sysdeps/generic/vtimes.c

   1 /* Copyright (C) 1991 Free Software Foundation, Inc.
   2 This file is part of the GNU C Library.
   3
   4 The GNU C Library is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 License, or (at your option) any later version.
   8
   9 The GNU C Library is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #include <ansidecl.h>
  20 #include <stddef.h>
  21 #include <sys/vtimes.h>
  22 #include <sys/resource.h>
  23
  24 /* Return the number of 1/VTIMES_UNITS_PER_SECOND-second
  25    units in the `struct timeval' TV.  */
  26 #define TIMEVAL_TO_VTIMES(tv) \
  27   ((tv.tv_sec * VTIMES_UNITS_PER_SECOND) + \
  28    (tv.tv_usec * VTIMES_UNITS_PER_SECOND / 1000000))
  29
  30 /* If VT is not NULL, write statistics for WHO into *VT.
  31    Return 0 for success, -1 for failure.  */
  32 static int
  33 DEFUN(vtimes_one, (vt, who),
  34       struct vtimes *vt AND enum __rusage_who who)
  35 {
  36   if (vt != NULL)
  37     {
  38       struct rusage usage;
  39
  40       if (getrusage(who, &usage) < 0)
  41         return -1;
  42
  43       vt->vm_utime = TIMEVAL_TO_VTIMES(usage.ru_utime);
  44       vt->vm_stime = TIMEVAL_TO_VTIMES(usage.ru_stime);
  45       vt->vm_idsrss = usage.ru_idrss + usage.ru_isrss;
  46       vt->vm_majflt = usage.ru_majflt;
  47       vt->vm_minflt = usage.ru_minflt;
  48       vt->vm_nswap = usage.ru_nswap;
  49       vt->vm_inblk = usage.ru_inblock;
  50       vt->vm_oublk = usage.ru_oublock;
  51     }
  52   return 0;
  53 }
  54
  55 /* If CURRENT is not NULL, write statistics for the current process into
  56    *CURRENT.  If CHILD is not NULL, write statistics for all terminated child
  57    processes into *CHILD.  Returns 0 for success, -1 for failure.  */
  58 int
  59 DEFUN(vtimes, (current, child),
  60       struct vtimes *current AND struct vtimes *child)
  61 {
  62   if (vtimes_one(current, RUSAGE_SELF) < 0 ||
  63       vtimes_one(child, RUSAGE_CHILDREN) < 0)
  64     return -1;
  65   return 0;
  66 }