Ifpack2Preconditioner.h

// Copyright (C) 2014 Chris Richardson
//
// This file is part of DOLFIN.
//
// DOLFIN is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// DOLFIN 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with DOLFIN. If not, see <http://www.gnu.org/licenses/>.
//

#ifndef __DOLFIN_IFPACK2_PRECONDITIONER_H
#define __DOLFIN_IFPACK2_PRECONDITIONER_H

#ifdef HAS_TRILINOS

#include <map>
#include <memory>
#include <Ifpack2_Factory.hpp>
#include <dolfin/common/types.h>
#include "TpetraMatrix.h"
#include "TpetraVector.h"
#include "TrilinosPreconditioner.h"

namespace dolfin
{

  class BelosKrylovSolver;


  class Ifpack2Preconditioner : public TrilinosPreconditioner, public Variable
  {

  public:

    explicit Ifpack2Preconditioner(std::string type = "default");

    virtual ~Ifpack2Preconditioner();

    virtual void set(BelosKrylovSolver& solver);

    std::string str(bool verbose) const;

    virtual void init(std::shared_ptr<const TpetraMatrix> P);

    static std::map<std::string, std::string> preconditioners();

    static Parameters default_parameters();

  private:

    // name of preconditioner
    std::string _name;

    typedef Ifpack2::Preconditioner<double, int, dolfin::la_index,
                                    TpetraVector::node_type> prec_type;

    // Ifpack2 preconditioner, to be constructed from a
    // Tpetra Operator or Matrix
    Teuchos::RCP<prec_type> _prec;

  };

}

#endif

#endif