sysdeps/unix/sysv/linux/alpha/bits/resource.h

   1 /* Bit values & structures for resource limits.  Alpha/Linux version.
   2    Copyright (C) 1994, 1996, 1997, 1998, 1999, 2000, 2004
   3    Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   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.
  10
  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.
  15
  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
  19    02111-1307 USA.  */
  20
  21 #ifndef _SYS_RESOURCE_H
  22 # error "Never use <bits/resource.h> directly; include <sys/resource.h> instead."
  23 #endif
  24
  25 #include <bits/types.h>
  26
  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.  */
  31
  32 /* Kinds of resource limit.  */
  33 enum __rlimit_resource
  34 {
  35   /* Per-process CPU limit, in seconds.  */
  36   RLIMIT_CPU = 0,
  37 #define RLIMIT_CPU RLIMIT_CPU
  38
  39   /* Largest file that can be created, in bytes.  */
  40   RLIMIT_FSIZE = 1,
  41 #define RLIMIT_FSIZE RLIMIT_FSIZE
  42
  43   /* Maximum size of data segment, in bytes.  */
  44   RLIMIT_DATA = 2,
  45 #define RLIMIT_DATA RLIMIT_DATA
  46
  47   /* Maximum size of stack segment, in bytes.  */
  48   RLIMIT_STACK = 3,
  49 #define RLIMIT_STACK RLIMIT_STACK
  50
  51   /* Largest core file that can be created, in bytes.  */
  52   RLIMIT_CORE = 4,
  53 #define RLIMIT_CORE RLIMIT_CORE
  54
  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
  58      taken from them.  */
  59   __RLIMIT_RSS = 5,
  60 #define RLIMIT_RSS __RLIMIT_RSS
  61
  62   /* Number of open files.  */
  63   RLIMIT_NOFILE = 6,
  64   __RLIMIT_OFILE = RLIMIT_NOFILE, /* BSD name for same.  */
  65 #define RLIMIT_NOFILE RLIMIT_NOFILE
  66 #define RLIMIT_OFILE __RLIMIT_OFILE
  67
  68   /* Address space limit (?) */
  69   RLIMIT_AS = 7,
  70 #define RLIMIT_AS RLIMIT_AS
  71
  72   /* Number of processes.  */
  73   __RLIMIT_NPROC = 8,
  74 #define RLIMIT_NPROC __RLIMIT_NPROC
  75
  76   /* Locked-in-memory address space.  */
  77   __RLIMIT_MEMLOCK = 9,
  78 #define RLIMIT_MEMLOCK __RLIMIT_MEMLOCK
  79
  80   /* Maximum number of file locks.  */
  81   __RLIMIT_LOCKS = 10,
  82 #define RLIMIT_LOCKS __RLIMIT_LOCKS
  83
  84   /* Maximum number of pending signals.  */
  85   __RLIMIT_SIGPENDING = 11,
  86 #define RLIMIT_SIGPENDING __RLIMIT_SIGPENDING
  87
  88   /* Maximum bytes in POSIX message queues.  */
  89   __RLIMIT_MSGQUEUE = 12,
  90 #define RLIMIT_MSGQUEUE __RLIMIT_MSGQUEUE
  91
  92   __RLIMIT_NLIMITS = 13,
  93   __RLIM_NLIMITS = __RLIMIT_NLIMITS
  94 #define RLIMIT_NLIMITS __RLIMIT_NLIMITS
  95 #define RLIM_NLIMITS __RLIM_NLIMITS
  96 };
  97
  98 /* Value to indicate that there is no limit.  */
  99 #ifndef __USE_FILE_OFFSET64
 100 # define RLIM_INFINITY ((long int)(~0UL >> 1))
 101 #else
 102 # define RLIM_INFINITY 0x7fffffffffffffffLL
 103 #endif
 104
 105 #ifdef __USE_LARGEFILE64
 106 # define RLIM64_INFINITY 0x7fffffffffffffffLL
 107 #endif
 108
 109 /* We can represent all limits.  */
 110 #define RLIM_SAVED_MAX  RLIM_INFINITY
 111 #define RLIM_SAVED_CUR  RLIM_INFINITY
 112
 113
 114 /* Type for resource quantity measurement.  */
 115 #ifndef __USE_FILE_OFFSET64
 116 typedef __rlim_t rlim_t;
 117 #else
 118 typedef __rlim64_t rlim_t;
 119 #endif
 120 #ifdef __USE_LARGEFILE64
 121 typedef __rlim64_t rlim64_t;
 122 #endif
 123
 124 struct rlimit
 125   {
 126     /* The current (soft) limit.  */
 127     rlim_t rlim_cur;
 128     /* The hard limit.  */
 129     rlim_t rlim_max;
 130   };
 131
 132 #ifdef __USE_LARGEFILE64
 133 struct rlimit64
 134   {
 135     /* The current (soft) limit.  */
 136     rlim64_t rlim_cur;
 137     /* The hard limit.  */
 138     rlim64_t rlim_max;
 139  };
 140 #endif
 141
 142 /* Whose usage statistics do you want?  */
 143 enum __rusage_who
 144 {
 145   /* The calling process.  */
 146   RUSAGE_SELF = 0,
 147 #define RUSAGE_SELF RUSAGE_SELF
 148
 149   /* All of its terminated child processes.  */
 150   RUSAGE_CHILDREN = -1
 151 #define RUSAGE_CHILDREN RUSAGE_CHILDREN
 152 };
 153
 154 #define __need_timeval
 155 #include <bits/time.h>          /* For `struct timeval'.  */
 156
 157 /* Structure which says how much of each resource has been used.  */
 158 struct rusage
 159   {
 160     /* Total amount of user time used.  */
 161     struct timeval ru_utime;
 162     /* Total amount of system time used.  */
 163     struct timeval ru_stime;
 164     /* Maximum resident set size (in kilobytes).  */
 165     long int ru_maxrss;
 166     /* Amount of sharing of text segment memory
 167        with other processes (kilobyte-seconds).  */
 168     long int ru_ixrss;
 169     /* Amount of data segment memory used (kilobyte-seconds).  */
 170     long int ru_idrss;
 171     /* Amount of stack memory used (kilobyte-seconds).  */
 172     long int ru_isrss;
 173     /* Number of soft page faults (i.e. those serviced by reclaiming
 174        a page from the list of pages awaiting reallocation.  */
 175     long int ru_minflt;
 176     /* Number of hard page faults (i.e. those that required I/O).  */
 177     long int ru_majflt;
 178     /* Number of times a process was swapped out of physical memory.  */
 179     long int ru_nswap;
 180     /* Number of input operations via the file system.  Note: This
 181        and `ru_oublock' do not include operations with the cache.  */
 182     long int ru_inblock;
 183     /* Number of output operations via the file system.  */
 184     long int ru_oublock;
 185     /* Number of IPC messages sent.  */
 186     long int ru_msgsnd;
 187     /* Number of IPC messages received.  */
 188     long int ru_msgrcv;
 189     /* Number of signals delivered.  */
 190     long int ru_nsignals;
 191     /* Number of voluntary context switches, i.e. because the process
 192        gave up the process before it had to (usually to wait for some
 193        resource to be available).  */
 194     long int ru_nvcsw;
 195     /* Number of involuntary context switches, i.e. a higher priority process
 196        became runnable or the current process used up its time slice.  */
 197     long int ru_nivcsw;
 198   };
 199
 200 /* Priority limits.  */
 201 #define PRIO_MIN        -20     /* Minimum priority a process can have.  */
 202 #define PRIO_MAX        20      /* Maximum priority a process can have.  */
 203
 204 /* The type of the WHICH argument to `getpriority' and `setpriority',
 205    indicating what flavor of entity the WHO argument specifies.  */
 206 enum __priority_which
 207 {
 208   PRIO_PROCESS = 0,             /* WHO is a process ID.  */
 209 #define PRIO_PROCESS PRIO_PROCESS
 210   PRIO_PGRP = 1,                /* WHO is a process group ID.  */
 211 #define PRIO_PGRP PRIO_PGRP
 212   PRIO_USER = 2                 /* WHO is a user ID.  */
 213 #define PRIO_USER PRIO_USER
 214 };