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reseau statique a...
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/*
* Copyright (C) 2013 Freie Universitรคt Berlin
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @addtogroup oneway_malloc
* @ingroup sys
* @{
*
* @file
* @brief Simple malloc wrapper for SBRK
* @author Kaspar Schleiser <kaspar@schleiser.de>
*
* @}
*/
#include <string.h>
#include "malloc.h"
#define ENABLE_DEBUG (0)
#include "debug.h"
extern void *sbrk(int incr);
void __attribute__((weak)) *malloc(size_t size)
{
if (size != 0) {
void *ptr = sbrk(size);
DEBUG("malloc(): allocating block of size %u at %p.\n", (unsigned int) size, ptr);
if (ptr != (void*) -1) {
return ptr;
}
}
return NULL;
}
void __attribute__((weak)) *realloc(void *ptr, size_t size)
{
if (ptr == NULL) {
return malloc(size);
}
else if (size == 0) {
free(ptr);
return NULL;
}
else {
void *newptr = malloc(size);
if (newptr) {
memcpy(newptr, ptr, size);
}
return newptr;
}
}
void __attribute__((weak)) *calloc(size_t size, size_t cnt)
{
void *mem = malloc(size * cnt);
if (mem) {
memset(mem, 0, size * cnt);
}
return mem;
}
void __attribute__((weak)) free(void *ptr)
{
/* who cares about pointers? */
(void) ptr;
DEBUG("free(): block at %p lost.\n", ptr);
}
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