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/*
SABRE Fighter Plane Simulator
Copyright (c) 1997 Dan Hammer
Portions Donated By Antti Barck
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 1, or (at your option)
any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include "mytimer.h"
/*
* 08/31/87 Antti Barck
* Portable timing using gettimeofday
*/
MTimer::MTimer()
{
#ifdef PORTABLE_TIMING
gettimeofday( &t1, &dontcare );
#endif
#ifdef CLOCK_TIMING
t1 = clock();
#endif
}
float MTimer::get_time()
{
float d;
#ifdef PORTABLE_TIMING
gettimeofday( &t2, &dontcare );
d = (float)((t2.tv_sec-t1.tv_sec)+(t2.tv_usec-t1.tv_usec)*0.000001);
gettimeofday( &t1, &dontcare );
return d;
#endif
#ifdef CLOCK_TIMING
t2 = clock();
d = (float) (t2 - t1);
t1 = clock();
return (d / ((float)CLOCKS_PER_SEC));
#endif
}
int MTimer::check_time()
{
#ifdef PORTABLE_TIMING
gettimeofday( &t2, &dontcare );
/* rough figures but only checking here */
return (((t2.tv_sec<<20)+t2.tv_usec) > ((t1.tv_sec<<20)+t1.tv_usec));
/* must optimize this ! */
#endif
#ifdef CLOCK_TIMING
t2 = clock();
return (t2 > t1);
#endif
}
#if TEST_MYTIMER
int main()
{
MTimer timer;
/* sleep for three seconds */
sleep( 3 );
printf("timer: %5.2f\n", timer.get_time());
/* sleep for 3/10 seconds */
usleep( 300000 );
printf("timer: %5.2f\n", timer.get_time());
/* be busy (time depends on platfrom, ~3/100 on Alpha 21066) */
for( double i=0; i<100.0; i+=0.0003 )
;
printf("timer: %5.2f\n", timer.get_time());
return 0;
}
#endif
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