luna_mobile_online/include/vlc/timer.h

#pragma once

#include <chrono>

namespace vlc
{
	struct Timer
	{
		using time_point = std::chrono::high_resolution_clock::time_point;

		time_point start_time;
		double duration = 0; // Duration between last call of end and start_time
		double total_duration = 0;

		static inline time_point now()
		{
			return std::chrono::high_resolution_clock::now();
		}

		static inline double ms_duration_between(const time_point start_time, const time_point end_time)
		{
			std::chrono::duration<double, std::milli> fp_ms = end_time - start_time;
			return fp_ms.count();
		}

		void reset()
		{
			duration = total_duration = 0;
		}

		void start()
		{
			start_time = now();
		}

		double stop()
		{
			auto end_time = now();
			duration = ms_duration_between(start_time, end_time);

			total_duration += duration;

			return duration;
		}
	};
}