tick rate and warp

src/main/java/carpet/mixins/MinecraftServer_coreMixin.java

@@ -19,7 +19,7 @@ import java.net.Proxy;
 import java.util.function.BooleanSupplier;
 
 @Mixin(MinecraftServer.class)
-public abstract class MinecraftServerMixin
+public abstract class MinecraftServer_coreMixin
 {
     @Inject(method = "<init>", at = @At(value = "RETURN"))
     private void onMinecraftServerCTOR(File file_1, Proxy proxy_1, DataFixer dataFixer_1,

src/main/java/carpet/mixins/MinecraftServer_tickspeedMixin.java

@@ -0,0 +1,105 @@
+package carpet.mixins;
+
+import carpet.helpers.TickSpeed;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.util.SystemUtil;
+import net.minecraft.util.profiler.DisableableProfiler;
+import org.apache.logging.log4j.Logger;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.Redirect;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import java.util.function.BooleanSupplier;
+
+@Mixin(MinecraftServer.class)
+public abstract class MinecraftServer_tickspeedMixin
+{
+    @Shadow private volatile boolean running;
+
+    @Shadow private long timeReference;
+
+    @Shadow private long field_4557;
+
+    @Shadow @Final private static Logger LOGGER;
+
+    @Shadow private boolean profilerStartQueued;
+
+    @Shadow @Final private DisableableProfiler profiler;
+
+    @Shadow protected abstract void tick(BooleanSupplier booleanSupplier_1);
+
+    @Shadow protected abstract boolean shouldKeepTicking();
+
+    @Shadow private boolean field_19249;
+
+    @Shadow private long field_19248;
+
+    @Shadow protected abstract void method_16208();
+
+    @Shadow private volatile boolean loading;
+
+    // Cancel a while statement
+    @Redirect(method = "run", at = @At(value = "FIELD", target = "Lnet/minecraft/server/MinecraftServer;running:Z"))
+    private boolean cancelRunLoop(MinecraftServer server)
+    {
+        return false;
+    }
+
+    // Replaced the above cancelled while statement with this one
+    // could possibly just inject that mspt selection at the beginning of the loop, but then adding all mspt's to
+    // replace 50L will be a hassle
+    @Inject(method = "run", at = @At(value = "INVOKE", shift = At.Shift.AFTER,
+            target = "Lnet/minecraft/server/MinecraftServer;setFavicon(Lnet/minecraft/server/ServerMetadata;)V"))
+    private void modifiedRunLoop(CallbackInfo ci)
+    {
+        while (this.running)
+        {
+            //long long_1 = SystemUtil.getMeasuringTimeMs() - this.timeReference;
+            //CM deciding on tick speed
+            long mspt = 0L;
+            long long_1 = 0L;
+            if (TickSpeed.time_warp_start_time != 0 && TickSpeed.continueWarp())
+            {
+                //making sure server won't flop after the warp or if the warp is interrupted
+                this.timeReference = this.field_4557 = SystemUtil.getMeasuringTimeMs();
+            }
+            else
+            {
+                mspt = TickSpeed.mspt; // regular tick
+                long_1 = SystemUtil.getMeasuringTimeMs() - this.timeReference;
+            }
+            //end tick deciding
+            //smoothed out delay to include mcpt component. With 50L gives defaults.
+            if (long_1 > /*2000L*/1000L+20*mspt && this.timeReference - this.field_4557 >= /*15000L*/10000L+100*mspt)
+            {
+                long long_2 = long_1 / mspt;//50L;
+                LOGGER.warn("Can't keep up! Is the server overloaded? Running {}ms or {} ticks behind", long_1, long_2);
+                this.timeReference += long_2 * mspt;//50L;
+                this.field_4557 = this.timeReference;
+            }
+
+            this.timeReference += mspt;//50L;
+            if (this.profilerStartQueued)
+            {
+                this.profilerStartQueued = false;
+                this.profiler.getController().enable();
+            }
+
+            this.profiler.startTick();
+            this.profiler.push("tick");
+            this.tick(this::shouldKeepTicking);
+            this.profiler.swap("nextTickWait");
+            this.field_19249 = true;
+            this.field_19248 = Math.max(SystemUtil.getMeasuringTimeMs() + /*50L*/ mspt, this.timeReference);
+            this.method_16208();
+            this.profiler.pop();
+            this.profiler.endTick();
+            this.loading = true;
+        }
+
+    }
+}

src/main/resources/carpet.mixins.json

@@ -4,7 +4,8 @@
   "compatibilityLevel": "JAVA_8",
   "mixins": [
     "CommandManagerMixin",
-    "MinecraftServerMixin",
+    "MinecraftServer_coreMixin",
+    "MinecraftServer_tickspeedMixin",
     "PlayerListHeaderS2CPacketMixin",
     "WeightedPickerEntryMixin",
     "ExperienceOrbEntityMixin",