112 lines
2.5 KiB
C++
112 lines
2.5 KiB
C++
//+--------------------------------------------------------------------------
|
|
//
|
|
// Microsoft Windows
|
|
// Copyright (C) Microsoft Corporation, 1996.
|
|
//
|
|
// File: B E N C H M R K . C P P
|
|
//
|
|
// Contents: Benchmarking class
|
|
//
|
|
// Notes:
|
|
//
|
|
// Author: billbe 13 Oct 1997
|
|
//
|
|
//---------------------------------------------------------------------------
|
|
|
|
#include <pch.h>
|
|
#pragma hdrstop
|
|
#include "benchmrk.h"
|
|
|
|
CBenchmark::CBenchmark()
|
|
: m_i64Frequency(1000),
|
|
m_sznDescription(NULL),
|
|
m_i64TotalTime(0),
|
|
m_fStarted(FALSE)
|
|
{
|
|
LARGE_INTEGER li1;
|
|
|
|
// Check if QueryPerformanceCounter is supported
|
|
if (QueryPerformanceCounter(&li1))
|
|
{
|
|
// Now get # of ticks per second
|
|
QueryPerformanceFrequency(reinterpret_cast<LARGE_INTEGER*>
|
|
(&m_i64Frequency));
|
|
|
|
m_fSupported = TRUE;
|
|
}
|
|
else
|
|
{
|
|
TraceTag(ttidBenchmark, "High performance counter is not supported.");
|
|
m_fSupported = FALSE;
|
|
}
|
|
}
|
|
|
|
CBenchmark::~CBenchmark()
|
|
{
|
|
delete [] m_sznDescription;
|
|
}
|
|
|
|
|
|
void
|
|
CBenchmark::Start(PCSTR sznDescription)
|
|
{
|
|
// If QueryPerformanceCounter is supported
|
|
if (m_fSupported)
|
|
{
|
|
// delete the old description
|
|
delete [] m_sznDescription;
|
|
|
|
// replace with new one if specified
|
|
if (sznDescription)
|
|
{
|
|
m_sznDescription = new CHAR[strlen(sznDescription) + 1];
|
|
if (m_sznDescription)
|
|
{
|
|
strcpy(m_sznDescription, sznDescription);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// no description specified clear the member variable
|
|
m_sznDescription = NULL;
|
|
}
|
|
m_fStarted = TRUE;
|
|
m_i64TotalTime = 0;
|
|
|
|
// Record our start time
|
|
QueryPerformanceCounter(reinterpret_cast<LARGE_INTEGER*>
|
|
(&m_i64StartTime));
|
|
}
|
|
}
|
|
|
|
void
|
|
CBenchmark::Stop()
|
|
{
|
|
__int64 i64Stop;
|
|
// Record our stop time
|
|
QueryPerformanceCounter(reinterpret_cast<LARGE_INTEGER*>(&i64Stop));
|
|
|
|
// If start was called prior to stop, then record the total time and
|
|
// reset our m_fStarted flag
|
|
//
|
|
if (m_fStarted)
|
|
{
|
|
m_fStarted = FALSE;
|
|
m_i64TotalTime = i64Stop - m_i64StartTime;
|
|
}
|
|
else
|
|
{
|
|
// invalidate previous benchmark since stop was called before start
|
|
m_i64TotalTime = 0;
|
|
}
|
|
}
|
|
|
|
PCSTR
|
|
CBenchmark::SznBenchmarkSeconds(unsigned short usPrecision)
|
|
{
|
|
CHAR sznFmt[10];
|
|
sprintf(sznFmt, "%%.%df", usPrecision);
|
|
sprintf(m_sznSeconds, sznFmt, DblBenchmarkSeconds());
|
|
return m_sznSeconds;
|
|
}
|