sysdeps/mach/hurd/times.c

   1 /* Return CPU and real time used by process and its children.  Hurd version.
   2    Copyright (C) 2001,02 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <errno.h>
  21 #include <stddef.h>
  22 #include <sys/resource.h>
  23 #include <sys/times.h>
  24 #include <sys/time.h>
  25 #include <time.h>
  26 #include <mach.h>
  27 #include <mach/task_info.h>
  28 #include <hurd.h>
  29
  30 static inline clock_t
  31 clock_from_time_value (const time_value_t *t)
  32 {
  33   return t->seconds * 1000000 + t->microseconds;
  34 }
  35
  36 #if NO_CREATION_TIME
  37 static time_value_t startup_time;
  38 static void times_init (void) __attribute__ ((unused));
  39 static void
  40 times_init (void)
  41 {
  42   __gettimeofday ((struct timeval *) &startup_time, NULL);
  43 }
  44 text_set_element (__libc_subinit, times_init);
  45 #endif
  46
  47 /* Store the CPU time used by this process and all its
  48    dead children (and their dead children) in BUFFER.
  49    Return the elapsed real time, or (clock_t) -1 for errors.
  50    All times are in CLK_TCKths of a second.  */
  51 clock_t
  52 __times (struct tms *tms)
  53 {
  54   struct task_basic_info bi;
  55   struct task_thread_times_info tti;
  56   mach_msg_type_number_t count;
  57   time_value_t now;
  58   error_t err;
  59
  60   count = TASK_BASIC_INFO_COUNT;
  61   err = __task_info (__mach_task_self (), TASK_BASIC_INFO,
  62                      (task_info_t) &bi, &count);
  63   if (err)
  64     return __hurd_fail (err);
  65
  66   count = TASK_THREAD_TIMES_INFO_COUNT;
  67   err = __task_info (__mach_task_self (), TASK_THREAD_TIMES_INFO,
  68                      (task_info_t) &tti, &count);
  69   if (err)
  70     return __hurd_fail (err);
  71
  72   tms->tms_utime = (clock_from_time_value (&bi.user_time)
  73                     + clock_from_time_value (&tti.user_time));
  74   tms->tms_stime = (clock_from_time_value (&bi.system_time)
  75                     + clock_from_time_value (&tti.system_time));
  76
  77   /* XXX This can't be implemented until getrusage(RUSAGE_CHILDREN) can be.  */
  78   tms->tms_cutime = tms->tms_cstime = 0;
  79
  80   if (__gettimeofday ((struct timeval *) &now, NULL) < 0)
  81     return -1;
  82
  83 #if NO_CREATION_TIME
  84 # define our_creation_time      startup_time
  85 #else
  86 # define our_creation_time      bi.startup_time
  87 #endif
  88   return (clock_from_time_value (&now)
  89           - clock_from_time_value (&our_creation_time));
  90 }
  91 weak_alias (__times, times)