1 /** 2 * Copyright 2019-2021 Huawei Technologies Co., Ltd 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 #ifndef MINDSPORE_CCSRC_MINDDATA_DATASET_UTIL_COND_VAR_H_ 17 #define MINDSPORE_CCSRC_MINDDATA_DATASET_UTIL_COND_VAR_H_ 18 19 #include <condition_variable> 20 #include <functional> 21 #include <memory> 22 #include <mutex> 23 #include <string> 24 #include "minddata/dataset/util/intrp_resource.h" 25 #include "minddata/dataset/util/intrp_service.h" 26 #include "minddata/dataset/util/status.h" 27 28 namespace mindspore { 29 namespace dataset { 30 class CondVar : public IntrpResource { 31 public: 32 CondVar(); 33 34 ~CondVar() noexcept; 35 36 Status Wait(std::unique_lock<std::mutex> *lck, const std::function<bool()> &pred); 37 38 /// Timed sleep. 39 /// \param lck lock 40 /// \param duration time to sleep in ms 41 /// \return Status code 42 Status WaitFor(std::unique_lock<std::mutex> *lck, int64_t duration); 43 44 void Interrupt() override; 45 46 void NotifyOne() noexcept; 47 48 void NotifyAll() noexcept; 49 50 Status Register(std::shared_ptr<IntrpService> svc); 51 52 std::string my_name() const; 53 54 Status Deregister(); 55 56 protected: 57 std::condition_variable cv_; 58 std::shared_ptr<IntrpService> svc_; 59 60 private: 61 std::string my_name_; 62 }; 63 } // namespace dataset 64 } // namespace mindspore 65 #endif // MINDSPORE_CCSRC_MINDDATA_DATASET_UTIL_COND_VAR_H_ 66