11573Srgrimes/*
21573Srgrimes * Copyright (c) 1989, 1993
31573Srgrimes *	The Regents of the University of California.  All rights reserved.
41573Srgrimes *
51573Srgrimes * Redistribution and use in source and binary forms, with or without
61573Srgrimes * modification, are permitted provided that the following conditions
71573Srgrimes * are met:
81573Srgrimes * 1. Redistributions of source code must retain the above copyright
91573Srgrimes *    notice, this list of conditions and the following disclaimer.
101573Srgrimes * 2. Redistributions in binary form must reproduce the above copyright
111573Srgrimes *    notice, this list of conditions and the following disclaimer in the
121573Srgrimes *    documentation and/or other materials provided with the distribution.
131573Srgrimes * 4. Neither the name of the University nor the names of its contributors
141573Srgrimes *    may be used to endorse or promote products derived from this software
151573Srgrimes *    without specific prior written permission.
161573Srgrimes *
171573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
181573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
191573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
201573Srgrimes * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
211573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
221573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
231573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
241573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
251573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
261573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
271573Srgrimes * SUCH DAMAGE.
281573Srgrimes */
291573Srgrimes
301573Srgrimes#if defined(LIBC_SCCS) && !defined(lint)
311573Srgrimesstatic char sccsid[] = "@(#)clock.c	8.1 (Berkeley) 6/4/93";
321573Srgrimes#endif /* LIBC_SCCS and not lint */
3392986Sobrien#include <sys/cdefs.h>
3492986Sobrien__FBSDID("$FreeBSD$");
351573Srgrimes
361573Srgrimes#include <sys/param.h>
371573Srgrimes#include <sys/time.h>
381573Srgrimes#include <sys/resource.h>
391573Srgrimes
401573Srgrimes/*
416167Sbde * Convert usec to clock ticks; could do (usec * CLOCKS_PER_SEC) / 1000000,
421573Srgrimes * but this would overflow if we switch to nanosec.
431573Srgrimes */
446167Sbde#define	CONVTCK(r)	((r).tv_sec * CLOCKS_PER_SEC \
456167Sbde			 + (r).tv_usec / (1000000 / CLOCKS_PER_SEC))
461573Srgrimes
471573Srgrimesclock_t
481573Srgrimesclock()
491573Srgrimes{
501573Srgrimes	struct rusage ru;
511573Srgrimes
521573Srgrimes	if (getrusage(RUSAGE_SELF, &ru))
531573Srgrimes		return ((clock_t) -1);
541573Srgrimes	return((clock_t)((CONVTCK(ru.ru_utime) + CONVTCK(ru.ru_stime))));
551573Srgrimes}
56