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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [ada/] [s-parame.adb] - Blame information for rev 281

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1 281 jeremybenn
------------------------------------------------------------------------------
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--                                                                          --
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--                         GNAT COMPILER COMPONENTS                         --
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--                                                                          --
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--                    S Y S T E M . P A R A M E T E R S                     --
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--                                                                          --
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--                                 B o d y                                  --
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--                                                                          --
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--          Copyright (C) 1995-2009, Free Software Foundation, Inc.         --
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--                                                                          --
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-- GNAT is free software;  you can  redistribute it  and/or modify it under --
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-- terms of the  GNU General Public License as published  by the Free Soft- --
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-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
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-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
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--                                                                          --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception,   --
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-- version 3.1, as published by the Free Software Foundation.               --
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--                                                                          --
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-- You should have received a copy of the GNU General Public License and    --
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-- a copy of the GCC Runtime Library Exception along with this program;     --
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-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
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-- <http://www.gnu.org/licenses/>.                                          --
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--                                                                          --
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-- GNAT was originally developed  by the GNAT team at  New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc.      --
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--                                                                          --
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------------------------------------------------------------------------------
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--  This is the default (used on all native platforms) version of this package
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pragma Compiler_Unit;
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package body System.Parameters is
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   -------------------------
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   -- Adjust_Storage_Size --
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   -------------------------
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   function Adjust_Storage_Size (Size : Size_Type) return Size_Type is
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   begin
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      if Size = Unspecified_Size then
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         return Default_Stack_Size;
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      elsif Size < Minimum_Stack_Size then
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         return Minimum_Stack_Size;
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      else
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         return Size;
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      end if;
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   end Adjust_Storage_Size;
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   ------------------------
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   -- Default_Stack_Size --
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   ------------------------
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   function Default_Stack_Size return Size_Type is
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      Default_Stack_Size : Integer;
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      pragma Import (C, Default_Stack_Size, "__gl_default_stack_size");
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   begin
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      if Default_Stack_Size = -1 then
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         return 2 * 1024 * 1024;
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      else
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         return Size_Type (Default_Stack_Size);
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      end if;
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   end Default_Stack_Size;
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   ------------------------
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   -- Minimum_Stack_Size --
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   ------------------------
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   function Minimum_Stack_Size return Size_Type is
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   begin
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      --  12K is required for stack-checking to work reliably on most platforms
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      --  when using the GCC scheme to propagate an exception in the ZCX case.
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      --  16K is the value of PTHREAD_STACK_MIN under Linux, so is a reasonable
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      --  default.
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      return 16 * 1024;
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   end Minimum_Stack_Size;
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end System.Parameters;

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