apps/codecs/libtremor/oggmalloc.c

   1 #include "os_types.h"
   2
   3 static size_t tmp_ptr;
   4
   5 void ogg_malloc_init(void)
   6 {
   7     mallocbuf = ci->codec_get_buffer(&bufsize);
   8     tmp_ptr = bufsize & ~3;
   9     mem_ptr = 0;
  10 }
  11
  12 void *ogg_malloc(size_t size)
  13 {
  14     void* x;
  15
  16     size = (size + 3) & ~3;
  17
  18     if (mem_ptr + size > tmp_ptr)
  19         return NULL;
  20
  21     x = &mallocbuf[mem_ptr];
  22     mem_ptr += size; /* Keep memory 32-bit aligned */
  23
  24     return x;
  25 }
  26
  27 void *ogg_tmpmalloc(size_t size)
  28 {
  29     size = (size + 3) & ~3;
  30
  31     if (mem_ptr + size > tmp_ptr)
  32         return NULL;
  33
  34     tmp_ptr -= size;
  35     return &mallocbuf[tmp_ptr];
  36 }
  37
  38 void *ogg_calloc(size_t nmemb, size_t size)
  39 {
  40     void *x;
  41     x = ogg_malloc(nmemb * size);
  42     if (x == NULL)
  43         return NULL;
  44     ci->memset(x, 0, nmemb * size);
  45     return x;
  46 }
  47
  48 void *ogg_tmpcalloc(size_t nmemb, size_t size)
  49 {
  50     void *x;
  51     x = ogg_tmpmalloc(nmemb * size);
  52     if (x == NULL)
  53         return NULL;
  54     ci->memset(x, 0, nmemb * size);
  55     return x;
  56 }
  57
  58 void *ogg_realloc(void *ptr, size_t size)
  59 {
  60     void *x;
  61     (void)ptr;
  62     x = ogg_malloc(size);
  63     return x;
  64 }
  65
  66 long ogg_tmpmalloc_pos(void)
  67 {
  68     return tmp_ptr;
  69 }
  70
  71 void ogg_tmpmalloc_free(long pos)
  72 {
  73     tmp_ptr = pos;
  74 }