C++ (Cpp) SET_SENTINELの例

コード例 #1

ファイル: memarea.c プロジェクト: 80Z/Stealth

/** Helper: allocate a new memarea chunk of around <b>chunk_size</b> bytes. */
static memarea_chunk_t *
alloc_chunk(size_t sz, int freelist_ok)
{
  tor_assert(sz < SIZE_T_CEILING);
  if (freelist && freelist_ok) {
    memarea_chunk_t *res = freelist;
    freelist = res->next_chunk;
    res->next_chunk = NULL;
    --freelist_len;
    CHECK_SENTINEL(res);
    return res;
  } else {
    size_t chunk_size = freelist_ok ? CHUNK_SIZE : sz;
    memarea_chunk_t *res;
    chunk_size += SENTINEL_LEN;
    res = tor_malloc(chunk_size);
    res->next_chunk = NULL;
    res->mem_size = chunk_size - CHUNK_HEADER_SIZE - SENTINEL_LEN;
    res->next_mem = res->U_MEM;
    tor_assert(res->next_mem+res->mem_size+SENTINEL_LEN ==
               ((char*)res)+chunk_size);
    tor_assert(realign_pointer(res->next_mem) == res->next_mem);
    SET_SENTINEL(res);
    return res;
  }
}

コード例 #2

ファイル: memarea.c プロジェクト: Samdney/tor

/** Helper: allocate a new memarea chunk of around <b>chunk_size</b> bytes. */
static memarea_chunk_t *
alloc_chunk(size_t sz)
{
  tor_assert(sz < SIZE_T_CEILING);

  size_t chunk_size = sz < CHUNK_SIZE ? CHUNK_SIZE : sz;
  memarea_chunk_t *res;
  chunk_size += SENTINEL_LEN;
  res = tor_malloc(chunk_size);
  res->next_chunk = NULL;
  res->mem_size = chunk_size - CHUNK_HEADER_SIZE - SENTINEL_LEN;
  res->next_mem = res->U_MEM;
  tor_assert(res->next_mem+res->mem_size+SENTINEL_LEN ==
             ((char*)res)+chunk_size);
  tor_assert(realign_pointer(res->next_mem) == res->next_mem);
  SET_SENTINEL(res);
  return res;
}