posix/sys/times.h

   1 /* Copyright (C) 1991-2017 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 Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the 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    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 /*
  19  *      POSIX Standard: 4.5.2 Process Times     <sys/times.h>
  20  */
  21
  22 #ifndef _SYS_TIMES_H
  23 #define _SYS_TIMES_H    1
  24
  25 #include <features.h>
  26
  27 #include <bits/types/clock_t.h>
  28
  29 __BEGIN_DECLS
  30
  31 /* Structure describing CPU time used by a process and its children.  */
  32 struct tms
  33   {
  34     clock_t tms_utime;          /* User CPU time.  */
  35     clock_t tms_stime;          /* System CPU time.  */
  36
  37     clock_t tms_cutime;         /* User CPU time of dead children.  */
  38     clock_t tms_cstime;         /* System CPU time of dead children.  */
  39   };
  40
  41
  42 /* Store the CPU time used by this process and all its
  43    dead children (and their dead children) in BUFFER.
  44    Return the elapsed real time, or (clock_t) -1 for errors.
  45    All times are in CLK_TCKths of a second.  */
  46 extern clock_t times (struct tms *__buffer) __THROW;
  47
  48 __END_DECLS
  49
  50 #endif /* sys/times.h   */