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/* This file is part of the FaCT++ DL reasoner
Copyright (C) 2003-2015 Dmitry Tsarkov and The University of Manchester
Copyright (C) 2015-2016 Dmitry Tsarkov
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef PROCTIMER_H
#define PROCTIMER_H
#include <time.h>
/**
* Class TsProcTimer definition & implementation
*
* Useful for calculating processor time intervals up to 10^-3 sec
*
*/
class TsProcTimer
{
private: // members
/// save the starting time of the timer
clock_t startTime;
/// calculated time between Start() and Stop() calls
float resultTime;
/// flag to show timer is started
bool Started;
private: // methods
/// get time interval between startTime and current time
float calcDelta ( void ) const;
public: // interface
/// the only c'tor
TsProcTimer ( void ) : startTime(0), resultTime(0.0), Started(false) {}
/// empty d'tor
~TsProcTimer ( void ) {}
/// reset timer
void Reset ( void );
/// record current time
void Start ( void );
/// save time interval from starting point to current moment
void Stop ( void );
/// get time interval
operator float ( void ) const;
}; // TsProcTimer
/**
* TsTimer implementation
*/
inline void TsProcTimer :: Reset ( void )
{
Started = false;
resultTime = 0;
}
inline float TsProcTimer :: calcDelta ( void ) const
{
clock_t finishTime = clock();
// calculate difference between cuttent time and start time
float realProcTime = float(finishTime>=startTime ?
finishTime-startTime :
((clock_t)-1)-startTime+finishTime ) / CLOCKS_PER_SEC;
// correct times less than a millisecond
if ( realProcTime < 1e-3 )
realProcTime = 0;
return realProcTime;
}
inline TsProcTimer :: operator float ( void ) const
{
const unsigned int norm = 100; // normalisation constant
float realProcTime;
if ( Started )
realProcTime = calcDelta();
else
realProcTime = resultTime;
// normalise value up to CONST
return ((unsigned long)(realProcTime*norm))/(float)norm;
}
inline void TsProcTimer :: Start ( void )
{
if ( !Started )
{
startTime = clock();
Started = true;
}
}
inline void TsProcTimer :: Stop ( void )
{
if ( Started )
{
Started = false;
resultTime += calcDelta ();
}
}
#endif
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