PaperMC/Spigot-Server-Patches/Prevent-consuming-the-wrong-itemstack.patch
Aikar fd5c98a9ef Optimize Network Manager to not need synchronization
Removes synchronization from sending packets
Makes normal packet sends no longer need to be wrapped and queued like it use to work.
Adds more packet queue immunities on top of keep alive to let the following scenarios go out
without delay:
  - Keep Alive
  - Chat
  - Kick
  - All of the packets during the Player Joined World event

Hoping that latter one helps join timeout issues more too for slow connections.

Removes processing packet queue off of main thread
  - for the few cases where it is allowed, order is not necessary nor
    should it even be happening concurrently in first place (handshaking/login/status)

Ensures packets sent asynchronously are dispatched on main thread

This helps ensure safety for ProtocolLib as packet listeners
are commonly accessing world state. This will allow you to schedule
a packet to be sent async, but itll be dispatched sync for packet
listeners to process.

This should solve some deadlock risks

This may provide a decent performance improvement because thread synchronization incurs a cache reset
so by avoiding ever entering a synchronized block, we get to avoid that, and packet sending is a really
hot activity.
2020-05-06 05:22:03 -04:00

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Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: kickash32 <kickash32@gmail.com>
Date: Mon, 19 Aug 2019 19:42:35 +0500
Subject: [PATCH] Prevent consuming the wrong itemstack
diff --git a/src/main/java/net/minecraft/server/EntityLiving.java b/src/main/java/net/minecraft/server/EntityLiving.java
index aecd5011cbe..24594aa0e9b 100644
--- a/src/main/java/net/minecraft/server/EntityLiving.java
+++ b/src/main/java/net/minecraft/server/EntityLiving.java
@@ -0,0 +0,0 @@ public abstract class EntityLiving extends Entity {
this.datawatcher.set(EntityLiving.ao, (byte) j);
}
- public void c(EnumHand enumhand) {
+ // Paper start -- OBFHELPER and forwarder to method with forceUpdate parameter
+ public void c(EnumHand enumhand) { this.updateActiveItem(enumhand, false); }
+ public void updateActiveItem(EnumHand enumhand, boolean forceUpdate) {
+ // Paper end
ItemStack itemstack = this.b(enumhand);
- if (!itemstack.isEmpty() && !this.isHandRaised()) {
+ if (!itemstack.isEmpty() && !this.isHandRaised() || forceUpdate) { // Paper use override flag
this.activeItem = itemstack;
this.bl = itemstack.k();
if (!this.world.isClientSide) {
@@ -0,0 +0,0 @@ public abstract class EntityLiving extends Entity {
this.clearActiveItem();
} else {
if (!this.activeItem.isEmpty() && this.isHandRaised()) {
+ this.updateActiveItem(this.getRaisedHand(), true); // Paper
this.b(this.activeItem, 16);
// CraftBukkit start - fire PlayerItemConsumeEvent
ItemStack itemstack;
@@ -0,0 +0,0 @@ public abstract class EntityLiving extends Entity {
this.a(this.getRaisedHand(), itemstack);
// CraftBukkit end
this.dH();
- // Paper start - if the replacement is anything but the default, update the client inventory
- if (this instanceof EntityPlayer && !com.google.common.base.Objects.equal(defaultReplacement, itemstack)) {
+ // Paper start
+ if (this instanceof EntityPlayer) {
((EntityPlayer) this).getBukkitEntity().updateInventory();
}
// Paper end
--