MueLu_Amesos2Smoother_decl.hpp

Go to the documentation of this file.

// @HEADER
// *****************************************************************************
//        MueLu: A package for multigrid based preconditioning
//
// Copyright 2012 NTESS and the MueLu contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#ifndef MUELU_AMESOS2SMOOTHER_DECL_HPP
#define MUELU_AMESOS2SMOOTHER_DECL_HPP

#include "MueLu_ConfigDefs.hpp"
#if defined(HAVE_MUELU_AMESOS2)

#include <Teuchos_ParameterList.hpp>
#include <Teuchos_SerialDenseMatrix.hpp>
#include <Teuchos_LAPACK.hpp>

#include "MueLu_Amesos2Smoother_fwd.hpp"

#include "MueLu_SmootherPrototype.hpp"
#include "MueLu_FactoryBase_fwd.hpp"
#include "MueLu_Utilities_fwd.hpp"

namespace Amesos2 {
template <class OP, class MV>
class Solver;
}

namespace MueLu {

template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
class Projection {
 public:
  Projection(RCP<Xpetra::MultiVector<Scalar, LocalOrdinal, GlobalOrdinal, Node>>& Nullspace);

  void projectOut(Xpetra::MultiVector<Scalar, LocalOrdinal, GlobalOrdinal, Node>& X);

  Teuchos::RCP<Xpetra::MultiVector<Scalar, LocalOrdinal, GlobalOrdinal, Node>> Nullspace_;

 private:
  Teuchos::RCP<const Xpetra::Map<LocalOrdinal, GlobalOrdinal, Node>> localMap_;
};

template <class Scalar        = SmootherPrototype<>::scalar_type,
          class LocalOrdinal  = typename SmootherPrototype<Scalar>::local_ordinal_type,
          class GlobalOrdinal = typename SmootherPrototype<Scalar, LocalOrdinal>::global_ordinal_type,
          class Node          = typename SmootherPrototype<Scalar, LocalOrdinal, GlobalOrdinal>::node_type>
class Amesos2Smoother : public SmootherPrototype<Scalar, LocalOrdinal, GlobalOrdinal, Node> {
#undef MUELU_AMESOS2SMOOTHER_SHORT
#include "MueLu_UseShortNames.hpp"

 public:


  Amesos2Smoother(const std::string& type = "", const Teuchos::ParameterList& paramList = Teuchos::ParameterList());

  virtual ~Amesos2Smoother();

  RCP<const ParameterList> GetValidParameterList() const;




  void DeclareInput(Level& currentLevel) const;




  void Setup(Level& currentLevel);

  void Apply(MultiVector& X, const MultiVector& B, bool InitialGuessIsZero = false) const;

  RCP<SmootherPrototype> Copy() const;



  std::string description() const;

  // using MueLu::Describable::describe; // overloading, not hiding
  void print(Teuchos::FancyOStream& out, const VerbLevel verbLevel = Default) const;

  size_t getNodeSmootherComplexity() const;


 private:
  typedef Tpetra::CrsMatrix<Scalar, LocalOrdinal, GlobalOrdinal, Node> Tpetra_CrsMatrix;
  typedef Tpetra::MultiVector<Scalar, LocalOrdinal, GlobalOrdinal, Node> Tpetra_MultiVector;

  std::string type_;

  RCP<Amesos2::Solver<Tpetra_CrsMatrix, Tpetra_MultiVector>> prec_;

  bool useTransformation_;
  RCP<MultiVector> X_, B_;

  RCP<Projection<Scalar, LocalOrdinal, GlobalOrdinal, Node>> projection_;

};  // class Amesos2Smoother

#ifdef HAVE_MUELU_EPETRA

#if ((defined(EPETRA_HAVE_OMP) && (!defined(HAVE_TPETRA_INST_OPENMP) || !defined(HAVE_TPETRA_INST_INT_INT))) || \
     (!defined(EPETRA_HAVE_OMP) && (!defined(HAVE_TPETRA_INST_SERIAL) || !defined(HAVE_TPETRA_INST_INT_INT))))
// Stub specialization for missing Epetra template args
template <>
class Amesos2Smoother<double, int, int, Xpetra::EpetraNode> : public SmootherPrototype<double, int, int, Xpetra::EpetraNode> {
  typedef double Scalar;
  typedef int LocalOrdinal;
  typedef int GlobalOrdinal;
  typedef Xpetra::EpetraNode Node;
#undef MUELU_AMESOS2SMOOTHER_SHORT
#include "MueLu_UseShortNames.hpp"

 public:
  Amesos2Smoother(const std::string& type = "", const Teuchos::ParameterList& paramList = Teuchos::ParameterList()) {
    MUELU_TPETRA_ETI_EXCEPTION("Amesos2Smoother<double,int,int,EpetraNode>", "Amesos2Smoother<double,int,int,EpetraNode>", "int");
  }
  virtual ~Amesos2Smoother(){};
  void DeclareInput(Level& currentLevel) const {};
  void Setup(Level& currentLevel){};
  void Apply(MultiVector& X, const MultiVector& B, bool InitialGuessIsZero = false) const {};

  RCP<SmootherPrototype> Copy() const { return Teuchos::null; };

  std::string description() const { return std::string(""); };
  void print(Teuchos::FancyOStream& out, const VerbLevel verbLevel = Default) const {};

  size_t getNodeSmootherComplexity() const {
    size_t cplx = 0;
    return cplx;
  };
};
#endif
#endif  // HAVE_MUELU_EPETRA

}  // namespace MueLu

#define MUELU_AMESOS2SMOOTHER_SHORT
#endif  // HAVE_MUELU_AMESOS2
#endif  // MUELU_AMESOS2SMOOTHER_DECL_HPP