MueLu_BelosSmoother_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_BELOSSMOOTHER_DECL_HPP
#define MUELU_BELOSSMOOTHER_DECL_HPP

#include <Teuchos_ParameterList.hpp>

#include <Xpetra_Matrix_fwd.hpp>
#include <Xpetra_MultiVectorFactory_fwd.hpp>

#include "MueLu_ConfigDefs.hpp"

#if defined(HAVE_MUELU_BELOS)

#include "MueLu_BelosSmoother_fwd.hpp"

#ifdef HAVE_XPETRA_TPETRA
#include "BelosTpetraAdapter.hpp"
#include <Tpetra_Operator.hpp>
#include <Tpetra_MultiVector.hpp>
#endif

#include "MueLu_Level_fwd.hpp"
#include "MueLu_SmootherPrototype.hpp"
#include "MueLu_Utilities_fwd.hpp"

#include <BelosSolverManager.hpp>

namespace MueLu {

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 BelosSmoother : public SmootherPrototype<Scalar, LocalOrdinal, GlobalOrdinal, Node> {
#undef MUELU_BELOSSMOOTHER_SHORT
#include "MueLu_UseShortNames.hpp"

 public:

  // TODO: update doc for Belos.
#ifndef _MSC_VER
  // Avoid error C3772: invalid friend template declaration
  template <class Scalar2, class LocalOrdinal2, class GlobalOrdinal2, class Node2>
  friend class BelosSmoother;
#endif

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

  virtual ~BelosSmoother() = default;


  void SetParameterList(const Teuchos::ParameterList& paramList);



  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 describe(Teuchos::FancyOStream &out, const VerbLevel verbLevel = Default) const
  void print(Teuchos::FancyOStream& out, const VerbLevel verbLevel = Default) const;


  // RCP<Ifpack2::Preconditioner<Scalar,LocalOrdinal,GlobalOrdinal,Node> > getPreconditioner(){return prec_;}

  size_t getNodeSmootherComplexity() const;

 private:
  void SetupBelos(Level& currentLevel);

 private:
  std::string type_;

  typedef Tpetra::MultiVector<SC, LO, GO, NO> tMV;
  typedef Tpetra::Operator<SC, LO, GO, NO> tOP;
  RCP<Belos::LinearProblem<Scalar, tMV, tOP> > tBelosProblem_;
  RCP<Belos::SolverManager<Scalar, tMV, tOP> > tSolver_;

  RCP<Matrix> A_;

};  // class BelosSmoother

#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 BelosSmoother<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_BELOSSMOOTHER_SHORT
#include "MueLu_UseShortNames.hpp"

 public:
#ifndef _MSC_VER
  // Avoid error C3772: invalid friend template declaration
  template <class Scalar2, class LocalOrdinal2, class GlobalOrdinal2, class Node2>
  friend class BelosSmoother;
#endif

  BelosSmoother(const std::string& type, const Teuchos::ParameterList& paramList = Teuchos::ParameterList(), const LocalOrdinal& overlap = 0) {
    MUELU_TPETRA_ETI_EXCEPTION("BelosSmoother<double,int,int,EpetraNode>", "BelosSmoother<double,int,int,EpetraNode>", "int");
  };

  virtual ~BelosSmoother() {}

  void SetParameterList(const Teuchos::ParameterList& paramList) {}
  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_BELOSSMOOTHER_SHORT
#endif  // HAVE_MUELU_BELOS
#endif  // MUELU_BELOSSMOOTHER_DECL_HPP