resource/sys/resource.h

   1 /* Copyright (C) 1992,94,1996-2000,2002,2004 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   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
   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
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #ifndef _SYS_RESOURCE_H
  20 #define _SYS_RESOURCE_H 1
  21
  22 #include <features.h>
  23
  24 /* Get the system-dependent definitions of structures and bit values.  */
  25 #include <bits/resource.h>
  26
  27 #ifndef __id_t_defined
  28 typedef __id_t id_t;
  29 # define __id_t_defined
  30 #endif
  31
  32 __BEGIN_DECLS
  33
  34 /* The X/Open standard defines that all the functions below must use
  35    `int' as the type for the first argument.  When we are compiling with
  36    GNU extensions we change this slightly to provide better error
  37    checking.  */
  38 #if defined __USE_GNU && !defined __cplusplus
  39 typedef enum __rlimit_resource __rlimit_resource_t;
  40 typedef enum __rusage_who __rusage_who_t;
  41 typedef enum __priority_which __priority_which_t;
  42 #else
  43 typedef int __rlimit_resource_t;
  44 typedef int __rusage_who_t;
  45 typedef int __priority_which_t;
  46 #endif
  47
  48 /* Put the soft and hard limits for RESOURCE in *RLIMITS.
  49    Returns 0 if successful, -1 if not (and sets errno).  */
  50 #ifndef __USE_FILE_OFFSET64
  51 extern int getrlimit (__rlimit_resource_t __resource,
  52                       struct rlimit *__rlimits) __THROW;
  53 #else
  54 # ifdef __REDIRECT_NTH
  55 extern int __REDIRECT_NTH (getrlimit, (__rlimit_resource_t __resource,
  56                                        struct rlimit *__rlimits), getrlimit64);
  57 # else
  58 #  define getrlimit getrlimit64
  59 # endif
  60 #endif
  61 #ifdef __USE_LARGEFILE64
  62 extern int getrlimit64 (__rlimit_resource_t __resource,
  63                         struct rlimit64 *__rlimits) __THROW;
  64 #endif
  65
  66 /* Set the soft and hard limits for RESOURCE to *RLIMITS.
  67    Only the super-user can increase hard limits.
  68    Return 0 if successful, -1 if not (and sets errno).  */
  69 #ifndef __USE_FILE_OFFSET64
  70 extern int setrlimit (__rlimit_resource_t __resource,
  71                       __const struct rlimit *__rlimits) __THROW;
  72 #else
  73 # ifdef __REDIRECT_NTH
  74 extern int __REDIRECT_NTH (setrlimit, (__rlimit_resource_t __resource,
  75                                        __const struct rlimit *__rlimits),
  76                            setrlimit64);
  77 # else
  78 #  define setrlimit setrlimit64
  79 # endif
  80 #endif
  81 #ifdef __USE_LARGEFILE64
  82 extern int setrlimit64 (__rlimit_resource_t __resource,
  83                         __const struct rlimit64 *__rlimits) __THROW;
  84 #endif
  85
  86 /* Return resource usage information on process indicated by WHO
  87    and put it in *USAGE.  Returns 0 for success, -1 for failure.  */
  88 extern int getrusage (__rusage_who_t __who, struct rusage *__usage) __THROW;
  89
  90 /* Return the highest priority of any process specified by WHICH and WHO
  91    (see above); if WHO is zero, the current process, process group, or user
  92    (as specified by WHO) is used.  A lower priority number means higher
  93    priority.  Priorities range from PRIO_MIN to PRIO_MAX (above).  */
  94 extern int getpriority (__priority_which_t __which, id_t __who) __THROW;
  95
  96 /* Set the priority of all processes specified by WHICH and WHO (see above)
  97    to PRIO.  Returns 0 on success, -1 on errors.  */
  98 extern int setpriority (__priority_which_t __which, id_t __who, int __prio)
  99      __THROW;
 100
 101 __END_DECLS
 102
 103 #endif  /* sys/resource.h  */