mm-internal.h

/*
 * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*定义libevent内部使用开辟和释放内存函数
 *如果在编译libevent库时没有加入--disable-malloc-replacement(默认不存在)
 *用户将可以自定义内存分配函数，如果用户设置了将调用标准C函数
 */
 
#ifndef _EVENT_MM_INTERNAL_H
#define _EVENT_MM_INTERNAL_H

#include <sys/types.h>

#ifdef __cplusplus
extern "C" {
#endif

#ifndef _EVENT_DISABLE_MM_REPLACEMENT
void *event_mm_malloc_(size_t sz);
void *event_mm_calloc_(size_t count, size_t size);
char *event_mm_strdup_(const char *s);
void *event_mm_realloc_(void *p, size_t sz);
void event_mm_free_(void *p);
#define mm_malloc(sz) event_mm_malloc_(sz)
#define mm_calloc(count, size) event_mm_calloc_((count), (size))
#define mm_strdup(s) event_mm_strdup_(s)
#define mm_realloc(p, sz) event_mm_realloc_((p), (sz))
#define mm_free(p) event_mm_free_(p)
#else  //直接调用标准C函数
#define mm_malloc(sz) malloc(sz)
#define mm_calloc(n, sz) calloc((n), (sz))
#define mm_strdup(s) strdup(s)
#define mm_realloc(p, sz) realloc((p), (sz))
#define mm_free(p) free(p)
#endif

#ifdef __cplusplus
}
#endif

#endif