Buffer (Apache Tomcat 7.0.104 API Documentation)

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

    Methods
    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

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