124 lines
4.3 KiB
C
124 lines
4.3 KiB
C
/* EINA - EFL data type library
|
|
* Copyright (C) 2007-2008 Jorge Luis Zapata Muga
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library;
|
|
* if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef EINA_MEMPOOL_H_
|
|
#define EINA_MEMPOOL_H_
|
|
|
|
#include "eina_types.h"
|
|
#include "eina_error.h"
|
|
#include "eina_module.h"
|
|
|
|
|
|
/**
|
|
* @addtogroup Eina_Memory_Pool_Group Memory Pool
|
|
*
|
|
* @brief These functions provide memory pool management.
|
|
*
|
|
* Several mempool are available:
|
|
*
|
|
* @li @c buddy: It uses the
|
|
* <a href="http://en.wikipedia.org/wiki/Buddy_memory_allocation">"buddy
|
|
* allocator" algorithm</a> but the Eina implementation differs in the
|
|
* sense that the chunk information is not stored on the chunk itself,
|
|
* but on another memory area. This is useful for cases where the
|
|
* memory to manage might be slower to access, or limited (like video
|
|
* memory).
|
|
* @li @c chained_pool: It is the default one. It allocates a big
|
|
* chunk of memory with malloc() and split the result in chunks of the
|
|
* requested size that are pushed inside a stack. When requested, it
|
|
* takes this pointer from the stack to give them to whoever wants
|
|
* them.
|
|
* @li @c ememoa_fixed and @c ememoa_unknown: experimental allocators
|
|
* which could be useful when a fixed amount of memory is needed.
|
|
* @li @c fixed_bitmap: It allocates with malloc) 32* the requested
|
|
* size and push the pool pointer in an rbtree. To find empty space in
|
|
* a pool, it will just search for the first bit set in an int (32
|
|
* bits). Then, when a pointer is freed, it will do a search inside
|
|
* the rbtree.
|
|
* @li @c pass_through: it just call malloc() and free(). It may be
|
|
* faster on some computers than using our own allocators (like having
|
|
* a huge L2 cache, over 4MB).
|
|
* @li @c one_big: It call just one time malloc for the requested number
|
|
* of items. Useful when you know in advance how many object of some
|
|
* type will live during the life of the mempool.
|
|
*/
|
|
|
|
/**
|
|
* @addtogroup Eina_Tools_Group Tools
|
|
*
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @defgroup Eina_Memory_Pool_Group Memory Pool
|
|
*
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @typedef Eina_Mempool
|
|
* Mempool type.
|
|
*/
|
|
typedef struct _Eina_Mempool Eina_Mempool;
|
|
|
|
/**
|
|
* @typedef Eina_Mempool_Backend
|
|
* Mempool backend type.
|
|
*/
|
|
typedef struct _Eina_Mempool_Backend Eina_Mempool_Backend;
|
|
|
|
|
|
/**
|
|
* @typedef Eina_Mempool_Repack_Cb
|
|
* Type for a callback who need to unreference an old object from a mempool
|
|
* and reference the new one instead. Memcpy is taken care by the mempool.
|
|
*/
|
|
typedef void (*Eina_Mempool_Repack_Cb)(void *dst, void *src, void *data);
|
|
|
|
EAPI extern Eina_Error EINA_ERROR_NOT_MEMPOOL_MODULE;
|
|
|
|
EAPI Eina_Mempool *eina_mempool_add(const char *module, const char *context, const char *options, ...) EINA_MALLOC EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);
|
|
EAPI void eina_mempool_del(Eina_Mempool *mp) EINA_ARG_NONNULL(1);
|
|
|
|
static inline void *eina_mempool_realloc(Eina_Mempool *mp, void *element, unsigned int size) EINA_ARG_NONNULL(1) EINA_WARN_UNUSED_RESULT;
|
|
static inline void *eina_mempool_malloc(Eina_Mempool *mp, unsigned int size) EINA_MALLOC EINA_ARG_NONNULL(1) EINA_WARN_UNUSED_RESULT;
|
|
static inline void eina_mempool_free(Eina_Mempool *mp, void *element) EINA_ARG_NONNULL(1);
|
|
|
|
EAPI void eina_mempool_repack(Eina_Mempool *mp,
|
|
Eina_Mempool_Repack_Cb cb,
|
|
void *data) EINA_ARG_NONNULL(1, 2);
|
|
EAPI void eina_mempool_gc(Eina_Mempool *mp) EINA_ARG_NONNULL(1);
|
|
EAPI void eina_mempool_statistics(Eina_Mempool *mp) EINA_ARG_NONNULL(1);
|
|
|
|
EAPI Eina_Bool eina_mempool_register(Eina_Mempool_Backend *be) EINA_ARG_NONNULL(1);
|
|
EAPI void eina_mempool_unregister(Eina_Mempool_Backend *be) EINA_ARG_NONNULL(1);
|
|
|
|
EAPI unsigned int eina_mempool_alignof(unsigned int size);
|
|
|
|
#include "eina_inline_mempool.x"
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
#endif /* EINA_MEMPOOL_H_ */
|