1  /* Return CPU and real time used by process and its children.  Hurd version.
       2     Copyright (C) 2001-2023 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, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <errno.h>
      20  #include <stddef.h>
      21  #include <sys/resource.h>
      22  #include <sys/times.h>
      23  #include <sys/time.h>
      24  #include <time.h>
      25  #include <mach.h>
      26  #include <mach/task_info.h>
      27  #include <hurd.h>
      28  
      29  static inline clock_t
      30  clock_from_time_value (const time_value_t *t)
      31  {
      32    return t->seconds * 1000000 + t->microseconds;
      33  }
      34  
      35  /* Store the CPU time used by this process and all its
      36     dead children (and their dead children) in BUFFER.
      37     Return the elapsed real time, or (clock_t) -1 for errors.
      38     All times are in CLK_TCKths of a second.  */
      39  clock_t
      40  __times (struct tms *tms)
      41  {
      42    struct task_basic_info bi;
      43    struct task_thread_times_info tti;
      44    mach_msg_type_number_t count;
      45    time_value_t now;
      46    error_t err;
      47  
      48    count = TASK_BASIC_INFO_COUNT;
      49    err = __task_info (__mach_task_self (), TASK_BASIC_INFO,
      50  		     (task_info_t) &bi, &count);
      51    if (err)
      52      return __hurd_fail (err);
      53  
      54    count = TASK_THREAD_TIMES_INFO_COUNT;
      55    err = __task_info (__mach_task_self (), TASK_THREAD_TIMES_INFO,
      56  		     (task_info_t) &tti, &count);
      57    if (err)
      58      return __hurd_fail (err);
      59  
      60    tms->tms_utime = (clock_from_time_value (&bi.user_time)
      61  		    + clock_from_time_value (&tti.user_time));
      62    tms->tms_stime = (clock_from_time_value (&bi.system_time)
      63  		    + clock_from_time_value (&tti.system_time));
      64  
      65    /* XXX This can't be implemented until getrusage(RUSAGE_CHILDREN) can be.  */
      66    tms->tms_cutime = tms->tms_cstime = 0;
      67  
      68    __host_get_time (__mach_host_self (), &now);
      69  
      70    return (clock_from_time_value (&now)
      71  	  - clock_from_time_value (&bi.creation_time));
      72  }
      73  weak_alias (__times, times)