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/*
* 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.
*/
#ifndef ANDROID_BASE_CHRONO_UTILS_H
#define ANDROID_BASE_CHRONO_UTILS_H
#include <chrono>
#include <sstream>
#if __cplusplus > 201103L && !defined(__WIN32) // C++14
using namespace std::chrono_literals;
#endif
namespace android {
namespace base {
// A std::chrono clock based on CLOCK_BOOTTIME.
class boot_clock {
public:
typedef std::chrono::nanoseconds duration;
typedef std::chrono::time_point<boot_clock, duration> time_point;
static time_point now();
};
class Timer {
public:
Timer() : start_(boot_clock::now()) {}
std::chrono::milliseconds duration() const {
return std::chrono::duration_cast<std::chrono::milliseconds>(boot_clock::now() - start_);
}
private:
boot_clock::time_point start_;
};
std::ostream& operator<<(std::ostream& os, const Timer& t);
} // namespace base
} // namespace android
#endif // ANDROID_BASE_CHRONO_UTILS_H
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