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//
// Copyright (c) 1994, 1995, 2006 by Mike Romberg ( mike.romberg@noaa.gov )
//
// This file may be distributed under terms of the GPL
//
#ifndef _TIMER_H_
#define _TIMER_H_
//
// General purpose interval timer class
//
// Implemented using BSD derived function gettimeofday for greater resolution
//
// Author : Mike Romberg
#include "timeval.h"
class Timer {
public:
Timer( int start = 0 ) { if ( start ) Timer::start(); }
~Timer( void ){}
void start( void ) { gettimeofday( &starttime_, NULL ); }
void stop( void ) { gettimeofday( &stoptime_, NULL ); }
// This one uses doubles as the return value, to avoid
// overflow/sign problems.
double report_usecs(void) const {
return (stoptime_.tv_sec - starttime_.tv_sec) * 1000000.0
+ stoptime_.tv_usec - starttime_.tv_usec;
}
std::ostream &printOn(std::ostream &os) const {
return os <<"Timer : ["
<<"starttime_ = " <<TimeVal(starttime_)
<<", stoptime_ = " <<TimeVal(stoptime_)
<<", duration = " <<report_usecs() <<" usecs]";
}
protected:
struct timeval starttime_, stoptime_;
private:
};
inline std::ostream &operator<<(std::ostream &os, const Timer &t){
return t.printOn(os);
}
#endif
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