79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
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/*
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* Tencent is pleased to support the open source community by making
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* MMKV available.
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*
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* Copyright (C) 2018 THL A29 Limited, a Tencent company.
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* All rights reserved.
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*
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* Licensed under the BSD 3-Clause License (the "License"); you may not use
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* this file except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* https://opensource.org/licenses/BSD-3-Clause
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef MMKV_THREADLOCK_H
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#define MMKV_THREADLOCK_H
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#ifdef __cplusplus
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#include "MMKVPredef.h"
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#ifndef MMKV_WIN32
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# include <pthread.h>
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# define MMKV_USING_PTHREAD 1
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#endif
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#if MMKV_USING_PTHREAD
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#else
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# include <atomic>
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#endif
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namespace mmkv {
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#if MMKV_USING_PTHREAD
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# define ThreadOnceToken_t pthread_once_t
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# define ThreadOnceUninitialized PTHREAD_ONCE_INIT
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#else
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enum ThreadOnceTokenEnum : int32_t { ThreadOnceUninitialized = 0, ThreadOnceInitializing, ThreadOnceInitialized };
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using ThreadOnceToken_t = std::atomic<ThreadOnceTokenEnum>;
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#endif
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class ThreadLock {
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private:
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#if MMKV_USING_PTHREAD
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pthread_mutex_t m_lock;
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#else
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CRITICAL_SECTION m_lock;
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#endif
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public:
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ThreadLock();
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~ThreadLock();
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void initialize();
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void lock();
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void unlock();
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static void ThreadOnce(ThreadOnceToken_t *onceToken, void (*callback)(void));
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#ifdef MMKV_WIN32
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static void Sleep(int ms);
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#endif
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// just forbid it for possibly misuse
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explicit ThreadLock(const ThreadLock &other) = delete;
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ThreadLock &operator=(const ThreadLock &other) = delete;
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};
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} // namespace mmkv
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#endif
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#endif //MMKV_THREADLOCK_H
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