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Diffstat (limited to 'pjlib/include/pj/pool_alt.h')
| -rw-r--r-- | pjlib/include/pj/pool_alt.h | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/pjlib/include/pj/pool_alt.h b/pjlib/include/pj/pool_alt.h new file mode 100644 index 0000000..713e825 --- /dev/null +++ b/pjlib/include/pj/pool_alt.h @@ -0,0 +1,198 @@ +/* $Id: pool_alt.h 3553 2011-05-05 06:14:19Z nanang $ */ +/* + * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) + * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#ifndef __PJ_POOL_ALT_H__ +#define __PJ_POOL_ALT_H__ + +#define __PJ_POOL_H__ + + +/** + * The type for function to receive callback from the pool when it is unable + * to allocate memory. The elegant way to handle this condition is to throw + * exception, and this is what is expected by most of this library + * components. + */ +typedef void pj_pool_callback(pj_pool_t *pool, pj_size_t size); + +struct pj_pool_mem +{ + struct pj_pool_mem *next; + + /* data follows immediately */ +}; + + +struct pj_pool_t +{ + struct pj_pool_mem *first_mem; + pj_pool_factory *factory; + char obj_name[32]; + pj_size_t used_size; + pj_pool_callback *cb; +}; + + +#define PJ_POOL_SIZE (sizeof(struct pj_pool_t)) + +/** + * This constant denotes the exception number that will be thrown by default + * memory factory policy when memory allocation fails. + */ +extern int PJ_NO_MEMORY_EXCEPTION; + + + +/* + * Declare all pool API as macro that calls the implementation + * function. + */ +#define pj_pool_create(fc,nm,init,inc,cb) \ + pj_pool_create_imp(__FILE__, __LINE__, fc, nm, init, inc, cb) + +#define pj_pool_release(pool) pj_pool_release_imp(pool) +#define pj_pool_getobjname(pool) pj_pool_getobjname_imp(pool) +#define pj_pool_reset(pool) pj_pool_reset_imp(pool) +#define pj_pool_get_capacity(pool) pj_pool_get_capacity_imp(pool) +#define pj_pool_get_used_size(pool) pj_pool_get_used_size_imp(pool) +#define pj_pool_alloc(pool,sz) \ + pj_pool_alloc_imp(__FILE__, __LINE__, pool, sz) + +#define pj_pool_calloc(pool,cnt,elem) \ + pj_pool_calloc_imp(__FILE__, __LINE__, pool, cnt, elem) + +#define pj_pool_zalloc(pool,sz) \ + pj_pool_zalloc_imp(__FILE__, __LINE__, pool, sz) + + + +/* + * Declare prototypes for pool implementation API. + */ + +/* Create pool */ +PJ_DECL(pj_pool_t*) pj_pool_create_imp(const char *file, int line, + void *factory, + const char *name, + pj_size_t initial_size, + pj_size_t increment_size, + pj_pool_callback *callback); + +/* Release pool */ +PJ_DECL(void) pj_pool_release_imp(pj_pool_t *pool); + +/* Get pool name */ +PJ_DECL(const char*) pj_pool_getobjname_imp(pj_pool_t *pool); + +/* Reset pool */ +PJ_DECL(void) pj_pool_reset_imp(pj_pool_t *pool); + +/* Get capacity */ +PJ_DECL(pj_size_t) pj_pool_get_capacity_imp(pj_pool_t *pool); + +/* Get total used size */ +PJ_DECL(pj_size_t) pj_pool_get_used_size_imp(pj_pool_t *pool); + +/* Allocate memory from the pool */ +PJ_DECL(void*) pj_pool_alloc_imp(const char *file, int line, + pj_pool_t *pool, pj_size_t sz); + +/* Allocate memory from the pool and zero the memory */ +PJ_DECL(void*) pj_pool_calloc_imp(const char *file, int line, + pj_pool_t *pool, unsigned cnt, + unsigned elemsz); + +/* Allocate memory from the pool and zero the memory */ +PJ_DECL(void*) pj_pool_zalloc_imp(const char *file, int line, + pj_pool_t *pool, pj_size_t sz); + + +#define PJ_POOL_ZALLOC_T(pool,type) \ + ((type*)pj_pool_zalloc(pool, sizeof(type))) +#define PJ_POOL_ALLOC_T(pool,type) \ + ((type*)pj_pool_alloc(pool, sizeof(type))) +#ifndef PJ_POOL_ALIGNMENT +# define PJ_POOL_ALIGNMENT 4 +#endif + +/** + * This structure declares pool factory interface. + */ +typedef struct pj_pool_factory_policy +{ + /** + * Allocate memory block (for use by pool). This function is called + * by memory pool to allocate memory block. + * + * @param factory Pool factory. + * @param size The size of memory block to allocate. + * + * @return Memory block. + */ + void* (*block_alloc)(pj_pool_factory *factory, pj_size_t size); + + /** + * Free memory block. + * + * @param factory Pool factory. + * @param mem Memory block previously allocated by block_alloc(). + * @param size The size of memory block. + */ + void (*block_free)(pj_pool_factory *factory, void *mem, pj_size_t size); + + /** + * Default callback to be called when memory allocation fails. + */ + pj_pool_callback *callback; + + /** + * Option flags. + */ + unsigned flags; + +} pj_pool_factory_policy; + +struct pj_pool_factory +{ + pj_pool_factory_policy policy; + int dummy; +}; + +struct pj_caching_pool +{ + pj_pool_factory factory; + + /* just to make it compilable */ + unsigned used_count; + unsigned used_size; + unsigned peak_used_size; +}; + +/* just to make it compilable */ +typedef struct pj_pool_block +{ + int dummy; +} pj_pool_block; + +#define pj_caching_pool_init( cp, pol, mac) +#define pj_caching_pool_destroy(cp) +#define pj_pool_factory_dump(pf, detail) + +#endif /* __PJ_POOL_ALT_H__ */ + |