nptl/sysdeps/unix/sysv/linux/bits/local_lim.h

   1 /* Minimum guaranteed maximum values for system limits.  Linux version.
   2    Copyright (C) 1993-1998,2000,2002,2003,2004 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 Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    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    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 /* The kernel header pollutes the namespace with the NR_OPEN symbol
  21    and defines LINK_MAX although filesystems have different maxima.  A
  22    similar thing is true for OPEN_MAX: the limit can be changed at
  23    runtime and therefore the macro must not be defined.  Remove this
  24    after including the header if necessary.  */
  25 #ifndef NR_OPEN
  26 # define __undef_NR_OPEN
  27 #endif
  28 #ifndef LINK_MAX
  29 # define __undef_LINK_MAX
  30 #endif
  31 #ifndef OPEN_MAX
  32 # define __undef_OPEN_MAX
  33 #endif
  34
  35 /* The kernel sources contain a file with all the needed information.  */
  36 #include <linux/limits.h>
  37
  38 /* Have to remove NR_OPEN?  */
  39 #ifdef __undef_NR_OPEN
  40 # undef NR_OPEN
  41 # undef __undef_NR_OPEN
  42 #endif
  43 /* Have to remove LINK_MAX?  */
  44 #ifdef __undef_LINK_MAX
  45 # undef LINK_MAX
  46 # undef __undef_LINK_MAX
  47 #endif
  48 /* Have to remove OPEN_MAX?  */
  49 #ifdef __undef_OPEN_MAX
  50 # undef OPEN_MAX
  51 # undef __undef_OPEN_MAX
  52 #endif
  53
  54 /* The number of data keys per process.  */
  55 #define _POSIX_THREAD_KEYS_MAX  128
  56 /* This is the value this implementation supports.  */
  57 #define PTHREAD_KEYS_MAX        1024
  58
  59 /* Controlling the iterations of destructors for thread-specific data.  */
  60 #define _POSIX_THREAD_DESTRUCTOR_ITERATIONS     4
  61 /* Number of iterations this implementation does.  */
  62 #define PTHREAD_DESTRUCTOR_ITERATIONS   _POSIX_THREAD_DESTRUCTOR_ITERATIONS
  63
  64 /* The number of threads per process.  */
  65 #define _POSIX_THREAD_THREADS_MAX       64
  66 /* We have no predefined limit on the number of threads.  */
  67 #undef PTHREAD_THREADS_MAX
  68
  69 /* Maximum amount by which a process can descrease its asynchronous I/O
  70    priority level.  */
  71 #define AIO_PRIO_DELTA_MAX      20
  72
  73 /* Minimum size for a thread.  We are free to choose a reasonable value.  */
  74 #define PTHREAD_STACK_MIN       16384
  75
  76 /* Maximum number of timer expiration overruns.  */
  77 #define DELAYTIMER_MAX  2147483647
  78
  79 /* Maximum tty name length.  */
  80 #define TTY_NAME_MAX            32
  81
  82 /* Maximum login name length.  This is arbitrary.  */
  83 #define LOGIN_NAME_MAX          256
  84
  85 /* Maximum host name length.  */
  86 #define HOST_NAME_MAX           64
  87
  88 /* Maximum message queue priority level.  */
  89 #define MQ_PRIO_MAX             32768