1 /* Bit values & structures for resource limits. Alpha/Linux version.
2 Copyright (C) 1994, 1996, 1997, 1998, 1999, 2000, 2004, 2005
3 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
20 #ifndef _SYS_RESOURCE_H
21 # error "Never use <bits/resource.h> directly; include <sys/resource.h> instead."
24 #include <bits/types.h>
26 /* Transmute defines to enumerations. The macro re-definitions are
27 necessary because some programs want to test for operating system
28 features with #ifdef RUSAGE_SELF. In ISO C the reflexive
29 definition is a no-op. */
31 /* Kinds of resource limit. */
32 enum __rlimit_resource
34 /* Per-process CPU limit, in seconds. */
36 #define RLIMIT_CPU RLIMIT_CPU
38 /* Largest file that can be created, in bytes. */
40 #define RLIMIT_FSIZE RLIMIT_FSIZE
42 /* Maximum size of data segment, in bytes. */
44 #define RLIMIT_DATA RLIMIT_DATA
46 /* Maximum size of stack segment, in bytes. */
48 #define RLIMIT_STACK RLIMIT_STACK
50 /* Largest core file that can be created, in bytes. */
52 #define RLIMIT_CORE RLIMIT_CORE
54 /* Largest resident set size, in bytes.
55 This affects swapping; processes that are exceeding their
56 resident set size will be more likely to have physical memory
59 #define RLIMIT_RSS __RLIMIT_RSS
61 /* Number of open files. */
63 __RLIMIT_OFILE = RLIMIT_NOFILE, /* BSD name for same. */
64 #define RLIMIT_NOFILE RLIMIT_NOFILE
65 #define RLIMIT_OFILE __RLIMIT_OFILE
67 /* Address space limit (?) */
69 #define RLIMIT_AS RLIMIT_AS
71 /* Number of processes. */
73 #define RLIMIT_NPROC __RLIMIT_NPROC
75 /* Locked-in-memory address space. */
77 #define RLIMIT_MEMLOCK __RLIMIT_MEMLOCK
79 /* Maximum number of file locks. */
81 #define RLIMIT_LOCKS __RLIMIT_LOCKS
83 /* Maximum number of pending signals. */
84 __RLIMIT_SIGPENDING = 11,
85 #define RLIMIT_SIGPENDING __RLIMIT_SIGPENDING
87 /* Maximum bytes in POSIX message queues. */
88 __RLIMIT_MSGQUEUE = 12,
89 #define RLIMIT_MSGQUEUE __RLIMIT_MSGQUEUE
91 /* Maximum nice priority allowed to raise to.
92 Nice levels 19 .. -20 correspond to 0 .. 39
93 values of this resource limit. */
95 #define RLIMIT_NICE __RLIMIT_NICE
97 /* Maximum realtime priority allowed for non-priviledged
100 #define RLIMIT_RTPRIO __RLIMIT_RTPRIO
102 __RLIMIT_NLIMITS = 15,
103 __RLIM_NLIMITS = __RLIMIT_NLIMITS
104 #define RLIMIT_NLIMITS __RLIMIT_NLIMITS
105 #define RLIM_NLIMITS __RLIM_NLIMITS
108 /* Value to indicate that there is no limit. */
109 #ifndef __USE_FILE_OFFSET64
110 # define RLIM_INFINITY ((long int)(~0UL >> 1))
112 # define RLIM_INFINITY 0x7fffffffffffffffLL
115 #ifdef __USE_LARGEFILE64
116 # define RLIM64_INFINITY 0x7fffffffffffffffLL
119 /* We can represent all limits. */
120 #define RLIM_SAVED_MAX RLIM_INFINITY
121 #define RLIM_SAVED_CUR RLIM_INFINITY
124 /* Type for resource quantity measurement. */
125 #ifndef __USE_FILE_OFFSET64
126 typedef __rlim_t rlim_t;
128 typedef __rlim64_t rlim_t;
130 #ifdef __USE_LARGEFILE64
131 typedef __rlim64_t rlim64_t;
136 /* The current (soft) limit. */
138 /* The hard limit. */
142 #ifdef __USE_LARGEFILE64
145 /* The current (soft) limit. */
147 /* The hard limit. */
152 /* Whose usage statistics do you want? */
155 /* The calling process. */
157 #define RUSAGE_SELF RUSAGE_SELF
159 /* All of its terminated child processes. */
161 #define RUSAGE_CHILDREN RUSAGE_CHILDREN
164 #define __need_timeval
165 #include <bits/time.h> /* For `struct timeval'. */
167 /* Structure which says how much of each resource has been used. */
170 /* Total amount of user time used. */
171 struct timeval ru_utime;
172 /* Total amount of system time used. */
173 struct timeval ru_stime;
174 /* Maximum resident set size (in kilobytes). */
176 /* Amount of sharing of text segment memory
177 with other processes (kilobyte-seconds). */
179 /* Amount of data segment memory used (kilobyte-seconds). */
181 /* Amount of stack memory used (kilobyte-seconds). */
183 /* Number of soft page faults (i.e. those serviced by reclaiming
184 a page from the list of pages awaiting reallocation. */
186 /* Number of hard page faults (i.e. those that required I/O). */
188 /* Number of times a process was swapped out of physical memory. */
190 /* Number of input operations via the file system. Note: This
191 and `ru_oublock' do not include operations with the cache. */
193 /* Number of output operations via the file system. */
195 /* Number of IPC messages sent. */
197 /* Number of IPC messages received. */
199 /* Number of signals delivered. */
200 long int ru_nsignals;
201 /* Number of voluntary context switches, i.e. because the process
202 gave up the process before it had to (usually to wait for some
203 resource to be available). */
205 /* Number of involuntary context switches, i.e. a higher priority process
206 became runnable or the current process used up its time slice. */
210 /* Priority limits. */
211 #define PRIO_MIN -20 /* Minimum priority a process can have. */
212 #define PRIO_MAX 20 /* Maximum priority a process can have. */
214 /* The type of the WHICH argument to `getpriority' and `setpriority',
215 indicating what flavor of entity the WHO argument specifies. */
216 enum __priority_which
218 PRIO_PROCESS = 0, /* WHO is a process ID. */
219 #define PRIO_PROCESS PRIO_PROCESS
220 PRIO_PGRP = 1, /* WHO is a process group ID. */
221 #define PRIO_PGRP PRIO_PGRP
222 PRIO_USER = 2 /* WHO is a user ID. */
223 #define PRIO_USER PRIO_USER