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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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