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) 1995-2018, 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
34package 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
80end System.Parameters;
81