+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- A D A . F I N A L I Z A T I O N . L I S T _ C O N T R O L L E R --
--- --
--- B o d y --
--- --
--- $Revision: 1.1.16.2 $
--- --
--- Copyright (C) 1992-1997 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 2, 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. See the GNU General Public License --
--- for more details. You should have received a copy of the GNU General --
--- Public License distributed with GNAT; see file COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
--- --
--- As a special exception, if other files instantiate generics from this --
--- unit, or you link this unit with other files to produce an executable, --
--- this unit does not by itself cause the resulting executable to be --
--- covered by the GNU General Public License. This exception does not --
--- however invalidate any other reasons why the executable file might be --
--- covered by the GNU Public License. --
--- --
--- GNAT was originally developed by the GNAT team at New York University. --
--- Extensive contributions were provided by Ada Core Technologies Inc. --
--- --
-------------------------------------------------------------------------------
-
-with System.Finalization_Root;
-package Ada.Finalization.List_Controller is
-pragma Elaborate_Body (List_Controller);
-
- package SFR renames System.Finalization_Root;
-
- ----------------------------
- -- Simple_List_Controller --
- ----------------------------
-
- type Simple_List_Controller is new Ada.Finalization.Limited_Controlled
- with record
- F : SFR.Finalizable_Ptr;
- end record;
- -- Used by the compiler to carry a list of temporary objects that
- -- needs to be finalized after having being used. This list is
- -- embedded in a controlled type so that if an exception is raised
- -- while those temporaries are still in use, they will be reclaimed
- -- by the normal finalization mechanism.
-
- procedure Finalize (Object : in out Simple_List_Controller);
-
- ---------------------
- -- List_Controller --
- ---------------------
-
- -- Management of a bidirectional linked heterogenous list of
- -- dynamically Allocated objects. To simplify the management of the
- -- linked list, the First and Last elements are statically part of the
- -- original List controller:
- --
- -- +------------+
- -- | --|-->--
- -- +------------+
- -- |--<-- | record with ctrl components
- -- |------------| +----------+
- -- +--|-- L | | |
- -- | |------------| | |
- -- | |+--------+ | +--------+ |+--------+|
- -- +->|| prev | F|---<---|-- |----<---||-- ||--<--+
- -- ||--------| i| |--------| ||--------|| |
- -- || next | r|--->---| --|---->---|| --||--------+
- -- |+--------+ s| |--------| ||--------|| | |
- -- | t| | ctrl | || || | |
- -- | | : : |+--------+| | |
- -- | | : object : |rec | | |
- -- | | : : |controller| | |
- -- | | | | | | | v
- -- |+--------+ | +--------+ +----------+ | |
- -- || prev -|-L|--------------------->--------------------+ |
- -- ||--------| a| |
- -- || next | s|-------------------<-------------------------+
- -- |+--------+ t|
- -- | |
- -- +------------+
-
- type List_Controller is new Ada.Finalization.Limited_Controlled
- with record
- F : SFR.Finalizable_Ptr;
- First,
- Last : aliased SFR.Root_Controlled;
- end record;
- -- Controls the chains of dynamically allocated controlled
- -- objects makes sure that they get finalized upon exit from
- -- the access type that defined them
-
- procedure Initialize (Object : in out List_Controller);
- procedure Finalize (Object : in out List_Controller);
-
-end Ada.Finalization.List_Controller;
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