gcc/ada/a-filico.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --     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      --
   6 --                                                                          --
   7 --                                B o d y                                   --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2006, 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,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, 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
  34 with System.Finalization_Implementation;
  35 package body Ada.Finalization.List_Controller is
  36
  37    package SFI renames System.Finalization_Implementation;
  38
  39    --------------
  40    -- Finalize --
  41    --------------
  42
  43    procedure Finalize (Object : in out List_Controller) is
  44       use type SFR.Finalizable_Ptr;
  45
  46       Last_Ptr : constant SFR.Finalizable_Ptr := Object.Last'Unchecked_Access;
  47
  48    begin
  49       --  First take note of the fact that finalization of this collection has
  50       --  started.
  51
  52       Object.F := SFI.Collection_Finalization_Started;
  53
  54       --  Then finalize all the objects. Note that finalization can call
  55       --  Unchecked_Deallocation on other objects in the same collection,
  56       --  which will cause them to be removed from the list if we have not
  57       --  gotten to them yet. However, allocation in the collection will raise
  58       --  Program_Error, due to the above Collection_Finalization_Started.
  59
  60       while Object.First.Next /= Last_Ptr loop
  61          SFI.Finalize_One (Object.First.Next.all);
  62       end loop;
  63    end Finalize;
  64
  65    procedure Finalize (Object : in out Simple_List_Controller) is
  66    begin
  67       SFI.Finalize_List (Object.F);
  68       Object.F := null;
  69    end Finalize;
  70
  71    ----------------
  72    -- Initialize --
  73    ----------------
  74
  75    procedure Initialize (Object : in out List_Controller) is
  76    begin
  77       Object.F          := Object.First'Unchecked_Access;
  78       Object.First.Next := Object.Last 'Unchecked_Access;
  79       Object.Last.Prev  := Object.First'Unchecked_Access;
  80    end Initialize;
  81
  82 end Ada.Finalization.List_Controller;