93 lines
3.1 KiB
C
93 lines
3.1 KiB
C
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/* $NetBSD: times.c,v 1.15 2009/01/11 02:46:27 christos Exp $ */
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/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)times.c 8.1 (Berkeley) 6/4/93";
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#else
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__RCSID("$NetBSD: times.c,v 1.15 2009/01/11 02:46:27 christos Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/times.h>
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#include <sys/resource.h>
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#include <assert.h>
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#include <errno.h>
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#include <time.h>
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/*
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* Convert usec to clock ticks; could do (usec * CLK_TCK) / 1000000,
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* but this would overflow if we switch to nanosec.
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*/
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#define CONVTCK(r) \
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(clock_t)(r.tv_sec * clk_tck + r.tv_usec / (1000000 / (uint)clk_tck))
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#ifndef __times_rusage
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#define __times_rusage struct rusage
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#endif
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#ifndef __times_timeval
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#define __times_timeval struct timeval
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#endif
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clock_t
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times(struct tms *tp)
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{
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__times_rusage ru;
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__times_timeval t;
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static clock_t clk_tck;
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_DIAGASSERT(tp != NULL);
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/*
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* we use a local copy of CLK_TCK because it expands to a
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* moderately expensive function call.
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*/
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if (clk_tck == 0)
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clk_tck = (clock_t)CLK_TCK;
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if (getrusage(RUSAGE_SELF, &ru) < 0)
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return ((clock_t)-1);
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tp->tms_utime = CONVTCK(ru.ru_utime);
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tp->tms_stime = CONVTCK(ru.ru_stime);
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if (getrusage(RUSAGE_CHILDREN, &ru) < 0)
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return ((clock_t)-1);
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tp->tms_cutime = CONVTCK(ru.ru_utime);
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tp->tms_cstime = CONVTCK(ru.ru_stime);
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if (gettimeofday(&t, (struct timezone *)0))
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return ((clock_t)-1);
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return ((clock_t)(CONVTCK(t)));
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}
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