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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /gcc/ada/s-parame.adb | |
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Diffstat (limited to 'gcc/ada/s-parame.adb')
-rw-r--r-- | gcc/ada/s-parame.adb | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/gcc/ada/s-parame.adb b/gcc/ada/s-parame.adb new file mode 100644 index 000000000..ff61b7ee5 --- /dev/null +++ b/gcc/ada/s-parame.adb @@ -0,0 +1,82 @@ +------------------------------------------------------------------------------ +-- -- +-- 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) 1995-2009, 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; + +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; |