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 /* Maximum CPU time in µs that a process scheduled under a real-time
103 scheduling policy may consume without making a blocking system
104 call before being forcibly descheduled. */
105 __RLIMIT_RTTIME
= 15,
106 #define RLIMIT_RTTIME __RLIMIT_RTTIME
108 __RLIMIT_NLIMITS
= 16,
109 __RLIM_NLIMITS
= __RLIMIT_NLIMITS
110 #define RLIMIT_NLIMITS __RLIMIT_NLIMITS
111 #define RLIM_NLIMITS __RLIM_NLIMITS
114 /* Value to indicate that there is no limit. */
115 #ifndef __USE_FILE_OFFSET64
116 # define RLIM_INFINITY ((long int)(~0UL >> 1))
118 # define RLIM_INFINITY 0x7fffffffffffffffLL
121 #ifdef __USE_LARGEFILE64
122 # define RLIM64_INFINITY 0x7fffffffffffffffLL
125 /* We can represent all limits. */
126 #define RLIM_SAVED_MAX RLIM_INFINITY
127 #define RLIM_SAVED_CUR RLIM_INFINITY
130 /* Type for resource quantity measurement. */
131 #ifndef __USE_FILE_OFFSET64
132 typedef __rlim_t rlim_t
;
134 typedef __rlim64_t rlim_t
;
136 #ifdef __USE_LARGEFILE64
137 typedef __rlim64_t rlim64_t
;
142 /* The current (soft) limit. */
144 /* The hard limit. */
148 #ifdef __USE_LARGEFILE64
151 /* The current (soft) limit. */
153 /* The hard limit. */
158 /* Whose usage statistics do you want? */
161 /* The calling process. */
163 #define RUSAGE_SELF RUSAGE_SELF
165 /* All of its terminated child processes. */
167 #define RUSAGE_CHILDREN RUSAGE_CHILDREN
171 /* The calling thread. */
173 # define RUSAGE_THREAD RUSAGE_THREAD
174 /* Name for the same functionality on Solaris. */
175 # define RUSAGE_LWP RUSAGE_THREAD
179 #define __need_timeval
180 #include <bits/time.h> /* For `struct timeval'. */
182 /* Structure which says how much of each resource has been used. */
185 /* Total amount of user time used. */
186 struct timeval ru_utime
;
187 /* Total amount of system time used. */
188 struct timeval ru_stime
;
189 /* Maximum resident set size (in kilobytes). */
191 /* Amount of sharing of text segment memory
192 with other processes (kilobyte-seconds). */
194 /* Amount of data segment memory used (kilobyte-seconds). */
196 /* Amount of stack memory used (kilobyte-seconds). */
198 /* Number of soft page faults (i.e. those serviced by reclaiming
199 a page from the list of pages awaiting reallocation. */
201 /* Number of hard page faults (i.e. those that required I/O). */
203 /* Number of times a process was swapped out of physical memory. */
205 /* Number of input operations via the file system. Note: This
206 and `ru_oublock' do not include operations with the cache. */
208 /* Number of output operations via the file system. */
210 /* Number of IPC messages sent. */
212 /* Number of IPC messages received. */
214 /* Number of signals delivered. */
215 long int ru_nsignals
;
216 /* Number of voluntary context switches, i.e. because the process
217 gave up the process before it had to (usually to wait for some
218 resource to be available). */
220 /* Number of involuntary context switches, i.e. a higher priority process
221 became runnable or the current process used up its time slice. */
225 /* Priority limits. */
226 #define PRIO_MIN -20 /* Minimum priority a process can have. */
227 #define PRIO_MAX 20 /* Maximum priority a process can have. */
229 /* The type of the WHICH argument to `getpriority' and `setpriority',
230 indicating what flavor of entity the WHO argument specifies. */
231 enum __priority_which
233 PRIO_PROCESS
= 0, /* WHO is a process ID. */
234 #define PRIO_PROCESS PRIO_PROCESS
235 PRIO_PGRP
= 1, /* WHO is a process group ID. */
236 #define PRIO_PGRP PRIO_PGRP
237 PRIO_USER
= 2 /* WHO is a user ID. */
238 #define PRIO_USER PRIO_USER