Dario Sassi
43 lines
1.3 KiB
C++
43 lines
1.3 KiB
C++
//----------------------------------------------------------------------------
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// EgalTech 2013-2014
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//----------------------------------------------------------------------------
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// File : EgtPerfCounter.h Data : 14.01.14 Versione : 1.5a3
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// Contenuto : Oggetto cronometro.
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//
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//
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//
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// Modifiche : 14.01.14 DS Creazione modulo.
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//
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//
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//----------------------------------------------------------------------------
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#pragma once
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#define NOMINMAX
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#include <Windows.h>
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//----------------------------------------------------------------------------
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class PerformanceCounter
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{
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public :
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PerformanceCounter( void)
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{ QueryPerformanceFrequency( (LARGE_INTEGER*) &m_lnFreq) ;
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if ( m_lnFreq <= 0)
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m_lnFreq = 1 ;
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Start() ; }
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void Start( void)
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{ QueryPerformanceCounter( (LARGE_INTEGER*) &m_lnStart) ; }
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double Stop( void)
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{ __int64 lnStop ;
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QueryPerformanceCounter( (LARGE_INTEGER*) &lnStop) ;
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m_dTime = ( (double) lnStop - (double) m_lnStart) / (double) m_lnFreq * 1000 ;
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return m_dTime ; }
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double GetTime( void)
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{ return m_dTime ; }
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private :
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__int64 m_lnFreq ;
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__int64 m_lnStart ;
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double m_dTime ; // in millisecondi
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} ;
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