org.agrona

Class UnsafeAccess

java.lang.Object

org.agrona.UnsafeAccess

public final class UnsafeAccess
extends Object

Obtain access the the Unsafe class for direct memory operations.

Field Summary

Fields

Modifier and Type	Field and Description
static int	ARRAY_BYTE_BASE_OFFSET Byte array base offset.
static boolean	MEMSET_HACK_REQUIRED Indicates that a special sequence of instructions must be used instead of simply calling Unsafe.setMemory(Object, long, long, byte) in order to trick the JIT into calling the memset function.
static int	MEMSET_HACK_THRESHOLD A minimal size in bytes for the Unsafe.setMemory(Object, long, long, byte) after which JIT could decide to use the memset.
static sun.misc.Unsafe	UNSAFE Reference to the Unsafe instance.

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

Reference to the Unsafe instance.

ARRAY_BYTE_BASE_OFFSET

public static final int ARRAY_BYTE_BASE_OFFSET

Byte array base offset.

MEMSET_HACK_REQUIRED

public static final boolean MEMSET_HACK_REQUIRED

Indicates that a special sequence of instructions must be used instead of simply calling Unsafe.setMemory(Object, long, long, byte) in order to trick the JIT into calling the memset function.

MEMSET_HACK_THRESHOLD

public static final int MEMSET_HACK_THRESHOLD

A minimal size in bytes for the Unsafe.setMemory(Object, long, long, byte) after which JIT could decide to use the memset.

See Also:

MEMSET_HACK_REQUIRED