Class UnsafeWrapper

java.lang.Object

com.aparapi.internal.util.UnsafeWrapper

public class UnsafeWrapper
extends Object

A wrapper around sun.misc.Unsafe for handling atomic operations, copies from fields to arrays and vice versa. We avoid using sun.misc.Unsafe directly using reflection, mostly just to avoid getting 'unsafe' compiler errors. This might need to be changed if we start to see performance issues.

Field Summary

Fields

Modifier and Type	Field	Description
private static Method	arrayBaseOffsetMethod
private static Method	arrayIndexScaleMethod
private static Method	compareAndSwapIntMethod
private static Method	getBooleanMethod
private static Method	getByteMethod
private static Method	getFloatMethod
private static Method	getIntMethod
private static Method	getIntVolatileMethod
private static Method	getLongMethod
private static Method	getObjectMethod
private static int	intArrayBase
private static int	intArrayScale
private static Method	objectFieldOffsetMethod
private static Method	putBooleanMethod
private static Method	putByteMethod
private static Method	putDoubleMethod
private static Method	putFloatMethod
private static Method	putIntMethod
private static Method	putLongMethod
private static Object	unsafe

Constructor Summary

Constructors

Constructor	Description
UnsafeWrapper()

Method Summary

Modifier and Type	Method	Description
static int	arrayBaseOffset(Class<?> _arrayClass)
static int	arrayIndexScale(Class<?> _arrayClass)
static int	atomicAdd(int[] _arr, int _index, int _delta)
static boolean	getBoolean(Object _object, long _offset)
static byte	getByte(Object _object, long _offset)
static float	getFloat(Object _object, long _offset)
static int	getInt(Object _object, long _offset)
static long	getLong(Object _object, long _offset)
static Object	getObject(Object _object, long _offset)
static long	objectFieldOffset(Field _field)
static void	putBoolean(Object _object, long _offset, boolean _boolean)
static void	putByte(Object _object, long _offset, byte _byte)
static void	putDouble(Object _object, long _offset, double _double)
static void	putFloat(Object _object, long _offset, float _float)
static void	putInt(Object _object, long _offset, int _int)
static void	putLong(Object _object, long _offset, long _long)

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

unsafe

private static Object unsafe

getIntVolatileMethod

private static Method getIntVolatileMethod

arrayBaseOffsetMethod

private static Method arrayBaseOffsetMethod

arrayIndexScaleMethod

private static Method arrayIndexScaleMethod

getObjectMethod

private static Method getObjectMethod

getIntMethod

private static Method getIntMethod

getFloatMethod

private static Method getFloatMethod

getByteMethod

private static Method getByteMethod

getBooleanMethod

private static Method getBooleanMethod

getLongMethod

private static Method getLongMethod

objectFieldOffsetMethod

private static Method objectFieldOffsetMethod

putBooleanMethod

private static Method putBooleanMethod

putIntMethod

private static Method putIntMethod

putFloatMethod

private static Method putFloatMethod

putDoubleMethod

private static Method putDoubleMethod

putByteMethod

private static Method putByteMethod

putLongMethod

private static Method putLongMethod

compareAndSwapIntMethod

private static Method compareAndSwapIntMethod

intArrayBase

private static int intArrayBase

intArrayScale

private static int intArrayScale

Constructor Details

UnsafeWrapper

public UnsafeWrapper()

Method Details

atomicAdd

public static int atomicAdd(int[] _arr,
 int _index,
 int _delta)

arrayBaseOffset

public static int arrayBaseOffset(Class<?> _arrayClass)

arrayIndexScale

public static int arrayIndexScale(Class<?> _arrayClass)

getObject

public static Object getObject(Object _object,
 long _offset)

getInt

public static int getInt(Object _object,
 long _offset)

getFloat

public static float getFloat(Object _object,
 long _offset)

getByte

public static byte getByte(Object _object,
 long _offset)

getBoolean

public static boolean getBoolean(Object _object,
 long _offset)

getLong

public static long getLong(Object _object,
 long _offset)

putBoolean

public static void putBoolean(Object _object,
 long _offset,
 boolean _boolean)

putFloat

public static void putFloat(Object _object,
 long _offset,
 float _float)

putInt

public static void putInt(Object _object,
 long _offset,
 int _int)

putDouble

public static void putDouble(Object _object,
 long _offset,
 double _double)

putByte

public static void putByte(Object _object,
 long _offset,
 byte _byte)

putLong

public static void putLong(Object _object,
 long _offset,
 long _long)

objectFieldOffset

public static long objectFieldOffset(Field _field)