1 /** 2 * Copyright 2020-2021 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 17 #ifndef MINDSPORE_LITE_TOOLS_COMMON_PERSIST_FUTURE_H_ 18 #define MINDSPORE_LITE_TOOLS_COMMON_PERSIST_FUTURE_H_ 19 20 #include <future> 21 22 namespace mindspore::lite { 23 template <typename T> 24 class PersistFuture { 25 public: PersistFuture()26 PersistFuture() { future_ = promise_.get_future(); } 27 SetValue(T value)28 void SetValue(T value) { promise_.set_value(value); } 29 GetValue()30 T GetValue() { 31 if (future_.valid()) { 32 value_ = future_.get(); 33 } 34 return value_; 35 } 36 37 private: 38 std::future<T> future_; 39 std::promise<T> promise_; 40 T value_; 41 }; 42 } // namespace mindspore::lite 43 44 #endif // MINDSPORE_LITE_TOOLS_COMMON_PERSIST_FUTURE_H_ 45