1 /* 2 * Copyright (c) 2022-2023 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 ELAPSED_TIME_H 17 #define ELAPSED_TIME_H 18 19 #include <chrono> 20 21 namespace OHOS { 22 namespace HiviewDFX { 23 class ElapsedTime { 24 public: ElapsedTime()25 ElapsedTime() 26 { 27 begin_ = std::chrono::high_resolution_clock::now(); 28 }; 29 ~ElapsedTime()30 ~ElapsedTime() {}; 31 Reset()32 void Reset() 33 { 34 begin_ = std::chrono::high_resolution_clock::now(); 35 }; 36 37 template<typename Duration=std::chrono::nanoseconds> Elapsed()38 time_t Elapsed() const 39 { 40 return std::chrono::duration_cast<Duration>(std::chrono::high_resolution_clock::now() - begin_).count(); 41 }; 42 43 private: 44 std::chrono::time_point<std::chrono::high_resolution_clock> begin_; 45 }; 46 } 47 } 48 #endif 49