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/* Copyright (C) 1991-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <sys/resource.h>
#include <sys/time.h>
#include <time.h>
#ifdef __GNUC__
__inline
#endif
static clock_t
timeval_to_clock_t (const struct timeval *tv)
{
return (clock_t) ((tv->tv_sec * CLOCKS_PER_SEC) +
(tv->tv_usec * CLOCKS_PER_SEC / 1000000));
}
/* Return the time used by the program so far (user time + system time). */
clock_t
clock (void)
{
struct rusage usage;
if (__getrusage (RUSAGE_SELF, &usage) < 0)
return (clock_t) -1;
return (timeval_to_clock_t (&usage.ru_stime) +
timeval_to_clock_t (&usage.ru_utime));
}
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