------------------------------------------------------------------------------
--                                                                          --
--                         GNAT LIBRARY COMPONENTS                          --
--                                                                          --
--       A D A . C O N T A I N E R S . R E D _ B L A C K _ T R E E S        --
--                                                                          --
--                                 S p e c                                  --
--                                                                          --
--          Copyright (C) 2004-2006, 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,  51  Franklin  Street,  Fifth  Floor, --
-- Boston, MA 02110-1301, USA.                                              --
--                                                                          --
--                                                                          --
--                                                                          --
--                                                                          --
--                                                                          --
--                                                                          --
--                                                                          --
--                                                                          --
--                                                                          --
-- This unit was originally developed by Matthew J Heaney.                  --
------------------------------------------------------------------------------

--  This package declares the tree type used to implement ordered containers

package Ada.Containers.Red_Black_Trees is
   pragma Pure;

   type Color_Type is (Red, Black);

   generic
      type Node_Type (<>) is limited private;
      type Node_Access is access Node_Type;
   package Generic_Tree_Types is
      type Tree_Type is tagged record
         First  : Node_Access;
         Last   : Node_Access;
         Root   : Node_Access;
         Length : Count_Type := 0;
         Busy   : Natural := 0;
         Lock   : Natural := 0;
      end record;
   end Generic_Tree_Types;

end Ada.Containers.Red_Black_Trees;
