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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 1991-2010 OpenCFD Ltd.
     \\/     M anipulation  |
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.

    OpenFOAM 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 3 of the License, or
    (at your option) any later version.

    OpenFOAM 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 OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.

Class
    Foam::Callback

Description
    Abstract class to handle automatic call-back registration with the
    CallbackRegistry.  Derive from this class and extend by adding the
    appropriate callback functions.

SourceFiles
    Callback.C

\*---------------------------------------------------------------------------*/

#ifndef Callback_H
#define Callback_H

#include <OpenFOAM/CallbackRegistry.H>

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

namespace Foam
{

/*---------------------------------------------------------------------------*\
                           Class Callback Declaration
\*---------------------------------------------------------------------------*/

template<class CallbackType>
class Callback
:
    public CallbackRegistry<CallbackType>::link
{
    // Private data

        //- CallbackRegistry reference
        CallbackRegistry<CallbackType>& cbr_;


    // Private Member Functions

        //- Disallow default bitwise assignment
        void operator=(const Callback<CallbackType>&);


public:

    // Constructors

        //- Construct and register with CallbackRegistry
        Callback(CallbackRegistry<CallbackType>&);

        //- Construct as copy
        Callback(const Callback<CallbackType>&);


    // Destructor

        virtual ~Callback();


    // Member functions

        // Registration

            //- Register Callback with CallbackRegistry
            bool checkIn();

            //- Check-out Callback from CallbackRegistry
            bool checkOut();
};


// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

} // End namespace Foam

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#ifdef NoRepository
#   include <OpenFOAM/Callback.C>
#endif

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#endif

// ************************ vim: set sw=4 sts=4 et: ************************ //