org.apache.ignite.internal.processors.cache.persistence.file

Class AlignedBuffers

java.lang.Object

org.apache.ignite.internal.processors.cache.persistence.file.AlignedBuffers

public class AlignedBuffers
extends Object

Utility class for work with aligned buffers.

Constructor Summary

Constructors

Constructor and Description
AlignedBuffers()

Method Summary

Modifier and Type	Method and Description
static ByteBuffer	allocate(int fsBlockSize, int size) Allocates align memory for use with O_DIRECT and returns native byte buffer.
static void	free(ByteBuffer buf) Frees the memory space used by direct buffer, which must have been returned by a previous call allocate(int, int).
static void	free(long addr) Frees the memory space pointed to by addr - address of buffer, which must have been returned by a previous call allocate(int, int).

Methods inherited from class java.lang.Object

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

Constructor Detail

AlignedBuffers

public AlignedBuffers()

Method Detail

allocate

public static ByteBuffer allocate(int fsBlockSize,
                                  int size)

Allocates align memory for use with O_DIRECT and returns native byte buffer.

Parameters:

fsBlockSize - alignment, FS ans OS block size.

size - capacity.

Returns:

byte buffer, to be released by free(ByteBuffer).

free

public static void free(ByteBuffer buf)

Frees the memory space used by direct buffer, which must have been returned by a previous call allocate(int, int).

Parameters:

buf - direct buffer to free.

free

public static void free(long addr)

Frees the memory space pointed to by addr - address of buffer, which must have been returned by a previous call allocate(int, int).

Parameters:

addr - direct buffer address to free.