resource/sys/vtimes.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 #ifndef _SYS_VTIMES_H
  19 #define _SYS_VTIMES_H   1
  20
  21 #include <features.h>
  22
  23 __BEGIN_DECLS
  24
  25 /* This interface is obsolete; use `getrusage' instead.  */
  26
  27 /* Granularity of the `vm_utime' and `vm_stime' fields of a `struct vtimes'.
  28    (This is the frequency of the machine's power supply, in Hz.)  */
  29 #define VTIMES_UNITS_PER_SECOND 60
  30
  31 struct vtimes
  32 {
  33   /* User time used in units of 1/VTIMES_UNITS_PER_SECOND seconds.  */
  34   int vm_utime;
  35   /* System time used in units of 1/VTIMES_UNITS_PER_SECOND seconds.  */
  36   int vm_stime;
  37
  38   /* Amount of data and stack memory used (kilobyte-seconds).  */
  39   unsigned int vm_idsrss;
  40   /* Amount of text memory used (kilobyte-seconds).  */
  41   unsigned int vm_ixrss;
  42   /* Maximum resident set size (text, data, and stack) (kilobytes).  */
  43   int vm_maxrss;
  44
  45   /* Number of hard page faults (i.e. those that required I/O).  */
  46   int vm_majflt;
  47   /* Number of soft page faults (i.e. those serviced by reclaiming
  48      a page from the list of pages awaiting reallocation.  */
  49   int vm_minflt;
  50
  51   /* Number of times a process was swapped out of physical memory.  */
  52   int vm_nswap;
  53
  54   /* Number of input operations via the file system.  Note: This
  55      and `ru_oublock' do not include operations with the cache.  */
  56   int vm_inblk;
  57   /* Number of output operations via the file system.  */
  58   int vm_oublk;
  59 };
  60
  61 /* If CURRENT is not NULL, write statistics for the current process into
  62    *CURRENT.  If CHILD is not NULL, write statistics for all terminated child
  63    processes into *CHILD.  Returns 0 for success, -1 for failure.  */
  64 extern int vtimes (struct vtimes * __current, struct vtimes * __child) __THROW;
  65
  66 __END_DECLS
  67
  68 #endif /* sys/vtimes.h  */