timer.hpp

// By Emil Ernerfeldt 2012-2016
// LICENSE:
//   This software is dual-licensed to the public domain and under the following
//   license: you are granted a perpetual, irrevocable license to copy, modify,
//   publish, and distribute this file as you see fit.
// HISTORY:
//   Created in 2012-05-26.

#pragma once

#include <chrono>

namespace emilib {

class Timer
{
public:
    Timer();

    double reset();

    double secs() const;
    unsigned long long nanoseconds() const;

    void set_secs(double s);
    void set_nanoseconds(double s);

    static double seconds_since_startup();

private:
    using Clock = std::chrono::steady_clock; // Always counting up.
    Clock::time_point _start;
};

} // namespace emilib