timer.h

// Timer Class Interface
// Written by Sergey Kosov in 2015 for Project X
#pragma once

#include "types.h"

namespace DirectGraphicalModels
{
    // ================================ Timer Namespace ==============================
    namespace Timer 
    {
        static int64 m_ticks = 0;

        void start(const std::string &str) 
        {
            printf("%s ", str.c_str());
            m_ticks = getTickCount();
        }

        void stop(void) 
        {
            int64 ms = static_cast<int64>(1000 * (getTickCount() - m_ticks) / getTickFrequency());
            int64 sec = 0;
            int64 min = 0;
            int64 hrs = 0;

            if (ms >= 1000) {
                sec = ms / 1000;
                ms = ms % 1000;
            }
            if (sec >= 60) {
                min = sec / 60;
                sec = sec % 60;
            }
            if (min > 60) {
                hrs = min / 60;
                min = min % 60;
            }

            printf("Done! (");
            if (hrs) printf("%lld:", hrs);
            if (min) printf("%lld:", min);
            if (sec) printf("%lld'", sec);
            printf("%03lld ms)\n", ms);
        }
    }
}