1/* Copyright (C) 1991-2020 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 <https://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25/* This interface is obsolete; use `getrusage' instead.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
31struct 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. */
64extern int vtimes (struct vtimes * __current, struct vtimes * __child) __THROW;
65
66__END_DECLS
67
68#endif /* sys/vtimes.h */
69