/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | www.openfoam.com
     \\/     M anipulation  |
-------------------------------------------------------------------------------
    Copyright (C) 2011-2016 OpenFOAM Foundation
    Copyright (C) 2019 OpenCFD Ltd.
-------------------------------------------------------------------------------
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::PCICG

Description
    Preconditioned conjugate gradient solver for symmetric lduMatrices
    using a run-time selectable preconditioner.

SourceFiles
    PCICG.C

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

#ifndef PCICG_H
#define PCICG_H

#include "LduMatrix.H"

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

namespace Foam
{

/*---------------------------------------------------------------------------*\
                           Class PCICG Declaration
\*---------------------------------------------------------------------------*/

template<class Type, class DType, class LUType>
class PCICG
:
    public LduMatrix<Type, DType, LUType>::solver
{
    // Private Member Functions

        //- No copy construct
        PCICG(const PCICG&) = delete;

        //- No copy assignment
        void operator=(const PCICG&) = delete;


public:

    //- Runtime type information
    TypeName("PCICG");


    // Constructors

        //- Construct from matrix components and solver data dictionary
        PCICG
        (
            const word& fieldName,
            const LduMatrix<Type, DType, LUType>& matrix,
            const dictionary& solverDict
        );


    // Destructor

        virtual ~PCICG() = default;


    // Member Functions

        //- Solve the matrix with this solver
        virtual SolverPerformance<Type> solve(Field<Type>& psi) const;
};


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

} // End namespace Foam

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

#ifdef NoRepository
    #include "PCICG.C"
#endif

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

#endif

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