nengel@2: /*
nengel@2:  * default memory allocator for libavutil
nengel@2:  * Copyright (c) 2002 Fabrice Bellard
nengel@2:  *
nengel@2:  * This file is part of FFmpeg.
nengel@2:  *
nengel@2:  * FFmpeg is free software; you can redistribute it and/or
nengel@2:  * modify it under the terms of the GNU Lesser General Public
nengel@2:  * License as published by the Free Software Foundation; either
nengel@2:  * version 2.1 of the License, or (at your option) any later version.
nengel@2:  *
nengel@2:  * FFmpeg is distributed in the hope that it will be useful,
nengel@2:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
nengel@2:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
nengel@2:  * Lesser General Public License for more details.
nengel@2:  *
nengel@2:  * You should have received a copy of the GNU Lesser General Public
nengel@2:  * License along with FFmpeg; if not, write to the Free Software
nengel@2:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
nengel@2:  */
nengel@2: 
nengel@2: /**
nengel@2:  * @file
nengel@2:  * default memory allocator for libavutil
nengel@2:  */
nengel@2: 
nengel@2: #include "config.h"
nengel@2: 
nengel@2: #include <limits.h>
nengel@2: #include <stdlib.h>
nengel@2: #include <stdint.h>
nengel@2: #include <string.h>
nengel@2: #if HAVE_MALLOC_H
nengel@2: #include <malloc.h>
nengel@2: #endif
nengel@2: 
nengel@2: #include "mem.h"
nengel@2: 
nengel@2: /* here we can use OS-dependent allocation functions */
nengel@2: #undef free
nengel@2: #undef malloc
nengel@2: #undef realloc
nengel@2: 
nengel@2: #ifdef MALLOC_PREFIX
nengel@2: 
nengel@2: #define malloc         AV_JOIN(MALLOC_PREFIX, malloc)
nengel@2: #define memalign       AV_JOIN(MALLOC_PREFIX, memalign)
nengel@2: #define posix_memalign AV_JOIN(MALLOC_PREFIX, posix_memalign)
nengel@2: #define realloc        AV_JOIN(MALLOC_PREFIX, realloc)
nengel@2: #define free           AV_JOIN(MALLOC_PREFIX, free)
nengel@2: 
nengel@2: void *malloc(size_t size);
nengel@2: void *memalign(size_t align, size_t size);
nengel@2: int   posix_memalign(void **ptr, size_t align, size_t size);
nengel@2: void *realloc(void *ptr, size_t size);
nengel@2: void  free(void *ptr);
nengel@2: 
nengel@2: #endif /* MALLOC_PREFIX */
nengel@2: 
nengel@2: 
nengel@2: /* You can redefine av_malloc and av_free in your project to use your
nengel@2:    memory allocator. You do not need to suppress this file because the
nengel@2:    linker will do it automatically. */
nengel@2: 
nengel@2: void *av_malloc(unsigned int size)
nengel@2: {
nengel@2:     void *ptr = NULL;
nengel@2:     /* let's disallow possible ambiguous cases */
nengel@2:     if(size > (INT_MAX-16) )
nengel@2:         return NULL;
nengel@2: 
nengel@2: //FIXME: when no aligned mallocs vector code should be disabled.
nengel@2: #if HAVE_POSIX_MEMALIGN
nengel@2:     if (posix_memalign(&ptr,16,size))
nengel@2:         ptr = NULL;
nengel@2: #elif HAVE_MEMALIGN
nengel@2:     ptr = memalign(16,size);
nengel@2: #else
nengel@2:     ptr = malloc(size);
nengel@2: #endif
nengel@2:     return ptr;
nengel@2: }
nengel@2: 
nengel@2: void *av_realloc(void *ptr, unsigned int size)
nengel@2: {
nengel@2:     /* let's disallow possible ambiguous cases */
nengel@2:     if(size > (INT_MAX-16) )
nengel@2:         return NULL;
nengel@2: 
nengel@2:     return realloc(ptr, size);
nengel@2: 
nengel@2: }
nengel@2: 
nengel@2: void av_free(void *ptr)
nengel@2: {
nengel@2:     /* XXX: this test should not be needed on most libcs */
nengel@2:     if (ptr)
nengel@2:         free(ptr);
nengel@2: 
nengel@2: }
nengel@2: 
nengel@2: void av_freep(void *arg)
nengel@2: {
nengel@2:     void **ptr= (void**)arg;
nengel@2:     av_free(*ptr);
nengel@2:     *ptr = NULL;
nengel@2: }
nengel@2: 
nengel@2: void *av_mallocz(unsigned int size)
nengel@2: {
nengel@2:     void *ptr = av_malloc(size);
nengel@2:     if (ptr)
nengel@2:         memset(ptr, 0, size);
nengel@2:     return ptr;
nengel@2: }
nengel@2: 
nengel@2: char *av_strdup(const char *s)
nengel@2: {
nengel@2:     char *ptr= NULL;
nengel@2:     if(s){
nengel@2:         int len = strlen(s) + 1;
nengel@2:         ptr = av_malloc(len);
nengel@2:         if (ptr)
nengel@2:             memcpy(ptr, s, len);
nengel@2:     }
nengel@2:     return ptr;
nengel@2: }