resource.h 6.7 KB

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  1. /* Bit values & structures for resource limits. 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, see
  15. <http://www.gnu.org/licenses/>. */
  16. #ifndef _SYS_RESOURCE_H
  17. # error "Never use <bits/resource.h> directly; include <sys/resource.h> instead."
  18. #endif
  19. #include <bits/types.h>
  20. /* Transmute defines to enumerations. The macro re-definitions are
  21. necessary because some programs want to test for operating system
  22. features with #ifdef RUSAGE_SELF. In ISO C the reflexive
  23. definition is a no-op. */
  24. /* Kinds of resource limit. */
  25. enum __rlimit_resource
  26. {
  27. /* Per-process CPU limit, in seconds. */
  28. RLIMIT_CPU = 0,
  29. #define RLIMIT_CPU RLIMIT_CPU
  30. /* Largest file that can be created, in bytes. */
  31. RLIMIT_FSIZE = 1,
  32. #define RLIMIT_FSIZE RLIMIT_FSIZE
  33. /* Maximum size of data segment, in bytes. */
  34. RLIMIT_DATA = 2,
  35. #define RLIMIT_DATA RLIMIT_DATA
  36. /* Maximum size of stack segment, in bytes. */
  37. RLIMIT_STACK = 3,
  38. #define RLIMIT_STACK RLIMIT_STACK
  39. /* Largest core file that can be created, in bytes. */
  40. RLIMIT_CORE = 4,
  41. #define RLIMIT_CORE RLIMIT_CORE
  42. /* Largest resident set size, in bytes.
  43. This affects swapping; processes that are exceeding their
  44. resident set size will be more likely to have physical memory
  45. taken from them. */
  46. __RLIMIT_RSS = 5,
  47. #define RLIMIT_RSS __RLIMIT_RSS
  48. /* Number of open files. */
  49. RLIMIT_NOFILE = 7,
  50. __RLIMIT_OFILE = RLIMIT_NOFILE, /* BSD name for same. */
  51. #define RLIMIT_NOFILE RLIMIT_NOFILE
  52. #define RLIMIT_OFILE __RLIMIT_OFILE
  53. /* Address space limit. */
  54. RLIMIT_AS = 9,
  55. #define RLIMIT_AS RLIMIT_AS
  56. /* Number of processes. */
  57. __RLIMIT_NPROC = 6,
  58. #define RLIMIT_NPROC __RLIMIT_NPROC
  59. /* Locked-in-memory address space. */
  60. __RLIMIT_MEMLOCK = 8,
  61. #define RLIMIT_MEMLOCK __RLIMIT_MEMLOCK
  62. /* Maximum number of file locks. */
  63. __RLIMIT_LOCKS = 10,
  64. #define RLIMIT_LOCKS __RLIMIT_LOCKS
  65. /* Maximum number of pending signals. */
  66. __RLIMIT_SIGPENDING = 11,
  67. #define RLIMIT_SIGPENDING __RLIMIT_SIGPENDING
  68. /* Maximum bytes in POSIX message queues. */
  69. __RLIMIT_MSGQUEUE = 12,
  70. #define RLIMIT_MSGQUEUE __RLIMIT_MSGQUEUE
  71. /* Maximum nice priority allowed to raise to.
  72. Nice levels 19 .. -20 correspond to 0 .. 39
  73. values of this resource limit. */
  74. __RLIMIT_NICE = 13,
  75. #define RLIMIT_NICE __RLIMIT_NICE
  76. /* Maximum realtime priority allowed for non-priviledged
  77. processes. */
  78. __RLIMIT_RTPRIO = 14,
  79. #define RLIMIT_RTPRIO __RLIMIT_RTPRIO
  80. __RLIMIT_NLIMITS = 15,
  81. __RLIM_NLIMITS = __RLIMIT_NLIMITS
  82. #define RLIMIT_NLIMITS __RLIMIT_NLIMITS
  83. #define RLIM_NLIMITS __RLIM_NLIMITS
  84. };
  85. /* Value to indicate that there is no limit. */
  86. #ifndef __USE_FILE_OFFSET64
  87. # define RLIM_INFINITY ((unsigned long int)(~0UL))
  88. #else
  89. # define RLIM_INFINITY 0xffffffffffffffffuLL
  90. #endif
  91. #ifdef __USE_LARGEFILE64
  92. # define RLIM64_INFINITY 0xffffffffffffffffuLL
  93. #endif
  94. /* We can represent all limits. */
  95. #define RLIM_SAVED_MAX RLIM_INFINITY
  96. #define RLIM_SAVED_CUR RLIM_INFINITY
  97. /* Type for resource quantity measurement. */
  98. #ifndef __USE_FILE_OFFSET64
  99. typedef __rlim_t rlim_t;
  100. #else
  101. typedef __rlim64_t rlim_t;
  102. #endif
  103. #ifdef __USE_LARGEFILE64
  104. typedef __rlim64_t rlim64_t;
  105. #endif
  106. struct rlimit
  107. {
  108. /* The current (soft) limit. */
  109. rlim_t rlim_cur;
  110. /* The hard limit. */
  111. rlim_t rlim_max;
  112. };
  113. #ifdef __USE_LARGEFILE64
  114. struct rlimit64
  115. {
  116. /* The current (soft) limit. */
  117. rlim64_t rlim_cur;
  118. /* The hard limit. */
  119. rlim64_t rlim_max;
  120. };
  121. #endif
  122. /* Whose usage statistics do you want? */
  123. enum __rusage_who
  124. {
  125. /* The calling process. */
  126. RUSAGE_SELF = 0,
  127. #define RUSAGE_SELF RUSAGE_SELF
  128. /* All of its terminated child processes. */
  129. RUSAGE_CHILDREN = -1
  130. #define RUSAGE_CHILDREN RUSAGE_CHILDREN
  131. };
  132. #define __need_timeval
  133. #include <bits/time.h> /* For `struct timeval'. */
  134. /* Structure which says how much of each resource has been used. */
  135. struct rusage
  136. {
  137. /* Total amount of user time used. */
  138. struct timeval ru_utime;
  139. /* Total amount of system time used. */
  140. struct timeval ru_stime;
  141. /* Maximum resident set size (in kilobytes). */
  142. long int ru_maxrss;
  143. /* Amount of sharing of text segment memory
  144. with other processes (kilobyte-seconds). */
  145. long int ru_ixrss;
  146. /* Amount of data segment memory used (kilobyte-seconds). */
  147. long int ru_idrss;
  148. /* Amount of stack memory used (kilobyte-seconds). */
  149. long int ru_isrss;
  150. /* Number of soft page faults (i.e. those serviced by reclaiming
  151. a page from the list of pages awaiting reallocation. */
  152. long int ru_minflt;
  153. /* Number of hard page faults (i.e. those that required I/O). */
  154. long int ru_majflt;
  155. /* Number of times a process was swapped out of physical memory. */
  156. long int ru_nswap;
  157. /* Number of input operations via the file system. Note: This
  158. and `ru_oublock' do not include operations with the cache. */
  159. long int ru_inblock;
  160. /* Number of output operations via the file system. */
  161. long int ru_oublock;
  162. /* Number of IPC messages sent. */
  163. long int ru_msgsnd;
  164. /* Number of IPC messages received. */
  165. long int ru_msgrcv;
  166. /* Number of signals delivered. */
  167. long int ru_nsignals;
  168. /* Number of voluntary context switches, i.e. because the process
  169. gave up the process before it had to (usually to wait for some
  170. resource to be available). */
  171. long int ru_nvcsw;
  172. /* Number of involuntary context switches, i.e. a higher priority process
  173. became runnable or the current process used up its time slice. */
  174. long int ru_nivcsw;
  175. };
  176. /* Priority limits. */
  177. #define PRIO_MIN -20 /* Minimum priority a process can have. */
  178. #define PRIO_MAX 20 /* Maximum priority a process can have. */
  179. /* The type of the WHICH argument to `getpriority' and `setpriority',
  180. indicating what flavor of entity the WHO argument specifies. */
  181. enum __priority_which
  182. {
  183. PRIO_PROCESS = 0, /* WHO is a process ID. */
  184. #define PRIO_PROCESS PRIO_PROCESS
  185. PRIO_PGRP = 1, /* WHO is a process group ID. */
  186. #define PRIO_PGRP PRIO_PGRP
  187. PRIO_USER = 2 /* WHO is a user ID. */
  188. #define PRIO_USER PRIO_USER
  189. };