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8c5b837e05
Firstly, the old methods all routed to the CompletableFuture method. However, the CF method could not guarantee that if the caller was off-main that the future would be "completed" on-main. Since the callback methods used the CF one, this meant that the callback methods did not guarantee that the callbacks were to be called on the main thread. Now, all methods route to getChunkAtAsync(x, z, gen, urgent, cb) so that the methods with the callback are guaranteed to invoke the callback on the main thread. The CF behavior remains unchanged; it may still appear to complete on main if invoked off-main. Secondly, remove the scheduleOnMain invocation in the async chunk completion. This unnecessarily delays the callback by 1 tick. Thirdly, add getChunksAtAsync(minX, minZ, maxX, maxZ, ...) which will load chunks within an area. This method is provided as a helper as keeping all chunks loaded within an area can be complicated to implement for plugins (due to the lacking ticket API), and is already implemented internally anyways. Fourthly, remove the ticket addition that occured with getChunkAt and getChunkAtAsync. The ticket addition may delay the unloading of the chunk unnecessarily. It also fixes a very rare timing bug where the future/callback would be completed after the chunk unloads.
78 lines
4.4 KiB
Diff
78 lines
4.4 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Jake Potrebic <jake.m.potrebic@gmail.com>
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Date: Tue, 22 Mar 2022 12:44:30 -0700
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Subject: [PATCH] Throw exception on world create while being ticked
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There are no plans to support creating worlds while worlds are
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being ticked themselvess.
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diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
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index 57c52a30d284332361f28d6138d3c5f1fc6d52bd..25e2baf2109b27887e4b3631d948907d9d8d65a2 100644
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--- a/src/main/java/net/minecraft/server/MinecraftServer.java
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+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
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@@ -327,6 +327,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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public final double[] recentTps = new double[ 3 ];
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// Spigot end
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public final io.papermc.paper.configuration.PaperConfigurations paperConfigurations; // Paper - add paper configuration files
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+ public boolean isIteratingOverLevels = false; // Paper - Throw exception on world create while being ticked
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public static <S extends MinecraftServer> S spin(Function<Thread, S> serverFactory) {
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AtomicReference<S> atomicreference = new AtomicReference();
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@@ -1626,7 +1627,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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gameprofilerfiller.push("commandFunctions");
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this.getFunctions().tick();
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gameprofilerfiller.popPush("levels");
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- Iterator iterator = this.getAllLevels().iterator();
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+ //Iterator iterator = this.getAllLevels().iterator(); // Paper - Throw exception on world create while being ticked; moved down
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// CraftBukkit start
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// Run tasks that are waiting on processing
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@@ -1654,6 +1655,8 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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}
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}
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+ this.isIteratingOverLevels = true; // Paper - Throw exception on world create while being ticked
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+ Iterator iterator = this.getAllLevels().iterator(); // Paper - Throw exception on world create while being ticked; move down
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while (iterator.hasNext()) {
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ServerLevel worldserver = (ServerLevel) iterator.next();
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worldserver.hasPhysicsEvent = org.bukkit.event.block.BlockPhysicsEvent.getHandlerList().getRegisteredListeners().length > 0; // Paper - BlockPhysicsEvent
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@@ -1687,6 +1690,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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gameprofilerfiller.pop();
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worldserver.explosionDensityCache.clear(); // Paper - Optimize explosions
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}
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+ this.isIteratingOverLevels = false; // Paper - Throw exception on world create while being ticked
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gameprofilerfiller.popPush("connection");
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this.tickConnection();
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diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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index 4b894223387bf4029bbfa15d9605247935d7f829..557eb1a75a3115c3215315deae56a42d665693df 100644
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--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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@@ -919,6 +919,11 @@ public final class CraftServer implements Server {
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return new ArrayList<World>(this.worlds.values());
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}
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+ @Override
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+ public boolean isTickingWorlds() {
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+ return console.isIteratingOverLevels;
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+ }
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+
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public DedicatedPlayerList getHandle() {
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return this.playerList;
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}
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@@ -1182,6 +1187,7 @@ public final class CraftServer implements Server {
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@Override
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public World createWorld(WorldCreator creator) {
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Preconditions.checkState(this.console.getAllLevels().iterator().hasNext(), "Cannot create additional worlds on STARTUP");
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+ //Preconditions.checkState(!this.console.isIteratingOverLevels, "Cannot create a world while worlds are being ticked"); // Paper - Cat - Temp disable. We'll see how this goes.
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Preconditions.checkArgument(creator != null, "WorldCreator cannot be null");
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String name = creator.name();
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@@ -1358,6 +1364,7 @@ public final class CraftServer implements Server {
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@Override
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public boolean unloadWorld(World world, boolean save) {
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+ //Preconditions.checkState(!this.console.isIteratingOverLevels, "Cannot unload a world while worlds are being ticked"); // Paper - Cat - Temp disable. We'll see how this goes.
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if (world == null) {
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return false;
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}
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