1/*
2 * Copyright 2014-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#include <folly/memory/detail/MallocImpl.h>
18
19extern "C" {
20
21#ifdef _MSC_VER
22// MSVC doesn't have weak symbols, so do some linker magic
23// to emulate them. (the magic is in the header)
24const char* mallocxWeak = nullptr;
25const char* rallocxWeak = nullptr;
26const char* xallocxWeak = nullptr;
27const char* sallocxWeak = nullptr;
28const char* dallocxWeak = nullptr;
29const char* sdallocxWeak = nullptr;
30const char* nallocxWeak = nullptr;
31const char* mallctlWeak = nullptr;
32const char* mallctlnametomibWeak = nullptr;
33const char* mallctlbymibWeak = nullptr;
34#elif !FOLLY_HAVE_WEAK_SYMBOLS
35void* (*mallocx)(size_t, int) = nullptr;
36void* (*rallocx)(void*, size_t, int) = nullptr;
37size_t (*xallocx)(void*, size_t, size_t, int) = nullptr;
38size_t (*sallocx)(const void*, int) = nullptr;
39void (*dallocx)(void*, int) = nullptr;
40void (*sdallocx)(void*, size_t, int) = nullptr;
41size_t (*nallocx)(size_t, int) = nullptr;
42int (*mallctl)(const char*, void*, size_t*, void*, size_t) = nullptr;
43int (*mallctlnametomib)(const char*, size_t*, size_t*) = nullptr;
44int (*mallctlbymib)(const size_t*, size_t, void*, size_t*, void*, size_t) =
45 nullptr;
46#endif
47}
48