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) 1992-2009, 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 3,  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.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 with System.Finalization_Implementation;
  33 package body Ada.Finalization.List_Controller is
  34
  35    package SFI renames System.Finalization_Implementation;
  36
  37    --------------
  38    -- Finalize --
  39    --------------
  40
  41    procedure Finalize (Object : in out List_Controller) is
  42       use type SFR.Finalizable_Ptr;
  43
  44       Last_Ptr : constant SFR.Finalizable_Ptr := Object.Last'Unchecked_Access;
  45
  46    begin
  47       --  First take note of the fact that finalization of this collection has
  48       --  started.
  49
  50       Object.F := SFI.Collection_Finalization_Started;
  51
  52       --  Then finalize all the objects. Note that finalization can call
  53       --  Unchecked_Deallocation on other objects in the same collection,
  54       --  which will cause them to be removed from the list if we have not
  55       --  gotten to them yet. However, allocation in the collection will raise
  56       --  Program_Error, due to the above Collection_Finalization_Started.
  57
  58       while Object.First.Next /= Last_Ptr loop
  59          SFI.Finalize_One (Object.First.Next.all);
  60       end loop;
  61    end Finalize;
  62
  63    procedure Finalize (Object : in out Simple_List_Controller) is
  64    begin
  65       SFI.Finalize_List (Object.F);
  66       Object.F := null;
  67    end Finalize;
  68
  69    ----------------
  70    -- Initialize --
  71    ----------------
  72
  73    procedure Initialize (Object : in out List_Controller) is
  74    begin
  75       Object.F          := Object.First'Unchecked_Access;
  76       Object.First.Next := Object.Last 'Unchecked_Access;
  77       Object.Last.Prev  := Object.First'Unchecked_Access;
  78    end Initialize;
  79
  80 end Ada.Finalization.List_Controller;