resource.h 6.2 KB

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  1. /* Bit values & structures for resource limits. Alpha/Linux version.
  2. Copyright (C) 1994,96,97,98,99,2000 Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Lesser General Public
  6. License as published by the Free Software Foundation; either
  7. version 2.1 of the License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, write to the Free
  14. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  15. 02111-1307 USA. */
  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 = 6,
  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 = 7,
  55. #define RLIMIT_AS RLIMIT_AS
  56. /* Number of processes. */
  57. RLIMIT_NPROC = 8,
  58. #define RLIMIT_NPROC RLIMIT_NPROC
  59. /* Locked-in-memory address space. */
  60. RLIMIT_MEMLOCK = 9,
  61. #define RLIMIT_MEMLOCK RLIMIT_MEMLOCK
  62. /* Maximum number of file locks. */
  63. RLIMIT_LOCKS = 10,
  64. #define RLIMIT_LOCKS RLIMIT_LOCKS
  65. RLIM_NLIMITS = 11
  66. #define RLIMIT_NLIMITS RLIMIT_NLIMITS
  67. #define RLIM_NLIMITS RLIM_NLIMITS
  68. };
  69. /* Value to indicate that there is no limit. */
  70. #ifndef __USE_FILE_OFFSET64
  71. # define RLIM_INFINITY ((long int)(~0UL >> 1))
  72. #else
  73. # define RLIM_INFINITY 0x7fffffffffffffffLL
  74. #endif
  75. #ifdef __USE_LARGEFILE64
  76. # define RLIM64_INFINITY 0x7fffffffffffffffLL
  77. #endif
  78. /* We can represent all limits. */
  79. #define RLIM_SAVED_MAX RLIM_INFINITY
  80. #define RLIM_SAVED_CUR RLIM_INFINITY
  81. /* Type for resource quantity measurement. */
  82. #ifndef __USE_FILE_OFFSET64
  83. typedef __rlim_t rlim_t;
  84. #else
  85. typedef __rlim64_t rlim_t;
  86. #endif
  87. #ifdef __USE_LARGEFILE64
  88. typedef __rlim64_t rlim64_t;
  89. #endif
  90. struct rlimit
  91. {
  92. /* The current (soft) limit. */
  93. rlim_t rlim_cur;
  94. /* The hard limit. */
  95. rlim_t rlim_max;
  96. };
  97. #ifdef __USE_LARGEFILE64
  98. struct rlimit64
  99. {
  100. /* The current (soft) limit. */
  101. rlim64_t rlim_cur;
  102. /* The hard limit. */
  103. rlim64_t rlim_max;
  104. };
  105. #endif
  106. /* Whose usage statistics do you want? */
  107. enum __rusage_who
  108. {
  109. /* The calling process. */
  110. RUSAGE_SELF = 0,
  111. #define RUSAGE_SELF RUSAGE_SELF
  112. /* All of its terminated child processes. */
  113. RUSAGE_CHILDREN = -1,
  114. #define RUSAGE_CHILDREN RUSAGE_CHILDREN
  115. /* Both. */
  116. RUSAGE_BOTH = -2
  117. #define RUSAGE_BOTH RUSAGE_BOTH
  118. };
  119. #define __need_timeval
  120. #include <bits/time.h> /* For `struct timeval'. */
  121. /* Structure which says how much of each resource has been used. */
  122. struct rusage
  123. {
  124. /* Total amount of user time used. */
  125. struct timeval ru_utime;
  126. /* Total amount of system time used. */
  127. struct timeval ru_stime;
  128. /* Maximum resident set size (in kilobytes). */
  129. long int ru_maxrss;
  130. /* Amount of sharing of text segment memory
  131. with other processes (kilobyte-seconds). */
  132. long int ru_ixrss;
  133. /* Amount of data segment memory used (kilobyte-seconds). */
  134. long int ru_idrss;
  135. /* Amount of stack memory used (kilobyte-seconds). */
  136. long int ru_isrss;
  137. /* Number of soft page faults (i.e. those serviced by reclaiming
  138. a page from the list of pages awaiting reallocation. */
  139. long int ru_minflt;
  140. /* Number of hard page faults (i.e. those that required I/O). */
  141. long int ru_majflt;
  142. /* Number of times a process was swapped out of physical memory. */
  143. long int ru_nswap;
  144. /* Number of input operations via the file system. Note: This
  145. and `ru_oublock' do not include operations with the cache. */
  146. long int ru_inblock;
  147. /* Number of output operations via the file system. */
  148. long int ru_oublock;
  149. /* Number of IPC messages sent. */
  150. long int ru_msgsnd;
  151. /* Number of IPC messages received. */
  152. long int ru_msgrcv;
  153. /* Number of signals delivered. */
  154. long int ru_nsignals;
  155. /* Number of voluntary context switches, i.e. because the process
  156. gave up the process before it had to (usually to wait for some
  157. resource to be available). */
  158. long int ru_nvcsw;
  159. /* Number of involuntary context switches, i.e. a higher priority process
  160. became runnable or the current process used up its time slice. */
  161. long int ru_nivcsw;
  162. };
  163. /* Priority limits. */
  164. #define PRIO_MIN -20 /* Minimum priority a process can have. */
  165. #define PRIO_MAX 20 /* Maximum priority a process can have. */
  166. /* The type of the WHICH argument to `getpriority' and `setpriority',
  167. indicating what flavor of entity the WHO argument specifies. */
  168. enum __priority_which
  169. {
  170. PRIO_PROCESS = 0, /* WHO is a process ID. */
  171. #define PRIO_PROCESS PRIO_PROCESS
  172. PRIO_PGRP = 1, /* WHO is a process group ID. */
  173. #define PRIO_PGRP PRIO_PGRP
  174. PRIO_USER = 2 /* WHO is a user ID. */
  175. #define PRIO_USER PRIO_USER
  176. };