------------------------------------------------------------------------------
------------------------------------------------------------------------------
-- Cheddar is a GNU GPL real-time scheduling analysis tool.
-- This program provides services to automatically check schedulability and
-- other performance criteria of real-time architecture models.
--
-- Copyright (C) 2002-2020, Frank Singhoff, Alain Plantec, Jerome Legrand,
--                          Hai Nam Tran, Stephane Rubini
--
-- The Cheddar project was started in 2002 by
-- Frank Singhoff, Lab-STICC UMR 6285, Université de Bretagne Occidentale
--
-- Cheddar has been published in the "Agence de Protection des Programmes/France" in 2008.
-- Since 2008, Ellidiss technologies also contributes to the development of
-- Cheddar and provides industrial support.
--
-- The full list of contributors and sponsors can be found in AUTHORS.txt and SPONSORS.txt
--
-- This program is free software; you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation; either version 2 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT 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
-- along with this program; if not, write to the Free Software
-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
--
--
-- Contact : cheddar@listes.univ-brest.fr
--
------------------------------------------------------------------------------
-- Last update :
--    $Rev$
--    $Date$
--    $Author: singhoff $
------------------------------------------------------------------------------
------------------------------------------------------------------------------

with Text_IO;               use Text_IO;
with Ada.Strings.Unbounded; use Ada.Strings.Unbounded;

with Unchecked_Deallocation;

package id_generators is

   type id_value_type is new Integer range 0 .. Integer'last;

   type id_kind_type is (bounded_value_type, unbounded_value_type);

   type id is record
      value : id_value_type := id_value_type'first;
      kind  : id_kind_type  := bounded_value_type;
   end record;

   package id_value_type_io is new Integer_IO (id_value_type);
   use id_value_type_io;
   package id_kind_type_io is new Enumeration_IO (id_kind_type);
   use id_kind_type_io;

   type id_ptr is access id;

   exceeded_id_value : exception;

   -- Display an id
   --
   procedure put (e : in id);
   procedure put (e : in id_ptr);

   -- Initialize an id
   --
   procedure initialize (a : out id);

   -- Free memory
   --
   procedure free is new Unchecked_Deallocation (id, id_ptr);

   -- Generate a unique value from an id
   --
   procedure generate_id (an_id : in out id; current_id : out id_value_type);
   procedure generate_id
     (an_id      : in out id;
      current_id :    out Unbounded_String);

end id_generators;