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heavyai_shared_mutex.h
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1 /*
2  * Copyright 2022 HEAVY.AI, 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 <mutex>
20 #include <shared_mutex>
21 
22 #ifdef HAVE_FOLLY
23 #include <folly/SharedMutex.h>
24 namespace heavyai {
25 using shared_mutex = folly::SharedMutex;
26 } // namespace heavyai
27 // Folly includes windows.h and pollutes global namespace with macroses
29 #else
30 namespace heavyai {
31 using shared_mutex = std::shared_timed_mutex;
32 } // namespace heavyai
33 #endif // HAVE_FOLLY
34 
35 namespace heavyai {
36 template <typename T>
37 using lock_guard = std::lock_guard<T>;
38 template <typename T>
39 using unique_lock = std::unique_lock<T>;
40 template <typename T>
41 using shared_lock = std::shared_lock<T>;
42 } // namespace heavyai
std::lock_guard< T > lock_guard
std::shared_lock< T > shared_lock
std::unique_lock< T > unique_lock
std::shared_timed_mutex shared_mutex