v0

src/com/hypixel/fastutil/util/TLRUtil.java

@@ -0,0 +1,55 @@
+package com.hypixel.fastutil.util;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+import java.util.concurrent.ThreadLocalRandom;
+import sun.misc.Unsafe;
+
+public class TLRUtil {
+   private static final Unsafe UNSAFE;
+   private static final long PROBE;
+
+   public TLRUtil() {
+   }
+
+   public static void localInit() {
+      ThreadLocalRandom.current();
+   }
+
+   public static int getProbe() {
+      return UNSAFE.getInt(Thread.currentThread(), PROBE);
+   }
+
+   public static int advanceProbe(int probe) {
+      probe ^= probe << 13;
+      probe ^= probe >>> 17;
+      probe ^= probe << 5;
+      UNSAFE.putInt(Thread.currentThread(), PROBE, probe);
+      return probe;
+   }
+
+   static {
+      Unsafe instance;
+      try {
+         Field field = Unsafe.class.getDeclaredField("theUnsafe");
+         field.setAccessible(true);
+         instance = (Unsafe)field.get(null);
+      } catch (Exception var5) {
+         try {
+            Constructor<Unsafe> c = Unsafe.class.getDeclaredConstructor();
+            c.setAccessible(true);
+            instance = c.newInstance();
+         } catch (Exception var4) {
+            throw SneakyThrow.sneakyThrow(var4);
+         }
+      }
+
+      UNSAFE = instance;
+
+      try {
+         PROBE = UNSAFE.objectFieldOffset(Thread.class.getDeclaredField("threadLocalRandomProbe"));
+      } catch (NoSuchFieldException var3) {
+         throw SneakyThrow.sneakyThrow(var3);
+      }
+   }
+}