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 #include "semaphore_ex.h" 16 17 using namespace std; 18 19 namespace OHOS { Wait()20void Semaphore::Wait() 21 { 22 std::unique_lock<std::mutex> lck(mutex_); 23 if (--count_ < 0) { 24 cv_.wait(lck); 25 } 26 } 27 Post()28void Semaphore::Post() 29 { 30 std::unique_lock<mutex> lck(mutex_); 31 if (++count_ <= 0) { 32 cv_.notify_one(); 33 } 34 } 35 36 } // namespace OHOS 37