1/*
2 * Copyright 2016-present Facebook, Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#pragma once
18
19#include <stdlib.h>
20
21#include <folly/CPortability.h>
22#include <folly/portability/Config.h>
23
24#if (defined(USE_JEMALLOC) || defined(FOLLY_USE_JEMALLOC)) && !FOLLY_SANITIZE
25// JEMalloc provides it's own implementation of
26// malloc_usable_size, and that's what we should be using.
27#include <jemalloc/jemalloc.h>
28#else
29#ifndef __APPLE__
30#include <malloc.h>
31#endif
32
33#if defined(__APPLE__) && !defined(FOLLY_HAVE_MALLOC_USABLE_SIZE)
34// MacOS doesn't have malloc_usable_size()
35extern "C" size_t malloc_usable_size(void* ptr);
36#elif defined(_WIN32)
37extern "C" size_t malloc_usable_size(void* ptr);
38#endif
39#endif
40