mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 13:30:06 +00:00
72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
/* Copyright (C) 1991,92,93,95,96,97,1998,2001 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)
|