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/* $Id: clock_gettime.c,v 1.2 1998/12/29 18:31:18 dm Exp $ */
/*
*
* Copyright (C) 1998 David Mazieres (dm@uun.org)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
*/
#include "sysconf.h"
#ifndef HAVE_CLOCK_GETTIME
#include <sys/resource.h>
int
clock_gettime (int id, struct timespec *tp)
{
struct timeval tv;
struct rusage ru;
switch (id) {
case CLOCK_REALTIME:
if (gettimeofday (&tv, NULL) < 0)
return -1;
tp->tv_sec = tv.tv_sec;
tp->tv_nsec = tv.tv_usec * 1000;
return 0;
case CLOCK_VIRTUAL:
if (getrusage (RUSAGE_SELF, &ru) < 0)
return -1;
tp->tv_sec = ru.ru_utime.tv_sec;
tp->tv_nsec = ru.ru_utime.tv_usec * 1000;
return 0;
case CLOCK_PROF:
if (getrusage (RUSAGE_SELF, &ru) < 0)
return -1;
tp->tv_sec = (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec);
tp->tv_nsec = (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) * 1000;
while (tp->tv_nsec > 1000000000) {
tp->tv_sec++;
tp->tv_nsec -= 1000000000;
}
return 0;
default:
errno = EINVAL;
return -1;
}
}
#endif /* !HAVE_CLOCK_GETTIME */
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