| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #pragma once |
| |
| #include <chrono> |
| |
| namespace slicer { |
| |
| // A very simple timing chronometer |
| class Chronometer { |
| using Clock = std::chrono::high_resolution_clock; |
| |
| public: |
| // elapsed time is in milliseconds |
| Chronometer(double& elapsed, bool cumulative = false) : |
| elapsed_(elapsed), cumulative_(cumulative) { |
| start_time_ = Clock::now(); |
| } |
| |
| ~Chronometer() { |
| Clock::time_point end_time = Clock::now(); |
| std::chrono::duration<double, std::milli> ms = end_time - start_time_; |
| if (cumulative_) { |
| elapsed_ += ms.count(); |
| } else { |
| elapsed_ = ms.count(); |
| } |
| } |
| |
| Chronometer(const Chronometer&) = delete; |
| Chronometer& operator=(const Chronometer&) = delete; |
| |
| private: |
| double& elapsed_; |
| Clock::time_point start_time_; |
| bool cumulative_; |
| }; |
| |
| } // namespace slicer |
| |