130 lines
2.9 KiB
C++
130 lines
2.9 KiB
C++
#ifndef STOPWATCH_H
|
|
#define STOPWATCH_H
|
|
|
|
#include <sys/time.h>
|
|
#include <cstdlib>
|
|
#include <cmath>
|
|
|
|
/**
|
|
\brief timing utility
|
|
This class can take times, up to microseconds exact
|
|
*/
|
|
|
|
class stopwatch {
|
|
/**
|
|
time at last start call
|
|
*/
|
|
timeval starttime;
|
|
|
|
/**
|
|
time at last stop call
|
|
*/
|
|
timeval stoptime;
|
|
|
|
/**
|
|
to accumulate time intervals, previous interval seconds are saved
|
|
*/
|
|
long int offset_sec;
|
|
/**
|
|
to accumulate time intervals, previous interval microseconds are saved
|
|
*/
|
|
long int offset_usec;
|
|
|
|
/**
|
|
shift elapsed time to offset register and save new start time
|
|
*/
|
|
void elapsed_save() const {
|
|
/* if timer is already stoped, do nothing */
|
|
if (timerisset(&starttime)) {
|
|
stopwatch* noconst_this=(stopwatch*)this;
|
|
gettimeofday(&(noconst_this->stoptime),NULL);
|
|
/* elapsed time added to internal pointer */
|
|
noconst_this->offset_sec+=(stoptime.tv_sec-starttime.tv_sec);
|
|
noconst_this->offset_usec+=(stoptime.tv_usec-starttime.tv_usec);
|
|
noconst_this->starttime.tv_sec=stoptime.tv_sec;
|
|
noconst_this->starttime.tv_usec=stoptime.tv_usec;
|
|
while (offset_usec<0) {
|
|
noconst_this->offset_usec+=1000000;
|
|
noconst_this->offset_sec-=1;
|
|
}
|
|
while (offset_usec>=1000000) {
|
|
noconst_this->offset_usec-=1000000;
|
|
noconst_this->offset_sec+=1;
|
|
}
|
|
}
|
|
}
|
|
|
|
public:
|
|
|
|
/**
|
|
creates stopwatch, stopped state, 0 time offset
|
|
*/
|
|
stopwatch() {
|
|
timerclear(&starttime);
|
|
offset_sec=offset_usec=0;
|
|
}
|
|
|
|
/**
|
|
creates stopwatch, stopped state, with time offset from double argument
|
|
*/
|
|
stopwatch(const double& offset) {
|
|
timerclear(&starttime);
|
|
offset_sec=(long int)floor(offset);
|
|
offset_usec=(long int)(1.0e6*(offset-offset_sec));
|
|
}
|
|
|
|
/**
|
|
creates stopwatch, stopped state, with time offset in seconds and microseconds
|
|
*/
|
|
stopwatch(const long int& _offset_sec, const long int& _offset_usec) {
|
|
timerclear(&starttime);
|
|
offset_sec=_offset_sec;
|
|
offset_usec=_offset_usec;
|
|
}
|
|
|
|
stopwatch(const stopwatch& orig) {
|
|
starttime.tv_sec=orig.starttime.tv_sec;
|
|
starttime.tv_usec=orig.starttime.tv_usec;
|
|
offset_sec=orig.offset_sec;
|
|
offset_usec=orig.offset_usec;
|
|
}
|
|
|
|
/**
|
|
set timer to zero and start measurement
|
|
*/
|
|
inline void start() {
|
|
gettimeofday(&starttime,NULL);
|
|
offset_sec=offset_usec=0;
|
|
}
|
|
|
|
/**
|
|
stop or pause time measurement
|
|
*/
|
|
inline void stop() {
|
|
elapsed_save();
|
|
/* and clear this pointer */
|
|
timerclear(&starttime);
|
|
}
|
|
|
|
/**
|
|
continue time measurement
|
|
*/
|
|
inline void cont() {
|
|
if (!timerisset(&starttime)) gettimeofday(&starttime,NULL);
|
|
}
|
|
|
|
inline double elapsed() const {
|
|
elapsed_save();
|
|
return (1.0e-6*(double)offset_usec)+(double)offset_sec;
|
|
}
|
|
|
|
inline void elapsed(long int& sec, long int& usec) const {
|
|
elapsed_save();
|
|
sec=offset_sec;
|
|
usec=offset_usec;
|
|
}
|
|
|
|
};
|
|
|
|
#endif /* STOPWATCH_H */
|