1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT COMPILER COMPONENTS                         --
4--                                                                          --
5--                S Y S T E M . F I N A L I Z A T I O N _ R O O T           --
6--                                                                          --
7--                                 S p e c                                  --
8--                                                                          --
9--            Copyright (C) 1992-2003 Free Software Foundation, Inc.        --
10--                                                                          --
11-- GNAT is free software;  you can  redistribute it  and/or modify it under --
12-- terms of the  GNU General Public License as published  by the Free Soft- --
13-- ware  Foundation;  either version 2,  or (at your option) any later ver- --
14-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
15-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
16-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
17-- for  more details.  You should have  received  a copy of the GNU General --
18-- Public License  distributed with GNAT;  see file COPYING.  If not, write --
19-- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
20-- MA 02111-1307, USA.                                                      --
21--                                                                          --
22-- As a special exception,  if other files  instantiate  generics from this --
23-- unit, or you link  this unit with other files  to produce an executable, --
24-- this  unit  does not  by itself cause  the resulting  executable  to  be --
25-- covered  by the  GNU  General  Public  License.  This exception does not --
26-- however invalidate  any other reasons why  the executable file  might be --
27-- covered by the  GNU Public License.                                      --
28--                                                                          --
29-- GNAT was originally developed  by the GNAT team at  New York University. --
30-- Extensive contributions were provided by Ada Core Technologies Inc.      --
31--                                                                          --
32------------------------------------------------------------------------------
33
34with Ada.Streams;
35package System.Finalization_Root is
36pragma Preelaborate (Finalization_Root);
37
38   type Root_Controlled;
39
40   type Finalizable_Ptr is access all Root_Controlled'Class;
41
42   type Empty_Root_Controlled is abstract tagged null record;
43   --  Just for the sake of Controlled equality (see Ada.Finalization)
44
45   type Root_Controlled is new Empty_Root_Controlled with record
46      Prev, Next : Finalizable_Ptr;
47   end record;
48   subtype Finalizable is Root_Controlled'Class;
49
50   procedure Initialize (Object : in out Root_Controlled);
51   procedure Finalize   (Object : in out Root_Controlled);
52   procedure Adjust     (Object : in out Root_Controlled);
53
54   procedure Write     (Stream : access Ada.Streams.Root_Stream_Type'Class;
55                        Item : in Root_Controlled);
56   procedure Read      (Stream : access Ada.Streams.Root_Stream_Type'Class;
57                        Item : out Root_Controlled);
58
59   for Root_Controlled'Read use Read;
60   for Root_Controlled'Write use Write;
61end System.Finalization_Root;
62