mirror of
https://github.com/PaperMC/Paper.git
synced 2024-11-30 06:24:06 +01:00
70 lines
3.6 KiB
Diff
70 lines
3.6 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Aikar <aikar@aikar.co>
|
|
Date: Mon, 6 Jul 2020 18:36:41 -0400
|
|
Subject: [PATCH] Fix Concurrency issue in ShufflingList
|
|
|
|
if multiple threads from worldgen sort at same time, it will crash.
|
|
So make a copy of the list for sorting purposes.
|
|
|
|
diff --git a/src/main/java/net/minecraft/world/entity/ai/behavior/GateBehavior.java b/src/main/java/net/minecraft/world/entity/ai/behavior/GateBehavior.java
|
|
index 419eadbe31b86b7192fd7a63268d547705e7c7ce..b45c4f50705f80163d44d9e588f86a5770f5be38 100644
|
|
--- a/src/main/java/net/minecraft/world/entity/ai/behavior/GateBehavior.java
|
|
+++ b/src/main/java/net/minecraft/world/entity/ai/behavior/GateBehavior.java
|
|
@@ -17,7 +17,7 @@ public class GateBehavior<E extends LivingEntity> implements BehaviorControl<E>
|
|
private final Set<MemoryModuleType<?>> exitErasedMemories;
|
|
private final GateBehavior.OrderPolicy orderPolicy;
|
|
private final GateBehavior.RunningPolicy runningPolicy;
|
|
- private final ShufflingList<BehaviorControl<? super E>> behaviors = new ShufflingList<>();
|
|
+ private final ShufflingList<BehaviorControl<? super E>> behaviors = new ShufflingList<>(false); // Paper - don't use a clone
|
|
private Behavior.Status status = Behavior.Status.STOPPED;
|
|
|
|
public GateBehavior(Map<MemoryModuleType<?>, MemoryStatus> requiredMemoryState, Set<MemoryModuleType<?>> memoriesToForgetWhenStopped, GateBehavior.OrderPolicy order, GateBehavior.RunningPolicy runMode, List<Pair<? extends BehaviorControl<? super E>, Integer>> tasks) {
|
|
diff --git a/src/main/java/net/minecraft/world/entity/ai/behavior/ShufflingList.java b/src/main/java/net/minecraft/world/entity/ai/behavior/ShufflingList.java
|
|
index 9fb20cd00568aeea25284ea0e80fe52cb1c3eede..731ef21dbbd25d6924717de42f4569a9b5935643 100644
|
|
--- a/src/main/java/net/minecraft/world/entity/ai/behavior/ShufflingList.java
|
|
+++ b/src/main/java/net/minecraft/world/entity/ai/behavior/ShufflingList.java
|
|
@@ -16,12 +16,25 @@ import net.minecraft.util.RandomSource;
|
|
public class ShufflingList<U> implements Iterable<U> {
|
|
protected final List<ShufflingList.WeightedEntry<U>> entries;
|
|
private final RandomSource random = RandomSource.create();
|
|
+ private final boolean isUnsafe; // Paper
|
|
|
|
public ShufflingList() {
|
|
+ // Paper start
|
|
+ this(true);
|
|
+ }
|
|
+ public ShufflingList(boolean isUnsafe) {
|
|
+ this.isUnsafe = isUnsafe;
|
|
+ // Paper end
|
|
this.entries = Lists.newArrayList();
|
|
}
|
|
|
|
private ShufflingList(List<ShufflingList.WeightedEntry<U>> list) {
|
|
+ // Paper start
|
|
+ this(list, true);
|
|
+ }
|
|
+ private ShufflingList(List<ShufflingList.WeightedEntry<U>> list, boolean isUnsafe) {
|
|
+ this.isUnsafe = isUnsafe;
|
|
+ // Paper end
|
|
this.entries = Lists.newArrayList(list);
|
|
}
|
|
|
|
@@ -37,11 +50,12 @@ public class ShufflingList<U> implements Iterable<U> {
|
|
}
|
|
|
|
public ShufflingList<U> shuffle() {
|
|
- this.entries.forEach((entry) -> {
|
|
- entry.setRandom(this.random.nextFloat());
|
|
- });
|
|
- this.entries.sort(Comparator.comparingDouble(ShufflingList.WeightedEntry::getRandWeight));
|
|
- return this;
|
|
+ // Paper start - make concurrent safe, work off a clone of the list
|
|
+ List<ShufflingList.WeightedEntry<U>> list = this.isUnsafe ? Lists.newArrayList(this.entries) : this.entries;
|
|
+ list.forEach(entry -> entry.setRandom(this.random.nextFloat()));
|
|
+ list.sort(Comparator.comparingDouble(ShufflingList.WeightedEntry::getRandWeight));
|
|
+ return this.isUnsafe ? new ShufflingList<>(list, this.isUnsafe) : this;
|
|
+ // Paper end
|
|
}
|
|
|
|
public Stream<U> stream() {
|