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//
// Created by Keuin on 2022/4/11.
//
#ifndef RT_TIMER_H
#define RT_TIMER_H
#include <iostream>
#include <chrono>
class timer {
private:
decltype(std::chrono::system_clock::now()) start_time;
decltype(std::chrono::system_clock::now()) end_time;
bool silent;
public:
timer() : silent{false} {}
explicit timer(bool silent) : silent{silent} {}
void start_measure() {
if (!silent) {
fprintf(stderr, "Start timing...\n");
}
start_time = std::chrono::system_clock::now();
}
void stop_measure() {
end_time = std::chrono::system_clock::now();
const auto duration = std::chrono::duration_cast<std::chrono::nanoseconds>(end_time - start_time);
const auto secs = 1e-3 * duration.count() * std::chrono::microseconds::period::num / std::chrono::microseconds::period::den;
if (!silent) {
fprintf(stderr, "Stop timing. Duration: %fs\n", secs);
}
}
// Get seconds elapsed.
std::chrono::duration<double> duration() {
return end_time - start_time;
}
};
#endif //RT_TIMER_H
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