resource/sys/resource.h

   1 /* Copyright (C) 1992,94,1996-2000,2002,2004,2012
   2    Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   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
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #ifndef _SYS_RESOURCE_H
  21 #define _SYS_RESOURCE_H 1
  22
  23 #include <features.h>
  24
  25 /* Get the system-dependent definitions of structures and bit values.  */
  26 #include <bits/resource.h>
  27
  28 #ifndef __id_t_defined
  29 typedef __id_t id_t;
  30 # define __id_t_defined
  31 #endif
  32
  33 __BEGIN_DECLS
  34
  35 /* The X/Open standard defines that all the functions below must use
  36    `int' as the type for the first argument.  When we are compiling with
  37    GNU extensions we change this slightly to provide better error
  38    checking.  */
  39 #if defined __USE_GNU && !defined __cplusplus
  40 typedef enum __rlimit_resource __rlimit_resource_t;
  41 typedef enum __rusage_who __rusage_who_t;
  42 typedef enum __priority_which __priority_which_t;
  43 #else
  44 typedef int __rlimit_resource_t;
  45 typedef int __rusage_who_t;
  46 typedef int __priority_which_t;
  47 #endif
  48
  49 /* Put the soft and hard limits for RESOURCE in *RLIMITS.
  50    Returns 0 if successful, -1 if not (and sets errno).  */
  51 #ifndef __USE_FILE_OFFSET64
  52 extern int getrlimit (__rlimit_resource_t __resource,
  53                       struct rlimit *__rlimits) __THROW;
  54 #else
  55 # ifdef __REDIRECT_NTH
  56 extern int __REDIRECT_NTH (getrlimit, (__rlimit_resource_t __resource,
  57                                        struct rlimit *__rlimits), getrlimit64);
  58 # else
  59 #  define getrlimit getrlimit64
  60 # endif
  61 #endif
  62 #ifdef __USE_LARGEFILE64
  63 extern int getrlimit64 (__rlimit_resource_t __resource,
  64                         struct rlimit64 *__rlimits) __THROW;
  65 #endif
  66
  67 /* Set the soft and hard limits for RESOURCE to *RLIMITS.
  68    Only the super-user can increase hard limits.
  69    Return 0 if successful, -1 if not (and sets errno).  */
  70 #ifndef __USE_FILE_OFFSET64
  71 extern int setrlimit (__rlimit_resource_t __resource,
  72                       const struct rlimit *__rlimits) __THROW;
  73 #else
  74 # ifdef __REDIRECT_NTH
  75 extern int __REDIRECT_NTH (setrlimit, (__rlimit_resource_t __resource,
  76                                        const struct rlimit *__rlimits),
  77                            setrlimit64);
  78 # else
  79 #  define setrlimit setrlimit64
  80 # endif
  81 #endif
  82 #ifdef __USE_LARGEFILE64
  83 extern int setrlimit64 (__rlimit_resource_t __resource,
  84                         const struct rlimit64 *__rlimits) __THROW;
  85 #endif
  86
  87 /* Return resource usage information on process indicated by WHO
  88    and put it in *USAGE.  Returns 0 for success, -1 for failure.  */
  89 extern int getrusage (__rusage_who_t __who, struct rusage *__usage) __THROW;
  90
  91 /* Return the highest priority of any process specified by WHICH and WHO
  92    (see above); if WHO is zero, the current process, process group, or user
  93    (as specified by WHO) is used.  A lower priority number means higher
  94    priority.  Priorities range from PRIO_MIN to PRIO_MAX (above).  */
  95 extern int getpriority (__priority_which_t __which, id_t __who) __THROW;
  96
  97 /* Set the priority of all processes specified by WHICH and WHO (see above)
  98    to PRIO.  Returns 0 on success, -1 on errors.  */
  99 extern int setpriority (__priority_which_t __which, id_t __who, int __prio)
 100      __THROW;
 101
 102 __END_DECLS
 103
 104 #endif  /* sys/resource.h  */