org.apache.tomcat.jni

Class Buffer

java.lang.Object

org.apache.tomcat.jni.Buffer

public class Buffer
extends Object

Buffer

Author:

Mladen Turk

Constructor Summary

Constructors

Constructor and Description
Buffer()

Method Summary

Modifier and Type	Method and Description
static long	address(ByteBuffer buf) Returns the memory address of the ByteBuffer.
static ByteBuffer	calloc(int num, int size) Allocate a new ByteBuffer from memory and set all of the memory to 0
static ByteBuffer	create(long mem, int size) Allocate a new ByteBuffer from already allocated memory.
static void	free(ByteBuffer buf) Deallocates or frees a memory block used by ByteBuffer Warning : Call this method only on ByteBuffers that were created by calling Buffer.alloc or Buffer.calloc.
static ByteBuffer	malloc(int size) Allocate a new ByteBuffer from memory
static ByteBuffer	palloc(long p, int size) Allocate a new ByteBuffer from a pool
static ByteBuffer	pcalloc(long p, int size) Allocate a new ByteBuffer from a pool and set all of the memory to 0
static long	size(ByteBuffer buf) Returns the allocated memory size of the ByteBuffer.

Methods inherited from class java.lang.Object

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

Constructor Detail

Buffer

public Buffer()

Method Detail

malloc

public static ByteBuffer malloc(int size)

Allocate a new ByteBuffer from memory

Parameters:

size - The amount of memory to allocate

Returns:

The ByteBuffer with allocated memory

calloc

public static ByteBuffer calloc(int num,
                                int size)

Allocate a new ByteBuffer from memory and set all of the memory to 0

Parameters:

num - Number of elements.

size - Length in bytes of each element.

Returns:

The ByteBuffer with allocated memory

palloc

public static ByteBuffer palloc(long p,
                                int size)

Allocate a new ByteBuffer from a pool

Parameters:

p - The pool to allocate from

size - The amount of memory to allocate

Returns:

The ByteBuffer with allocated memory

pcalloc

public static ByteBuffer pcalloc(long p,
                                 int size)

Allocate a new ByteBuffer from a pool and set all of the memory to 0

Parameters:

p - The pool to allocate from

size - The amount of memory to allocate

Returns:

The ByteBuffer with allocated memory

create

public static ByteBuffer create(long mem,
                                int size)

Allocate a new ByteBuffer from already allocated memory.
Allocated memory must be provided from call to the Stdlib.alloc or Stdlib.calloc methods.

Parameters:

mem - The memory to use

size - The amount of memory to use

Returns:

The ByteBuffer with attached memory

free

public static void free(ByteBuffer buf)

Deallocates or frees a memory block used by ByteBuffer
Warning : Call this method only on ByteBuffers that were created by calling Buffer.alloc or Buffer.calloc.

Parameters:

buf - Previously allocated ByteBuffer to be freed.

address

public static long address(ByteBuffer buf)

Returns the memory address of the ByteBuffer.

Parameters:

buf - Previously allocated ByteBuffer.

Returns:

the memory address

size

public static long size(ByteBuffer buf)

Returns the allocated memory size of the ByteBuffer.

Parameters:

buf - Previously allocated ByteBuffer.

Returns:

the size