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

   1 /* Bit values & structures for resource limits.  Alpha/Linux version.
   2    Copyright (C) 1994-2014 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   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.
   9
  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.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library.  If not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _SYS_RESOURCE_H
  20 # error "Never use <bits/resource.h> directly; include <sys/resource.h> instead."
  21 #endif
  22
  23 #include <bits/types.h>
  24
  25 /* Transmute defines to enumerations.  The macro re-definitions are
  26    necessary because some programs want to test for operating system
  27    features with #ifdef RUSAGE_SELF.  In ISO C the reflexive
  28    definition is a no-op.  */
  29
  30 /* Kinds of resource limit.  */
  31 enum __rlimit_resource
  32 {
  33   /* Per-process CPU limit, in seconds.  */
  34   RLIMIT_CPU = 0,
  35 #define RLIMIT_CPU RLIMIT_CPU
  36
  37   /* Largest file that can be created, in bytes.  */
  38   RLIMIT_FSIZE = 1,
  39 #define RLIMIT_FSIZE RLIMIT_FSIZE
  40
  41   /* Maximum size of data segment, in bytes.  */
  42   RLIMIT_DATA = 2,
  43 #define RLIMIT_DATA RLIMIT_DATA
  44
  45   /* Maximum size of stack segment, in bytes.  */
  46   RLIMIT_STACK = 3,
  47 #define RLIMIT_STACK RLIMIT_STACK
  48
  49   /* Largest core file that can be created, in bytes.  */
  50   RLIMIT_CORE = 4,
  51 #define RLIMIT_CORE RLIMIT_CORE
  52
  53   /* Largest resident set size, in bytes.
  54      This affects swapping; processes that are exceeding their
  55      resident set size will be more likely to have physical memory
  56      taken from them.  */
  57   __RLIMIT_RSS = 5,
  58 #define RLIMIT_RSS __RLIMIT_RSS
  59
  60   /* Number of open files.  */
  61   RLIMIT_NOFILE = 6,
  62   __RLIMIT_OFILE = RLIMIT_NOFILE, /* BSD name for same.  */
  63 #define RLIMIT_NOFILE RLIMIT_NOFILE
  64 #define RLIMIT_OFILE __RLIMIT_OFILE
  65
  66   /* Address space limit (?) */
  67   RLIMIT_AS = 7,
  68 #define RLIMIT_AS RLIMIT_AS
  69
  70   /* Number of processes.  */
  71   __RLIMIT_NPROC = 8,
  72 #define RLIMIT_NPROC __RLIMIT_NPROC
  73
  74   /* Locked-in-memory address space.  */
  75   __RLIMIT_MEMLOCK = 9,
  76 #define RLIMIT_MEMLOCK __RLIMIT_MEMLOCK
  77
  78   /* Maximum number of file locks.  */
  79   __RLIMIT_LOCKS = 10,
  80 #define RLIMIT_LOCKS __RLIMIT_LOCKS
  81
  82   /* Maximum number of pending signals.  */
  83   __RLIMIT_SIGPENDING = 11,
  84 #define RLIMIT_SIGPENDING __RLIMIT_SIGPENDING
  85
  86   /* Maximum bytes in POSIX message queues.  */
  87   __RLIMIT_MSGQUEUE = 12,
  88 #define RLIMIT_MSGQUEUE __RLIMIT_MSGQUEUE
  89
  90   /* Maximum nice priority allowed to raise to.
  91      Nice levels 19 .. -20 correspond to 0 .. 39
  92      values of this resource limit.  */
  93   __RLIMIT_NICE = 13,
  94 #define RLIMIT_NICE __RLIMIT_NICE
  95
  96   /* Maximum realtime priority allowed for non-priviledged
  97      processes.  */
  98   __RLIMIT_RTPRIO = 14,
  99 #define RLIMIT_RTPRIO __RLIMIT_RTPRIO
 100
 101   /* Maximum CPU time in µs that a process scheduled under a real-time
 102      scheduling policy may consume without making a blocking system
 103      call before being forcibly descheduled.  */
 104   __RLIMIT_RTTIME = 15,
 105 #define RLIMIT_RTTIME __RLIMIT_RTTIME
 106
 107   __RLIMIT_NLIMITS = 16,
 108   __RLIM_NLIMITS = __RLIMIT_NLIMITS
 109 #define RLIMIT_NLIMITS __RLIMIT_NLIMITS
 110 #define RLIM_NLIMITS __RLIM_NLIMITS
 111 };
 112
 113 /* Value to indicate that there is no limit.  */
 114 #ifndef __USE_FILE_OFFSET64
 115 # define RLIM_INFINITY ((long int)(~0UL >> 1))
 116 #else
 117 # define RLIM_INFINITY 0x7fffffffffffffffLL
 118 #endif
 119
 120 #ifdef __USE_LARGEFILE64
 121 # define RLIM64_INFINITY 0x7fffffffffffffffLL
 122 #endif
 123
 124 /* We can represent all limits.  */
 125 #define RLIM_SAVED_MAX  RLIM_INFINITY
 126 #define RLIM_SAVED_CUR  RLIM_INFINITY
 127
 128
 129 /* Type for resource quantity measurement.  */
 130 #ifndef __USE_FILE_OFFSET64
 131 typedef __rlim_t rlim_t;
 132 #else
 133 typedef __rlim64_t rlim_t;
 134 #endif
 135 #ifdef __USE_LARGEFILE64
 136 typedef __rlim64_t rlim64_t;
 137 #endif
 138
 139 struct rlimit
 140   {
 141     /* The current (soft) limit.  */
 142     rlim_t rlim_cur;
 143     /* The hard limit.  */
 144     rlim_t rlim_max;
 145   };
 146
 147 #ifdef __USE_LARGEFILE64
 148 struct rlimit64
 149   {
 150     /* The current (soft) limit.  */
 151     rlim64_t rlim_cur;
 152     /* The hard limit.  */
 153     rlim64_t rlim_max;
 154  };
 155 #endif
 156
 157 /* Whose usage statistics do you want?  */
 158 enum __rusage_who
 159 {
 160   /* The calling process.  */
 161   RUSAGE_SELF = 0,
 162 #define RUSAGE_SELF RUSAGE_SELF
 163
 164   /* All of its terminated child processes.  */
 165   RUSAGE_CHILDREN = -1
 166 #define RUSAGE_CHILDREN RUSAGE_CHILDREN
 167
 168 #ifdef __USE_GNU
 169   ,
 170   /* The calling thread.  */
 171   RUSAGE_THREAD = 1
 172 # define RUSAGE_THREAD RUSAGE_THREAD
 173   /* Name for the same functionality on Solaris.  */
 174 # define RUSAGE_LWP RUSAGE_THREAD
 175 #endif
 176 };
 177
 178 #define __need_timeval
 179 #include <bits/time.h>          /* For `struct timeval'.  */
 180
 181 /* Structure which says how much of each resource has been used.  */
 182 struct rusage
 183   {
 184     /* Total amount of user time used.  */
 185     struct timeval ru_utime;
 186     /* Total amount of system time used.  */
 187     struct timeval ru_stime;
 188     /* Maximum resident set size (in kilobytes).  */
 189     long int ru_maxrss;
 190     /* Amount of sharing of text segment memory
 191        with other processes (kilobyte-seconds).  */
 192     long int ru_ixrss;
 193     /* Amount of data segment memory used (kilobyte-seconds).  */
 194     long int ru_idrss;
 195     /* Amount of stack memory used (kilobyte-seconds).  */
 196     long int ru_isrss;
 197     /* Number of soft page faults (i.e. those serviced by reclaiming
 198        a page from the list of pages awaiting reallocation.  */
 199     long int ru_minflt;
 200     /* Number of hard page faults (i.e. those that required I/O).  */
 201     long int ru_majflt;
 202     /* Number of times a process was swapped out of physical memory.  */
 203     long int ru_nswap;
 204     /* Number of input operations via the file system.  Note: This
 205        and `ru_oublock' do not include operations with the cache.  */
 206     long int ru_inblock;
 207     /* Number of output operations via the file system.  */
 208     long int ru_oublock;
 209     /* Number of IPC messages sent.  */
 210     long int ru_msgsnd;
 211     /* Number of IPC messages received.  */
 212     long int ru_msgrcv;
 213     /* Number of signals delivered.  */
 214     long int ru_nsignals;
 215     /* Number of voluntary context switches, i.e. because the process
 216        gave up the process before it had to (usually to wait for some
 217        resource to be available).  */
 218     long int ru_nvcsw;
 219     /* Number of involuntary context switches, i.e. a higher priority process
 220        became runnable or the current process used up its time slice.  */
 221     long int ru_nivcsw;
 222   };
 223
 224 /* Priority limits.  */
 225 #define PRIO_MIN        -20     /* Minimum priority a process can have.  */
 226 #define PRIO_MAX        20      /* Maximum priority a process can have.  */
 227
 228 /* The type of the WHICH argument to `getpriority' and `setpriority',
 229    indicating what flavor of entity the WHO argument specifies.  */
 230 enum __priority_which
 231 {
 232   PRIO_PROCESS = 0,             /* WHO is a process ID.  */
 233 #define PRIO_PROCESS PRIO_PROCESS
 234   PRIO_PGRP = 1,                /* WHO is a process group ID.  */
 235 #define PRIO_PGRP PRIO_PGRP
 236   PRIO_USER = 2                 /* WHO is a user ID.  */
 237 #define PRIO_USER PRIO_USER
 238 };
 239
 240
 241 __BEGIN_DECLS
 242
 243 #ifdef __USE_GNU
 244 /* Modify and return resource limits of a process atomically.  */
 245 # ifndef __USE_FILE_OFFSET64
 246 extern int prlimit (__pid_t __pid, enum __rlimit_resource __resource,
 247                     const struct rlimit *__new_limit,
 248                     struct rlimit *__old_limit) __THROW;
 249 # else
 250 #  ifdef __REDIRECT_NTH
 251 extern int __REDIRECT_NTH (prlimit, (__pid_t __pid,
 252                                      enum __rlimit_resource __resource,
 253                                      const struct rlimit *__new_limit,
 254                                      struct rlimit *__old_limit), prlimit64);
 255 #  else
 256 #   define prlimit prlimit64
 257 #  endif
 258 # endif
 259 # ifdef __USE_LARGEFILE64
 260 extern int prlimit64 (__pid_t __pid, enum __rlimit_resource __resource,
 261                       const struct rlimit64 *__new_limit,
 262                       struct rlimit64 *__old_limit) __THROW;
 263 # endif
 264 #endif
 265
 266 __END_DECLS