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4104545b11
"It was from a different time before books were as jank as they are now. As time has gone on they've only proven to be worse and worse."
52 lines
2.3 KiB
Diff
52 lines
2.3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Tue, 21 Apr 2020 03:51:53 -0400
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Subject: [PATCH] Allow multiple callbacks to schedule for Callback Executor
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ChunkMapDistance polls multiple entries for pendingChunkUpdates
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Each of these have the potential to move a chunk in and out of
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"Loaded" state, which will result in multiple callbacks being
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needed within a single tick of ChunkMapDistance
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Use an ArrayDeque to store this Queue
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We make sure to also implement a pattern that is recursion safe too.
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diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
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index c1b7e9d515fc833759707ab3c5c952320dec103e..c643919e17081c85717b0b00c227b914d7abcc0a 100644
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--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
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+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
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@@ -178,17 +178,29 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
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public final CallbackExecutor callbackExecutor = new CallbackExecutor();
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public static final class CallbackExecutor implements java.util.concurrent.Executor, Runnable {
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- private final java.util.Queue<Runnable> queue = new java.util.ArrayDeque<>();
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+ // Paper start - replace impl with recursive safe multi entry queue
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+ // it's possible to schedule multiple tasks currently, so it's vital we change this impl
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+ // If we recurse into the executor again, we will append to another queue, ensuring task order consistency
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+ private java.util.Queue<Runnable> queue = new java.util.ArrayDeque<>(); // Paper - remove final
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@Override
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public void execute(Runnable runnable) {
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+ if (this.queue == null) {
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+ this.queue = new java.util.ArrayDeque<>();
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+ }
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this.queue.add(runnable);
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}
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@Override
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public void run() {
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+ if (this.queue == null) {
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+ return;
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+ }
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+ java.util.Queue<Runnable> queue = this.queue;
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+ this.queue = null;
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+ // Paper end
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Runnable task;
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- while ((task = this.queue.poll()) != null) {
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+ while ((task = queue.poll()) != null) { // Paper
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task.run();
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}
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}
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