gcc/ada/5oparame.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                    S Y S T E M . P A R A M E T E R S                     --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --                                                                          --
  10 --          Copyright (C) 1997-1998 Free Software Foundation, Inc.          --
  11 --                                                                          --
  12 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  13 -- terms of the  GNU General Public License as published  by the Free Soft- --
  14 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  15 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  16 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  17 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  18 -- for  more details.  You should have  received  a copy of the GNU General --
  19 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  20 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  21 -- MA 02111-1307, USA.                                                      --
  22 --                                                                          --
  23 -- As a special exception,  if other files  instantiate  generics from this --
  24 -- unit, or you link  this unit with other files  to produce an executable, --
  25 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  26 -- covered  by the  GNU  General  Public  License.  This exception does not --
  27 -- however invalidate  any other reasons why  the executable file  might be --
  28 -- covered by the  GNU Public License.                                      --
  29 --                                                                          --
  30 -- GNAT was originally developed  by the GNAT team at  New York University. --
  31 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 --  This is the OS/2 specific version - default stacksizes need to be large
  36
  37 package body System.Parameters is
  38
  39    ------------------------
  40    -- Default_Stack_Size --
  41    ------------------------
  42
  43    function Default_Stack_Size return Size_Type is
  44    begin
  45       --  The default stack size for extra tasks is based on the
  46       --  default stack size for the main task (8 MB) and for the heap
  47       --  (32 MB).
  48
  49       --  In OS/2 it doesn't hurt to define large stacks, unless
  50       --  the system is configured to commit all memory reservations.
  51       --  This is not a default configuration however.
  52
  53       return 1024 * 1024;
  54    end Default_Stack_Size;
  55
  56    ------------------------
  57    -- Minimum_Stack_Size --
  58    ------------------------
  59
  60    function Minimum_Stack_Size return Size_Type is
  61    begin
  62       --  System functions may need 8 kB of stack, so 12 kB seems a
  63       --  good minimum.
  64       return 12 * 1024;
  65    end Minimum_Stack_Size;
  66
  67    -------------------------
  68    -- Adjust_Storage_Size --
  69    -------------------------
  70
  71    function Adjust_Storage_Size (Size : Size_Type) return Size_Type is
  72    begin
  73       if Size = Unspecified_Size then
  74          return Default_Stack_Size;
  75
  76       elsif Size < Minimum_Stack_Size then
  77          return Minimum_Stack_Size;
  78
  79       else
  80          return Size;
  81       end if;
  82    end Adjust_Storage_Size;
  83
  84 end System.Parameters;