| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT COMPILER COMPONENTS -- |
| -- -- |
| -- S Y S T E M . P A R A M E T E R S -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 1995-2013, Free Software Foundation, Inc. -- |
| -- -- |
| -- GNAT is free software; you can redistribute it and/or modify it under -- |
| -- terms of the GNU General Public License as published by the Free Soft- -- |
| -- ware Foundation; either version 3, or (at your option) any later ver- -- |
| -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- |
| -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- |
| -- or FITNESS FOR A PARTICULAR PURPOSE. -- |
| -- -- |
| -- As a special exception under Section 7 of GPL version 3, you are granted -- |
| -- additional permissions described in the GCC Runtime Library Exception, -- |
| -- version 3.1, as published by the Free Software Foundation. -- |
| -- -- |
| -- You should have received a copy of the GNU General Public License and -- |
| -- a copy of the GCC Runtime Library Exception along with this program; -- |
| -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- |
| -- <http://www.gnu.org/licenses/>. -- |
| -- -- |
| -- GNAT was originally developed by the GNAT team at New York University. -- |
| -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- This is the default (used on all native platforms) version of this package |
| |
| pragma Compiler_Unit_Warning; |
| |
| package body System.Parameters is |
| |
| ------------------------- |
| -- Adjust_Storage_Size -- |
| ------------------------- |
| |
| function Adjust_Storage_Size (Size : Size_Type) return Size_Type is |
| begin |
| if Size = Unspecified_Size then |
| return Default_Stack_Size; |
| elsif Size < Minimum_Stack_Size then |
| return Minimum_Stack_Size; |
| else |
| return Size; |
| end if; |
| end Adjust_Storage_Size; |
| |
| ------------------------ |
| -- Default_Stack_Size -- |
| ------------------------ |
| |
| function Default_Stack_Size return Size_Type is |
| Default_Stack_Size : Integer; |
| pragma Import (C, Default_Stack_Size, "__gl_default_stack_size"); |
| begin |
| if Default_Stack_Size = -1 then |
| return 2 * 1024 * 1024; |
| else |
| return Size_Type (Default_Stack_Size); |
| end if; |
| end Default_Stack_Size; |
| |
| ------------------------ |
| -- Minimum_Stack_Size -- |
| ------------------------ |
| |
| function Minimum_Stack_Size return Size_Type is |
| begin |
| -- 12K is required for stack-checking to work reliably on most platforms |
| -- when using the GCC scheme to propagate an exception in the ZCX case. |
| -- 16K is the value of PTHREAD_STACK_MIN under Linux, so is a reasonable |
| -- default. |
| |
| return 16 * 1024; |
| end Minimum_Stack_Size; |
| |
| end System.Parameters; |
