------------------------------------------------------------------------------
--                                                                          --
--                            Matreshka Project                             --
--                                                                          --
--                               XML Processor                              --
--                                                                          --
--                        Runtime Library Component                         --
--                                                                          --
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--                                                                          --
-- Copyright © 2011, Vadim Godunko <vgodunko@gmail.com>                     --
-- All rights reserved.                                                     --
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-- Redistribution and use in source and binary forms, with or without       --
-- modification, are permitted provided that the following conditions       --
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--  * Redistributions of source code must retain the above copyright        --
--    notice, this list of conditions and the following disclaimer.         --
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--  * Neither the name of the Vadim Godunko, IE nor the names of its        --
--    contributors may be used to endorse or promote products derived from  --
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-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS      --
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--  $Revision: 2135 $ $Date: 2011-10-09 23:01:29 +0400 (Sun, 09 Oct 2011) $
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with Ada.Unchecked_Deallocation;

package body Matreshka.Internals.SAX_Locators is

   -----------------
   -- Dereference --
   -----------------

   procedure Dereference (Self : in out Shared_Locator_Access) is
      procedure Free is
        new Ada.Unchecked_Deallocation
             (Shared_Abstract_Locator'Class, Shared_Locator_Access);

   begin
      if Matreshka.Atomics.Counters.Decrement (Self.Counter) then
         Free (Self);

      else
         Self := null;
      end if;
   end Dereference;

   ---------------
   -- Reference --
   ---------------

   procedure Reference (Self : not null Shared_Locator_Access) is
   begin
      Matreshka.Atomics.Counters.Increment (Self.Counter);
   end Reference;

end Matreshka.Internals.SAX_Locators;
