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cvd_timer.cc
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cvd_timer.cc
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///////////////////////////////////////////////////////
//
// A timer class designed for dealing with timestamps
// CK Nov 2002
//
///////////////////////////////////////////////////////
#include "cvd/timer.h"
#include <iostream>
#if defined(WIN32) && !defined(__MINGW32__)
#include "Win32/win32.h"
#else
#include <sys/time.h> //gettimeofday
#endif
namespace CVD {
cvd_timer::cvd_timer()
{
startTimeInNanoSeconds = get_time_of_day_ns();
}
cvd_timer::cvd_timer(double t)
{
reset(t);
}
double cvd_timer::reset()
{
long long temp = get_time_of_day_ns();
double elapsed = (temp - startTimeInNanoSeconds) / 1e9;
startTimeInNanoSeconds = temp;
return elapsed;
}
double cvd_timer::get_time()
{
return (get_time_of_day_ns()-startTimeInNanoSeconds)/1e9;
}
// Conv from units of nanosecs (specifically for v4l2 : kernel 2.4
double cvd_timer::conv_ntime(signed long long time)
{
return (time-startTimeInNanoSeconds)/1e9;
}
// Conv from units of nanosecs (specifically for v4l2 : kernel 2.6
// Let the overloading mecnanism sort out the difference in the
// headers from 2.4 hee, hee, hee
double cvd_timer::conv_ntime(const struct timeval& tv)
{
double time = tv.tv_sec + tv.tv_usec*1e-6;
return time-startTimeInNanoSeconds / 1e9;
}
double get_time_of_day()
{
return get_time_of_day_ns()/1e9;
}
void cvd_timer::reset(const double t)
{
startTimeInNanoSeconds = (long long)(t * 1e9);
}
void cvd_timer::reset_ns(long long t)
{
startTimeInNanoSeconds = t;
}
cvd_timer timer;
}