63 lines
1.6 KiB
C++
63 lines
1.6 KiB
C++
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/******************************Module*Header*******************************\
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* Module Name: timer.hxx
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*
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* Copyright (c) 1996 Microsoft Corporation
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*
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\**************************************************************************/
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#ifndef __timer_hxx__
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#define __timer_hxx__
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#include <time.h>
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#define MillisToSeconds( dwMillis ) \
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( (float) (dwMillis) / 1000.0f )
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#define SecondsToMillis( fSeconds ) \
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( (DWORD) ((fSeconds) * 1000.0f) )
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// The basic timer is like a stopwatch
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class TIMER {
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public:
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TIMER();
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void Start();
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float Stop();
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void Reset();
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float Elapsed();
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protected:
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DWORD dwStartMillis;
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DWORD dwElapsedMillis;
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DWORD dwTotalMillis;
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BOOL bRunning;
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};
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class UPDATE_TIMER : public TIMER {
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public:
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UPDATE_TIMER( float fUpdateInterval );
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BOOL Update( int numItems, float *fRate );
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void Reset();
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protected:
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int nItems;
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int nTotalItems; // total # items drawn
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float fUpdateRate; // items per second
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DWORD updateInterval; // interval between timer updates in ms
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};
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#define MAX_RESULTS 10
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class AVG_UPDATE_TIMER : public UPDATE_TIMER {
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public:
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AVG_UPDATE_TIMER( float fUpdateInterval, int numResults );
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BOOL Update( int numItems, float *fRate );
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void Reset();
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private:
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float fResults[MAX_RESULTS];
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int nResults; // current # of results
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int nMaxResults; // max # of results for averaging
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int iOldestResult; // index of oldest result
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float fSummedResults; // current sum of results
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};
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#endif // __timer_hxx__
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