com.hazelcast.nio
Class UnsafeHelper

java.lang.Object
  com.hazelcast.nio.UnsafeHelper

public final class UnsafeHelper
extends Object

Unsafe accessor.

Warning: Although both array base-offsets and array index-scales are constant over time currently, a later JVM implementation can change this behaviour to allow varying index-scales and base-offsets over time or per array instances (e.g. compressed primitive arrays or backwards growing arrays...)

See Gil Tene's comment related to Unsafe usage; https://groups.google.com/d/msg/mechanical-sympathy/X-GtLuG0ETo/LMV1d_2IybQJ

Field Summary

static long	BYTE_ARRAY_BASE_OFFSET
static int	BYTE_ARRAY_INDEX_SCALE
static long	CHAR_ARRAY_BASE_OFFSET
static int	CHAR_ARRAY_INDEX_SCALE
static long	DOUBLE_ARRAY_BASE_OFFSET
static int	DOUBLE_ARRAY_INDEX_SCALE
static long	FLOAT_ARRAY_BASE_OFFSET
static int	FLOAT_ARRAY_INDEX_SCALE
static long	INT_ARRAY_BASE_OFFSET
static int	INT_ARRAY_INDEX_SCALE
static long	LONG_ARRAY_BASE_OFFSET
static int	LONG_ARRAY_INDEX_SCALE
static int	MEM_COPY_THRESHOLD
static long	SHORT_ARRAY_BASE_OFFSET
static int	SHORT_ARRAY_INDEX_SCALE
static sun.misc.Unsafe	UNSAFE
static boolean	UNSAFE_AVAILABLE

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

UNSAFE

public static final sun.misc.Unsafe UNSAFE

UNSAFE_AVAILABLE

public static final boolean UNSAFE_AVAILABLE

BYTE_ARRAY_BASE_OFFSET

public static final long BYTE_ARRAY_BASE_OFFSET

SHORT_ARRAY_BASE_OFFSET

public static final long SHORT_ARRAY_BASE_OFFSET

CHAR_ARRAY_BASE_OFFSET

public static final long CHAR_ARRAY_BASE_OFFSET

INT_ARRAY_BASE_OFFSET

public static final long INT_ARRAY_BASE_OFFSET

FLOAT_ARRAY_BASE_OFFSET

public static final long FLOAT_ARRAY_BASE_OFFSET

LONG_ARRAY_BASE_OFFSET

public static final long LONG_ARRAY_BASE_OFFSET

DOUBLE_ARRAY_BASE_OFFSET

public static final long DOUBLE_ARRAY_BASE_OFFSET

BYTE_ARRAY_INDEX_SCALE

public static final int BYTE_ARRAY_INDEX_SCALE

SHORT_ARRAY_INDEX_SCALE

public static final int SHORT_ARRAY_INDEX_SCALE

CHAR_ARRAY_INDEX_SCALE

public static final int CHAR_ARRAY_INDEX_SCALE

INT_ARRAY_INDEX_SCALE

public static final int INT_ARRAY_INDEX_SCALE

FLOAT_ARRAY_INDEX_SCALE

public static final int FLOAT_ARRAY_INDEX_SCALE

LONG_ARRAY_INDEX_SCALE

public static final int LONG_ARRAY_INDEX_SCALE

DOUBLE_ARRAY_INDEX_SCALE

public static final int DOUBLE_ARRAY_INDEX_SCALE

MEM_COPY_THRESHOLD

public static final int MEM_COPY_THRESHOLD

See Also:

Constant Field Values