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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 <errno.h>
#include <stddef.h>
#include <sys/resource.h>
#include <sys/times.h>
#include <sys/time.h>
#include <time.h>
/* Time the program started. */
extern time_t _posix_start_time;
#ifdef __GNUC__
__inline
#endif
static clock_t
timeval_to_clock_t (const struct timeval *tv, clock_t clk_tck)
{
return (clock_t) ((tv->tv_sec * clk_tck) +
(tv->tv_usec * clk_tck / 1000000L));
}
/* Store the CPU time used by this process and all its
dead children (and their dead children) in BUFFER.
Return the elapsed real time, or (clock_t) -1 for errors.
All times are in CLK_TCKths of a second. */
clock_t
__times (buffer)
struct tms *buffer;
{
struct rusage usage;
clock_t clk_tck;
if (buffer == NULL)
{
__set_errno (EINVAL);
return (clock_t) -1;
}
clk_tck = __getclktck ();
if (__getrusage (RUSAGE_SELF, &usage) < 0)
return (clock_t) -1;
buffer->tms_utime = (clock_t) timeval_to_clock_t (&usage.ru_utime, clk_tck);
buffer->tms_stime = (clock_t) timeval_to_clock_t (&usage.ru_stime, clk_tck);
if (__getrusage (RUSAGE_CHILDREN, &usage) < 0)
return (clock_t) -1;
buffer->tms_cutime = (clock_t) timeval_to_clock_t (&usage.ru_utime, clk_tck);
buffer->tms_cstime = (clock_t) timeval_to_clock_t (&usage.ru_stime, clk_tck);
return (time ((time_t *) NULL) - _posix_start_time) * clk_tck;
}
weak_alias (__times, times)
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