/*
 * Timer.h
 *
 *  Created on: 21 дек. 2021 г.
 *      Author: alexander
 */

#pragma once

#include <chrono>

class Timer
{
public:
    static Timer& getInstance()
    {
        static Timer _instance;
        return _instance;
    }

    void start()
    {
        m_beg = clock_t::now();
    }

    double end() const
    {
        return elapsed() * 1000;
    }

private:
    using clock_t = std::chrono::high_resolution_clock;
    using second_t = std::chrono::duration<double, std::ratio<1> >;

    std::chrono::time_point<clock_t> m_beg;

    double elapsed() const
    {
        return std::chrono::duration_cast<second_t>(clock_t::now() - m_beg).count();
    }

    Timer() {}
    Timer(const Timer&) = delete;
    Timer& operator=(const Timer&) = delete;
    Timer& operator=(Timer&&) = delete;
};