Function mspace_realloc_in_place

lib/dlmalloc/malloc.c:5775–5805

}

void* mspace_realloc_in_place(mspace msp, void* oldmem, size_t bytes) {
  void* mem = 0;
  if (oldmem != 0) {
    if (bytes >= MAX_REQUEST) {
      MALLOC_FAILURE_ACTION;
    }
    else {
      size_t nb = request2size(bytes);
      mchunkptr oldp = mem2chunk(oldmem);
#if ! FOOTERS
      mstate m = (mstate)msp;
#else /* FOOTERS */
      mstate m = get_mstate_for(oldp);
      (void)msp; /* placate people compiling -Wunused */
      if (!ok_magic(m)) {
        USAGE_ERROR_ACTION(m, oldmem);
        return 0;
      }
#endif /* FOOTERS */
      if (!PREACTION(m)) {
        mchunkptr newp = try_realloc_chunk(m, oldp, nb, 0);
        POSTACTION(m);
        if (newp == oldp) {
          check_inuse_chunk(m, newp);
          mem = oldmem;
        }
      }
    }
  }
  return mem;
}

void* mspace_memalign(mspace msp, size_t alignment, size_t bytes) {
  mstate ms = (mstate)msp;