitiesInto = into.getList("Entities", net.minecraft.nbt.Tag.TAG_COMPOUND); -+ into.put("Entities", entitiesInto); // this is in case into doesn't have any entities -+ entitiesInto.addAll(0, entitiesFrom.copy()); // need to copy, this is coming from the save thread -+ } -+ -+ public static CompoundTag saveEntityChunk(List entities, ChunkPos chunkPos, ServerLevel level) { -+ return saveEntityChunk0(entities, chunkPos, level, false); -+ } -+ private static CompoundTag saveEntityChunk0(List entities, ChunkPos chunkPos, ServerLevel level, boolean force) { -+ if (!force && entities.isEmpty()) { -+ return null; -+ } -+ -+ ListTag listTag = new ListTag(); -+ entities.forEach((entity) -> { // diff here: use entities parameter -+ CompoundTag compoundTag = new CompoundTag(); -+ if (entity.save(compoundTag)) { -+ listTag.add(compoundTag); -+ } -+ -+ }); -+ CompoundTag compoundTag = NbtUtils.addCurrentDataVersion(new CompoundTag()); -+ compoundTag.put("Entities", listTag); -+ writeChunkPos(compoundTag, chunkPos); -+ // Paper - remove worker usage -+ -+ return !force && listTag.isEmpty() ? null : compoundTag; -+ } -+ -+ public static CompoundTag upgradeChunkTag(CompoundTag chunkNbt) { -+ int i = NbtUtils.getDataVersion(chunkNbt, -1); -+ return ca.spottedleaf.dataconverter.minecraft.MCDataConverter.convertTag(ca.spottedleaf.dataconverter.minecraft.datatypes.MCTypeRegistry.ENTITY_CHUNK, chunkNbt, i, net.minecraft.SharedConstants.getCurrentVersion().getDataVersion().getVersion()); -+ } -+ // Paper end - rewrite chunk system -+ - @Override - public void flush(boolean sync) { -- this.simpleRegionStorage.synchronize(sync).join(); -- this.entityDeserializerQueue.runAll(); -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - - @Override - public void close() throws IOException { -- this.simpleRegionStorage.close(); -+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - } - } -diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java -index e858436bcf1b234d4bc6e6a117f5224d5c2d9f90..307196b2a58d4f8db3e6e3c3517a8004d4908b13 100644 ---- a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java -+++ b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java -@@ -48,6 +48,7 @@ public class RegionFile implements AutoCloseable { - private final IntBuffer timestamps; - @VisibleForTesting - protected final RegionBitmap usedSectors; -+ public final java.util.concurrent.locks.ReentrantLock fileLock = new java.util.concurrent.locks.ReentrantLock(); // Paper - - public RegionFile(RegionStorageInfo storageKey, Path directory, Path path, boolean dsync) throws IOException { - this(storageKey, directory, path, RegionFileVersion.getCompressionFormat(), dsync); // Paper - Configurable region compression format -@@ -250,7 +251,7 @@ public class RegionFile implements AutoCloseable { - return (byteCount + 4096 - 1) / 4096; - } - -- public boolean doesChunkExist(ChunkPos pos) { -+ public synchronized boolean doesChunkExist(ChunkPos pos) { // Paper - synchronized - int i = this.getOffset(pos); - - if (i == 0) { -@@ -417,6 +418,11 @@ public class RegionFile implements AutoCloseable { - } - - public void close() throws IOException { -+ // Paper start - Prevent regionfiles from being closed during use -+ this.fileLock.lock(); -+ synchronized (this) { -+ try { -+ // Paper end - try { - this.padToFullSector(); - } finally { -@@ -426,6 +432,10 @@ public class RegionFile implements AutoCloseable { - this.file.close(); - } - } -+ } finally { // Paper start - Prevent regionfiles from being closed during use -+ this.fileLock.unlock(); -+ } -+ } // Paper end - - } - -diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java -index c4eef3aade889c69cefd873bec2d031cc54103ea..3f6955be976064eb542b5c50a9d6d74457c1833c 100644 ---- a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java -+++ b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java -@@ -26,31 +26,99 @@ public class RegionFileStorage implements AutoCloseable { - private final Path folder; - private final boolean sync; - -- RegionFileStorage(RegionStorageInfo storageKey, Path directory, boolean dsync) { -+ // Paper start - cache regionfile does not exist state -+ static final int MAX_NON_EXISTING_CACHE = 1024 * 64; -+ private final it.unimi.dsi.fastutil.longs.LongLinkedOpenHashSet nonExistingRegionFiles = new it.unimi.dsi.fastutil.longs.LongLinkedOpenHashSet(); -+ private synchronized boolean doesRegionFilePossiblyExist(long position) { -+ if (this.nonExistingRegionFiles.contains(position)) { -+ this.nonExistingRegionFiles.addAndMoveToFirst(position); -+ return false; -+ } -+ return true; -+ } -+ -+ private synchronized void createRegionFile(long position) { -+ this.nonExistingRegionFiles.remove(position); -+ } -+ -+ private synchronized void markNonExisting(long position) { -+ if (this.nonExistingRegionFiles.addAndMoveToFirst(position)) { -+ while (this.nonExistingRegionFiles.size() >= MAX_NON_EXISTING_CACHE) { -+ this.nonExistingRegionFiles.removeLastLong(); -+ } -+ } -+ } -+ -+ public synchronized boolean doesRegionFileNotExistNoIO(ChunkPos pos) { -+ long key = ChunkPos.asLong(pos.getRegionX(), pos.getRegionZ()); -+ return !this.doesRegionFilePossiblyExist(key); -+ } -+ // Paper end - cache regionfile does not exist state -+ -+ protected RegionFileStorage(RegionStorageInfo storageKey, Path directory, boolean dsync) { // Paper - protected constructor - this.folder = directory; - this.sync = dsync; - this.info = storageKey; - } - -- private RegionFile getRegionFile(ChunkPos chunkcoordintpair, boolean existingOnly) throws IOException { // CraftBukkit -- long i = ChunkPos.asLong(chunkcoordintpair.getRegionX(), chunkcoordintpair.getRegionZ()); -+ // Paper start -+ public synchronized RegionFile getRegionFileIfLoaded(ChunkPos chunkcoordintpair) { -+ return this.regionCache.getAndMoveToFirst(ChunkPos.asLong(chunkcoordintpair.getRegionX(), chunkcoordintpair.getRegionZ())); -+ } -+ -+ public synchronized boolean chunkExists(ChunkPos pos) throws IOException { -+ RegionFile regionfile = getRegionFile(pos, true); -+ -+ return regionfile != null ? regionfile.hasChunk(pos) : false; -+ } -+ -+ public synchronized RegionFile getRegionFile(ChunkPos chunkcoordintpair, boolean existingOnly) throws IOException { // CraftBukkit -+ return this.getRegionFile(chunkcoordintpair, existingOnly, false); -+ } -+ public synchronized RegionFile getRegionFile(ChunkPos chunkcoordintpair, boolean existingOnly, boolean lock) throws IOException { -+ // Paper end -+ long i = ChunkPos.asLong(chunkcoordintpair.getRegionX(), chunkcoordintpair.getRegionZ()); final long regionPos = i; // Paper - OBFHELPER - RegionFile regionfile = (RegionFile) this.regionCache.getAndMoveToFirst(i); - - if (regionfile != null) { -+ // Paper start -+ if (lock) { -+ // must be in this synchronized block -+ regionfile.fileLock.lock(); -+ } -+ // Paper end - return regionfile; - } else { -+ // Paper start - cache regionfile does not exist state -+ if (existingOnly && !this.doesRegionFilePossiblyExist(regionPos)) { -+ return null; -+ } -+ // Paper end - cache regionfile does not exist state - if (this.regionCache.size() >= io.papermc.paper.configuration.GlobalConfiguration.get().misc.regionFileCacheSize) { // Paper - Sanitise RegionFileCache and make configurable - ((RegionFile) this.regionCache.removeLast()).close(); - } - -- FileUtil.createDirectoriesSafe(this.folder); -+ // Paper - only create directory if not existing only - moved down - Path path = this.folder; - int j = chunkcoordintpair.getRegionX(); - Path path1 = path.resolve("r." + j + "." + chunkcoordintpair.getRegionZ() + ".mca"); -- if (existingOnly && !java.nio.file.Files.exists(path1)) return null; // CraftBukkit -+ if (existingOnly && !java.nio.file.Files.exists(path1)) { // Paper start - cache regionfile does not exist state -+ this.markNonExisting(regionPos); -+ return null; // CraftBukkit -+ } else { -+ this.createRegionFile(regionPos); -+ } -+ // Paper end - cache regionfile does not exist state -+ FileUtil.createDirectoriesSafe(this.folder); // Paper - only create directory if not existing only - moved from above - RegionFile regionfile1 = new RegionFile(this.info, path1, this.folder, this.sync); - - this.regionCache.putAndMoveToFirst(i, regionfile1); -+ // Paper start -+ if (lock) { -+ // must be in this synchronized block -+ regionfile1.fileLock.lock(); -+ } -+ // Paper end - return regionfile1; - } - } -@@ -58,11 +126,12 @@ public class RegionFileStorage implements AutoCloseable { - @Nullable - public CompoundTag read(ChunkPos pos) throws IOException { - // CraftBukkit start - SPIGOT-5680: There's no good reason to preemptively create files on read, save that for writing -- RegionFile regionfile = this.getRegionFile(pos, true); -+ RegionFile regionfile = this.getRegionFile(pos, true, true); // Paper - if (regionfile == null) { - return null; - } - // CraftBukkit end -+ try { // Paper - DataInputStream datainputstream = regionfile.getChunkDataInputStream(pos); - - CompoundTag nbttagcompound; -@@ -99,6 +168,9 @@ public class RegionFileStorage implements AutoCloseable { - } - - return nbttagcompound; -+ } finally { // Paper start -+ regionfile.fileLock.unlock(); -+ } // Paper end - } - - public void scanChunk(ChunkPos chunkPos, StreamTagVisitor scanner) throws IOException { -@@ -133,7 +205,13 @@ public class RegionFileStorage implements AutoCloseable { - } - - protected void write(ChunkPos pos, @Nullable CompoundTag nbt) throws IOException { -- RegionFile regionfile = this.getRegionFile(pos, false); // CraftBukkit -+ // Paper start - rewrite chunk system -+ RegionFile regionfile = this.getRegionFile(pos, nbt == null, true); // CraftBukkit -+ if (nbt == null && regionfile == null) { -+ return; -+ } -+ try { // Try finally to unlock the region file -+ // Paper end - rewrite chunk system - // Paper start - Chunk save reattempt - int attempts = 0; - Exception lastException = null; -@@ -179,9 +257,14 @@ public class RegionFileStorage implements AutoCloseable { - net.minecraft.server.MinecraftServer.LOGGER.error("Failed to save chunk {}", pos, lastException); - } - // Paper end - Chunk save reattempt -+ // Paper start - rewrite chunk system -+ } finally { -+ regionfile.fileLock.unlock(); -+ } -+ // Paper end - rewrite chunk system - } - -- public void close() throws IOException { -+ public synchronized void close() throws IOException { // Paper -> synchronized - ExceptionCollector exceptionsuppressor = new ExceptionCollector<>(); - ObjectIterator objectiterator = this.regionCache.values().iterator(); - -@@ -198,7 +281,7 @@ public class RegionFileStorage implements AutoCloseable { - exceptionsuppressor.throwIfPresent(); - } - -- public void flush() throws IOException { -+ public synchronized void flush() throws IOException { // Paper - synchronize - ObjectIterator objectiterator = this.regionCache.values().iterator(); - - while (objectiterator.hasNext()) { -diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/SectionStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/SectionStorage.java -index 151fcbca34e02783e19fbb7b54ec4fbec2eed190..883fbe5c81e3be27007a1a0489f80ba1863e5a04 100644 ---- a/src/main/java/net/minecraft/world/level/chunk/storage/SectionStorage.java -+++ b/src/main/java/net/minecraft/world/level/chunk/storage/SectionStorage.java -@@ -12,6 +12,7 @@ import it.unimi.dsi.fastutil.longs.Long2ObjectMap; - import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap; - import it.unimi.dsi.fastutil.longs.LongLinkedOpenHashSet; - import java.io.IOException; -+import java.nio.file.Path; - import java.util.Map; - import java.util.Optional; - import java.util.concurrent.CompletableFuture; -@@ -31,25 +32,30 @@ import net.minecraft.world.level.ChunkPos; - import net.minecraft.world.level.LevelHeightAccessor; - import org.slf4j.Logger; - --public class SectionStorage implements AutoCloseable { -+public class SectionStorage extends RegionFileStorage implements AutoCloseable { // Paper - nuke IOWorker - private static final Logger LOGGER = LogUtils.getLogger(); - private static final String SECTIONS_TAG = "Sections"; -- private final SimpleRegionStorage simpleRegionStorage; -+ // Paper - remove mojang I/O thread - private final Long2ObjectMap> storage = new Long2ObjectOpenHashMap<>(); - private final LongLinkedOpenHashSet dirty = new LongLinkedOpenHashSet(); - private final Function> codec; - private final Function factory; -- private final RegistryAccess registryAccess; -+ public final RegistryAccess registryAccess; // Paper - rewrite chunk system - public - protected final LevelHeightAccessor levelHeightAccessor; - - public SectionStorage( -+ // Paper start -+ RegionStorageInfo regionStorageInfo, -+ Path path, -+ boolean dsync, -+ // Paper end - SimpleRegionStorage storageAccess, - Function> codecFactory, - Function factory, - RegistryAccess registryManager, - LevelHeightAccessor world - ) { -- this.simpleRegionStorage = storageAccess; -+ super(regionStorageInfo, path, dsync); // Paper - remove mojang I/O thread - this.codec = codecFactory; - this.factory = factory; - this.registryAccess = registryManager; -@@ -112,23 +118,21 @@ public class SectionStorage implements AutoCloseable { - } - - private void readColumn(ChunkPos pos) { -- Optional optional = this.tryRead(pos).join(); -- RegistryOps registryOps = this.registryAccess.createSerializationContext(NbtOps.INSTANCE); -- this.readColumn(pos, registryOps, optional.orElse(null)); -+ throw new IllegalStateException("Only chunk system can load in state, offending class:" + this.getClass().getName()); // Paper - rewrite chunk system - } - - private CompletableFuture> tryRead(ChunkPos pos) { -- return this.simpleRegionStorage.read(pos).exceptionally(throwable -> { -- if (throwable instanceof IOException iOException) { -- LOGGER.error("Error reading chunk {} data from disk", pos, iOException); -- return Optional.empty(); -- } else { -- throw new CompletionException(throwable); -- } -- }); -+ // Paper start - rewrite chunk system -+ try { -+ return CompletableFuture.completedFuture(Optional.ofNullable(this.read(pos))); -+ } catch (Throwable thr) { -+ return CompletableFuture.failedFuture(thr); -+ } -+ // Paper end - rewrite chunk system - } - - private void readColumn(ChunkPos pos, RegistryOps ops, @Nullable CompoundTag nbt) { -+ if (true) throw new IllegalStateException("Only chunk system can load in state, offending class:" + this.getClass().getName()); // Paper - rewrite chunk system - if (nbt == null) { - for (int i = this.levelHeightAccessor.getMinSection(); i < this.levelHeightAccessor.getMaxSection(); i++) { - this.storage.put(getKey(pos, i), Optional.empty()); -@@ -138,7 +142,7 @@ public class SectionStorage implements AutoCloseable { - int j = getVersion(dynamic); - int k = SharedConstants.getCurrentVersion().getDataVersion().getVersion(); - boolean bl = j != k; -- Dynamic dynamic2 = this.simpleRegionStorage.upgradeChunkTag(dynamic, j); -+ Dynamic dynamic2 = null; // Paper - rewrite chunk system - OptionalDynamic optionalDynamic = dynamic2.get("Sections"); - - for (int l = this.levelHeightAccessor.getMinSection(); l < this.levelHeightAccessor.getMaxSection(); l++) { -@@ -162,7 +166,7 @@ public class SectionStorage implements AutoCloseable { - Dynamic dynamic = this.writeColumn(pos, registryOps); - Tag tag = dynamic.getValue(); - if (tag instanceof CompoundTag) { -- this.simpleRegionStorage.write(pos, (CompoundTag)tag); -+ try { this.write(pos, (CompoundTag)tag); } catch (IOException ex) { SectionStorage.LOGGER.error("Error writing poi chunk data to disk for chunk " + pos, ex); } // Paper - nuke IOWorker - } else { - LOGGER.error("Expected compound tag, got {}", tag); - } -@@ -212,7 +216,7 @@ public class SectionStorage implements AutoCloseable { - } - - private static int getVersion(Dynamic dynamic) { -- return dynamic.get("DataVersion").asInt(1945); -+ return dynamic.get("DataVersion").asInt(1945); // Paper - diff on change, constant used in ChunkLoadTask - } - - public void flush(ChunkPos pos) { -@@ -229,6 +233,6 @@ public class SectionStorage implements AutoCloseable { - - @Override - public void close() throws IOException { -- this.simpleRegionStorage.close(); -+ super.close(); // Paper - nuke I/O worker - don't call the worker - } - } -diff --git a/src/main/java/net/minecraft/world/level/entity/EntityTickList.java b/src/main/java/net/minecraft/world/level/entity/EntityTickList.java -index 74a285b8b018a9c94ccea519f1ce8b9e2ef3cb64..83a39f900551e39d5af6f17a339a386ddee4feef 100644 ---- a/src/main/java/net/minecraft/world/level/entity/EntityTickList.java -+++ b/src/main/java/net/minecraft/world/level/entity/EntityTickList.java -@@ -9,52 +9,41 @@ import javax.annotation.Nullable; - import net.minecraft.world.entity.Entity; - - public class EntityTickList { -- private Int2ObjectMap active = new Int2ObjectLinkedOpenHashMap<>(); -- private Int2ObjectMap passive = new Int2ObjectLinkedOpenHashMap<>(); -- @Nullable -- private Int2ObjectMap iterated; -+ private final io.papermc.paper.util.maplist.IteratorSafeOrderedReferenceSet entities = new io.papermc.paper.util.maplist.IteratorSafeOrderedReferenceSet<>(true); // Paper - rewrite this, always keep this updated - why would we EVER tick an entity that's not ticking? - - private void ensureActiveIsNotIterated() { -- if (this.iterated == this.active) { -- this.passive.clear(); -- -- for (Entry entry : Int2ObjectMaps.fastIterable(this.active)) { -- this.passive.put(entry.getIntKey(), entry.getValue()); -- } -- -- Int2ObjectMap int2ObjectMap = this.active; -- this.active = this.passive; -- this.passive = int2ObjectMap; -- } -+ // Paper - replace with better logic, do not delay removals - } - - public void add(Entity entity) { -+ io.papermc.paper.util.TickThread.ensureTickThread("Asynchronous entity ticklist addition"); // Paper - this.ensureActiveIsNotIterated(); -- this.active.put(entity.getId(), entity); -+ this.entities.add(entity); // Paper - replace with better logic, do not delay removals/additions - } - - public void remove(Entity entity) { -+ io.papermc.paper.util.TickThread.ensureTickThread("Asynchronous entity ticklist removal"); // Paper - this.ensureActiveIsNotIterated(); -- this.active.remove(entity.getId()); -+ this.entities.remove(entity); // Paper - replace with better logic, do not delay removals/additions - } - - public boolean contains(Entity entity) { -- return this.active.containsKey(entity.getId()); -+ return this.entities.contains(entity); // Paper - replace with better logic, do not delay removals/additions - } - - public void forEach(Consumer action) { -- if (this.iterated != null) { -- throw new UnsupportedOperationException("Only one concurrent iteration supported"); -- } else { -- this.iterated = this.active; -- -- try { -- for (Entity entity : this.active.values()) { -- action.accept(entity); -- } -- } finally { -- this.iterated = null; -+ io.papermc.paper.util.TickThread.ensureTickThread("Asynchronous entity ticklist iteration"); // Paper -+ // Paper start - replace with better logic, do not delay removals/additions -+ // To ensure nothing weird happens with dimension travelling, do not iterate over new entries... -+ // (by dfl iterator() is configured to not iterate over new entries) -+ io.papermc.paper.util.maplist.IteratorSafeOrderedReferenceSet.Iterator iterator = this.entities.iterator(); -+ try { -+ while (iterator.hasNext()) { -+ action.accept(iterator.next()); - } -+ } finally { -+ iterator.finishedIterating(); - } -+ // Paper end - replace with better logic, do not delay removals/additions - } - } -diff --git a/src/main/java/net/minecraft/world/level/levelgen/NoiseBasedChunkGenerator.java b/src/main/java/net/minecraft/world/level/levelgen/NoiseBasedChunkGenerator.java -index 5d15c228c044a36c67014793decb314240cf6be1..dc765b92cc90f5f370254e68bbbdfa5add7935ce 100644 ---- a/src/main/java/net/minecraft/world/level/levelgen/NoiseBasedChunkGenerator.java -+++ b/src/main/java/net/minecraft/world/level/levelgen/NoiseBasedChunkGenerator.java -@@ -87,7 +87,7 @@ public final class NoiseBasedChunkGenerator extends ChunkGenerator { - return CompletableFuture.supplyAsync(Util.wrapThreadWithTaskName("init_biomes", () -> { - this.doCreateBiomes(blender, noiseConfig, structureAccessor, chunk); - return chunk; -- }), Util.backgroundExecutor()); -+ }), executor); // Paper - run with supplied executor - } - - private void doCreateBiomes(Blender blender, RandomState noiseConfig, StructureManager structureAccessor, ChunkAccess chunk) { -@@ -286,7 +286,7 @@ public final class NoiseBasedChunkGenerator extends ChunkGenerator { - - return CompletableFuture.supplyAsync(Util.wrapThreadWithTaskName("wgen_fill_noise", () -> { - return this.doFill(blender, structureAccessor, noiseConfig, chunk, j, k); -- }), Util.backgroundExecutor()).whenCompleteAsync((ichunkaccess1, throwable) -> { -+ }), executor).whenCompleteAsync((ichunkaccess1, throwable) -> { // Paper - run with supplied executor - Iterator iterator = set.iterator(); - - while (iterator.hasNext()) { -diff --git a/src/main/java/net/minecraft/world/level/levelgen/structure/StructureCheck.java b/src/main/java/net/minecraft/world/level/levelgen/structure/StructureCheck.java -index 609100ed7aa0b23aa5a9c6fbf6878ea320bd3a93..7068657b28a9bc175ee23f5a18defb41168f1d76 100644 ---- a/src/main/java/net/minecraft/world/level/levelgen/structure/StructureCheck.java -+++ b/src/main/java/net/minecraft/world/level/levelgen/structure/StructureCheck.java -@@ -47,8 +47,101 @@ public class StructureCheck { - private final BiomeSource biomeSource; - private final long seed; - private final DataFixer fixerUpper; -- private final Long2ObjectMap> loadedChunks = new Long2ObjectOpenHashMap<>(); -- private final Map featureChecks = new HashMap<>(); -+ // Paper start - rewrite chunk system - synchronise this class -+ // additionally, make sure to purge entries from the maps so it does not leak memory -+ private static final int CHUNK_TOTAL_LIMIT = 50 * (2 * 100 + 1) * (2 * 100 + 1); // cache 50 structure lookups -+ private static final int PER_FEATURE_CHECK_LIMIT = 50 * (2 * 100 + 1) * (2 * 100 + 1); // cache 50 structure lookups -+ -+ private final SynchronisedLong2ObjectMap> loadedChunksSafe = new SynchronisedLong2ObjectMap<>(CHUNK_TOTAL_LIMIT); -+ private final java.util.concurrent.ConcurrentHashMap featureChecksSafe = new java.util.concurrent.ConcurrentHashMap<>(); -+ -+ private static final class SynchronisedLong2ObjectMap { -+ private final it.unimi.dsi.fastutil.longs.Long2ObjectLinkedOpenHashMap map = new it.unimi.dsi.fastutil.longs.Long2ObjectLinkedOpenHashMap<>(); -+ private final int limit; -+ -+ public SynchronisedLong2ObjectMap(final int limit) { -+ this.limit = limit; -+ } -+ -+ // must hold lock on map -+ private void purgeEntries() { -+ while (this.map.size() > this.limit) { -+ this.map.removeLast(); -+ } -+ } -+ -+ public V get(final long key) { -+ synchronized (this.map) { -+ return this.map.getAndMoveToFirst(key); -+ } -+ } -+ -+ public V put(final long key, final V value) { -+ synchronized (this.map) { -+ final V ret = this.map.putAndMoveToFirst(key, value); -+ this.purgeEntries(); -+ return ret; -+ } -+ } -+ -+ public V compute(final long key, final java.util.function.BiFunction remappingFunction) { -+ synchronized (this.map) { -+ // first, compute the value - if one is added, it will be at the last entry -+ this.map.compute(key, remappingFunction); -+ // move the entry to first, just in case it was added at last -+ final V ret = this.map.getAndMoveToFirst(key); -+ // now purge the last entries -+ this.purgeEntries(); -+ -+ return ret; -+ } -+ } -+ } -+ -+ private static final class SynchronisedLong2BooleanMap { -+ private final it.unimi.dsi.fastutil.longs.Long2BooleanLinkedOpenHashMap map = new it.unimi.dsi.fastutil.longs.Long2BooleanLinkedOpenHashMap(); -+ private final int limit; -+ -+ public SynchronisedLong2BooleanMap(final int limit) { -+ this.limit = limit; -+ } -+ -+ // must hold lock on map -+ private void purgeEntries() { -+ while (this.map.size() > this.limit) { -+ this.map.removeLastBoolean(); -+ } -+ } -+ -+ public boolean remove(final long key) { -+ synchronized (this.map) { -+ return this.map.remove(key); -+ } -+ } -+ -+ // note: -+ public boolean getOrCompute(final long key, final it.unimi.dsi.fastutil.longs.Long2BooleanFunction ifAbsent) { -+ synchronized (this.map) { -+ if (this.map.containsKey(key)) { -+ return this.map.getAndMoveToFirst(key); -+ } -+ } -+ -+ final boolean put = ifAbsent.get(key); -+ -+ synchronized (this.map) { -+ if (this.map.containsKey(key)) { -+ return this.map.getAndMoveToFirst(key); -+ } -+ this.map.putAndMoveToFirst(key, put); -+ -+ this.purgeEntries(); -+ -+ return put; -+ } -+ } -+ } -+ // Paper end - rewrite chunk system - synchronise this class - - public StructureCheck( - ChunkScanAccess chunkIoWorker, -@@ -90,7 +183,7 @@ public class StructureCheck { - - public StructureCheckResult checkStart(ChunkPos pos, Structure type, StructurePlacement placement, boolean skipReferencedStructures) { - long l = pos.toLong(); -- Object2IntMap object2IntMap = this.loadedChunks.get(l); -+ Object2IntMap object2IntMap = this.loadedChunksSafe.get(l); // Paper - rewrite chunk system - synchronise this class - if (object2IntMap != null) { - return this.checkStructureInfo(object2IntMap, type, skipReferencedStructures); - } else { -@@ -100,9 +193,9 @@ public class StructureCheck { - } else if (!placement.applyAdditionalChunkRestrictions(pos.x, pos.z, this.seed, this.getSaltOverride(type))) { // Paper - add missing structure seed configs - return StructureCheckResult.START_NOT_PRESENT; - } else { -- boolean bl = this.featureChecks -- .computeIfAbsent(type, structure2 -> new Long2BooleanOpenHashMap()) -- .computeIfAbsent(l, chunkPos -> this.canCreateStructure(pos, type)); -+ boolean bl = this.featureChecksSafe // Paper - rewrite chunk system - synchronise this class -+ .computeIfAbsent(type, structure2 -> new SynchronisedLong2BooleanMap(PER_FEATURE_CHECK_LIMIT)) // Paper - rewrite chunk system - synchronise this class -+ .getOrCompute(l, chunkPos -> this.canCreateStructure(pos, type)); // Paper - rewrite chunk system - synchronise this class - return !bl ? StructureCheckResult.START_NOT_PRESENT : StructureCheckResult.CHUNK_LOAD_NEEDED; - } - } -@@ -228,15 +321,26 @@ public class StructureCheck { - } - - private void storeFullResults(long pos, Object2IntMap referencesByStructure) { -- this.loadedChunks.put(pos, deduplicateEmptyMap(referencesByStructure)); -- this.featureChecks.values().forEach(generationPossibilityByChunkPos -> generationPossibilityByChunkPos.remove(pos)); -+ // Paper start - rewrite chunk system - synchronise this class -+ this.loadedChunksSafe.put(pos, deduplicateEmptyMap(referencesByStructure)); -+ // once we insert into loadedChunks, we don't really need to be very careful about removing everything -+ // from this map, as everything that checks this map uses loadedChunks first -+ // so, one way or another it's a race condition that doesn't matter -+ for (SynchronisedLong2BooleanMap value : this.featureChecksSafe.values()) { -+ value.remove(pos); -+ } -+ // Paper end - rewrite chunk system - synchronise this class - } - - public void incrementReference(ChunkPos pos, Structure structure) { -- this.loadedChunks.compute(pos.toLong(), (posx, referencesByStructure) -> { -- if (referencesByStructure == null || referencesByStructure.isEmpty()) { -+ this.loadedChunksSafe.compute(pos.toLong(), (posx, referencesByStructure) -> { // Paper start - rewrite chunk system - synchronise this class -+ // make this COW so that we do not mutate state that may be currently in use -+ if (referencesByStructure == null) { - referencesByStructure = new Object2IntOpenHashMap<>(); -+ } else { -+ referencesByStructure = referencesByStructure instanceof Object2IntOpenHashMap fastClone ? fastClone.clone() : new Object2IntOpenHashMap<>(referencesByStructure); - } -+ // Paper end - rewrite chunk system - synchronise this class - - referencesByStructure.computeInt(structure, (feature, references) -> references == null ? 1 : references + 1); - return referencesByStructure; -diff --git a/src/main/java/net/minecraft/world/ticks/LevelChunkTicks.java b/src/main/java/net/minecraft/world/ticks/LevelChunkTicks.java -index 47c2b2da9799690291396effb9e1b06d71efc6fd..2cdd18f724296f10cd4a522d1e8196723d39cf45 100644 ---- a/src/main/java/net/minecraft/world/ticks/LevelChunkTicks.java -+++ b/src/main/java/net/minecraft/world/ticks/LevelChunkTicks.java -@@ -26,6 +26,19 @@ public class LevelChunkTicks implements SerializableTickContainer, TickCon - @Nullable - private BiConsumer, ScheduledTick> onTickAdded; - -+ // Paper start - add dirty flag -+ private boolean dirty; -+ private long lastSaved = Long.MIN_VALUE; -+ -+ public boolean isDirty(final long tick) { -+ return this.dirty || (!this.tickQueue.isEmpty() && tick != this.lastSaved); -+ } -+ -+ public void clearDirty() { -+ this.dirty = false; -+ } -+ // Paper end - add dirty flag -+ - public LevelChunkTicks() { - } - -@@ -50,6 +63,7 @@ public class LevelChunkTicks implements SerializableTickContainer, TickCon - public ScheduledTick poll() { - ScheduledTick scheduledTick = this.tickQueue.poll(); - if (scheduledTick != null) { -+ this.dirty = true; // Paper - add dirty flag - this.ticksPerPosition.remove(scheduledTick); - } - -@@ -59,6 +73,7 @@ public class LevelChunkTicks implements SerializableTickContainer, TickCon - @Override - public void schedule(ScheduledTick orderedTick) { - if (this.ticksPerPosition.add(orderedTick)) { -+ this.dirty = true; // Paper - add dirty flag - this.scheduleUnchecked(orderedTick); - } - } -@@ -81,7 +96,7 @@ public class LevelChunkTicks implements SerializableTickContainer, TickCon - while (iterator.hasNext()) { - ScheduledTick scheduledTick = iterator.next(); - if (predicate.test(scheduledTick)) { -- iterator.remove(); -+ iterator.remove(); this.dirty = true; // Paper - add dirty flag - this.ticksPerPosition.remove(scheduledTick); - } - } -@@ -98,6 +113,7 @@ public class LevelChunkTicks implements SerializableTickContainer, TickCon - - @Override - public ListTag save(long l, Function function) { -+ this.lastSaved = l; // Paper - add dirty system to level ticks - ListTag listTag = new ListTag(); - if (this.pendingTicks != null) { - for (SavedTick savedTick : this.pendingTicks) { -@@ -114,6 +130,11 @@ public class LevelChunkTicks implements SerializableTickContainer, TickCon - - public void unpack(long time) { - if (this.pendingTicks != null) { -+ // Paper start - add dirty system to level chunk ticks -+ if (this.tickQueue.isEmpty()) { -+ this.lastSaved = time; -+ } -+ // Paper end - add dirty system to level chunk ticks - int i = -this.pendingTicks.size(); - - for (SavedTick savedTick : this.pendingTicks) { -diff --git a/src/main/java/org/bukkit/craftbukkit/CraftChunk.java b/src/main/java/org/bukkit/craftbukkit/CraftChunk.java -index 36a611d06131be00197c915871b8323544bb4972..bb22473df13f68ac3b45a9c000d1de7260e07792 100644 ---- a/src/main/java/org/bukkit/craftbukkit/CraftChunk.java -+++ b/src/main/java/org/bukkit/craftbukkit/CraftChunk.java -@@ -116,7 +116,7 @@ public class CraftChunk implements Chunk { - - @Override - public boolean isEntitiesLoaded() { -- return this.getCraftWorld().getHandle().entityManager.areEntitiesLoaded(ChunkPos.asLong(this.x, this.z)); -+ return this.getCraftWorld().getHandle().areEntitiesLoaded(io.papermc.paper.util.CoordinateUtils.getChunkKey(this.x, this.z)); // Paper - rewrite chunk system - } - - @Override -@@ -125,51 +125,7 @@ public class CraftChunk implements Chunk { - this.getWorld().getChunkAt(this.x, this.z); // Transient load for this tick - } - -- PersistentEntitySectionManager entityManager = this.getCraftWorld().getHandle().entityManager; -- long pair = ChunkPos.asLong(this.x, this.z); -- -- if (entityManager.areEntitiesLoaded(pair)) { -- return entityManager.getEntities(new ChunkPos(this.x, this.z)).stream() -- .map(net.minecraft.world.entity.Entity::getBukkitEntity) -- .filter(Objects::nonNull).toArray(Entity[]::new); -- } -- -- entityManager.ensureChunkQueuedForLoad(pair); // Start entity loading -- -- // SPIGOT-6772: Use entity mailbox and re-schedule entities if they get unloaded -- ProcessorMailbox mailbox = ((EntityStorage) entityManager.permanentStorage).entityDeserializerQueue; -- BooleanSupplier supplier = () -> { -- // only execute inbox if our entities are not present -- if (entityManager.areEntitiesLoaded(pair)) { -- return true; -- } -- -- if (!entityManager.isPending(pair)) { -- // Our entities got unloaded, this should normally not happen. -- entityManager.ensureChunkQueuedForLoad(pair); // Re-start entity loading -- } -- -- // tick loading inbox, which loads the created entities to the world -- // (if present) -- entityManager.tick(); -- // check if our entities are loaded -- return entityManager.areEntitiesLoaded(pair); -- }; -- -- // now we wait until the entities are loaded, -- // the converting from NBT to entity object is done on the main Thread which is why we wait -- while (!supplier.getAsBoolean()) { -- if (mailbox.size() != 0) { -- mailbox.run(); -- } else { -- Thread.yield(); -- LockSupport.parkNanos("waiting for entity loading", 100000L); -- } -- } -- -- return entityManager.getEntities(new ChunkPos(this.x, this.z)).stream() -- .map(net.minecraft.world.entity.Entity::getBukkitEntity) -- .filter(Objects::nonNull).toArray(Entity[]::new); -+ return this.getCraftWorld().getHandle().getChunkEntities(this.x, this.z); // Paper - rewrite chunk system - } - - @Override -diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java -index 16a736e8327450712630b1659b156da879a57352..0e30a227948464979e12c991b10bd00cf7320399 100644 ---- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java -+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java -@@ -1426,7 +1426,6 @@ public final class CraftServer implements Server { - // Paper - Put world into worldlist before initing the world; move up - - this.getServer().prepareLevels(internal.getChunkSource().chunkMap.progressListener, internal); -- internal.entityManager.tick(); // SPIGOT-6526: Load pending entities so they are available to the API - - this.pluginManager.callEvent(new WorldLoadEvent(internal.getWorld())); - return internal.getWorld(); -@@ -1471,7 +1470,7 @@ public final class CraftServer implements Server { - } - - handle.getChunkSource().close(save); -- handle.entityManager.close(save); // SPIGOT-6722: close entityManager -+ // handle.entityManager.close(save); // SPIGOT-6722: close entityManager // Paper - rewrite chunk system - handle.convertable.close(); - } catch (Exception ex) { - this.getLogger().log(Level.SEVERE, null, ex); -@@ -2507,7 +2506,7 @@ public final class CraftServer implements Server { - - @Override - public boolean isPrimaryThread() { -- return Thread.currentThread().equals(this.console.serverThread) || this.console.hasStopped() || !org.spigotmc.AsyncCatcher.enabled; // All bets are off if we have shut down (e.g. due to watchdog) -+ return io.papermc.paper.util.TickThread.isTickThread(); // Paper - rewrite chunk system - } - - // Paper start - Adventure -diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java -index 7aee9f6b143c89cf8d65ca55eeda808152b4dd26..9c06c3729b09726e1da6ff8fb975cef2aeba9643 100644 ---- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java -+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java -@@ -518,10 +518,14 @@ public class CraftWorld extends CraftRegionAccessor implements World { - ChunkHolder playerChunk = this.world.getChunkSource().chunkMap.getVisibleChunkIfPresent(ChunkPos.asLong(x, z)); - if (playerChunk == null) return false; - -- playerChunk.getTickingChunkFuture().thenAccept(either -> { -- either.ifSuccess(chunk -> { -+ // Paper start - rewrite player chunk loader -+ net.minecraft.world.level.chunk.LevelChunk chunk = playerChunk.getSendingChunk(); -+ if (chunk == null) { -+ return false; -+ } -+ // Paper end - rewrite player chunk loader - List playersInRange = playerChunk.playerProvider.getPlayers(playerChunk.getPos(), false); -- if (playersInRange.isEmpty()) return; -+ if (playersInRange.isEmpty()) return true; // Paper - rewrite player chunk loader - - ClientboundLevelChunkWithLightPacket refreshPacket = new ClientboundLevelChunkWithLightPacket(chunk, this.world.getLightEngine(), null, null); - for (ServerPlayer player : playersInRange) { -@@ -529,8 +533,7 @@ public class CraftWorld extends CraftRegionAccessor implements World { - - player.connection.send(refreshPacket); - } -- }); -- }); -+ // Paper - rewrite player chunk loader - - return true; - } -@@ -634,20 +637,7 @@ public class CraftWorld extends CraftRegionAccessor implements World { - @Override - public Collection getPluginChunkTickets(int x, int z) { - DistanceManager chunkDistanceManager = this.world.getChunkSource().chunkMap.distanceManager; -- SortedArraySet> tickets = chunkDistanceManager.tickets.get(ChunkPos.asLong(x, z)); -- -- if (tickets == null) { -- return Collections.emptyList(); -- } -- -- ImmutableList.Builder ret = ImmutableList.builder(); -- for (Ticket ticket : tickets) { -- if (ticket.getType() == TicketType.PLUGIN_TICKET) { -- ret.add((Plugin) ticket.key); -- } -- } -- -- return ret.build(); -+ return chunkDistanceManager.getChunkHolderManager().getPluginChunkTickets(x, z); // Paper - rewrite chunk system - } - - @Override -@@ -655,7 +645,7 @@ public class CraftWorld extends CraftRegionAccessor implements World { - Map> ret = new HashMap<>(); - DistanceManager chunkDistanceManager = this.world.getChunkSource().chunkMap.distanceManager; - -- for (Long2ObjectMap.Entry>> chunkTickets : chunkDistanceManager.tickets.long2ObjectEntrySet()) { -+ for (Long2ObjectMap.Entry>> chunkTickets : chunkDistanceManager.getChunkHolderManager().getTicketsCopy().long2ObjectEntrySet()) { // Paper - rewrite chunk system - long chunkKey = chunkTickets.getLongKey(); - SortedArraySet> tickets = chunkTickets.getValue(); - -@@ -1352,12 +1342,12 @@ public class CraftWorld extends CraftRegionAccessor implements World { - - @Override - public int getViewDistance() { -- return this.world.getChunkSource().chunkMap.serverViewDistance; -+ return this.getHandle().playerChunkLoader.getAPIViewDistance(); // Paper - replace player chunk loader - } - - @Override - public int getSimulationDistance() { -- return this.world.getChunkSource().chunkMap.getDistanceManager().simulationDistance; -+ return this.getHandle().playerChunkLoader.getAPITickDistance(); // Paper - replace player chunk loader - } - - public BlockMetadataStore getBlockMetadata() { -@@ -2520,17 +2510,20 @@ public class CraftWorld extends CraftRegionAccessor implements World { - - @Override - public void setSimulationDistance(final int simulationDistance) { -- throw new UnsupportedOperationException("Not implemented yet"); -+ if (simulationDistance < 2 || simulationDistance > 32) { -+ throw new IllegalArgumentException("Simulation distance " + simulationDistance + " is out of range of [2, 32]"); -+ } -+ this.getHandle().chunkSource.chunkMap.setTickViewDistance(simulationDistance); - } - - @Override - public int getSendViewDistance() { -- return this.getViewDistance(); -+ return this.getHandle().playerChunkLoader.getAPISendViewDistance(); // Paper - replace player chunk loader - } - - @Override - public void setSendViewDistance(final int viewDistance) { -- throw new UnsupportedOperationException("Not implemented yet"); -+ this.getHandle().chunkSource.chunkMap.setSendViewDistance(viewDistance); // Paper - replace player chunk loader - } - - // Paper start - implement pointers -diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java -index 68a0b6b8650e9e80e8e8c4037d92389cae899d72..9aec6efef4094bbdb920101df1a7a5a2a6070dde 100644 ---- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java -+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java -@@ -3463,31 +3463,31 @@ public class CraftPlayer extends CraftHumanEntity implements Player { - - @Override - public int getViewDistance() { -- return io.papermc.paper.chunk.system.ChunkSystem.getLoadViewDistance(this.getHandle()); -+ return io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.getAPIViewDistance(this); - } - - @Override - public void setViewDistance(final int viewDistance) { -- throw new UnsupportedOperationException("Not implemented yet"); -+ this.getHandle().setLoadViewDistance(viewDistance < 0 ? viewDistance : viewDistance + 1); - } - - @Override - public int getSimulationDistance() { -- return io.papermc.paper.chunk.system.ChunkSystem.getTickViewDistance(this.getHandle()); -+ return io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.getAPITickViewDistance(this); - } - - @Override - public void setSimulationDistance(final int simulationDistance) { -- throw new UnsupportedOperationException("Not implemented yet"); -+ this.getHandle().setTickViewDistance(simulationDistance); - } - - @Override - public int getSendViewDistance() { -- return io.papermc.paper.chunk.system.ChunkSystem.getSendViewDistance(this.getHandle()); -+ return io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.getAPISendViewDistance(this); - } - - @Override - public void setSendViewDistance(final int viewDistance) { -- throw new UnsupportedOperationException("Not implemented yet"); -+ this.getHandle().setSendViewDistance(viewDistance); - } - } -diff --git a/src/main/java/org/bukkit/craftbukkit/generator/CustomChunkGenerator.java b/src/main/java/org/bukkit/craftbukkit/generator/CustomChunkGenerator.java -index b65710b648e31ab74204b5abd9397d9e6e26dac4..c77f722131e0e40e9de29bf8d42f9bc5d8fa2f7d 100644 ---- a/src/main/java/org/bukkit/craftbukkit/generator/CustomChunkGenerator.java -+++ b/src/main/java/org/bukkit/craftbukkit/generator/CustomChunkGenerator.java -@@ -264,7 +264,7 @@ public class CustomChunkGenerator extends InternalChunkGenerator { - return ichunkaccess1; - }; - -- return future == null ? CompletableFuture.supplyAsync(() -> function.apply(chunk), net.minecraft.Util.backgroundExecutor()) : future.thenApply(function); -+ return future == null ? CompletableFuture.supplyAsync(() -> function.apply(chunk), executor) : future.thenApply(function); // Paper - run with supplied executor - } - - @Override -diff --git a/src/main/java/org/bukkit/craftbukkit/util/DelegatedGeneratorAccess.java b/src/main/java/org/bukkit/craftbukkit/util/DelegatedGeneratorAccess.java -index cd7f1309cf01a5f01a28aded03a36fe15adb1756..41a291d42667c38d3e5bbe47236772761e85929b 100644 ---- a/src/main/java/org/bukkit/craftbukkit/util/DelegatedGeneratorAccess.java -+++ b/src/main/java/org/bukkit/craftbukkit/util/DelegatedGeneratorAccess.java -@@ -815,19 +815,39 @@ public abstract class DelegatedGeneratorAccess implements WorldGenLevel { - @Nullable - @Override - public BlockState getBlockStateIfLoaded(final BlockPos blockposition) { -- return null; -+ return this.handle.getBlockStateIfLoaded(blockposition); - } - - @Nullable - @Override - public FluidState getFluidIfLoaded(final BlockPos blockposition) { -- return null; -+ return this.handle.getFluidIfLoaded(blockposition); - } - - @Nullable - @Override - public ChunkAccess getChunkIfLoadedImmediately(final int x, final int z) { -- return null; -+ return this.handle.getChunkIfLoadedImmediately(x, z); -+ } -+ -+ @Override -+ public void getHardCollidingEntities(final Entity except, final AABB box, final Predicate predicate, final List into) { -+ this.handle.getHardCollidingEntities(except, box, predicate, into); -+ } -+ -+ @Override -+ public List getHardCollidingEntities(final Entity except, final AABB box, final Predicate predicate) { -+ return this.handle.getHardCollidingEntities(except, box, predicate); -+ } -+ -+ @Override -+ public void getEntities(final Entity except, final AABB box, final Predicate predicate, final List into) { -+ this.handle.getEntities(except, box, predicate, into); -+ } -+ -+ @Override -+ public void getEntitiesByClass(final Class clazz, final Entity except, final AABB box, final List into, final Predicate predicate) { -+ this.handle.getEntitiesByClass(clazz, except, box, into, predicate); - } - // Paper end - } -diff --git a/src/main/java/org/bukkit/craftbukkit/util/DummyGeneratorAccess.java b/src/main/java/org/bukkit/craftbukkit/util/DummyGeneratorAccess.java -index e8a73d34dbb372581b03018aade170a31c266099..210f454a840aa5564f7cbf33b83d31aa74814c84 100644 ---- a/src/main/java/org/bukkit/craftbukkit/util/DummyGeneratorAccess.java -+++ b/src/main/java/org/bukkit/craftbukkit/util/DummyGeneratorAccess.java -@@ -268,4 +268,19 @@ public class DummyGeneratorAccess implements WorldGenLevel { - @Override - public void scheduleTick(BlockPos pos, Fluid fluid, int delay, net.minecraft.world.ticks.TickPriority priority) {} - // Paper end - add more methods -+ // Paper start -+ @Override -+ public List getHardCollidingEntities(Entity except, AABB box, Predicate predicate) { -+ return java.util.Collections.emptyList(); -+ } -+ -+ @Override -+ public void getEntities(Entity except, AABB box, Predicate predicate, List into) {} -+ -+ @Override -+ public void getHardCollidingEntities(Entity except, AABB box, Predicate predicate, List into) {} -+ -+ @Override -+ public void getEntitiesByClass(Class clazz, Entity except, AABB box, List into, Predicate predicate) {} -+ // Paper end - } -diff --git a/src/main/java/org/spigotmc/AsyncCatcher.java b/src/main/java/org/spigotmc/AsyncCatcher.java -index e8e3cc48cf1c58bd8151d1f28df28781859cd0e3..2e074c16dab1ead47914070329da0398c3274048 100644 ---- a/src/main/java/org/spigotmc/AsyncCatcher.java -+++ b/src/main/java/org/spigotmc/AsyncCatcher.java -@@ -9,7 +9,7 @@ public class AsyncCatcher - - public static void catchOp(String reason) - { -- if ( (AsyncCatcher.enabled || io.papermc.paper.util.TickThread.STRICT_THREAD_CHECKS) && Thread.currentThread() != MinecraftServer.getServer().serverThread ) // Paper -+ if (!(io.papermc.paper.util.TickThread.isTickThread())) // Paper - { - MinecraftServer.LOGGER.error("Thread " + Thread.currentThread().getName() + " failed main thread check: " + reason, new Throwable()); // Paper - throw new IllegalStateException( "Asynchronous " + reason + "!" ); -diff --git a/src/main/java/org/spigotmc/WatchdogThread.java b/src/main/java/org/spigotmc/WatchdogThread.java -index ad282d34919716b75acd10426cd071da9d064a51..9e5d08f57aa448552d100ca892c211d44441ef68 100644 ---- a/src/main/java/org/spigotmc/WatchdogThread.java -+++ b/src/main/java/org/spigotmc/WatchdogThread.java -@@ -8,7 +8,7 @@ import java.util.logging.Logger; - import net.minecraft.server.MinecraftServer; - import org.bukkit.Bukkit; - --public class WatchdogThread extends Thread -+public final class WatchdogThread extends io.papermc.paper.util.TickThread // Paper - rewrite chunk system - { - - private static WatchdogThread instance; -@@ -115,6 +115,7 @@ public class WatchdogThread extends Thread - // Paper end - Different message for short timeout - log.log( Level.SEVERE, "------------------------------" ); - log.log( Level.SEVERE, "Server thread dump (Look for plugins here before reporting to Paper!):" ); // Paper -+ io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.dumpAllChunkLoadInfo(isLongTimeout); // Paper - rewrite chunk system - WatchdogThread.dumpThread( ManagementFactory.getThreadMXBean().getThreadInfo( MinecraftServer.getServer().serverThread.getId(), Integer.MAX_VALUE ), log ); - log.log( Level.SEVERE, "------------------------------" ); - // diff --git a/patches/later/0277-Improve-exact-choice-recipe-ingredients.patch b/patches/unapplied/server/0277-Improve-exact-choice-recipe-ingredients.patch similarity index 100% rename from patches/later/0277-Improve-exact-choice-recipe-ingredients.patch rename to patches/unapplied/server/0277-Improve-exact-choice-recipe-ingredients.patch diff --git a/patches/later/0451-Fix-harming-potion-dupe.patch b/patches/unapplied/server/0451-Fix-harming-potion-dupe.patch similarity index 100% rename from patches/later/0451-Fix-harming-potion-dupe.patch rename to patches/unapplied/server/0451-Fix-harming-potion-dupe.patch diff --git a/patches/later/0777-Fix-inconsistencies-in-dispense-events-regarding-sta.patch b/patches/unapplied/server/0777-Fix-inconsistencies-in-dispense-events-regarding-sta.patch similarity index 100% rename from patches/later/0777-Fix-inconsistencies-in-dispense-events-regarding-sta.patch rename to patches/unapplied/server/0777-Fix-inconsistencies-in-dispense-events-regarding-sta.patch diff --git a/patches/later/0845-API-for-updating-recipes-on-clients.patch b/patches/unapplied/server/0845-API-for-updating-recipes-on-clients.patch similarity index 100% rename from patches/later/0845-API-for-updating-recipes-on-clients.patch rename to patches/unapplied/server/0845-API-for-updating-recipes-on-clients.patch diff --git a/patches/later/0986-Strip-raytracing-for-EntityLiving-hasLineOfSight.patch b/patches/unapplied/server/0986-Strip-raytracing-for-EntityLiving-hasLineOfSight.patch similarity index 100% rename from patches/later/0986-Strip-raytracing-for-EntityLiving-hasLineOfSight.patch rename to patches/unapplied/server/0986-Strip-raytracing-for-EntityLiving-hasLineOfSight.patch