gcc/ada/5gproinf.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 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 2,  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.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  19 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  20 -- MA 02111-1307, USA.                                                      --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNAT was originally developed  by the GNAT team at  New York University. --
  30 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33 --  This package contains the definitions and routines used as parameters
  34 --  to the run-time system at program startup for the SGI implementation.
  35
  36 package System.Program_Info is
  37
  38    function Initial_Sproc_Count return Integer;
  39    --
  40    --  The number of sproc created at program startup for scheduling
  41    --  threads.
  42    --
  43
  44    function Max_Sproc_Count     return Integer;
  45    --
  46    --  The maximum number of sprocs that can be created by the program
  47    --  for servicing threads.  This limit includes both the pre-created
  48    --  sprocs and those explicitly created under program control.
  49    --
  50
  51    function Sproc_Stack_Size    return Integer;
  52    --
  53    --  The size, in bytes, of the sproc's initial stack.
  54    --
  55
  56    function Default_Time_Slice  return Duration;
  57    --
  58    --  The default time quanta for round-robin scheduling of threads of
  59    --  equal priority.  This default value can be overridden on a per-task
  60    --  basis by specifying an alternate value via the implementation-defined
  61    --  Task_Info pragma. See s-tasinf.ads for more information.
  62    --
  63
  64    function Default_Task_Stack  return Integer;
  65    --
  66    --  The default stack size for each created thread.  This default value
  67    --  can be overriden on a per-task basis by the language-defined
  68    --  Storage_Size pragma.
  69    --
  70
  71    function Stack_Guard_Pages   return Integer;
  72    --
  73    --  The number of non-writable, guard pages to append to the bottom of
  74    --  each thread's stack.
  75    --
  76
  77    function Pthread_Sched_Signal return Integer;
  78    --
  79    --  The signal used by the Pthreads library to affect scheduling actions
  80    --  in remote sprocs.
  81    --
  82
  83    function Pthread_Arena_Size  return Integer;
  84    --
  85    --  The size of the shared arena from which pthread locks are allocated.
  86    --  See the usinit(3p) man page for more information on shared arenas.
  87    --
  88
  89    function Os_Default_Priority return Integer;
  90    --
  91    --  The default Irix Non-Degrading priority for each sproc created to
  92    --  service threads.
  93    --
  94
  95 end System.Program_Info;