resource.h 6.8 KB

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  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.
  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. The GNU C Library is distributed in the hope that it will be useful,
  10. but WITHOUT ANY WARRANTY; without even the implied warranty of
  11. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12. Lesser General Public License for more details.
  13. You should have received a copy of the GNU Lesser General Public
  14. License along with the GNU C Library; if not, write to the Free
  15. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  16. 02111-1307 USA. */
  17. #ifndef _SYS_RESOURCE_H
  18. # error "Never use <bits/resource.h> directly; include <sys/resource.h> instead."
  19. #endif
  20. #include <bits/types.h>
  21. /* Transmute defines to enumerations. The macro re-definitions are
  22. necessary because some programs want to test for operating system
  23. features with #ifdef RUSAGE_SELF. In ISO C the reflexive
  24. definition is a no-op. */
  25. /* Kinds of resource limit. */
  26. enum __rlimit_resource
  27. {
  28. /* Per-process CPU limit, in seconds. */
  29. RLIMIT_CPU = 0,
  30. #define RLIMIT_CPU RLIMIT_CPU
  31. /* Largest file that can be created, in bytes. */
  32. RLIMIT_FSIZE = 1,
  33. #define RLIMIT_FSIZE RLIMIT_FSIZE
  34. /* Maximum size of data segment, in bytes. */
  35. RLIMIT_DATA = 2,
  36. #define RLIMIT_DATA RLIMIT_DATA
  37. /* Maximum size of stack segment, in bytes. */
  38. RLIMIT_STACK = 3,
  39. #define RLIMIT_STACK RLIMIT_STACK
  40. /* Largest core file that can be created, in bytes. */
  41. RLIMIT_CORE = 4,
  42. #define RLIMIT_CORE RLIMIT_CORE
  43. /* Largest resident set size, in bytes.
  44. This affects swapping; processes that are exceeding their
  45. resident set size will be more likely to have physical memory
  46. taken from them. */
  47. __RLIMIT_RSS = 5,
  48. #define RLIMIT_RSS __RLIMIT_RSS
  49. /* Number of open files. */
  50. RLIMIT_NOFILE = 6,
  51. __RLIMIT_OFILE = RLIMIT_NOFILE, /* BSD name for same. */
  52. #define RLIMIT_NOFILE RLIMIT_NOFILE
  53. #define RLIMIT_OFILE __RLIMIT_OFILE
  54. /* Address space limit (?) */
  55. RLIMIT_AS = 7,
  56. #define RLIMIT_AS RLIMIT_AS
  57. /* Number of processes. */
  58. __RLIMIT_NPROC = 8,
  59. #define RLIMIT_NPROC __RLIMIT_NPROC
  60. /* Locked-in-memory address space. */
  61. __RLIMIT_MEMLOCK = 9,
  62. #define RLIMIT_MEMLOCK __RLIMIT_MEMLOCK
  63. /* Maximum number of file locks. */
  64. __RLIMIT_LOCKS = 10,
  65. #define RLIMIT_LOCKS __RLIMIT_LOCKS
  66. /* Maximum number of pending signals. */
  67. __RLIMIT_SIGPENDING = 11,
  68. #define RLIMIT_SIGPENDING __RLIMIT_SIGPENDING
  69. /* Maximum bytes in POSIX message queues. */
  70. __RLIMIT_MSGQUEUE = 12,
  71. #define RLIMIT_MSGQUEUE __RLIMIT_MSGQUEUE
  72. /* Maximum nice priority allowed to raise to.
  73. Nice levels 19 .. -20 correspond to 0 .. 39
  74. values of this resource limit. */
  75. __RLIMIT_NICE = 13,
  76. #define RLIMIT_NICE __RLIMIT_NICE
  77. /* Maximum realtime priority allowed for non-priviledged
  78. processes. */
  79. __RLIMIT_RTPRIO = 14,
  80. #define RLIMIT_RTPRIO __RLIMIT_RTPRIO
  81. __RLIMIT_NLIMITS = 15,
  82. __RLIM_NLIMITS = __RLIMIT_NLIMITS
  83. #define RLIMIT_NLIMITS __RLIMIT_NLIMITS
  84. #define RLIM_NLIMITS __RLIM_NLIMITS
  85. };
  86. /* Value to indicate that there is no limit. */
  87. #ifndef __USE_FILE_OFFSET64
  88. # define RLIM_INFINITY ((long int)(~0UL >> 1))
  89. #else
  90. # define RLIM_INFINITY 0x7fffffffffffffffLL
  91. #endif
  92. #ifdef __USE_LARGEFILE64
  93. # define RLIM64_INFINITY 0x7fffffffffffffffLL
  94. #endif
  95. /* We can represent all limits. */
  96. #define RLIM_SAVED_MAX RLIM_INFINITY
  97. #define RLIM_SAVED_CUR RLIM_INFINITY
  98. /* Type for resource quantity measurement. */
  99. #ifndef __USE_FILE_OFFSET64
  100. typedef __rlim_t rlim_t;
  101. #else
  102. typedef __rlim64_t rlim_t;
  103. #endif
  104. #ifdef __USE_LARGEFILE64
  105. typedef __rlim64_t rlim64_t;
  106. #endif
  107. struct rlimit
  108. {
  109. /* The current (soft) limit. */
  110. rlim_t rlim_cur;
  111. /* The hard limit. */
  112. rlim_t rlim_max;
  113. };
  114. #ifdef __USE_LARGEFILE64
  115. struct rlimit64
  116. {
  117. /* The current (soft) limit. */
  118. rlim64_t rlim_cur;
  119. /* The hard limit. */
  120. rlim64_t rlim_max;
  121. };
  122. #endif
  123. /* Whose usage statistics do you want? */
  124. enum __rusage_who
  125. {
  126. /* The calling process. */
  127. RUSAGE_SELF = 0,
  128. #define RUSAGE_SELF RUSAGE_SELF
  129. /* All of its terminated child processes. */
  130. RUSAGE_CHILDREN = -1
  131. #define RUSAGE_CHILDREN RUSAGE_CHILDREN
  132. };
  133. #define __need_timeval
  134. #include <bits/time.h> /* For `struct timeval'. */
  135. /* Structure which says how much of each resource has been used. */
  136. struct rusage
  137. {
  138. /* Total amount of user time used. */
  139. struct timeval ru_utime;
  140. /* Total amount of system time used. */
  141. struct timeval ru_stime;
  142. /* Maximum resident set size (in kilobytes). */
  143. long int ru_maxrss;
  144. /* Amount of sharing of text segment memory
  145. with other processes (kilobyte-seconds). */
  146. long int ru_ixrss;
  147. /* Amount of data segment memory used (kilobyte-seconds). */
  148. long int ru_idrss;
  149. /* Amount of stack memory used (kilobyte-seconds). */
  150. long int ru_isrss;
  151. /* Number of soft page faults (i.e. those serviced by reclaiming
  152. a page from the list of pages awaiting reallocation. */
  153. long int ru_minflt;
  154. /* Number of hard page faults (i.e. those that required I/O). */
  155. long int ru_majflt;
  156. /* Number of times a process was swapped out of physical memory. */
  157. long int ru_nswap;
  158. /* Number of input operations via the file system. Note: This
  159. and `ru_oublock' do not include operations with the cache. */
  160. long int ru_inblock;
  161. /* Number of output operations via the file system. */
  162. long int ru_oublock;
  163. /* Number of IPC messages sent. */
  164. long int ru_msgsnd;
  165. /* Number of IPC messages received. */
  166. long int ru_msgrcv;
  167. /* Number of signals delivered. */
  168. long int ru_nsignals;
  169. /* Number of voluntary context switches, i.e. because the process
  170. gave up the process before it had to (usually to wait for some
  171. resource to be available). */
  172. long int ru_nvcsw;
  173. /* Number of involuntary context switches, i.e. a higher priority process
  174. became runnable or the current process used up its time slice. */
  175. long int ru_nivcsw;
  176. };
  177. /* Priority limits. */
  178. #define PRIO_MIN -20 /* Minimum priority a process can have. */
  179. #define PRIO_MAX 20 /* Maximum priority a process can have. */
  180. /* The type of the WHICH argument to `getpriority' and `setpriority',
  181. indicating what flavor of entity the WHO argument specifies. */
  182. enum __priority_which
  183. {
  184. PRIO_PROCESS = 0, /* WHO is a process ID. */
  185. #define PRIO_PROCESS PRIO_PROCESS
  186. PRIO_PGRP = 1, /* WHO is a process group ID. */
  187. #define PRIO_PGRP PRIO_PGRP
  188. PRIO_USER = 2 /* WHO is a user ID. */
  189. #define PRIO_USER PRIO_USER
  190. };