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/**
* $Id$
*/
/*
*
* Template Numerical Toolkit (TNT): Linear Algebra Module
*
* Mathematical and Computational Sciences Division
* National Institute of Technology,
* Gaithersburg, MD USA
*
*
* This software was developed at the National Institute of Standards and
* Technology (NIST) by employees of the Federal Government in the course
* of their official duties. Pursuant to title 17 Section 105 of the
* United States Code, this software is not subject to copyright protection
* and is in the public domain. The Template Numerical Toolkit (TNT) is
* an experimental system. NIST assumes no responsibility whatsoever for
* its use by other parties, and makes no guarantees, expressed or implied,
* about its quality, reliability, or any other characteristic.
*
* BETA VERSION INCOMPLETE AND SUBJECT TO CHANGE
* see http://math.nist.gov/tnt for latest updates.
*
*/
#ifndef STPWATCH_H
#define STPWATCH_H
// for clock() and CLOCKS_PER_SEC
#include <ctime>
namespace TNT
{
/* Simple stopwatch object:
void start() : start timing
double stop() : stop timing
void reset() : set elapsed time to 0.0
double read() : read elapsed time (in seconds)
*/
inline double seconds(void)
{
static const double secs_per_tick = 1.0 / CLOCKS_PER_SEC;
return ( (double) clock() ) * secs_per_tick;
}
class stopwatch {
private:
int running;
double last_time;
double total;
public:
stopwatch() : running(0), last_time(0.0), total(0.0) {}
void reset() { running = 0; last_time = 0.0; total=0.0; }
void start() { if (!running) { last_time = seconds(); running = 1;}}
double stop() { if (running)
{
total += seconds() - last_time;
running = 0;
}
return total;
}
double read() { if (running)
{
total+= seconds() - last_time;
last_time = seconds();
}
return total;
}
};
} // namespace TNT
#endif
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