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/*
* Copyright (C) 2016 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 NETDUTILS_STOPWATCH_H
#define NETDUTILS_STOPWATCH_H
#include <chrono>
namespace android {
namespace netdutils {
class Stopwatch {
private:
using clock = std::chrono::steady_clock;
using time_point = std::chrono::time_point<clock>;
public:
Stopwatch() : mStart(clock::now()) {}
virtual ~Stopwatch() = default;
int64_t timeTakenUs() const { return getElapsedUs(clock::now()); }
int64_t getTimeAndResetUs() {
const auto& now = clock::now();
int64_t elapsed = getElapsedUs(now);
mStart = now;
return elapsed;
}
private:
time_point mStart;
int64_t getElapsedUs(const time_point& now) const {
return (std::chrono::duration_cast<std::chrono::microseconds>(now - mStart)).count();
}
};
} // namespace netdutils
} // namespace android
#endif // NETDUTILS_STOPWATCH_H
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