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Diffstat (limited to 'gcc/ada/a-filico.ads')
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diff --git a/gcc/ada/a-filico.ads b/gcc/ada/a-filico.ads new file mode 100644 index 00000000000..506d20376f4 --- /dev/null +++ b/gcc/ada/a-filico.ads @@ -0,0 +1,105 @@ +------------------------------------------------------------------------------ +-- -- +-- 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: 1.7 $ -- +-- -- +-- 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. -- +-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). -- +-- -- +------------------------------------------------------------------------------ + +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; |