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/* **************************************************************************
timer.cpp timer for C/C++ programs
20-Jun-2006 PMC gettimeofday() not available on MingW,
changed this to pure elapsed time only,
to accomodate MingW and timing problems
on Windoze
Copyright 2003-2006 P.M.Cronje
This file is part of the Double Dummer Driver (DDD).
DDD is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
DDD is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with DDD; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
************************************************************************** */
#include <stdlib.h>
#include <stdio.h>
#include <sys/time.h>
#include <string.h>
#include <ctype.h>
#include <time.h>
#include "timer.h"
// *****************************************************************************
// timer workaround for Windoze,
// must define _WIN32 for compilation
// *****************************************************************************
#if defined(_WIN32)
typedef struct sFileTime
{
unsigned int dwLowDateTime;
unsigned int dwHighDateTime;
};
extern "C"
{
void _stdcall GetSystemTimeAsFileTime(struct sFileTime *pft);
}
void gettimeofday(struct timeval* p, void* pv);
void gettimeofday(struct timeval* p, void* pv)
{
union
{
long long ns100; // time since 1 Jan 1601 in 100ns units
struct sFileTime ft;
} now;
GetSystemTimeAsFileTime(&(now.ft));
p->tv_usec = (int)((now.ns100 / 10LL) % 1000000LL);
p->tv_sec = (int)((now.ns100 - (116444736000000000LL))/10000000LL);
}
#endif
// *****************************************************************************
// cTimer
// *****************************************************************************
cTimer::cTimer()
{
bStarted = false;
dElapsed = prevdElapsed = deltaElapsed = 0.0;
} // cTimer::cTimer
// *****************************************************************************
cTimer::~cTimer()
{
stop();
} // cTimer::~cTimer
// *****************************************************************************
void cTimer::check()
{
// find elapsed statistics
if(bStarted)
{
getTimerInfo(&dElapsed);
deltaElapsed = dElapsed - prevdElapsed;
prevdElapsed = dElapsed;
dElapsed -= dElapsed0;
}
else
start();
} // cTimer::check
// *****************************************************************************
void cTimer::getFormattedTime(char sztime[32])
{
// DD-MON-YYYY HH:MM:SS
time_t timeval;
struct tm *ptm;
// find the current date and time
time(&timeval);
ptm = localtime(&timeval);
strftime(sztime,21,"%d-%b-%Y %H:%M:%S",ptm);
} // cTimer::getFormattedTime
// *****************************************************************************
void cTimer::getTimerInfo(double *pdelapsed)
{
struct timeval tv;
// elapsed
gettimeofday(&tv,0);
*pdelapsed = (double)tv.tv_sec + 0.000001 * (double)tv.tv_usec;
if(*pdelapsed < 0.000001)
*pdelapsed = 0.000001;
} // cTimer::getTimerInfo
// *****************************************************************************
void cTimer::start()
{
getTimerInfo(&dElapsed0);
dElapsed = dElapsed0;
prevdElapsed = dElapsed;
deltaElapsed = 0.0;
bStarted = true;
} // cTimer::start
// *****************************************************************************
void cTimer::stop()
{
if(bStarted)
{
check();
bStarted = false;
}
} // cTimer::stop
// *****************************************************************************
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