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/** @file
* Copyright (c) 1995 by PDCL Corporation. All Rights Reserved
* NAME
* timing.c
* PURPOSE
* Timing routines for calculating the execution time:
* void start_timer(void); Set the timer.
* double elapsed_time(void); Return the timing elapsed since
* the timer has been set.
* NOTES
* Jialin Ju - Oct 16, 1995 Created.
*/
#include <stdio.h>
#include <stdlib.h>
//#include <sys/types.h>
//#include <sys/errno.h>
#include <sys/time.h>
/* Timing routines that use standard Unix gettingofday() */
static struct timeval start_time;
static struct timeval finish_time;
/* Start measuring a time delay */
void start_timer(void)
{
gettimeofday( &start_time, NULL);
}
/* Retunrn elapsed time in milliseconds */
double elapsed_time(void)
{
gettimeofday( &finish_time, NULL);
return(1000.0*(finish_time.tv_sec - start_time.tv_sec) +
(finish_time.tv_usec - start_time.tv_usec)/1000.0 );
}
/* Return the stopping time in milliseconds */
double stop_time(void)
{
gettimeofday( &finish_time, NULL);
return(1000.0*finish_time.tv_sec + finish_time.tv_usec/1000.0);
}
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