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/* Return CPU and real time used by process and its children. Hurd version.
Copyright (C) 2001-2014 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>
#include <mach.h>
#include <mach/task_info.h>
#include <hurd.h>
static inline clock_t
clock_from_time_value (const time_value_t *t)
{
return t->seconds * 1000000 + t->microseconds;
}
/* 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 (struct tms *tms)
{
struct task_basic_info bi;
struct task_thread_times_info tti;
mach_msg_type_number_t count;
union { time_value_t tvt; struct timeval tv; } now;
error_t err;
count = TASK_BASIC_INFO_COUNT;
err = __task_info (__mach_task_self (), TASK_BASIC_INFO,
(task_info_t) &bi, &count);
if (err)
return __hurd_fail (err);
count = TASK_THREAD_TIMES_INFO_COUNT;
err = __task_info (__mach_task_self (), TASK_THREAD_TIMES_INFO,
(task_info_t) &tti, &count);
if (err)
return __hurd_fail (err);
tms->tms_utime = (clock_from_time_value (&bi.user_time)
+ clock_from_time_value (&tti.user_time));
tms->tms_stime = (clock_from_time_value (&bi.system_time)
+ clock_from_time_value (&tti.system_time));
/* XXX This can't be implemented until getrusage(RUSAGE_CHILDREN) can be. */
tms->tms_cutime = tms->tms_cstime = 0;
if (__gettimeofday (&now.tv, NULL) < 0)
return -1;
return (clock_from_time_value (&now.tvt)
- clock_from_time_value (&bi.creation_time));
}
weak_alias (__times, times)
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