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libs/Common/Timer.h

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+////////////////////////////////////////////////////////////////////
+// Timer.h
+//
+// Copyright 2007 cDc@seacave
+// Distributed under the Boost Software License, Version 1.0
+// (See http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef  __SEACAVE_TIMER_H__
+#define  __SEACAVE_TIMER_H__
+
+
+// I N C L U D E S /////////////////////////////////////////////////
+
+
+// D E F I N E S ///////////////////////////////////////////////////
+
+#ifdef _MSC_VER
+//#define TIMER_OLDSUPPORT
+#endif
+#define FIX_FPS
+
+
+namespace SEACAVE {
+
+// S T R U C T S ///////////////////////////////////////////////////
+
+class GENERAL_API Timer
+{
+public:
+	typedef int64_t SysType;
+	typedef float Type;
+
+public:
+	Timer(uint8_t nHH=0, uint8_t nMM=0);
+	~Timer();
+
+	void	Update();
+
+	void	SetClock(uint8_t nHH, uint8_t nMM);
+	LPTSTR	GetClock(uint8_t* nHH, uint8_t* nMM, LPTSTR szChar) const;
+
+	#ifdef FIX_FPS
+	inline uint32_t	GetFPS() const			{ return m_nLastSecFrames; }
+	#else
+	inline uint32_t	GetFPS() const			{ return (uint32_t)(1.f / m_fElapsedTime); }
+	#endif // FIX_FPS
+
+	inline Type		GetRealCurrent() const	{ return SysTime2Time(m_nCrntTime); }
+	inline Type		GetCurrent() const		{ return m_fTimeScale * SysTime2Time(m_nCrntTime); }
+	inline Type		GetRealElapsed() const	{ return m_fElapsedTime; }
+	inline Type		GetElapsed() const		{ return m_fTimeScale * m_fElapsedTime; }
+	inline Type		GetDelay(Type d) const	{ return m_fTimeScale * d; }
+	inline Type		GetScale() const		{ return m_fTimeScale; }
+	inline void		SetScale(Type fFactor)	{ m_fTimeScale = fFactor; }
+
+private:
+	SysType		m_nCrntTime;			// current time
+	Type		m_fElapsedTime;			// time elapsed since previous frame
+	Type		m_fTimeScale;			// slowdown or speedup
+	uint8_t		m_nHH;					// clock time hours
+	uint8_t		m_nMM;					// clock time minutes
+	uint8_t		m_nSS;					// clock time seconds
+	Type		m_fClock;				// sum up milliseconds
+	#ifdef FIX_FPS
+	Type		m_fCurrentFramesTime;	// time elapsed for the current frames
+	uint32_t	m_nCurrentFrames;		// counter of the current frames
+	uint32_t	m_nLastSecFrames;		// counter of the frames in the last second
+	#endif // FIX_FPS
+
+public:
+	// get current time in system units
+	static inline SysType GetSysTime() {
+		#ifdef _MSC_VER
+		#ifdef TIMER_OLDSUPPORT
+		if (!ms_bPerfFlag)
+			return GetTickCount();
+		#endif
+		SysType nTime;
+		QueryPerformanceCounter((LARGE_INTEGER*)&nTime);
+		return nTime;
+		#else
+		timeval tv;
+		gettimeofday(&tv, NULL);
+		return (tv.tv_sec * 1000000) + tv.tv_usec;
+		#endif // _MSC_VER
+	}
+	// get milliseconds scaling factor for time
+	static Type GetTimeFactor();
+	// get current time in milliseconds
+	static inline Type GetTimeMs() {
+		return GetTimeFactor() * GetSysTime();
+	}
+	// get current time in seconds
+	static inline Type GetTime() {
+		return 0.001f * GetTimeFactor() * GetSysTime();
+	}
+	// convert given time to milliseconds
+	static inline Type SysTime2TimeMs(SysType t) {
+		return GetTimeFactor() * t;
+	}
+	// convert given time to seconds
+	static inline Type SysTime2Time(SysType t) {
+		return 0.001f * GetTimeFactor() * t;
+	}
+
+protected:
+	#ifdef TIMER_OLDSUPPORT
+	static const bool	ms_bPerfFlag;	// flag for timer to use
+	#endif
+	static const Type	ms_fTimeFactor;	// milliseconds scaling factor for time
+};
+/*----------------------------------------------------------------*/
+
+
+class GENERAL_API AutoTimer
+{
+public:
+	typedef Timer::Type Type;
+public:
+	AutoTimer(Type& duration) : m_duration(duration) { m_duration = Timer::GetTime(); }
+	~AutoTimer() { m_duration = Timer::GetTime() - m_duration; }
+protected:
+	Type&	m_duration;
+};
+
+class GENERAL_API AutoAddTimer
+{
+public:
+	typedef Timer::Type Type;
+public:
+	AutoAddTimer(Type& duration) : m_duration(duration) { m_lastTime = Timer::GetTime(); }
+	~AutoAddTimer() { m_duration += Timer::GetTime() - m_lastTime; }
+protected:
+	Type&	m_duration;
+	Type	m_lastTime;
+};
+/*----------------------------------------------------------------*/
+
+} // namespace SEACAVE
+
+#endif // __SEACAVE_TIMER_H__