Martin Stjernholm | 4fb5111 | 2021-04-30 11:53:52 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2017 The Android Open Source Project |
| 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 | #pragma once |
| 18 | |
| 19 | #include <chrono> |
| 20 | #include <sstream> |
| 21 | |
| 22 | #if __cplusplus > 201103L && !defined(__WIN32) // C++14 |
| 23 | using namespace std::chrono_literals; |
| 24 | #endif |
| 25 | |
| 26 | namespace android { |
| 27 | namespace base { |
| 28 | |
| 29 | // A std::chrono clock based on CLOCK_BOOTTIME. |
| 30 | class boot_clock { |
| 31 | public: |
| 32 | typedef std::chrono::nanoseconds duration; |
| 33 | typedef std::chrono::time_point<boot_clock, duration> time_point; |
| 34 | |
| 35 | static time_point now(); |
| 36 | }; |
| 37 | |
| 38 | class Timer { |
| 39 | public: |
| 40 | Timer() : start_(boot_clock::now()) {} |
| 41 | |
| 42 | std::chrono::milliseconds duration() const { |
| 43 | return std::chrono::duration_cast<std::chrono::milliseconds>(boot_clock::now() - start_); |
| 44 | } |
| 45 | |
| 46 | private: |
| 47 | boot_clock::time_point start_; |
| 48 | }; |
| 49 | |
| 50 | std::ostream& operator<<(std::ostream& os, const Timer& t); |
| 51 | |
| 52 | } // namespace base |
| 53 | } // namespace android |