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[/] [openrisc/] [tags/] [gnu-src/] [gcc-4.5.1/] [gcc-4.5.1-or32-1.0rc3/] [gcc/] [ada/] [s-finroo.ads] - Rev 593
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------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- S Y S T E M . F I N A L I Z A T I O N _ R O O T -- -- -- -- S p e c -- -- -- -- Copyright (C) 1992-2009, 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 unit provides the basic support for controlled (finalizable) types with Ada.Streams; with Ada.Unchecked_Conversion; package System.Finalization_Root is pragma Preelaborate; type Root_Controlled is tagged; type Finalizable_Ptr is access all Root_Controlled'Class; function To_Finalizable_Ptr is new Ada.Unchecked_Conversion (Address, Finalizable_Ptr); function To_Addr is new Ada.Unchecked_Conversion (Finalizable_Ptr, Address); type Empty_Root_Controlled is abstract tagged null record; -- Just for the sake of Controlled equality (see Ada.Finalization) type Root_Controlled is new Empty_Root_Controlled with record Prev, Next : Finalizable_Ptr; end record; subtype Finalizable is Root_Controlled'Class; procedure Initialize (Object : in out Root_Controlled); procedure Finalize (Object : in out Root_Controlled); procedure Adjust (Object : in out Root_Controlled); -- Stream-oriented attributes for Root_Controlled. These must be empty so -- as to not copy the finalization chain pointers. They are declared in -- a nested package so that they do not create primitive operations of -- Root_Controlled. Otherwise this would add unwanted primitives to (the -- full view of) Ada.Finalization.Limited_Controlled, which would cause -- trouble in cases where a limited controlled type is used as the -- designated type of a remote access-to-classwide type. package Stream_Attributes is procedure Write (Stream : not null access Ada.Streams.Root_Stream_Type'Class; Item : Root_Controlled) is null; procedure Read (Stream : not null access Ada.Streams.Root_Stream_Type'Class; Item : out Root_Controlled) is null; end Stream_Attributes; for Root_Controlled'Read use Stream_Attributes.Read; for Root_Controlled'Write use Stream_Attributes.Write; end System.Finalization_Root;
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