gcc/ada/libgnat/s-parame__vxworks.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 --          Copyright (C) 1995-2020, 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 --  Version used on all VxWorks targets
  33
  34 package body System.Parameters is
  35
  36    -------------------------
  37    -- Adjust_Storage_Size --
  38    -------------------------
  39
  40    function Adjust_Storage_Size (Size : Size_Type) return Size_Type is
  41    begin
  42       if Size = Unspecified_Size then
  43          return Default_Stack_Size;
  44       elsif Size < Minimum_Stack_Size then
  45          return Minimum_Stack_Size;
  46       else
  47          return Size;
  48       end if;
  49    end Adjust_Storage_Size;
  50
  51    ------------------------
  52    -- Default_Stack_Size --
  53    ------------------------
  54
  55    function Default_Stack_Size return Size_Type is
  56       Default_Stack_Size : Integer;
  57       pragma Import (C, Default_Stack_Size, "__gl_default_stack_size");
  58    begin
  59       if Default_Stack_Size = -1 then
  60          if Stack_Check_Limits then
  61             return 32 * 1024;
  62             --  Extra stack to allow for 12K exception area.
  63          else
  64             return 20 * 1024;
  65          end if;
  66       else
  67          return Size_Type (Default_Stack_Size);
  68       end if;
  69    end Default_Stack_Size;
  70
  71    ------------------------
  72    -- Minimum_Stack_Size --
  73    ------------------------
  74
  75    function Minimum_Stack_Size return Size_Type is
  76    begin
  77       return 8 * 1024;
  78    end Minimum_Stack_Size;
  79
  80 end System.Parameters;