201 lines
5.3 KiB
C
201 lines
5.3 KiB
C
/* $Id$ */
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/*
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* Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
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* Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __PJ_POOL_ALT_H__
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#define __PJ_POOL_ALT_H__
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#define __PJ_POOL_H__
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PJ_BEGIN_DECL
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/**
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* The type for function to receive callback from the pool when it is unable
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* to allocate memory. The elegant way to handle this condition is to throw
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* exception, and this is what is expected by most of this library
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* components.
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*/
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typedef void pj_pool_callback(pj_pool_t *pool, pj_size_t size);
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struct pj_pool_mem
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{
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struct pj_pool_mem *next;
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/* data follows immediately */
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};
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struct pj_pool_t
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{
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struct pj_pool_mem *first_mem;
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pj_pool_factory *factory;
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char obj_name[32];
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pj_size_t used_size;
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pj_pool_callback *cb;
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};
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#define PJ_POOL_SIZE (sizeof(struct pj_pool_t))
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/**
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* This constant denotes the exception number that will be thrown by default
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* memory factory policy when memory allocation fails.
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*/
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extern int PJ_NO_MEMORY_EXCEPTION;
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/*
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* Declare all pool API as macro that calls the implementation
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* function.
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*/
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#define pj_pool_create(fc,nm,init,inc,cb) \
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pj_pool_create_imp(__FILE__, __LINE__, fc, nm, init, inc, cb)
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#define pj_pool_release(pool) pj_pool_release_imp(pool)
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#define pj_pool_getobjname(pool) pj_pool_getobjname_imp(pool)
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#define pj_pool_reset(pool) pj_pool_reset_imp(pool)
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#define pj_pool_get_capacity(pool) pj_pool_get_capacity_imp(pool)
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#define pj_pool_get_used_size(pool) pj_pool_get_used_size_imp(pool)
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#define pj_pool_alloc(pool,sz) \
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pj_pool_alloc_imp(__FILE__, __LINE__, pool, sz)
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#define pj_pool_calloc(pool,cnt,elem) \
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pj_pool_calloc_imp(__FILE__, __LINE__, pool, cnt, elem)
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#define pj_pool_zalloc(pool,sz) \
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pj_pool_zalloc_imp(__FILE__, __LINE__, pool, sz)
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/*
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* Declare prototypes for pool implementation API.
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*/
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/* Create pool */
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PJ_DECL(pj_pool_t*) pj_pool_create_imp(const char *file, int line,
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void *factory,
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const char *name,
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pj_size_t initial_size,
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pj_size_t increment_size,
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pj_pool_callback *callback);
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/* Release pool */
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PJ_DECL(void) pj_pool_release_imp(pj_pool_t *pool);
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/* Get pool name */
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PJ_DECL(const char*) pj_pool_getobjname_imp(pj_pool_t *pool);
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/* Reset pool */
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PJ_DECL(void) pj_pool_reset_imp(pj_pool_t *pool);
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/* Get capacity */
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PJ_DECL(pj_size_t) pj_pool_get_capacity_imp(pj_pool_t *pool);
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/* Get total used size */
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PJ_DECL(pj_size_t) pj_pool_get_used_size_imp(pj_pool_t *pool);
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/* Allocate memory from the pool */
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PJ_DECL(void*) pj_pool_alloc_imp(const char *file, int line,
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pj_pool_t *pool, pj_size_t sz);
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/* Allocate memory from the pool and zero the memory */
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PJ_DECL(void*) pj_pool_calloc_imp(const char *file, int line,
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pj_pool_t *pool, unsigned cnt,
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unsigned elemsz);
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/* Allocate memory from the pool and zero the memory */
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PJ_DECL(void*) pj_pool_zalloc_imp(const char *file, int line,
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pj_pool_t *pool, pj_size_t sz);
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#define PJ_POOL_ZALLOC_T(pool,type) \
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((type*)pj_pool_zalloc(pool, sizeof(type)))
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#define PJ_POOL_ALLOC_T(pool,type) \
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((type*)pj_pool_alloc(pool, sizeof(type)))
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#ifndef PJ_POOL_ALIGNMENT
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# define PJ_POOL_ALIGNMENT 4
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#endif
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/**
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* This structure declares pool factory interface.
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*/
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typedef struct pj_pool_factory_policy
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{
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/**
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* Allocate memory block (for use by pool). This function is called
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* by memory pool to allocate memory block.
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*
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* @param factory Pool factory.
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* @param size The size of memory block to allocate.
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*
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* @return Memory block.
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*/
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void* (*block_alloc)(pj_pool_factory *factory, pj_size_t size);
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/**
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* Free memory block.
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*
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* @param factory Pool factory.
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* @param mem Memory block previously allocated by block_alloc().
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* @param size The size of memory block.
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*/
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void (*block_free)(pj_pool_factory *factory, void *mem, pj_size_t size);
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/**
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* Default callback to be called when memory allocation fails.
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*/
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pj_pool_callback *callback;
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/**
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* Option flags.
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*/
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unsigned flags;
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} pj_pool_factory_policy;
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struct pj_pool_factory
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{
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pj_pool_factory_policy policy;
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int dummy;
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};
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struct pj_caching_pool
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{
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pj_pool_factory factory;
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/* just to make it compilable */
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unsigned used_count;
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unsigned used_size;
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unsigned peak_used_size;
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};
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/* just to make it compilable */
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typedef struct pj_pool_block
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{
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int dummy;
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} pj_pool_block;
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#define pj_caching_pool_init( cp, pol, mac)
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#define pj_caching_pool_destroy(cp)
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#define pj_pool_factory_dump(pf, detail)
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PJ_END_DECL
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#endif /* __PJ_POOL_ALT_H__ */
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