contrib/jemalloc/src/extent_mmap.c

   1 #define JEMALLOC_EXTENT_MMAP_C_
   2 #include "jemalloc/internal/jemalloc_preamble.h"
   3 #include "jemalloc/internal/jemalloc_internal_includes.h"
   4
   5 #include "jemalloc/internal/assert.h"
   6 #include "jemalloc/internal/extent_mmap.h"
   7
   8 /******************************************************************************/
   9 /* Data. */
  10
  11 bool    opt_retain =
  12 #ifdef JEMALLOC_RETAIN
  13     true
  14 #else
  15     false
  16 #endif
  17     ;
  18
  19 /******************************************************************************/
  20
  21 void *
  22 extent_alloc_mmap(void *new_addr, size_t size, size_t alignment, bool *zero,
  23     bool *commit) {
  24         void *ret = pages_map(new_addr, size, ALIGNMENT_CEILING(alignment,
  25             PAGE), commit);
  26         if (ret == NULL) {
  27                 return NULL;
  28         }
  29         assert(ret != NULL);
  30         if (*commit) {
  31                 *zero = true;
  32         }
  33         return ret;
  34 }
  35
  36 bool
  37 extent_dalloc_mmap(void *addr, size_t size) {
  38         if (!opt_retain) {
  39                 pages_unmap(addr, size);
  40         }
  41         return opt_retain;
  42 }