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75 lines
2.4 KiB
C
75 lines
2.4 KiB
C
/* Return CPU and real time used by process and its children. Hurd version.
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Copyright (C) 2001-2018 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 <errno.h>
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#include <stddef.h>
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#include <sys/resource.h>
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#include <sys/times.h>
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#include <sys/time.h>
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#include <time.h>
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#include <mach.h>
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#include <mach/task_info.h>
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#include <hurd.h>
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static inline clock_t
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clock_from_time_value (const time_value_t *t)
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{
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return t->seconds * 1000000 + t->microseconds;
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}
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/* Store the CPU time used by this process and all its
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dead children (and their dead children) in BUFFER.
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Return the elapsed real time, or (clock_t) -1 for errors.
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All times are in CLK_TCKths of a second. */
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clock_t
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__times (struct tms *tms)
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{
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struct task_basic_info bi;
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struct task_thread_times_info tti;
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mach_msg_type_number_t count;
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union { time_value_t tvt; struct timeval tv; } now;
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error_t err;
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count = TASK_BASIC_INFO_COUNT;
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err = __task_info (__mach_task_self (), TASK_BASIC_INFO,
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(task_info_t) &bi, &count);
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if (err)
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return __hurd_fail (err);
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count = TASK_THREAD_TIMES_INFO_COUNT;
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err = __task_info (__mach_task_self (), TASK_THREAD_TIMES_INFO,
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(task_info_t) &tti, &count);
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if (err)
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return __hurd_fail (err);
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tms->tms_utime = (clock_from_time_value (&bi.user_time)
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+ clock_from_time_value (&tti.user_time));
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tms->tms_stime = (clock_from_time_value (&bi.system_time)
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+ clock_from_time_value (&tti.system_time));
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/* XXX This can't be implemented until getrusage(RUSAGE_CHILDREN) can be. */
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tms->tms_cutime = tms->tms_cstime = 0;
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if (__gettimeofday (&now.tv, NULL) < 0)
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return -1;
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return (clock_from_time_value (&now.tvt)
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- clock_from_time_value (&bi.creation_time));
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}
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weak_alias (__times, times)
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