/*-
 * Copyright (c) 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)times.c	8.1 (Berkeley) 06/04/93";
#endif /* LIBC_SCCS and not lint */

#include <sys/param.h>
#include <sys/time.h>
#include <sys/times.h>
#include <sys/resource.h>

/*
 * Convert usec to clock ticks; could do (usec * CLK_TCK) / 1000000,
 * but this would overflow if we switch to nanosec.
 */
#define	CONVTCK(r)	(r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK))

clock_t
times(tp)
	register struct tms *tp;
{
	struct rusage ru;
	struct timeval t;

	if (getrusage(RUSAGE_SELF, &ru) < 0)
		return ((clock_t)-1);
	tp->tms_utime = CONVTCK(ru.ru_utime);
	tp->tms_stime = CONVTCK(ru.ru_stime);
	if (getrusage(RUSAGE_CHILDREN, &ru) < 0)
		return ((clock_t)-1);
	tp->tms_cutime = CONVTCK(ru.ru_utime);
	tp->tms_cstime = CONVTCK(ru.ru_stime);
	if (gettimeofday(&t, (struct timezone *)0))
		return ((clock_t)-1);
	return ((clock_t)(CONVTCK(t)));
}