Source code of Windows XP (NT5)
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//+------------------------------------------------------------------------
//
// Microsoft Windows
// Copyright (C) Microsoft Corporation, 1993.
//
// File: stopwtch.hxx
//
// Contents: class definition for performance timer
//
// Classes: CStopWatch
//
// Functions:
//
// History: 8-July-93 t-martig Created
//
//--------------------------------------------------------------------------
#ifndef __STOPWTCH_H
#define __STOPWTCH_H
class CStopWatch
{
public:
CStopWatch();
ULONG Read ();
void Reset ();
ULONG Resolution ();
private:
LARGE_INTEGER liStart;
LARGE_INTEGER liFreq;
};
// Helper functions to make the code cleaner when you want to be
// able to get both the individual and average times.
inline void ResetAverage( BOOL fAverage, CStopWatch &sw )
{
if (fAverage)
sw.Reset();
}
inline void ResetNotAverage( BOOL fAverage, CStopWatch &sw )
{
if (!fAverage)
sw.Reset();
}
inline void ReadAverage( BOOL fAverage, CStopWatch &sw,
ULONG &ulTime, ULONG ulIterations )
{
if (fAverage)
ulTime = sw.Read() / ulIterations;
}
inline void ReadNotAverage( BOOL fAverage, CStopWatch &sw, ULONG &ulTime )
{
if (!fAverage)
ulTime = sw.Read();
}
#endif // __STOPWTCH_H