package sun.misc;

import java.lang.reflect.Field;

public final class Unsafe {
  private void Unsafe() { }

  private static final Unsafe theUnsafe = new Unsafe();

  public static Unsafe getUnsafe() {
    return theUnsafe;
  }

  public native long allocateMemory(long bytes);

  public native void setMemory
    (Object base, long offset, long count, byte value);

  public native void freeMemory(long address);

  public native byte getByte(long address);

  public native void putByte(long address, byte x);

  public native short getShort(long address);

  public native void putShort(long address, short x);

  public native char getChar(long address);

  public native void putChar(long address, char x);

  public native int getInt(long address);

  public native void putInt(long address, int x);

  public native long getLong(long address);

  public native void putLong(long address, long x);

  public native float getFloat(long address);

  public native void putFloat(long address, float x);

  public native double getDouble(long address);

  public native void putDouble(long address, double x);

  public native int getIntVolatile(Object o, long offset);

  public native void putIntVolatile(Object o, long offset, int x);

  public native long getLongVolatile(Object o, long offset);

  public native long putLongVolatile(Object o, long offset, long x);

  public native long putOrderedLong(Object o, long offset, long x);

  public native void putOrderedInt(Object o, long offset, int x);

  public native Object getObject(Object o, long offset);

  public native void putObject(Object o, long offset, Object x);

  public native void putObjectVolatile(Object o, long offset, Object x);

  public native void putOrderedObject(Object o, long offset, Object x);

  public native Object getObjectVolatile(Object o, long offset);

  public native long getAddress(long address);

  public native void putAddress(long address, long x);

  public native int arrayBaseOffset(Class arrayClass);

  public native int arrayIndexScale(Class arrayClass);

  public native long objectFieldOffset(Field field);

  public native void park(boolean absolute, long time);

  public native void unpark(Object target);

  public native void copyMemory(Object srcBase, long srcOffset,
                                Object destBase, long destOffset,
                                long count);

  public native boolean compareAndSwapInt(Object o, long offset, int old,
                                          int new_);

  public native boolean compareAndSwapLong(Object o, long offset,
                                                 long old, long new_);

  public native boolean compareAndSwapObject(Object o, long offset, Object old,
                                             Object new_);

  public void copyMemory(long src, long dst, long count) {
    copyMemory(null, src, null, dst, count);
  }

  public native void throwException(Throwable t);
}