resource.h 6.3 KB

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  1. /* Bit values & structures for resource limits. Linux/PPC version.
  2. Copyright (C) 1994-99, 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 = 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. RLIMIT_NLIMITS = 11,
  66. RLIM_NLIMITS = RLIMIT_NLIMITS
  67. #define RLIMIT_NLIMITS RLIMIT_NLIMITS
  68. #define RLIM_NLIMITS RLIM_NLIMITS
  69. };
  70. /* Value to indicate that there is no limit. */
  71. #ifndef __USE_FILE_OFFSET64
  72. # define RLIM_INFINITY ((unsigned long int)(~0UL))
  73. #else
  74. # define RLIM_INFINITY 0xffffffffffffffffuLL
  75. #endif
  76. #ifdef __USE_LARGEFILE64
  77. # define RLIM64_INFINITY 0xffffffffffffffffuLL
  78. #endif
  79. /* We can represent all limits. */
  80. #define RLIM_SAVED_MAX RLIM_INFINITY
  81. #define RLIM_SAVED_CUR RLIM_INFINITY
  82. /* Type for resource quantity measurement. */
  83. #ifndef __USE_FILE_OFFSET64
  84. typedef __rlim_t rlim_t;
  85. #else
  86. typedef __rlim64_t rlim_t;
  87. #endif
  88. #ifdef __USE_LARGEFILE64
  89. typedef __rlim64_t rlim64_t;
  90. #endif
  91. struct rlimit
  92. {
  93. /* The current (soft) limit. */
  94. rlim_t rlim_cur;
  95. /* The hard limit. */
  96. rlim_t rlim_max;
  97. };
  98. #ifdef __USE_LARGEFILE64
  99. struct rlimit64
  100. {
  101. /* The current (soft) limit. */
  102. rlim64_t rlim_cur;
  103. /* The hard limit. */
  104. rlim64_t rlim_max;
  105. };
  106. #endif
  107. /* Whose usage statistics do you want? */
  108. enum __rusage_who
  109. {
  110. /* The calling process. */
  111. RUSAGE_SELF = 0,
  112. #define RUSAGE_SELF RUSAGE_SELF
  113. /* All of its terminated child processes. */
  114. RUSAGE_CHILDREN = -1,
  115. #define RUSAGE_CHILDREN RUSAGE_CHILDREN
  116. /* Both. */
  117. RUSAGE_BOTH = -2
  118. #define RUSAGE_BOTH RUSAGE_BOTH
  119. };
  120. #define __need_timeval
  121. #include <bits/time.h> /* For `struct timeval'. */
  122. /* Structure which says how much of each resource has been used. */
  123. struct rusage
  124. {
  125. /* Total amount of user time used. */
  126. struct timeval ru_utime;
  127. /* Total amount of system time used. */
  128. struct timeval ru_stime;
  129. /* Maximum resident set size (in kilobytes). */
  130. long int ru_maxrss;
  131. /* Amount of sharing of text segment memory
  132. with other processes (kilobyte-seconds). */
  133. long int ru_ixrss;
  134. /* Amount of data segment memory used (kilobyte-seconds). */
  135. long int ru_idrss;
  136. /* Amount of stack memory used (kilobyte-seconds). */
  137. long int ru_isrss;
  138. /* Number of soft page faults (i.e. those serviced by reclaiming
  139. a page from the list of pages awaiting reallocation. */
  140. long int ru_minflt;
  141. /* Number of hard page faults (i.e. those that required I/O). */
  142. long int ru_majflt;
  143. /* Number of times a process was swapped out of physical memory. */
  144. long int ru_nswap;
  145. /* Number of input operations via the file system. Note: This
  146. and `ru_oublock' do not include operations with the cache. */
  147. long int ru_inblock;
  148. /* Number of output operations via the file system. */
  149. long int ru_oublock;
  150. /* Number of IPC messages sent. */
  151. long int ru_msgsnd;
  152. /* Number of IPC messages received. */
  153. long int ru_msgrcv;
  154. /* Number of signals delivered. */
  155. long int ru_nsignals;
  156. /* Number of voluntary context switches, i.e. because the process
  157. gave up the process before it had to (usually to wait for some
  158. resource to be available). */
  159. long int ru_nvcsw;
  160. /* Number of involuntary context switches, i.e. a higher priority process
  161. became runnable or the current process used up its time slice. */
  162. long int ru_nivcsw;
  163. };
  164. /* Priority limits. */
  165. #define PRIO_MIN -20 /* Minimum priority a process can have. */
  166. #define PRIO_MAX 20 /* Maximum priority a process can have. */
  167. /* The type of the WHICH argument to `getpriority' and `setpriority',
  168. indicating what flavor of entity the WHO argument specifies. */
  169. enum __priority_which
  170. {
  171. PRIO_PROCESS = 0, /* WHO is a process ID. */
  172. #define PRIO_PROCESS PRIO_PROCESS
  173. PRIO_PGRP = 1, /* WHO is a process group ID. */
  174. #define PRIO_PGRP PRIO_PGRP
  175. PRIO_USER = 2 /* WHO is a user ID. */
  176. #define PRIO_USER PRIO_USER
  177. };