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c5a10665b8
Spigot still maintains some partial implementation of "tick skipping", a practice in which the MinecraftServer.currentTick field is updated not by an increment of one per actual tick, but instead set to System.currentTimeMillis() / 50. This behaviour means that the tracked tick may "skip" a tick value in case a previous tick took more than the expected 50ms. To compensate for this in important paths, spigot/craftbukkit implements "wall-time". Instead of incrementing/decrementing ticks on block entities/entities by one for each call to their tick() method, they instead increment/decrement important values, like an ItemEntity's age or pickupDelay, by the difference of `currentTick - lastTick`, where `lastTick` is the value of `currentTick` during the last tick() call. These "fixes" however do not play nicely with minecraft's simulation distance as entities/block entities implementing the above behaviour would "catch up" their values when moving from a non-ticking chunk to a ticking one as their `lastTick` value remains stuck on the last tick in a ticking chunk and hence lead to a large "catch up" once ticked again. Paper completely removes the "tick skipping" behaviour (See patch "Further-improve-server-tick-loop"), making the above precautions completely unnecessary, which also rids paper of the previous described incompatibility with non-ticking chunks.
45 lines
2.3 KiB
Diff
45 lines
2.3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Jason Penilla <11360596+jpenilla@users.noreply.github.com>
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Date: Tue, 18 Jun 2024 12:43:06 -0700
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Subject: [PATCH] Fix CraftWorld#isChunkGenerated
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The upstream implementation is returning true for non-full chunks.
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diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
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index 8221597951c5e768fa8af23adc1a57871c76f3a6..90d4834f97d3ba996d46493246b1947511553424 100644
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--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
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+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
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@@ -372,11 +372,28 @@ public class CraftWorld extends CraftRegionAccessor implements World {
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@Override
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public boolean isChunkGenerated(int x, int z) {
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- try {
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- return this.isChunkLoaded(x, z) || this.world.getChunkSource().chunkMap.read(new ChunkPos(x, z)).get().isPresent();
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- } catch (InterruptedException | ExecutionException ex) {
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- throw new RuntimeException(ex);
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+ // Paper start - Fix this method
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+ if (!Bukkit.isPrimaryThread()) {
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+ return java.util.concurrent.CompletableFuture.supplyAsync(() -> {
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+ return CraftWorld.this.isChunkGenerated(x, z);
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+ }, world.getChunkSource().mainThreadProcessor).join();
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+ }
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+ ChunkAccess chunk = world.getChunkSource().getChunkAtImmediately(x, z);
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+ if (chunk != null) {
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+ return chunk instanceof ImposterProtoChunk || chunk instanceof net.minecraft.world.level.chunk.LevelChunk;
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}
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+ final java.util.concurrent.CompletableFuture<ChunkAccess> future = new java.util.concurrent.CompletableFuture<>();
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+ ca.spottedleaf.moonrise.common.util.ChunkSystem.scheduleChunkLoad(
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+ this.world, x, z, false, ChunkStatus.EMPTY, true, ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority.NORMAL, future::complete
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+ );
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+ world.getChunkSource().mainThreadProcessor.managedBlock(future::isDone);
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+ return future.thenApply(c -> {
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+ if (c != null) {
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+ return c.getPersistedStatus() == ChunkStatus.FULL;
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+ }
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+ return false;
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+ }).join();
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+ // Paper end - Fix this method
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}
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@Override
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