java.lang.Object
- org.apache.ignite.internal.util.GridUnsafe

```
public abstract class GridUnsafe
extends Object
```
Wrapper for Unsafe class.

The following statements for memory access operations are true:
- All putXxx(long addr, xxx val), getXxx(long addr), putXxx(byte[] arr, long off, xxx val), getXxx(byte[] arr, long off) and corresponding methods with LE suffix are alignment aware and can be safely used with unaligned pointers.
- All putXxxField(Object obj, long fieldOff, xxx val) and getXxxField(Object obj, long fieldOff) methods are not alignment aware and can't be safely used with unaligned pointers. This methods can be safely used for object field values access because all object fields addresses are aligned.
- All putXxxLE(...) and getXxxLE(...) methods assumes that byte order is fixed as little-endian while native byte order is big-endian. So it is client code responsibility to check native byte order before invoking of this methods.

Field Summary

Fields
Modifier and Type	Field	Description
`static int`	`ADDR_SIZE`	Address size.
`static boolean`	`BIG_ENDIAN`	Big endian.
`static long`	`BOOLEAN_ARR_OFF`
`static int`	`BYTE_ARR_INT_OFF`
`static long`	`BYTE_ARR_OFF`
`static long`	`CHAR_ARR_OFF`
`static long`	`DFLT_MEMORY_PER_BYTE_COPY_THRESHOLD`
`static long`	`DOUBLE_ARR_OFF`
`static long`	`FLOAT_ARR_OFF`
`static long`	`INT_ARR_OFF`
`static long`	`LONG_ARR_OFF`
`static ByteOrder`	`NATIVE_BYTE_ORDER`
`static long`	`SHORT_ARR_OFF`

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static ByteBuffer`	`allocateBuffer(int len)`
`static Object`	`allocateInstance(Class cls)`	Allocates instance of given class.
`static long`	`allocateMemory(long size)`	Allocates memory.
`static int`	`arrayBaseOffset(Class cls)`	Returns the offset of the first element in the storage allocation of a given array class.
`static int`	`arrayIndexScale(Class<?> cls)`	Returns the scale factor for addressing elements in the storage allocation of a given array class.
`static long`	`bufferAddress(ByteBuffer buf)`	Returns address of `Buffer` instance.
`static void`	`cleanDirectBuffer(ByteBuffer buf)`	Cleans direct `java.nio.ByteBuffer`
`static boolean`	`compareAndSwapInt(Object obj, long off, int exp, int upd)`	Integer CAS.
`static boolean`	`compareAndSwapLong(Object obj, long off, long exp, long upd)`	Long CAS.
`static void`	`copyHeapOffheap(Object srcBase, long srcOff, long dstAddr, long len)`	Copy memory from heap to offheap.
`static void`	`copyMemory(long src, long dst, long len)`	Copies memory.
`static void`	`copyMemory(Object srcBase, long srcOff, Object dstBase, long dstOff, long len)`	Sets all bytes in a given block of memory to a copy of another block.
`static void`	`copyOffheapHeap(long srcAddr, Object dstBase, long dstOff, long len)`	Copy memory from offheap to heap.
`static void`	`copyOffheapOffheap(long srcAddr, long dstAddr, long len)`	Copy memory between offheap locations.
`static int`	`decrementAndGetInt(long ptr)`	Atomically increments value stored in an integer pointed by `ptr`.
`static void`	`freeBuffer(ByteBuffer buf)`
`static void`	`freeMemory(long addr)`	Frees memory.
`static boolean`	`getBoolean(byte[] arr, long off)`	Gets boolean value from byte array.
`static boolean`	`getBooleanField(Object obj, long fieldOff)`	Gets boolean value from object field.
`static byte`	`getByte(byte[] arr, long off)`	Gets byte value from byte array.
`static byte`	`getByte(long addr)`	Gets byte value from given address.
`static byte`	`getByteField(Object obj, long fieldOff)`	Gets byte value from object field.
`static byte`	`getByteVolatile(Object obj, long off)`	Gets byte value with volatile semantic.
`static char`	`getChar(byte[] arr, long off)`	Gets char value from byte array.
`static char`	`getChar(long addr)`	Gets char value from given address.
`static char`	`getCharField(Object obj, long fieldOff)`	Gets char value from object field.
`static char`	`getCharLE(byte[] arr, long off)`	Gets char value from byte array assuming that value stored in little-endian byte order and native byte order is big-endian.
`static char`	`getCharLE(long addr)`	Gets char value from given address assuming that value stored in little-endian byte order and native byte order is big-endian.
`static double`	`getDouble(byte[] arr, long off)`	Gets double value from byte array.
`static double`	`getDouble(long addr)`	Gets double value from given address.
`static double`	`getDoubleField(Object obj, long fieldOff)`	Gets double value from object field.
`static double`	`getDoubleLE(byte[] arr, long off)`	Gets double value from byte array assuming that value stored in little-endian byte order and native byte order is big-endian.
`static double`	`getDoubleLE(long addr)`	Gets double value from given address assuming that value stored in little-endian byte order and native byte order is big-endian.
`static float`	`getFloat(byte[] arr, long off)`	Gets float value from byte array.
`static float`	`getFloat(long addr)`	Gets float value from given address.
`static float`	`getFloatField(Object obj, long fieldOff)`	Gets float value from object field.
`static float`	`getFloatLE(byte[] arr, long off)`	Gets float value from byte array assuming that value stored in little-endian byte order and native byte order is big-endian.
`static float`	`getFloatLE(long addr)`	Gets float value from given address assuming that value stored in little-endian byte order and native byte order is big-endian.
`static int`	`getInt(byte[] arr, long off)`	Gets integer value from byte array.
`static int`	`getInt(long addr)`	Gets integer value from given address.
`static int`	`getIntField(Object obj, long fieldOff)`	Gets integer value from object field.
`static int`	`getIntLE(byte[] arr, long off)`	Gets integer value from byte array assuming that value stored in little-endian byte order and native byte order is big-endian.
`static int`	`getIntLE(long addr)`	Gets integer value from given address assuming that value stored in little-endian byte order and native byte order is big-endian.
`static int`	`getIntVolatile(Object obj, long off)`	Gets integer value with volatile semantic.
`static long`	`getLong(byte[] arr, long off)`	Gets long value from byte array.
`static long`	`getLong(long addr)`	Gets long value from given address.
`static long`	`getLongField(Object obj, long fieldOff)`	Gets long value from object field.
`static long`	`getLongLE(byte[] arr, long off)`	Gets long value from byte array assuming that value stored in little-endian byte order and native byte order is big-endian.
`static long`	`getLongLE(long addr)`	Gets long value from given address assuming that value stored in little-endian byte order and native byte order is big-endian.
`static long`	`getLongVolatile(Object obj, long off)`	Gets long value with volatile semantic.
`static Object`	`getObjectField(Object obj, long fieldOff)`	Gets reference from object field.
`static short`	`getShort(byte[] arr, long off)`	Gets short value from byte array.
`static short`	`getShort(long addr)`	Gets short value from given address.
`static short`	`getShortField(Object obj, long fieldOff)`	Gets short value from object field.
`static short`	`getShortLE(byte[] arr, long off)`	Gets short value from byte array assuming that value stored in little-endian byte order and native byte order is big-endian.
`static short`	`getShortLE(long addr)`	Gets short value from given address assuming that value stored in little-endian byte order and native byte order is big-endian.
`static int`	`incrementAndGetInt(long ptr)`	Atomically increments value stored in an integer pointed by `ptr`.
`static Object`	`invoke(Method mtd, Object... args)`	Invokes some method on `sun.misc.Unsafe` instance.
`static long`	`objectFieldOffset(Field field)`	Returns object field offset.
`static int`	`pageSize()`	Returns page size.
`static void`	`putBoolean(byte[] arr, long off, boolean val)`	Stores boolean value into byte array.
`static void`	`putBooleanField(Object obj, long fieldOff, boolean val)`	Stores boolean value into object field.
`static void`	`putByte(byte[] arr, long off, byte val)`	Stores byte value into byte array.
`static void`	`putByte(long addr, byte val)`	Stores given byte value.
`static void`	`putByteField(Object obj, long fieldOff, byte val)`	Stores byte value into object field.
`static void`	`putByteVolatile(Object obj, long off, byte val)`	Stores byte value with volatile semantic.
`static void`	`putChar(byte[] arr, long off, char val)`	Stores char value into byte array.
`static void`	`putChar(long addr, char val)`	Stores given char value.
`static void`	`putCharField(Object obj, long fieldOff, char val)`	Stores char value into object field.
`static void`	`putCharLE(byte[] arr, long off, char val)`	Stores char value into byte array assuming that value should be stored in little-endian byte order and native byte order is big-endian.
`static void`	`putCharLE(long addr, char val)`	Stores given char value assuming that value should be stored in little-endian byte order and native byte order is big-endian.
`static void`	`putDouble(byte[] arr, long off, double val)`	Stores double value into byte array.
`static void`	`putDouble(long addr, double val)`	Stores given double value.
`static void`	`putDoubleField(Object obj, long fieldOff, double val)`	Stores double value into object field.
`static void`	`putDoubleLE(byte[] arr, long off, double val)`	Stores double value into byte array assuming that value should be stored in little-endian byte order and native byte order is big-endian.
`static void`	`putDoubleLE(long addr, double val)`	Stores given double value assuming that value should be stored in little-endian byte order and native byte order is big-endian.
`static void`	`putFloat(byte[] arr, long off, float val)`	Stores float value into byte array.
`static void`	`putFloat(long addr, float val)`	Stores given float value.
`static void`	`putFloatField(Object obj, long fieldOff, float val)`	Stores float value into object field.
`static void`	`putFloatLE(byte[] arr, long off, float val)`	Stores float value into byte array assuming that value should be stored in little-endian byte order and native byte order is big-endian.
`static void`	`putFloatLE(long addr, float val)`	Stores given float value assuming that value should be stored in little-endian byte order and native byte order is big-endian.
`static void`	`putInt(byte[] arr, long off, int val)`	Stores integer value into byte array.
`static void`	`putInt(long addr, int val)`	Stores given integer value.
`static void`	`putIntField(Object obj, long fieldOff, int val)`	Stores integer value into object field.
`static void`	`putIntLE(byte[] arr, long off, int val)`	Stores integer value into byte array assuming that value should be stored in little-endian byte order and native byte order is big-endian.
`static void`	`putIntLE(long addr, int val)`	Stores given integer value assuming that value should be stored in little-endian byte order and native byte order is big-endian.
`static void`	`putIntVolatile(Object obj, long off, int val)`	Stores integer value with volatile semantic.
`static void`	`putLong(byte[] arr, long off, long val)`	Stores long value into byte array.
`static void`	`putLong(long addr, long val)`	Stores given integer value.
`static void`	`putLongField(Object obj, long fieldOff, long val)`	Stores long value into object field.
`static void`	`putLongLE(byte[] arr, long off, long val)`	Stores long value into byte array assuming that value should be stored in little-endian byte order and native byte order is big-endian.
`static void`	`putLongLE(long addr, long val)`	Stores given integer value assuming that value should be stored in little-endian byte order and native byte order is big-endian.
`static void`	`putLongVolatile(Object obj, long off, long val)`	Stores long value with volatile semantic.
`static void`	`putObjectField(Object obj, long fieldOff, Object val)`	Stores reference value into object field.
`static void`	`putObjectVolatile(Object obj, long off, Object val)`	Stores reference value with volatile semantic.
`static void`	`putShort(byte[] arr, long off, short val)`	Stores short value into byte array.
`static void`	`putShort(long addr, short val)`	Stores given short value.
`static void`	`putShortField(Object obj, long fieldOff, short val)`	Stores short value into object field.
`static void`	`putShortLE(byte[] arr, long off, short val)`	Stores short value into byte array assuming that value should be stored in little-endian byte order and native byte order is big-endian.
`static void`	`putShortLE(long addr, short val)`	Stores given short value assuming that value should be stored in little-endian byte order and native byte order is big-endian.
`static ByteBuffer`	`reallocateBuffer(ByteBuffer buf, int len)`
`static long`	`reallocateMemory(long addr, long len)`	Reallocates memory.
`static void`	`setMemory(long addr, long len, byte val)`	Fills memory with given value.
`static Object`	`staticFieldBase(Field field)`	Returns static field base.
`static long`	`staticFieldOffset(Field field)`	Returns static field offset.
`static ByteBuffer`	`wrapPointer(long ptr, int len)`	Wraps pointer to unmanaged memory into direct byte buffer.
`static void`	`zeroMemory(long addr, long len)`	Fills memory with zeroes.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - NATIVE_BYTE_ORDER
```
public static final ByteOrder NATIVE_BYTE_ORDER
```
  - DFLT_MEMORY_PER_BYTE_COPY_THRESHOLD
```
public static final long DFLT_MEMORY_PER_BYTE_COPY_THRESHOLD
```
    See Also:
    
    IgniteSystemProperties.IGNITE_MEMORY_PER_BYTE_COPY_THRESHOLD, Constant Field Values
  - BIG_ENDIAN
```
public static final boolean BIG_ENDIAN
```
    Big endian.
  - ADDR_SIZE
```
public static final int ADDR_SIZE
```
    Address size.
  - BYTE_ARR_OFF
```
public static final long BYTE_ARR_OFF
```
  - BYTE_ARR_INT_OFF
```
public static final int BYTE_ARR_INT_OFF
```
  - SHORT_ARR_OFF
```
public static final long SHORT_ARR_OFF
```
  - INT_ARR_OFF
```
public static final long INT_ARR_OFF
```
  - LONG_ARR_OFF
```
public static final long LONG_ARR_OFF
```
  - FLOAT_ARR_OFF
```
public static final long FLOAT_ARR_OFF
```
  - DOUBLE_ARR_OFF
```
public static final long DOUBLE_ARR_OFF
```
  - CHAR_ARR_OFF
```
public static final long CHAR_ARR_OFF
```
  - BOOLEAN_ARR_OFF
```
public static final long BOOLEAN_ARR_OFF
```
- Method Detail
  - wrapPointer
```
public static ByteBuffer wrapPointer(long ptr,
                                     int len)
```
    Wraps pointer to unmanaged memory into direct byte buffer.
    
    Parameters:
    
    ptr - Pointer to wrap.
    
    len - Memory location length.
    
    Returns:
    
    Byte buffer wrapping the given memory.
  - allocateBuffer
```
public static ByteBuffer allocateBuffer(int len)
```
    Parameters:
    
    len - Length.
    
    Returns:
    
    Allocated direct buffer.
  - freeBuffer
```
public static void freeBuffer(ByteBuffer buf)
```
    Parameters:
    
    buf - Direct buffer allocated by allocateBuffer(int).
  - reallocateBuffer
```
public static ByteBuffer reallocateBuffer(ByteBuffer buf,
                                          int len)
```
    Parameters:
    
    buf - Buffer.
    
    len - New length.
    
    Returns:
    
    Reallocated direct buffer.
  - getBooleanField
```
public static boolean getBooleanField(Object obj,
                                      long fieldOff)
```
    Gets boolean value from object field.
    
    Parameters:
    
    obj - Object.
    
    fieldOff - Field offset.
    
    Returns:
    
    Boolean value from object field.
  - putBooleanField
```
public static void putBooleanField(Object obj,
                                   long fieldOff,
                                   boolean val)
```
    Stores boolean value into object field.
    
    Parameters:
    
    obj - Object.
    
    fieldOff - Field offset.
    
    val - Value.
  - getByteField
```
public static byte getByteField(Object obj,
                                long fieldOff)
```
    Gets byte value from object field.
    
    Parameters:
    
    obj - Object.
    
    fieldOff - Field offset.
    
    Returns:
    
    Byte value from object field.
  - putByteField
```
public static void putByteField(Object obj,
                                long fieldOff,
                                byte val)
```
    Stores byte value into object field.
    
    Parameters:
    
    obj - Object.
    
    fieldOff - Field offset.
    
    val - Value.
  - getShortField
```
public static short getShortField(Object obj,
                                  long fieldOff)
```
    Gets short value from object field.
    
    Parameters:
    
    obj - Object.
    
    fieldOff - Field offset.
    
    Returns:
    
    Short value from object field.
  - putShortField
```
public static void putShortField(Object obj,
                                 long fieldOff,
                                 short val)
```
    Stores short value into object field.
    
    Parameters:
    
    obj - Object.
    
    fieldOff - Field offset.
    
    val - Value.
  - getCharField
```
public static char getCharField(Object obj,
                                long fieldOff)
```
    Gets char value from object field.
    
    Parameters:
    
    obj - Object.
    
    fieldOff - Field offset.
    
    Returns:
    
    Char value from object field.
  - putCharField
```
public static void putCharField(Object obj,
                                long fieldOff,
                                char val)
```
    Stores char value into object field.
    
    Parameters:
    
    obj - Object.
    
    fieldOff - Field offset.
    
    val - Value.
  - getIntField
```
public static int getIntField(Object obj,
                              long fieldOff)
```
    Gets integer value from object field.
    
    Parameters:
    
    obj - Object.
    
    fieldOff - Field offset.
    
    Returns:
    
    Integer value from object field.
  - putIntField
```
public static void putIntField(Object obj,
                               long fieldOff,
                               int val)
```
    Stores integer value into object field.
    
    Parameters:
    
    obj - Object.
    
    fieldOff - Field offset.
    
    val - Value.
  - getLongField
```
public static long getLongField(Object obj,
                                long fieldOff)
```
    Gets long value from object field.
    
    Parameters:
    
    obj - Object.
    
    fieldOff - Field offset.
    
    Returns:
    
    Long value from object field.
  - putLongField
```
public static void putLongField(Object obj,
                                long fieldOff,
                                long val)
```
    Stores long value into object field.
    
    Parameters:
    
    obj - Object.
    
    fieldOff - Field offset.
    
    val - Value.
  - getFloatField
```
public static float getFloatField(Object obj,
                                  long fieldOff)
```
    Gets float value from object field.
    
    Parameters:
    
    obj - Object.
    
    fieldOff - Field offset.
    
    Returns:
    
    Float value from object field.
  - putFloatField
```
public static void putFloatField(Object obj,
                                 long fieldOff,
                                 float val)
```
    Stores float value into object field.
    
    Parameters:
    
    obj - Object.
    
    fieldOff - Field offset.
    
    val - Value.
  - getDoubleField
```
public static double getDoubleField(Object obj,
                                    long fieldOff)
```
    Gets double value from object field.
    
    Parameters:
    
    obj - Object.
    
    fieldOff - Field offset.
    
    Returns:
    
    Double value from object field.
  - putDoubleField
```
public static void putDoubleField(Object obj,
                                  long fieldOff,
                                  double val)
```
    Stores double value into object field.
    
    Parameters:
    
    obj - Object.
    
    fieldOff - Field offset.
    
    val - Value.
  - getObjectField
```
public static Object getObjectField(Object obj,
                                    long fieldOff)
```
    Gets reference from object field.
    
    Parameters:
    
    obj - Object.
    
    fieldOff - Field offset.
    
    Returns:
    
    Reference from object field.
  - putObjectField
```
public static void putObjectField(Object obj,
                                  long fieldOff,
                                  Object val)
```
    Stores reference value into object field.
    
    Parameters:
    
    obj - Object.
    
    fieldOff - Field offset.
    
    val - Value.
  - getBoolean
```
public static boolean getBoolean(byte[] arr,
                                 long off)
```
    Gets boolean value from byte array.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    Returns:
    
    Boolean value from byte array.
  - putBoolean
```
public static void putBoolean(byte[] arr,
                              long off,
                              boolean val)
```
    Stores boolean value into byte array.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    val - Value.
  - getByte
```
public static byte getByte(byte[] arr,
                           long off)
```
    Gets byte value from byte array.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    Returns:
    
    Byte value from byte array.
  - putByte
```
public static void putByte(byte[] arr,
                           long off,
                           byte val)
```
    Stores byte value into byte array.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    val - Value.
  - getShort
```
public static short getShort(byte[] arr,
                             long off)
```
    Gets short value from byte array. Alignment aware.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    Returns:
    
    Short value from byte array.
  - putShort
```
public static void putShort(byte[] arr,
                            long off,
                            short val)
```
    Stores short value into byte array. Alignment aware.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    val - Value.
  - getChar
```
public static char getChar(byte[] arr,
                           long off)
```
    Gets char value from byte array. Alignment aware.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    Returns:
    
    Char value from byte array.
  - putChar
```
public static void putChar(byte[] arr,
                           long off,
                           char val)
```
    Stores char value into byte array. Alignment aware.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    val - Value.
  - getInt
```
public static int getInt(byte[] arr,
                         long off)
```
    Gets integer value from byte array. Alignment aware.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    Returns:
    
    Integer value from byte array.
  - putInt
```
public static void putInt(byte[] arr,
                          long off,
                          int val)
```
    Stores integer value into byte array. Alignment aware.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    val - Value.
  - getLong
```
public static long getLong(byte[] arr,
                           long off)
```
    Gets long value from byte array. Alignment aware.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    Returns:
    
    Long value from byte array.
  - putLong
```
public static void putLong(byte[] arr,
                           long off,
                           long val)
```
    Stores long value into byte array. Alignment aware.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    val - Value.
  - getFloat
```
public static float getFloat(byte[] arr,
                             long off)
```
    Gets float value from byte array. Alignment aware.
    
    Parameters:
    
    arr - Object.
    
    off - Offset.
    
    Returns:
    
    Float value from byte array.
  - putFloat
```
public static void putFloat(byte[] arr,
                            long off,
                            float val)
```
    Stores float value into byte array. Alignment aware.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    val - Value.
  - getDouble
```
public static double getDouble(byte[] arr,
                               long off)
```
    Gets double value from byte array. Alignment aware.
    
    Parameters:
    
    arr - byte array.
    
    off - Offset.
    
    Returns:
    
    Double value from byte array. Alignment aware.
  - putDouble
```
public static void putDouble(byte[] arr,
                             long off,
                             double val)
```
    Stores double value into byte array. Alignment aware.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    val - Value.
  - getShortLE
```
public static short getShortLE(byte[] arr,
                               long off)
```
    Gets short value from byte array assuming that value stored in little-endian byte order and native byte order is big-endian. Alignment aware.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    Returns:
    
    Short value from byte array.
  - putShortLE
```
public static void putShortLE(byte[] arr,
                              long off,
                              short val)
```
    Stores short value into byte array assuming that value should be stored in little-endian byte order and native byte order is big-endian. Alignment aware.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    val - Value.
  - getCharLE
```
public static char getCharLE(byte[] arr,
                             long off)
```
    Gets char value from byte array assuming that value stored in little-endian byte order and native byte order is big-endian. Alignment aware.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    Returns:
    
    Char value from byte array.
  - putCharLE
```
public static void putCharLE(byte[] arr,
                             long off,
                             char val)
```
    Stores char value into byte array assuming that value should be stored in little-endian byte order and native byte order is big-endian. Alignment aware.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    val - Value.
  - getIntLE
```
public static int getIntLE(byte[] arr,
                           long off)
```
    Gets integer value from byte array assuming that value stored in little-endian byte order and native byte order is big-endian. Alignment aware.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    Returns:
    
    Integer value from byte array.
  - putIntLE
```
public static void putIntLE(byte[] arr,
                            long off,
                            int val)
```
    Stores integer value into byte array assuming that value should be stored in little-endian byte order and native byte order is big-endian. Alignment aware.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    val - Value.
  - getLongLE
```
public static long getLongLE(byte[] arr,
                             long off)
```
    Gets long value from byte array assuming that value stored in little-endian byte order and native byte order is big-endian. Alignment aware.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    Returns:
    
    Long value from byte array.
  - putLongLE
```
public static void putLongLE(byte[] arr,
                             long off,
                             long val)
```
    Stores long value into byte array assuming that value should be stored in little-endian byte order and native byte order is big-endian. Alignment aware.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    val - Value.
  - getFloatLE
```
public static float getFloatLE(byte[] arr,
                               long off)
```
    Gets float value from byte array assuming that value stored in little-endian byte order and native byte order is big-endian. Alignment aware.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    Returns:
    
    Float value from byte array.
  - putFloatLE
```
public static void putFloatLE(byte[] arr,
                              long off,
                              float val)
```
    Stores float value into byte array assuming that value should be stored in little-endian byte order and native byte order is big-endian. Alignment aware.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    val - Value.
  - getDoubleLE
```
public static double getDoubleLE(byte[] arr,
                                 long off)
```
    Gets double value from byte array assuming that value stored in little-endian byte order and native byte order is big-endian. Alignment aware.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    Returns:
    
    Double value from byte array.
  - putDoubleLE
```
public static void putDoubleLE(byte[] arr,
                               long off,
                               double val)
```
    Stores double value into byte array assuming that value should be stored in little-endian byte order and native byte order is big-endian. Alignment aware.
    
    Parameters:
    
    arr - Byte array.
    
    off - Offset.
    
    val - Value.
  - getByte
```
public static byte getByte(long addr)
```
    Gets byte value from given address.
    
    Parameters:
    
    addr - Address.
    
    Returns:
    
    Byte value from given address.
  - putByte
```
public static void putByte(long addr,
                           byte val)
```
    Stores given byte value.
    
    Parameters:
    
    addr - Address.
    
    val - Value.
  - getShort
```
public static short getShort(long addr)
```
    Gets short value from given address. Alignment aware.
    
    Parameters:
    
    addr - Address.
    
    Returns:
    
    Short value from given address.
  - putShort
```
public static void putShort(long addr,
                            short val)
```
    Stores given short value. Alignment aware.
    
    Parameters:
    
    addr - Address.
    
    val - Value.
  - getChar
```
public static char getChar(long addr)
```
    Gets char value from given address. Alignment aware.
    
    Parameters:
    
    addr - Address.
    
    Returns:
    
    Char value from given address.
  - putChar
```
public static void putChar(long addr,
                           char val)
```
    Stores given char value. Alignment aware.
    
    Parameters:
    
    addr - Address.
    
    val - Value.
  - getInt
```
public static int getInt(long addr)
```
    Gets integer value from given address. Alignment aware.
    
    Parameters:
    
    addr - Address.
    
    Returns:
    
    Integer value from given address.
  - putInt
```
public static void putInt(long addr,
                          int val)
```
    Stores given integer value. Alignment aware.
    
    Parameters:
    
    addr - Address.
    
    val - Value.
  - getLong
```
public static long getLong(long addr)
```
    Gets long value from given address. Alignment aware.
    
    Parameters:
    
    addr - Address.
    
    Returns:
    
    Long value from given address.
  - putLong
```
public static void putLong(long addr,
                           long val)
```
    Stores given integer value. Alignment aware.
    
    Parameters:
    
    addr - Address.
    
    val - Value.
  - getFloat
```
public static float getFloat(long addr)
```
    Gets float value from given address. Alignment aware.
    
    Parameters:
    
    addr - Address.
    
    Returns:
    
    Float value from given address.
  - putFloat
```
public static void putFloat(long addr,
                            float val)
```
    Stores given float value. Alignment aware.
    
    Parameters:
    
    addr - Address.
    
    val - Value.
  - getDouble
```
public static double getDouble(long addr)
```
    Gets double value from given address. Alignment aware.
    
    Parameters:
    
    addr - Address.
    
    Returns:
    
    Double value from given address.
  - putDouble
```
public static void putDouble(long addr,
                             double val)
```
    Stores given double value. Alignment aware.
    
    Parameters:
    
    addr - Address.
    
    val - Value.
  - getShortLE
```
public static short getShortLE(long addr)
```
    Gets short value from given address assuming that value stored in little-endian byte order and native byte order is big-endian. Alignment aware.
    
    Parameters:
    
    addr - Address.
    
    Returns:
    
    Short value from given address.
  - putShortLE
```
public static void putShortLE(long addr,
                              short val)
```
    Stores given short value assuming that value should be stored in little-endian byte order and native byte order is big-endian. Alignment aware.
    
    Parameters:
    
    addr - Address.
    
    val - Value.
  - getCharLE
```
public static char getCharLE(long addr)
```
    Gets char value from given address assuming that value stored in little-endian byte order and native byte order is big-endian. Alignment aware.
    
    Parameters:
    
    addr - Address.
    
    Returns:
    
    Char value from given address.
  - putCharLE
```
public static void putCharLE(long addr,
                             char val)
```
    Stores given char value assuming that value should be stored in little-endian byte order and native byte order is big-endian. Alignment aware.
    
    Parameters:
    
    addr - Address.
    
    val - Value.
  - getIntLE
```
public static int getIntLE(long addr)
```
    Gets integer value from given address assuming that value stored in little-endian byte order and native byte order is big-endian. Alignment aware.
    
    Parameters:
    
    addr - Address.
    
    Returns:
    
    Integer value from given address.
  - putIntLE
```
public static void putIntLE(long addr,
                            int val)
```
    Stores given integer value assuming that value should be stored in little-endian byte order and native byte order is big-endian. Alignment aware.
    
    Parameters:
    
    addr - Address.
    
    val - Value.
  - getLongLE
```
public static long getLongLE(long addr)
```
    Gets long value from given address assuming that value stored in little-endian byte order and native byte order is big-endian. Alignment aware.
    
    Parameters:
    
    addr - Address.
    
    Returns:
    
    Long value from given address.
  - putLongLE
```
public static void putLongLE(long addr,
                             long val)
```
    Stores given integer value assuming that value should be stored in little-endian byte order and native byte order is big-endian. Alignment aware.
    
    Parameters:
    
    addr - Address.
    
    val - Value.
  - getFloatLE
```
public static float getFloatLE(long addr)
```
    Gets float value from given address assuming that value stored in little-endian byte order and native byte order is big-endian. Alignment aware.
    
    Parameters:
    
    addr - Address.
    
    Returns:
    
    Float value from given address.
  - putFloatLE
```
public static void putFloatLE(long addr,
                              float val)
```
    Stores given float value assuming that value should be stored in little-endian byte order and native byte order is big-endian. Alignment aware.
    
    Parameters:
    
    addr - Address.
    
    val - Value.
  - getDoubleLE
```
public static double getDoubleLE(long addr)
```
    Gets double value from given address assuming that value stored in little-endian byte order and native byte order is big-endian. Alignment aware.
    
    Parameters:
    
    addr - Address.
    
    Returns:
    
    Double value from given address.
  - putDoubleLE
```
public static void putDoubleLE(long addr,
                               double val)
```
    Stores given double value assuming that value should be stored in little-endian byte order and native byte order is big-endian. Alignment aware.
    
    Parameters:
    
    addr - Address.
    
    val - Value.
  - staticFieldOffset
```
public static long staticFieldOffset(Field field)
```
    Returns static field offset.
    
    Parameters:
    
    field - Field.
    
    Returns:
    
    Static field offset.
  - objectFieldOffset
```
public static long objectFieldOffset(Field field)
```
    Returns object field offset.
    
    Parameters:
    
    field - Field.
    
    Returns:
    
    Object field offset.
  - staticFieldBase
```
public static Object staticFieldBase(Field field)
```
    Returns static field base.
    
    Parameters:
    
    field - Field.
    
    Returns:
    
    Static field base.
  - allocateMemory
```
public static long allocateMemory(long size)
```
    Allocates memory.
    
    Parameters:
    
    size - Size.
    
    Returns:
    
    address.
  - reallocateMemory
```
public static long reallocateMemory(long addr,
                                    long len)
```
    Reallocates memory.
    
    Parameters:
    
    addr - Address.
    
    len - Length.
    
    Returns:
    
    address.
  - setMemory
```
public static void setMemory(long addr,
                             long len,
                             byte val)
```
    Fills memory with given value.
    
    Parameters:
    
    addr - Address.
    
    len - Length.
    
    val - Value.
  - zeroMemory
```
public static void zeroMemory(long addr,
                              long len)
```
    Fills memory with zeroes.
    
    Parameters:
    
    addr - Address.
    
    len - Length.
  - copyOffheapOffheap
```
public static void copyOffheapOffheap(long srcAddr,
                                      long dstAddr,
                                      long len)
```
    Copy memory between offheap locations.
    
    Parameters:
    
    srcAddr - Source address.
    
    dstAddr - Destination address.
    
    len - Length.
  - copyOffheapHeap
```
public static void copyOffheapHeap(long srcAddr,
                                   Object dstBase,
                                   long dstOff,
                                   long len)
```
    Copy memory from offheap to heap.
    
    Parameters:
    
    srcAddr - Source address.
    
    dstBase - Destination base.
    
    dstOff - Destination offset.
    
    len - Length.
  - copyHeapOffheap
```
public static void copyHeapOffheap(Object srcBase,
                                   long srcOff,
                                   long dstAddr,
                                   long len)
```
    Copy memory from heap to offheap.
    
    Parameters:
    
    srcBase - Source base.
    
    srcOff - Source offset.
    
    dstAddr - Destination address.
    
    len - Length.
  - copyMemory
```
public static void copyMemory(long src,
                              long dst,
                              long len)
```
    Copies memory.
    
    Parameters:
    
    src - Source.
    
    dst - Dst.
    
    len - Length.
  - copyMemory
```
public static void copyMemory(Object srcBase,
                              long srcOff,
                              Object dstBase,
                              long dstOff,
                              long len)
```
    Sets all bytes in a given block of memory to a copy of another block.
    
    Parameters:
    
    srcBase - Source base.
    
    srcOff - Source offset.
    
    dstBase - Dst base.
    
    dstOff - Dst offset.
    
    len - Length.
  - freeMemory
```
public static void freeMemory(long addr)
```
    Frees memory.
    
    Parameters:
    
    addr - Address.
  - arrayBaseOffset
```
public static int arrayBaseOffset(Class cls)
```
    Returns the offset of the first element in the storage allocation of a given array class.
    
    Parameters:
    
    cls - Class.
    
    Returns:
    
    the offset of the first element in the storage allocation of a given array class.
  - arrayIndexScale
```
public static int arrayIndexScale(Class<?> cls)
```
    Returns the scale factor for addressing elements in the storage allocation of a given array class.
    
    Parameters:
    
    cls - Class.
    
    Returns:
    
    the scale factor for addressing elements in the storage allocation of a given array class.
  - allocateInstance
```
public static Object allocateInstance(Class cls)
                               throws InstantiationException
```
    Allocates instance of given class.
    
    Parameters:
    
    cls - Class.
    
    Returns:
    
    Allocated instance.
    
    Throws:
    
    InstantiationException
  - compareAndSwapInt
```
public static boolean compareAndSwapInt(Object obj,
                                        long off,
                                        int exp,
                                        int upd)
```
    Integer CAS.
    
    Parameters:
    
    obj - Object.
    
    off - Offset.
    
    exp - Expected.
    
    upd - Upd.
    
    Returns:
    
    True if operation completed successfully, false - otherwise.
  - compareAndSwapLong
```
public static boolean compareAndSwapLong(Object obj,
                                         long off,
                                         long exp,
                                         long upd)
```
    Long CAS.
    
    Parameters:
    
    obj - Object.
    
    off - Offset.
    
    exp - Expected.
    
    upd - Upd.
    
    Returns:
    
    True if operation completed successfully, false - otherwise.
  - incrementAndGetInt
```
public static int incrementAndGetInt(long ptr)
```
    Atomically increments value stored in an integer pointed by ptr.
    
    Parameters:
    
    ptr - Pointer to an integer.
    
    Returns:
    
    Updated value.
  - decrementAndGetInt
```
public static int decrementAndGetInt(long ptr)
```
    Atomically increments value stored in an integer pointed by ptr.
    
    Parameters:
    
    ptr - Pointer to an integer.
    
    Returns:
    
    Updated value.
  - getByteVolatile
```
public static byte getByteVolatile(Object obj,
                                   long off)
```
    Gets byte value with volatile semantic.
    
    Parameters:
    
    obj - Object.
    
    off - Offset.
    
    Returns:
    
    Byte value.
  - putByteVolatile
```
public static void putByteVolatile(Object obj,
                                   long off,
                                   byte val)
```
    Stores byte value with volatile semantic.
    
    Parameters:
    
    obj - Object.
    
    off - Offset.
    
    val - Value.
  - getIntVolatile
```
public static int getIntVolatile(Object obj,
                                 long off)
```
    Gets integer value with volatile semantic.
    
    Parameters:
    
    obj - Object.
    
    off - Offset.
    
    Returns:
    
    Integer value.
  - putIntVolatile
```
public static void putIntVolatile(Object obj,
                                  long off,
                                  int val)
```
    Stores integer value with volatile semantic.
    
    Parameters:
    
    obj - Object.
    
    off - Offset.
    
    val - Value.
  - getLongVolatile
```
public static long getLongVolatile(Object obj,
                                   long off)
```
    Gets long value with volatile semantic.
    
    Parameters:
    
    obj - Object.
    
    off - Offset.
    
    Returns:
    
    Long value.
  - putLongVolatile
```
public static void putLongVolatile(Object obj,
                                   long off,
                                   long val)
```
    Stores long value with volatile semantic.
    
    Parameters:
    
    obj - Object.
    
    off - Offset.
    
    val - Value.
  - putObjectVolatile
```
public static void putObjectVolatile(Object obj,
                                     long off,
                                     Object val)
```
    Stores reference value with volatile semantic.
    
    Parameters:
    
    obj - Object.
    
    off - Offset.
    
    val - Value.
  - pageSize
```
public static int pageSize()
```
    Returns page size.
    
    Returns:
    
    Page size.
  - bufferAddress
```
public static long bufferAddress(ByteBuffer buf)
```
    Returns address of Buffer instance.
    
    Parameters:
    
    buf - Buffer.
    
    Returns:
    
    Buffer memory address.
  - invoke
```
public static Object invoke(Method mtd,
                            Object... args)
```
    Invokes some method on sun.misc.Unsafe instance.
    
    Parameters:
    
    mtd - Method.
    
    args - Arguments.
  - cleanDirectBuffer
```
public static void cleanDirectBuffer(ByteBuffer buf)
```
    Cleans direct java.nio.ByteBuffer
    
    Parameters:
    
    buf - Direct buffer.

Class GridUnsafe

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

NATIVE_BYTE_ORDER

DFLT_MEMORY_PER_BYTE_COPY_THRESHOLD

BIG_ENDIAN

ADDR_SIZE

BYTE_ARR_OFF

BYTE_ARR_INT_OFF

SHORT_ARR_OFF

INT_ARR_OFF

LONG_ARR_OFF

FLOAT_ARR_OFF

DOUBLE_ARR_OFF

CHAR_ARR_OFF

BOOLEAN_ARR_OFF

Method Detail

wrapPointer

allocateBuffer

freeBuffer

reallocateBuffer

getBooleanField

putBooleanField

getByteField

putByteField

getShortField

putShortField

getCharField

putCharField

getIntField

putIntField

getLongField

putLongField

getFloatField

putFloatField

getDoubleField

putDoubleField

getObjectField

putObjectField

getBoolean

putBoolean

getByte

putByte

getShort

putShort

getChar

putChar

getInt

putInt

getLong

putLong

getFloat

putFloat

getDouble

putDouble

getShortLE

putShortLE

getCharLE

putCharLE

getIntLE

putIntLE

getLongLE

putLongLE

getFloatLE

putFloatLE

getDoubleLE

putDoubleLE

getByte

putByte

getShort

putShort

getChar

putChar

getInt

putInt

getLong

putLong

getFloat