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69 lines
2.1 KiB
C
69 lines
2.1 KiB
C
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/* Copyright (C) 1991, 1992, 1993, 1995 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <errno.h>
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#include <stddef.h>
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#include <sys/times.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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/* Time the program started. */
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extern time_t _posix_start_time;
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#ifdef __GNUC__
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__inline
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#endif
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static clock_t
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DEFUN(timeval_to_clock_t, (tv), CONST struct timeval *tv)
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{
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return (clock_t) ((tv->tv_sec * CLK_TCK) +
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(tv->tv_usec * CLK_TCK / 1000000L));
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}
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/* Store the CPU time used by this process and all its
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dead children (and their dead children) in BUFFER.
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Return the elapsed real time, or (clock_t) -1 for errors.
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All times are in CLK_TCKths of a second. */
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clock_t
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DEFUN(__times, (buffer), struct tms *buffer)
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{
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struct rusage usage;
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if (buffer == NULL)
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{
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errno = EINVAL;
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return (clock_t) -1;
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}
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if (__getrusage(RUSAGE_SELF, &usage) < 0)
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return (clock_t) -1;
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buffer->tms_utime = (clock_t) timeval_to_clock_t(&usage.ru_utime);
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buffer->tms_stime = (clock_t) timeval_to_clock_t(&usage.ru_stime);
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if (__getrusage(RUSAGE_CHILDREN, &usage) < 0)
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return (clock_t) -1;
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buffer->tms_cutime = (clock_t) timeval_to_clock_t(&usage.ru_utime);
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buffer->tms_cstime = (clock_t) timeval_to_clock_t(&usage.ru_stime);
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return (time((time_t *) NULL) - _posix_start_time) * CLK_TCK;
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}
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weak_alias (__times, times)
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