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54 lines
1.4 KiB
54 lines
1.4 KiB
4 months ago
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/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <chrono>
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#include <sstream>
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#if __cplusplus > 201103L && !defined(__WIN32) // C++14
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using namespace std::chrono_literals;
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#endif
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namespace android {
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namespace base {
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// A std::chrono clock based on CLOCK_BOOTTIME.
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class boot_clock {
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public:
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typedef std::chrono::nanoseconds duration;
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typedef std::chrono::time_point<boot_clock, duration> time_point;
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static time_point now();
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};
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class Timer {
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public:
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Timer() : start_(boot_clock::now()) {}
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std::chrono::milliseconds duration() const {
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return std::chrono::duration_cast<std::chrono::milliseconds>(boot_clock::now() - start_);
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}
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private:
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boot_clock::time_point start_;
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};
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std::ostream& operator<<(std::ostream& os, const Timer& t);
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} // namespace base
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} // namespace android
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