libsa/malloc_unused

   1 /*********************************************************************
   2 * free_all()
   3 *
   4 * Empties all memory regions so that their entire buffer space is
   5 * considered unused. This allows the client to restart without
   6 * having to reallocate memory for the allocator regions, which helps
   7 * performance when this package gets used serially.
   8 *********************************************************************/
   9 __private_extern__
  10 void free_all(void) {
  11     malloc_region * cur_region;
  12
  13     queue_iterate(&malloc_region_list, cur_region, malloc_region *, links) {
  14
  15         queue_init(&cur_region->block_list);
  16         cur_region->free_size = cur_region->region_size - sizeof(malloc_region);
  17         cur_region->free_address = &cur_region->buffer;
  18
  19     }
  20
  21     queue_init(&sorted_free_block_list);
  22
  23 #ifdef CLIENT_DEBUG
  24     current_block_total = 0;
  25 #endif /* CLIENT_DEBUG */
  26
  27     return;
  28
  29 } /* free_all() */
  30
  31
  32 /*********************************************************************
  33 * malloc_size()
  34 *
  35 *********************************************************************/
  36 __private_extern__
  37 size_t malloc_size(void * address) {
  38     malloc_region * found_region = NULL;
  39     malloc_block  * found_block = NULL;
  40
  41     malloc_find_block(address, &found_block, &found_region);
  42
  43
  44    /* If we couldn't find the requested block,
  45     * the caller is in error so return 0.
  46     */
  47     if (found_block == NULL) {
  48         return 0;
  49         // FIXME: panic?
  50     }
  51
  52     return (found_block->block_size - sizeof(malloc_block));
  53
  54 } /* malloc_size() */
  55
  56
  57 /*********************************************************************
  58 * malloc_is_valid()
  59 *
  60 *********************************************************************/
  61 __private_extern__
  62 int malloc_is_valid(void * address){
  63     malloc_region * found_region = NULL;
  64     malloc_block  * found_block = NULL;
  65
  66     malloc_find_block(address, &found_block, &found_region);
  67
  68     if (found_block != NULL) {
  69         return 1;
  70     } else {
  71         return 0;
  72     }
  73
  74 } /* malloc_is_valid() */
  75
  76