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[glibc.git] / bits / resource.h
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1 /* Bit values & structures for resource limits. 4.4 BSD/generic GNU version.
2 Copyright (C) 1994, 1996, 1997, 1998 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 02111-1307 USA. */
20 #ifndef _SYS_RESOURCE_H
21 # error "Never use <bits/resource.h> directly; include <sys/resource.h> instead."
22 #endif
24 #include <bits/types.h>
26 /* These are the values for 4.4 BSD and GNU. Earlier BSD systems have a
27 subset of these kinds of resource limit. In systems where `getrlimit'
28 and `setrlimit' are not system calls, these are the values used by the C
29 library to emulate them. */
31 /* Kinds of resource limit. */
32 enum __rlimit_resource
34 /* Per-process CPU limit, in seconds. */
35 RLIMIT_CPU,
36 #define RLIMIT_CPU RLIMIT_CPU
37 /* Largest file that can be created, in bytes. */
38 RLIMIT_FSIZE,
39 #define RLIMIT_FSIZE RLIMIT_FSIZE
40 /* Maximum size of data segment, in bytes. */
41 RLIMIT_DATA,
42 #define RLIMIT_DATA RLIMIT_DATA
43 /* Maximum size of stack segment, in bytes. */
44 RLIMIT_STACK,
45 #define RLIMIT_STACK RLIMIT_STACK
46 /* Largest core file that can be created, in bytes. */
47 RLIMIT_CORE,
48 #define RLIMIT_CORE RLIMIT_CORE
49 /* Largest resident set size, in bytes.
50 This affects swapping; processes that are exceeding their
51 resident set size will be more likely to have physical memory
52 taken from them. */
53 RLIMIT_RSS,
54 #define RLIMIT_RSS RLIMIT_RSS
55 /* Locked-in-memory address space. */
56 RLIMIT_MEMLOCK,
57 #define RLIMIT_MEMLOCK RLIMIT_MEMLOCK
58 /* Number of processes. */
59 RLIMIT_NPROC,
60 #define RLIMIT_NPROC RLIMIT_NPROC
61 /* Number of open files. */
62 RLIMIT_OFILE,
63 RLIMIT_NOFILE = RLIMIT_OFILE, /* Another name for the same thing. */
64 #define RLIMIT_OFILE RLIMIT_OFILE
65 #define RLIMIT_NOFILE RLIMIT_NOFILE
67 RLIMIT_NLIMITS, /* Number of limit flavors. */
68 RLIM_NLIMITS = RLIMIT_NLIMITS /* Traditional name for same. */
71 /* Value to indicate that there is no limit. */
72 #ifndef __USE_FILE_OFFSET64
73 # define RLIM_INFINITY 0x7fffffff
74 #else
75 # define RLIM_INFINITY 0x7fffffffffffffffLL
76 #endif
78 #ifdef __USE_LARGEFILE64
79 # define RLIM64_INFINITY 0x7fffffffffffffffLL
80 #endif
83 /* Type for resource quantity measurement. */
84 #ifndef __USE_FILE_OFFSET64
85 typedef __rlim_t rlim_t;
86 #else
87 typedef __rlim64_t rlim_t;
88 #endif
89 #ifdef __USE_LARGEFILE64
90 typedef __rlim64_t rlim64_t;
91 #endif
93 struct rlimit
95 /* The current (soft) limit. */
96 rlim_t rlim_cur;
97 /* The hard limit. */
98 rlim_t rlim_max;
101 #ifdef __USE_LARGEFILE64
102 struct rlimit64
104 /* The current (soft) limit. */
105 rlim64_t rlim_cur;
106 /* The hard limit. */
107 rlim64_t rlim_max;
109 #endif
111 /* Whose usage statistics do you want? */
112 enum __rusage_who
113 /* The macro definitions are necessary because some programs want
114 to test for operating system features with #ifdef RUSAGE_SELF.
115 In ISO C the reflexive definition is a no-op. */
117 /* The calling process. */
118 RUSAGE_SELF = 0,
119 #define RUSAGE_SELF RUSAGE_SELF
120 /* All of its terminated child processes. */
121 RUSAGE_CHILDREN = -1
122 #define RUSAGE_CHILDREN RUSAGE_CHILDREN
125 #define __need_timeval
126 #include <bits/time.h> /* For `struct timeval'. */
128 /* Structure which says how much of each resource has been used. */
129 struct rusage
131 /* Total amount of user time used. */
132 struct timeval ru_utime;
133 /* Total amount of system time used. */
134 struct timeval ru_stime;
135 /* Maximum resident set size (in kilobytes). */
136 long int ru_maxrss;
137 /* Amount of sharing of text segment memory
138 with other processes (kilobyte-seconds). */
139 long int ru_ixrss;
140 /* Amount of data segment memory used (kilobyte-seconds). */
141 long int ru_idrss;
142 /* Amount of stack memory used (kilobyte-seconds). */
143 long int ru_isrss;
144 /* Number of soft page faults (i.e. those serviced by reclaiming
145 a page from the list of pages awaiting reallocation. */
146 long int ru_minflt;
147 /* Number of hard page faults (i.e. those that required I/O). */
148 long int ru_majflt;
149 /* Number of times a process was swapped out of physical memory. */
150 long int ru_nswap;
151 /* Number of input operations via the file system. Note: This
152 and `ru_oublock' do not include operations with the cache. */
153 long int ru_inblock;
154 /* Number of output operations via the file system. */
155 long int ru_oublock;
156 /* Number of IPC messages sent. */
157 long int ru_msgsnd;
158 /* Number of IPC messages received. */
159 long int ru_msgrcv;
160 /* Number of signals delivered. */
161 long int ru_nsignals;
162 /* Number of voluntary context switches, i.e. because the process
163 gave up the process before it had to (usually to wait for some
164 resource to be available). */
165 long int ru_nvcsw;
166 /* Number of involuntary context switches, i.e. a higher priority process
167 became runnable or the current process used up its time slice. */
168 long int ru_nivcsw;
171 /* Priority limits. */
172 #define PRIO_MIN -20 /* Minimum priority a process can have. */
173 #define PRIO_MAX 20 /* Maximum priority a process can have. */
175 /* The type of the WHICH argument to `getpriority' and `setpriority',
176 indicating what flavor of entity the WHO argument specifies. */
177 enum __priority_which
179 PRIO_PROCESS = 0, /* WHO is a process ID. */
180 PRIO_PGRP = 1, /* WHO is a process group ID. */
181 PRIO_USER = 2 /* WHO is a user ID. */