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44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
/* Copyright (C) 1991, 1997, 1998, 1999 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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sys/resource.h>
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#include <sys/time.h>
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#include <time.h>
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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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timeval_to_clock_t (const struct timeval *tv)
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{
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return (clock_t) ((tv->tv_sec * CLOCKS_PER_SEC) +
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(tv->tv_usec * CLOCKS_PER_SEC / 1000000));
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}
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/* Return the time used by the program so far (user time + system time). */
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clock_t
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clock (void)
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{
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struct rusage usage;
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if (__getrusage (RUSAGE_SELF, &usage) < 0)
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return (clock_t) -1;
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return (timeval_to_clock_t (&usage.ru_stime) +
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timeval_to_clock_t (&usage.ru_utime));
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}
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