com.hazelcast.nio

Class UnsafeHelper

java.lang.Object

com.hazelcast.nio.UnsafeHelper

Deprecated.

Use MemoryAccessor instead due to following reasons:

Deprecated to MemoryAccessor due to following reasons:

• Preventing hard-dependency to Unsafe/
• Some platforms (such as SPARC) don't support unaligned memory access. So on these platforms memory access alignments must be checked and handled if possible.

@Deprecated
@PrivateApi
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

Fields

Modifier and Type	Field and Description
static long	BOOLEAN_ARRAY_BASE_OFFSET Deprecated.
static int	BOOLEAN_ARRAY_INDEX_SCALE Deprecated.
static long	BYTE_ARRAY_BASE_OFFSET Deprecated.
static int	BYTE_ARRAY_INDEX_SCALE Deprecated.
static long	CHAR_ARRAY_BASE_OFFSET Deprecated.
static int	CHAR_ARRAY_INDEX_SCALE Deprecated.
static long	DOUBLE_ARRAY_BASE_OFFSET Deprecated.
static int	DOUBLE_ARRAY_INDEX_SCALE Deprecated.
static long	FLOAT_ARRAY_BASE_OFFSET Deprecated.
static int	FLOAT_ARRAY_INDEX_SCALE Deprecated.
static long	INT_ARRAY_BASE_OFFSET Deprecated.
static int	INT_ARRAY_INDEX_SCALE Deprecated.
static long	LONG_ARRAY_BASE_OFFSET Deprecated.
static int	LONG_ARRAY_INDEX_SCALE Deprecated.
static int	MEM_COPY_THRESHOLD Deprecated.
static long	SHORT_ARRAY_BASE_OFFSET Deprecated.
static int	SHORT_ARRAY_INDEX_SCALE Deprecated.
static sun.misc.Unsafe	UNSAFE Deprecated. GlobalMemoryAccessorRegistry.MEM instead
static boolean	UNSAFE_AVAILABLE Deprecated. GlobalMemoryAccessorRegistry.MEM_AVAILABLE instead

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

UNSAFE

@Deprecated
public static final sun.misc.Unsafe UNSAFE

Deprecated. GlobalMemoryAccessorRegistry.MEM instead

UNSAFE_AVAILABLE

@Deprecated
public static final boolean UNSAFE_AVAILABLE

Deprecated. GlobalMemoryAccessorRegistry.MEM_AVAILABLE instead

BYTE_ARRAY_BASE_OFFSET

public static final long BYTE_ARRAY_BASE_OFFSET

Deprecated.

BOOLEAN_ARRAY_BASE_OFFSET

public static final long BOOLEAN_ARRAY_BASE_OFFSET

Deprecated.

SHORT_ARRAY_BASE_OFFSET

public static final long SHORT_ARRAY_BASE_OFFSET

Deprecated.

CHAR_ARRAY_BASE_OFFSET

public static final long CHAR_ARRAY_BASE_OFFSET

Deprecated.

INT_ARRAY_BASE_OFFSET

public static final long INT_ARRAY_BASE_OFFSET

Deprecated.

FLOAT_ARRAY_BASE_OFFSET

public static final long FLOAT_ARRAY_BASE_OFFSET

Deprecated.

LONG_ARRAY_BASE_OFFSET

public static final long LONG_ARRAY_BASE_OFFSET

Deprecated.

DOUBLE_ARRAY_BASE_OFFSET

public static final long DOUBLE_ARRAY_BASE_OFFSET

Deprecated.

BOOLEAN_ARRAY_INDEX_SCALE

public static final int BOOLEAN_ARRAY_INDEX_SCALE

Deprecated.

BYTE_ARRAY_INDEX_SCALE

public static final int BYTE_ARRAY_INDEX_SCALE

Deprecated.

SHORT_ARRAY_INDEX_SCALE

public static final int SHORT_ARRAY_INDEX_SCALE

Deprecated.

CHAR_ARRAY_INDEX_SCALE

public static final int CHAR_ARRAY_INDEX_SCALE

Deprecated.

INT_ARRAY_INDEX_SCALE

public static final int INT_ARRAY_INDEX_SCALE

Deprecated.

FLOAT_ARRAY_INDEX_SCALE

public static final int FLOAT_ARRAY_INDEX_SCALE

Deprecated.

LONG_ARRAY_INDEX_SCALE

public static final int LONG_ARRAY_INDEX_SCALE

Deprecated.

DOUBLE_ARRAY_INDEX_SCALE

public static final int DOUBLE_ARRAY_INDEX_SCALE

Deprecated.

MEM_COPY_THRESHOLD

public static final int MEM_COPY_THRESHOLD

Deprecated.

See Also:

Constant Field Values