1 /* 2 * Copyright (c) 2022 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 16 #ifndef COUNT_DOWN_LATCH_H 17 #define COUNT_DOWN_LATCH_H 18 #include <mutex> 19 #include <condition_variable> 20 #include <chrono> 21 namespace OHOS { 22 namespace WuKong { 23 class CountDownLatch { 24 public: 25 CountDownLatch(int count); 26 27 void countDown(); 28 29 bool await(std::chrono::milliseconds timeout); 30 31 private: 32 int count_; 33 bool done_; 34 std::mutex mtx_; 35 std::condition_variable cv_; 36 CountDownLatch(); 37 }; 38 } // namespace WuKong 39 } // namespace OHOS 40 #endif // COUNT_DOWN_LATCH_H