mirror of
https://github.com/PaperMC/Paper.git
synced 2024-11-01 00:10:32 +01:00
92 lines
4.4 KiB
Diff
92 lines
4.4 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Aikar <aikar@aikar.co>
|
|
Date: Fri, 29 May 2020 20:29:02 -0400
|
|
Subject: [PATCH] Synchronize PalettedContainer instead of
|
|
ThreadingDetector/Semaphore
|
|
|
|
Mojang has flaws in their logic about chunks being concurrently
|
|
wrote to. So we constantly see crashes around multiple threads writing.
|
|
|
|
Additionally, java has optimized synchronization so well that its
|
|
in many times faster than trying to manage read write locks for low
|
|
contention situations.
|
|
|
|
And this is extremely a low contention situation.
|
|
|
|
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 b688d239ff11b315f60cd980d8f6780b982a865b..d93118b7a602ceb6ef11ddabbce1d13fb8029a44 100644
|
|
--- a/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java
|
|
+++ b/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java
|
|
@@ -32,14 +32,14 @@ public class PalettedContainer<T> implements PaletteResize<T>, PalettedContainer
|
|
private final T @org.jetbrains.annotations.Nullable [] presetValues; // Paper - Anti-Xray - Add preset values
|
|
private volatile PalettedContainer.Data<T> data;
|
|
private final PalettedContainer.Strategy strategy;
|
|
- private final ThreadingDetector threadingDetector = new ThreadingDetector("PalettedContainer");
|
|
+ // private final ThreadingDetector threadingDetector = new ThreadingDetector("PalettedContainer"); // Paper - unused
|
|
|
|
public void acquire() {
|
|
- this.threadingDetector.checkAndLock();
|
|
+ // this.threadingDetector.checkAndLock(); // Paper - disable this - use proper synchronization
|
|
}
|
|
|
|
public void release() {
|
|
- this.threadingDetector.checkAndUnlock();
|
|
+ // this.threadingDetector.checkAndUnlock(); // Paper - disable this
|
|
}
|
|
|
|
// Paper start - Anti-Xray - Add preset values
|
|
@@ -129,7 +129,7 @@ public class PalettedContainer<T> implements PaletteResize<T>, PalettedContainer
|
|
}
|
|
|
|
@Override
|
|
- public int onResize(int newBits, T object) {
|
|
+ public synchronized int onResize(int newBits, T object) { // Paper - synchronize
|
|
PalettedContainer.Data<T> data = this.data;
|
|
|
|
// Paper start - Anti-Xray - Add preset values
|
|
@@ -176,7 +176,7 @@ public class PalettedContainer<T> implements PaletteResize<T>, PalettedContainer
|
|
return this.getAndSet(this.strategy.getIndex(x, y, z), value);
|
|
}
|
|
|
|
- private T getAndSet(int index, T value) {
|
|
+ private synchronized T getAndSet(int index, T value) { // Paper - synchronize
|
|
int i = this.data.palette.idFor(value);
|
|
int j = this.data.storage.getAndSet(index, i);
|
|
return this.data.palette.valueFor(j);
|
|
@@ -193,7 +193,7 @@ public class PalettedContainer<T> implements PaletteResize<T>, PalettedContainer
|
|
|
|
}
|
|
|
|
- private void set(int index, T value) {
|
|
+ private synchronized void set(int index, T value) { // Paper - synchronize
|
|
int i = this.data.palette.idFor(value);
|
|
this.data.storage.set(index, i);
|
|
}
|
|
@@ -218,7 +218,7 @@ public class PalettedContainer<T> implements PaletteResize<T>, PalettedContainer
|
|
});
|
|
}
|
|
|
|
- public void read(FriendlyByteBuf buf) {
|
|
+ public synchronized void read(FriendlyByteBuf buf) { // Paper - synchronize
|
|
this.acquire();
|
|
|
|
try {
|
|
@@ -238,7 +238,7 @@ public class PalettedContainer<T> implements PaletteResize<T>, PalettedContainer
|
|
@Override
|
|
@Deprecated @io.papermc.paper.annotation.DoNotUse public void write(FriendlyByteBuf buf) { this.write(buf, null, 0); }
|
|
@Override
|
|
- public void write(FriendlyByteBuf buf, @Nullable com.destroystokyo.paper.antixray.ChunkPacketInfo<T> chunkPacketInfo, int bottomBlockY) {
|
|
+ public synchronized void write(FriendlyByteBuf buf, @Nullable com.destroystokyo.paper.antixray.ChunkPacketInfo<T> chunkPacketInfo, int bottomBlockY) { // Paper - synchronize
|
|
this.acquire();
|
|
|
|
try {
|
|
@@ -296,7 +296,7 @@ public class PalettedContainer<T> implements PaletteResize<T>, PalettedContainer
|
|
}
|
|
|
|
@Override
|
|
- public PalettedContainerRO.PackedData<T> pack(IdMap<T> idList, PalettedContainer.Strategy paletteProvider) {
|
|
+ public synchronized PalettedContainerRO.PackedData<T> pack(IdMap<T> idList, PalettedContainer.Strategy paletteProvider) { // Paper - synchronize
|
|
this.acquire();
|
|
|
|
PalettedContainerRO.PackedData var12;
|