1 /* Bit values & structures for resource limits. Linux version.
2 Copyright (C) 1994, 1996-2000, 2004, 2005, 2008, 2009, 2010, 2011, 2012
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, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 #ifndef _SYS_RESOURCE_H
22 # error "Never use <bits/resource.h> directly; include <sys/resource.h> instead."
25 #include <bits/types.h>
27 /* Transmute defines to enumerations. The macro re-definitions are
28 necessary because some programs want to test for operating system
29 features with #ifdef RUSAGE_SELF. In ISO C the reflexive
30 definition is a no-op. */
32 /* Kinds of resource limit. */
33 enum __rlimit_resource
35 /* Per-process CPU limit, in seconds. */
37 #define RLIMIT_CPU RLIMIT_CPU
39 /* Largest file that can be created, in bytes. */
41 #define RLIMIT_FSIZE RLIMIT_FSIZE
43 /* Maximum size of data segment, in bytes. */
45 #define RLIMIT_DATA RLIMIT_DATA
47 /* Maximum size of stack segment, in bytes. */
49 #define RLIMIT_STACK RLIMIT_STACK
51 /* Largest core file that can be created, in bytes. */
53 #define RLIMIT_CORE RLIMIT_CORE
55 /* Largest resident set size, in bytes.
56 This affects swapping; processes that are exceeding their
57 resident set size will be more likely to have physical memory
60 #define RLIMIT_RSS __RLIMIT_RSS
62 /* Number of open files. */
64 __RLIMIT_OFILE = RLIMIT_NOFILE, /* BSD name for same. */
65 #define RLIMIT_NOFILE RLIMIT_NOFILE
66 #define RLIMIT_OFILE __RLIMIT_OFILE
68 /* Address space limit. */
70 #define RLIMIT_AS RLIMIT_AS
72 /* Number of processes. */
74 #define RLIMIT_NPROC __RLIMIT_NPROC
76 /* Locked-in-memory address space. */
78 #define RLIMIT_MEMLOCK __RLIMIT_MEMLOCK
80 /* Maximum number of file locks. */
82 #define RLIMIT_LOCKS __RLIMIT_LOCKS
84 /* Maximum number of pending signals. */
85 __RLIMIT_SIGPENDING = 11,
86 #define RLIMIT_SIGPENDING __RLIMIT_SIGPENDING
88 /* Maximum bytes in POSIX message queues. */
89 __RLIMIT_MSGQUEUE = 12,
90 #define RLIMIT_MSGQUEUE __RLIMIT_MSGQUEUE
92 /* Maximum nice priority allowed to raise to.
93 Nice levels 19 .. -20 correspond to 0 .. 39
94 values of this resource limit. */
96 #define RLIMIT_NICE __RLIMIT_NICE
98 /* Maximum realtime priority allowed for non-priviledged
100 __RLIMIT_RTPRIO = 14,
101 #define RLIMIT_RTPRIO __RLIMIT_RTPRIO
103 /* Maximum CPU time in µs that a process scheduled under a real-time
104 scheduling policy may consume without making a blocking system
105 call before being forcibly descheduled. */
106 __RLIMIT_RTTIME = 15,
107 #define RLIMIT_RTTIME __RLIMIT_RTTIME
109 __RLIMIT_NLIMITS = 16,
110 __RLIM_NLIMITS = __RLIMIT_NLIMITS
111 #define RLIMIT_NLIMITS __RLIMIT_NLIMITS
112 #define RLIM_NLIMITS __RLIM_NLIMITS
115 /* Value to indicate that there is no limit. */
116 #ifndef __USE_FILE_OFFSET64
117 # define RLIM_INFINITY ((unsigned long int)(~0UL))
119 # define RLIM_INFINITY 0xffffffffffffffffuLL
122 #ifdef __USE_LARGEFILE64
123 # define RLIM64_INFINITY 0xffffffffffffffffuLL
126 /* We can represent all limits. */
127 #define RLIM_SAVED_MAX RLIM_INFINITY
128 #define RLIM_SAVED_CUR RLIM_INFINITY
131 /* Type for resource quantity measurement. */
132 #ifndef __USE_FILE_OFFSET64
133 typedef __rlim_t rlim_t;
135 typedef __rlim64_t rlim_t;
137 #ifdef __USE_LARGEFILE64
138 typedef __rlim64_t rlim64_t;
143 /* The current (soft) limit. */
145 /* The hard limit. */
149 #ifdef __USE_LARGEFILE64
152 /* The current (soft) limit. */
154 /* The hard limit. */
159 /* Whose usage statistics do you want? */
162 /* The calling process. */
164 #define RUSAGE_SELF RUSAGE_SELF
166 /* All of its terminated child processes. */
168 #define RUSAGE_CHILDREN RUSAGE_CHILDREN
172 /* The calling thread. */
174 # define RUSAGE_THREAD RUSAGE_THREAD
175 /* Name for the same functionality on Solaris. */
176 # define RUSAGE_LWP RUSAGE_THREAD
180 #define __need_timeval
181 #include <bits/time.h> /* For `struct timeval'. */
183 /* Structure which says how much of each resource has been used. */
186 /* Total amount of user time used. */
187 struct timeval ru_utime;
188 /* Total amount of system time used. */
189 struct timeval ru_stime;
190 /* Maximum resident set size (in kilobytes). */
192 /* Amount of sharing of text segment memory
193 with other processes (kilobyte-seconds). */
195 /* Amount of data segment memory used (kilobyte-seconds). */
197 /* Amount of stack memory used (kilobyte-seconds). */
199 /* Number of soft page faults (i.e. those serviced by reclaiming
200 a page from the list of pages awaiting reallocation. */
202 /* Number of hard page faults (i.e. those that required I/O). */
204 /* Number of times a process was swapped out of physical memory. */
206 /* Number of input operations via the file system. Note: This
207 and `ru_oublock' do not include operations with the cache. */
209 /* Number of output operations via the file system. */
211 /* Number of IPC messages sent. */
213 /* Number of IPC messages received. */
215 /* Number of signals delivered. */
216 long int ru_nsignals;
217 /* Number of voluntary context switches, i.e. because the process
218 gave up the process before it had to (usually to wait for some
219 resource to be available). */
221 /* Number of involuntary context switches, i.e. a higher priority process
222 became runnable or the current process used up its time slice. */
226 /* Priority limits. */
227 #define PRIO_MIN -20 /* Minimum priority a process can have. */
228 #define PRIO_MAX 20 /* Maximum priority a process can have. */
230 /* The type of the WHICH argument to `getpriority' and `setpriority',
231 indicating what flavor of entity the WHO argument specifies. */
232 enum __priority_which
234 PRIO_PROCESS = 0, /* WHO is a process ID. */
235 #define PRIO_PROCESS PRIO_PROCESS
236 PRIO_PGRP = 1, /* WHO is a process group ID. */
237 #define PRIO_PGRP PRIO_PGRP
238 PRIO_USER = 2 /* WHO is a user ID. */
239 #define PRIO_USER PRIO_USER
246 /* Modify and return resource limits of a process atomically. */
247 # ifndef __USE_FILE_OFFSET64
248 extern int prlimit (__pid_t __pid, enum __rlimit_resource __resource,
249 const struct rlimit *__new_limit,
250 struct rlimit *__old_limit) __THROW;
252 # ifdef __REDIRECT_NTH
253 extern int __REDIRECT_NTH (prlimit, (__pid_t __pid,
254 enum __rlimit_resource __resource,
255 const struct rlimit *__new_limit,
256 struct rlimit *__old_limit), prlimit64);
258 # define prlimit prlimit64
261 # ifdef __USE_LARGEFILE64
262 extern int prlimit64 (__pid_t __pid, enum __rlimit_resource __resource,
263 const struct rlimit64 *__new_limit,
264 struct rlimit64 *__old_limit) __THROW;