gcc/ada/s-proinf-irix-athread.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                 S Y S T E M . P R O G R A M  _  I N F O                  --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1997-2009, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 --  This package contains the definitions and routines used as parameters to
  33 --  the run-time system at program startup for the SGI implementation.
  34
  35 package System.Program_Info is
  36    pragma Preelaborate;
  37
  38    function Initial_Sproc_Count return Integer;
  39    --  The number of sproc created at program startup for scheduling threads
  40
  41    function Max_Sproc_Count return Integer;
  42    --  The maximum number of sprocs that can be created by the program for
  43    --  servicing threads. This limit includes both the pre-created sprocs and
  44    --  those explicitly created under program control.
  45
  46    function Sproc_Stack_Size return Integer;
  47    --  The size, in bytes, of the sproc's initial stack
  48
  49    function Default_Time_Slice  return Duration;
  50    --  The default time quanta for round-robin scheduling of threads of
  51    --  equal priority.  This default value can be overridden on a per-task
  52    --  basis by specifying an alternate value via the implementation-defined
  53    --  Task_Info pragma. See s-tasinf.ads for more information.
  54
  55    function Default_Task_Stack return Integer;
  56    --  The default stack size for each created thread. This default value can
  57    --  be overridden on a per-task basis by the language-defined Storage_Size
  58    --  pragma.
  59
  60    function Stack_Guard_Pages return Integer;
  61    --  The number of non-writable, guard pages to append to the bottom of
  62    --  each thread's stack.
  63
  64    function Pthread_Sched_Signal return Integer;
  65    --  The signal used by the Pthreads library to affect scheduling actions
  66    --  in remote sprocs.
  67
  68    function Pthread_Arena_Size return Integer;
  69    --  The size of the shared arena from which pthread locks are allocated.
  70    --  See the usinit(3p) man page for more information on shared arenas.
  71
  72    function Os_Default_Priority return Integer;
  73    --  The default Irix Non-Degrading priority for each sproc created to
  74    --  service threads.
  75
  76 end System.Program_Info;