tw-timing.c

Go to the documentation of this file.

#include "tw-timing.h"
#include "ross-extern.h"
#include <string.h>
#include <sys/time.h>
 
void
tw_wall_now(tw_wtime * t)
{
        if(0 != gettimeofday((struct timeval *)t, NULL))
                tw_error(TW_LOC, "Unable to get time of day!");
}
 
void
tw_wall_sub(tw_wtime * r, tw_wtime * a, tw_wtime * b)
{
        r->tv_sec = a->tv_sec - b->tv_sec;
        r->tv_usec = a->tv_usec - b->tv_usec;
 
        if (r->tv_usec < 0)
        {
                r->tv_sec--;
                r->tv_usec += 1000000;
        }
}
 
double
tw_wall_to_double(tw_wtime * t)
{
        return (double)t->tv_sec + (((double)t->tv_usec) / 1000000);
}