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/* zmalloc - total amount of allocated memory aware version of malloc()
*
* Copyright (c) 2006-2009, Salvatore Sanfilippo <antirez at gmail dot com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Redis nor the names of its contributors may be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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.
*/
#include <stdlib.h>
#include <string.h>
static size_t used_memory = 0;
void *zmalloc(size_t size) {
void *ptr = malloc(size+sizeof(size_t));
*((size_t*)ptr) = size;
used_memory += size+sizeof(size_t);
return (char*)ptr+sizeof(size_t);
}
void *zrealloc(void *ptr, size_t size) {
void *realptr;
size_t oldsize;
void *newptr;
if (ptr == NULL) return zmalloc(size);
realptr = (char*)ptr-sizeof(size_t);
oldsize = *((size_t*)realptr);
newptr = realloc(realptr,size+sizeof(size_t));
if (!newptr) return NULL;
*((size_t*)newptr) = size;
used_memory -= oldsize;
used_memory += size;
return (char*)newptr+sizeof(size_t);
}
void zfree(void *ptr) {
void *realptr;
size_t oldsize;
if (ptr == NULL) return;
realptr = (char*)ptr-sizeof(size_t);
oldsize = *((size_t*)realptr);
used_memory -= oldsize+sizeof(size_t);
free(realptr);
}
char *zstrdup(const char *s) {
size_t l = strlen(s)+1;
char *p = zmalloc(l);
memcpy(p,s,l);
return p;
}
size_t zmalloc_used_memory(void) {
return used_memory;
}
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