Timer.hpp

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#pragma once
 
#include <cstdio>
#include <ctime>
#include <chrono>
 
namespace mltk{
    class  Timer {
    private:
        using Clock = std::chrono::high_resolution_clock;
        typename Clock::time_point start_point;
    public:
        inline Timer() : start_point(Clock::now()) {}
        inline void reset(){ start_point = Clock::now(); }
        template <typename Rep = double, typename Units = typename std::chrono::milliseconds>
        inline double elapsed() const {
            std::atomic_thread_fence(std::memory_order_relaxed);
            auto counted_time = std::chrono::duration_cast<Units>(Clock::now() - start_point).count();
            std::atomic_thread_fence(std::memory_order_relaxed);
            return static_cast<Rep>(counted_time);
        }
    };
}