1 /* 2 * Copyright (c) 2021 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 #ifndef OHOS_PROFILER_PTHREAD_SEMAPHORE_H 16 #define OHOS_PROFILER_PTHREAD_SEMAPHORE_H 17 18 #include <memory> 19 #include <pthread.h> 20 21 #include "i_semaphore.h" 22 23 class PthreadSemaphore : public ISemaphore { 24 public: 25 explicit PthreadSemaphore(unsigned int value); 26 ~PthreadSemaphore(); 27 28 bool Wait() override; 29 bool TryWait() override; 30 bool TimedWait(int seconds, int nanoSeconds) override; 31 bool Post() override; 32 unsigned int Value() const override; 33 34 private: 35 bool TryWaitLocked(); 36 mutable pthread_mutex_t mutex_ {}; 37 mutable pthread_cond_t cond_ {}; 38 volatile unsigned int value_ = 0; 39 }; 40 41 class PthreadSemaphoreFactory : public ISemaphoreFactory { 42 public: 43 SemaphorePtr Create(unsigned int value) override; 44 }; 45 46 #endif // OHOS_PROFILER_PTHREAD_SEMAPHORE_H