Line-Following-Robot/Input/Externals/raspicam-master/dependencies/vcos/vcos_mempool.h

/*
Copyright (c) 2012, Broadcom Europe Ltd
All rights reserved.

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      names of its contributors may be used to endorse or promote products
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*/

/*=============================================================================
VideoCore OS Abstraction Layer - memory pool support
=============================================================================*/

#ifndef VCOS_MEMPOOL_H
#define VCOS_MEMPOOL_H

#ifdef __cplusplus
extern "C" {
#endif

#include "vcos_types.h"
#include "pthreads/vcos_platform.h"

/** \file
  *
  * Memory pools - variable sized allocator.
  *
  * A very basic memory pool API.
  *
  * This interface is deliberately not thread safe - clients should add
  * their own locking, if required.
  *
  *
  * \fixme: Add fixed-size allocator.
  *
  */


/** Initialize a memory pool. The control data is taken from the memory
  * supplied itself.
  *
  * Note: the dmalloc pool uses the memory supplied for its control
  * area. This is probably a bit broken, as it stops you creating
  * a pool in some "special" area of memory, while leaving the control
  * information in normal memory.
  *
  * @param pool  Pointer to pool object.
  *
  * @param name  Name for the pool. Used for diagnostics.
  *
  * @param start Starting address. Must be at least 8byte aligned.
  *
  * @param size  Size of pool in bytes.
  *
  * @return VCOS_SUCCESS if pool was created.
  */
VCOS_INLINE_DECL
VCOS_STATUS_T vcos_mempool_create(VCOS_MEMPOOL_T *pool, const char *name, void *start, VCOS_UNSIGNED size);

/** Allocate some memory from a pool. If no memory is available, it
  * returns NULL.
  *
  * @param pool Pool to allocate from
  * @param len  Length of memory to allocate
  *
  */
VCOS_INLINE_DECL
void *vcos_mempool_alloc(VCOS_MEMPOOL_T *pool, VCOS_UNSIGNED len);

/** Free some memory back to a pool.
  *
  * @param pool Pool to return to
  * @param mem Memory to return
  */
VCOS_INLINE_DECL
void vcos_mempool_free(VCOS_MEMPOOL_T *pool, void *mem);

/** Deinitialize a memory pool.
  *
  * @param pool Pool to return to
  */
VCOS_INLINE_DECL
void vcos_mempool_delete(VCOS_MEMPOOL_T *pool);

#ifdef __cplusplus
}
#endif
#endif