/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*
* @(#)dtime_.c 5.1 6/7/85
*/
/*
* Returns the delta time since the last call to dtime.
*
* calling sequence:
* real time(2)
* call dtime(time)
* where:
* the 2 element array time will receive the user and system
* elapsed time since the last call to dtime, or since the start
* of execution.
*
* This routine can be called as function, and returns the sum of
* user and system times. The time_array argument must always be given.
*
* The resolution for all timing is 1/60 second.
*/
#include <sys/types.h>
#include <sys/times.h>
struct tb { float usrtime; float systime; };
time_t dutime=0, dstime=0;
float
dtime_(dt) struct tb *dt;
{ struct tms clock;
times(&clock);
dt->usrtime = (float)(clock.tms_utime - dutime) / 60.0;
dt->systime = (float)(clock.tms_stime - dstime) / 60.0;
dutime = clock.tms_utime;
dstime = clock.tms_stime;
return(dt->usrtime + dt->systime);
}