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/* $OpenBSD: times.c,v 1.7 2015/11/02 17:02:37 mmcc 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/time.h> |
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#include <sys/times.h> |
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#include <sys/resource.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) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) |
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clock_t |
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times(struct tms *tp) |
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{ |
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struct rusage ru; |
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struct timeval t; |
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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, NULL)) |
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return ((clock_t)-1); |
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return ((clock_t)(CONVTCK(t))); |
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} |