view/WcsAPI/Stopwatch.h

#pragma once

//////////////////////////////////////////////////////////////////////////

class CStopwatch
{
private:
        LARGE_INTEGER m_liPerfFreq;
        LARGE_INTEGER m_liPerfStart;

public:
        CStopwatch()
        {
                QueryPerformanceFrequency(&m_liPerfFreq);
        }

        virtual ~CStopwatch() {}

        void Start()
        {
                QueryPerformanceCounter(&m_liPerfStart);
        }

        INT64 NowByMillisecond() const
        {
                LARGE_INTEGER liPerfNow;
                QueryPerformanceCounter(&liPerfNow);
                return (INT64)(((liPerfNow.QuadPart - m_liPerfStart.QuadPart) * 1000)
                        / m_liPerfFreq.QuadPart);
        }

        INT64 NowByMicrosecond() const
        {
                LARGE_INTEGER liPerfNow;
                QueryPerformanceCounter(&liPerfNow);
                return (INT64)(((liPerfNow.QuadPart - m_liPerfStart.QuadPart) * 1000000)
                        / m_liPerfFreq.QuadPart);
        }

        double NowBySecond() const
        {
                return static_cast<double>(NowByMicrosecond() / 1000000);
        }

        void GetHMS(CString &cs)
        {
                LARGE_INTEGER liPerfNow;
                UINT  uHour, uMinute, uSecond;
                INT64 liNowTime;

                QueryPerformanceCounter(&liPerfNow);
                liNowTime = (INT64)((liPerfNow.QuadPart - m_liPerfStart.QuadPart) 
                        / m_liPerfFreq.QuadPart);

                uHour   = static_cast<UINT>(liNowTime / 3600);
                uMinute = static_cast<UINT>((liNowTime - uHour * 3600) / 60);
                uSecond = static_cast<UINT>(liNowTime - (uHour * 3600 + uMinute * 60));

                cs.Format(_T("%02d:%02d:%02d"), uHour, uMinute, uSecond);
        }
};

//////////////////////////////////////////////////////////////////////////