Synchronization

- Make PonderRegistry use a ThreadLocal current namespace
- Add synchronized blocks to some methods that modify maps or lists
- Move some non-thread safe method calls to the event.enqueueWork
lambdas

src/main/java/com/simibubi/create/Create.java

@@ -109,6 +109,7 @@ public class Create {
 		modEventBus.addListener(AllConfigs::onReload);
 		modEventBus.addListener(EventPriority.LOWEST, this::gatherData);
 		forgeEventBus.addListener(EventPriority.HIGH, Create::onBiomeLoad);
+		forgeEventBus.register(CHUNK_UTIL);
 
 		DistExecutor.unsafeRunWhenOn(Dist.CLIENT,
 			() -> () -> CreateClient.addClientListeners(forgeEventBus, modEventBus));
@@ -116,16 +117,14 @@ public class Create {
 
 	public static void init(final FMLCommonSetupEvent event) {
 		CapabilityMinecartController.register();
-		SchematicInstances.register();
-
-		CHUNK_UTIL.init();
-		MinecraftForge.EVENT_BUS.register(CHUNK_UTIL);
-
 		AllPackets.registerPackets();
-		AllTriggers.register();
+		SchematicInstances.register();
 		PotatoCannonProjectileTypes.register();
 
+		CHUNK_UTIL.init();
+
 		event.enqueueWork(() -> {
+			AllTriggers.register();
 			SchematicProcessor.register();
 			AllWorldFeatures.registerFeatures();
 		});

src/main/java/com/simibubi/create/CreateClient.java

@@ -107,12 +107,12 @@ public class CreateClient {
 
 		UIRenderHelper.init();
 
-		IResourceManager resourceManager = Minecraft.getInstance()
-			.getResourceManager();
-		if (resourceManager instanceof IReloadableResourceManager)
-			((IReloadableResourceManager) resourceManager).registerReloadListener(new ResourceReloadHandler());
-
 		event.enqueueWork(() -> {
+			IResourceManager resourceManager = Minecraft.getInstance()
+				.getResourceManager();
+			if (resourceManager instanceof IReloadableResourceManager)
+				((IReloadableResourceManager) resourceManager).registerReloadListener(new ResourceReloadHandler());
+
 			registerLayerRenderers(Minecraft.getInstance()
 				.getEntityRenderDispatcher());
 		});

src/main/java/com/simibubi/create/content/curiosities/weapons/PotatoCannonProjectileTypes.java

@@ -253,11 +253,15 @@ public class PotatoCannonProjectileTypes {
 	;
 
 	public static void registerType(ResourceLocation resLoc, PotatoCannonProjectileTypes type) {
-		ALL.put(resLoc, type);
+		synchronized (ALL) {
+			ALL.put(resLoc, type);
+		}
 	}
 
 	public static void assignType(IRegistryDelegate<Item> item, PotatoCannonProjectileTypes type) {
-		ITEM_MAP.put(item, type);
+		synchronized (ITEM_MAP) {
+			ITEM_MAP.put(item, type);
+		}
 	}
 
 	public static Optional<PotatoCannonProjectileTypes> getProjectileTypeOf(ItemStack item) {

src/main/java/com/simibubi/create/foundation/ponder/PonderRegistry.java

@@ -41,23 +41,32 @@ public class PonderRegistry {
 	// Map from item ids to all storyboards
 	public static final Map<ResourceLocation, List<PonderStoryBoardEntry>> ALL = new HashMap<>();
 
-	private static String currentNamespace;
+	private static final ThreadLocal<String> CURRENT_NAMESPACE = new ThreadLocal<>();
+
+	private static String getCurrentNamespace() {
+		return CURRENT_NAMESPACE.get();
+	}
+
+	private static void setCurrentNamespace(String namespace) {
+		CURRENT_NAMESPACE.set(namespace);
+	}
 
 	public static void startRegistration(String namespace) {
-		if (currentNamespace != null) {
+		if (getCurrentNamespace() != null) {
 			throw new IllegalStateException("Cannot start registration when already started!");
 		}
-		currentNamespace = namespace;
+		setCurrentNamespace(namespace);
 	}
 
 	public static void endRegistration() {
-		if (currentNamespace == null) {
+		if (getCurrentNamespace() == null) {
 			throw new IllegalStateException("Cannot end registration when not started!");
 		}
-		currentNamespace = null;
+		setCurrentNamespace(null);
 	}
 
 	private static String getNamespaceOrThrow() {
+		String currentNamespace = getCurrentNamespace();
 		if (currentNamespace == null) {
 			throw new IllegalStateException("Cannot register storyboard without starting registration!");
 		}
@@ -71,8 +80,10 @@ public class PonderRegistry {
 		PonderSceneBuilder builder = new PonderSceneBuilder(entry);
 		if (tags.length > 0)
 			builder.highlightTags(tags);
-		ALL.computeIfAbsent(id, _$ -> new ArrayList<>())
-			.add(entry);
+		synchronized (ALL) {
+			ALL.computeIfAbsent(id, _$ -> new ArrayList<>())
+				.add(entry);
+		}
 		return builder;
 	}
 

src/main/java/com/simibubi/create/foundation/ponder/content/PonderChapterRegistry.java

@@ -22,11 +22,16 @@ public class PonderChapterRegistry {
 	}
 
 	public void addStoriesToChapter(@Nonnull PonderChapter chapter, PonderStoryBoardEntry... entries) {
-		chapters.get(chapter.getId()).getSecond().addAll(Arrays.asList(entries));
+		List<PonderStoryBoardEntry> entryList = chapters.get(chapter.getId()).getSecond();
+		synchronized (entryList) {
+			entryList.addAll(Arrays.asList(entries));
+		}
 	}
 
 	PonderChapter addChapter(@Nonnull PonderChapter chapter) {
-		chapters.put(chapter.getId(), Pair.of(chapter, new ArrayList<>()));
+		synchronized (chapters) {
+			chapters.put(chapter.getId(), Pair.of(chapter, new ArrayList<>()));
+		}
 		return chapter;
 	}
 

src/main/java/com/simibubi/create/foundation/ponder/content/PonderIndex.java

@@ -445,17 +445,17 @@ public class PonderIndex {
 			.add(Blocks.HONEY_BLOCK);
 
 		PonderRegistry.TAGS.forTag(PonderTag.CONTRAPTION_ACTOR)
-				.add(AllBlocks.MECHANICAL_HARVESTER)
-				.add(AllBlocks.MECHANICAL_PLOUGH)
-				.add(AllBlocks.MECHANICAL_DRILL)
-				.add(AllBlocks.MECHANICAL_SAW)
-				.add(AllBlocks.DEPLOYER)
-				.add(AllBlocks.PORTABLE_STORAGE_INTERFACE)
-				.add(AllBlocks.PORTABLE_FLUID_INTERFACE)
-				.add(AllBlocks.MECHANICAL_BEARING)
-				.add(AllBlocks.ANDESITE_FUNNEL)
-				.add(AllBlocks.BRASS_FUNNEL)
-				.add(AllBlocks.SEATS.get(DyeColor.WHITE))
+			.add(AllBlocks.MECHANICAL_HARVESTER)
+			.add(AllBlocks.MECHANICAL_PLOUGH)
+			.add(AllBlocks.MECHANICAL_DRILL)
+			.add(AllBlocks.MECHANICAL_SAW)
+			.add(AllBlocks.DEPLOYER)
+			.add(AllBlocks.PORTABLE_STORAGE_INTERFACE)
+			.add(AllBlocks.PORTABLE_FLUID_INTERFACE)
+			.add(AllBlocks.MECHANICAL_BEARING)
+			.add(AllBlocks.ANDESITE_FUNNEL)
+			.add(AllBlocks.BRASS_FUNNEL)
+			.add(AllBlocks.SEATS.get(DyeColor.WHITE))
 			.add(AllBlocks.REDSTONE_CONTACT)
 			.add(Blocks.BELL)
 			.add(Blocks.DISPENSER)

src/main/java/com/simibubi/create/foundation/ponder/content/PonderTagRegistry.java

@@ -49,11 +49,15 @@ public class PonderTagRegistry {
 	}
 
 	public void add(PonderTag tag, ResourceLocation item) {
-		tags.put(item, tag);
+		synchronized (tags) {
+			tags.put(item, tag);
+		}
 	}
 
 	public void add(PonderTag tag, PonderChapter chapter) {
-		chapterTags.put(chapter, tag);
+		synchronized (chapterTags) {
+			chapterTags.put(chapter, tag);
+		}
 	}
 
 	public ItemBuilder forItems(ResourceLocation... items) {

src/main/java/com/simibubi/create/foundation/render/SuperByteBufferCache.java

@@ -28,7 +28,7 @@ import net.minecraft.util.math.BlockPos;
 
 public class SuperByteBufferCache {
 
-	Map<Compartment<?>, Cache<Object, SuperByteBuffer>> cache;
+	private Map<Compartment<?>, Cache<Object, SuperByteBuffer>> cache;
 
 	public SuperByteBufferCache() {
 		cache = new HashMap<>();
@@ -87,14 +87,18 @@ public class SuperByteBufferCache {
 	}
 
 	public void registerCompartment(Compartment<?> instance) {
-		cache.put(instance, CacheBuilder.newBuilder()
-			.build());
+		synchronized (cache) {
+			cache.put(instance, CacheBuilder.newBuilder()
+				.build());
+		}
 	}
 
 	public void registerCompartment(Compartment<?> instance, long ticksUntilExpired) {
-		cache.put(instance, CacheBuilder.newBuilder()
-			.expireAfterAccess(ticksUntilExpired * 50, TimeUnit.MILLISECONDS)
-			.build());
+		synchronized (cache) {
+			cache.put(instance, CacheBuilder.newBuilder()
+				.expireAfterAccess(ticksUntilExpired * 50, TimeUnit.MILLISECONDS)
+				.build());
+		}
 	}
 
 	private SuperByteBuffer standardBlockRender(BlockState renderedState) {