1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/libavutil/mem.c	Tue Sep 25 15:55:33 2012 +0200
     1.3 @@ -0,0 +1,127 @@
     1.4 +/*
     1.5 + * default memory allocator for libavutil
     1.6 + * Copyright (c) 2002 Fabrice Bellard
     1.7 + *
     1.8 + * This file is part of FFmpeg.
     1.9 + *
    1.10 + * FFmpeg is free software; you can redistribute it and/or
    1.11 + * modify it under the terms of the GNU Lesser General Public
    1.12 + * License as published by the Free Software Foundation; either
    1.13 + * version 2.1 of the License, or (at your option) any later version.
    1.14 + *
    1.15 + * FFmpeg is distributed in the hope that it will be useful,
    1.16 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.17 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    1.18 + * Lesser General Public License for more details.
    1.19 + *
    1.20 + * You should have received a copy of the GNU Lesser General Public
    1.21 + * License along with FFmpeg; if not, write to the Free Software
    1.22 + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
    1.23 + */
    1.24 +
    1.25 +/**
    1.26 + * @file
    1.27 + * default memory allocator for libavutil
    1.28 + */
    1.29 +
    1.30 +#include "config.h"
    1.31 +
    1.32 +#include <limits.h>
    1.33 +#include <stdlib.h>
    1.34 +#include <stdint.h>
    1.35 +#include <string.h>
    1.36 +#if HAVE_MALLOC_H
    1.37 +#include <malloc.h>
    1.38 +#endif
    1.39 +
    1.40 +#include "mem.h"
    1.41 +
    1.42 +/* here we can use OS-dependent allocation functions */
    1.43 +#undef free
    1.44 +#undef malloc
    1.45 +#undef realloc
    1.46 +
    1.47 +#ifdef MALLOC_PREFIX
    1.48 +
    1.49 +#define malloc         AV_JOIN(MALLOC_PREFIX, malloc)
    1.50 +#define memalign       AV_JOIN(MALLOC_PREFIX, memalign)
    1.51 +#define posix_memalign AV_JOIN(MALLOC_PREFIX, posix_memalign)
    1.52 +#define realloc        AV_JOIN(MALLOC_PREFIX, realloc)
    1.53 +#define free           AV_JOIN(MALLOC_PREFIX, free)
    1.54 +
    1.55 +void *malloc(size_t size);
    1.56 +void *memalign(size_t align, size_t size);
    1.57 +int   posix_memalign(void **ptr, size_t align, size_t size);
    1.58 +void *realloc(void *ptr, size_t size);
    1.59 +void  free(void *ptr);
    1.60 +
    1.61 +#endif /* MALLOC_PREFIX */
    1.62 +
    1.63 +
    1.64 +/* You can redefine av_malloc and av_free in your project to use your
    1.65 +   memory allocator. You do not need to suppress this file because the
    1.66 +   linker will do it automatically. */
    1.67 +
    1.68 +void *av_malloc(unsigned int size)
    1.69 +{
    1.70 +    void *ptr = NULL;
    1.71 +    /* let's disallow possible ambiguous cases */
    1.72 +    if(size > (INT_MAX-16) )
    1.73 +        return NULL;
    1.74 +
    1.75 +//FIXME: when no aligned mallocs vector code should be disabled.
    1.76 +#if HAVE_POSIX_MEMALIGN
    1.77 +    if (posix_memalign(&ptr,16,size))
    1.78 +        ptr = NULL;
    1.79 +#elif HAVE_MEMALIGN
    1.80 +    ptr = memalign(16,size);
    1.81 +#else
    1.82 +    ptr = malloc(size);
    1.83 +#endif
    1.84 +    return ptr;
    1.85 +}
    1.86 +
    1.87 +void *av_realloc(void *ptr, unsigned int size)
    1.88 +{
    1.89 +    /* let's disallow possible ambiguous cases */
    1.90 +    if(size > (INT_MAX-16) )
    1.91 +        return NULL;
    1.92 +
    1.93 +    return realloc(ptr, size);
    1.94 +
    1.95 +}
    1.96 +
    1.97 +void av_free(void *ptr)
    1.98 +{
    1.99 +    /* XXX: this test should not be needed on most libcs */
   1.100 +    if (ptr)
   1.101 +        free(ptr);
   1.102 +
   1.103 +}
   1.104 +
   1.105 +void av_freep(void *arg)
   1.106 +{
   1.107 +    void **ptr= (void**)arg;
   1.108 +    av_free(*ptr);
   1.109 +    *ptr = NULL;
   1.110 +}
   1.111 +
   1.112 +void *av_mallocz(unsigned int size)
   1.113 +{
   1.114 +    void *ptr = av_malloc(size);
   1.115 +    if (ptr)
   1.116 +        memset(ptr, 0, size);
   1.117 +    return ptr;
   1.118 +}
   1.119 +
   1.120 +char *av_strdup(const char *s)
   1.121 +{
   1.122 +    char *ptr= NULL;
   1.123 +    if(s){
   1.124 +        int len = strlen(s) + 1;
   1.125 +        ptr = av_malloc(len);
   1.126 +        if (ptr)
   1.127 +            memcpy(ptr, s, len);
   1.128 +    }
   1.129 +    return ptr;
   1.130 +}