MueLu_Ifpack2Smoother_decl.hpp

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

#ifndef MUELU_IFPACK2SMOOTHER_DECL_HPP
#define MUELU_IFPACK2SMOOTHER_DECL_HPP

#include <Teuchos_ParameterList.hpp>

#include <Xpetra_BlockedCrsMatrix_fwd.hpp>
#include <Xpetra_CrsMatrixWrap_fwd.hpp>
#include <Xpetra_Matrix_fwd.hpp>
#include <Xpetra_MultiVectorFactory_fwd.hpp>
#ifdef HAVE_XPETRA_TPETRA  // needed for clone()
#include <Xpetra_TpetraCrsMatrix_fwd.hpp>
#endif

#include "MueLu_ConfigDefs.hpp"
#include "MueLu_Ifpack2Smoother_fwd.hpp"

#if defined(HAVE_MUELU_IFPACK2)

#include <Tpetra_CrsMatrix.hpp>

#include <Ifpack2_Factory_decl.hpp>
#include <Ifpack2_Factory_def.hpp>
#include <Ifpack2_Preconditioner.hpp>

#include "MueLu_Level_fwd.hpp"
#include "MueLu_SmootherPrototype.hpp"
#include "MueLu_Utilities_fwd.hpp"
#include "MueLu_Aggregates_fwd.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 Ifpack2Smoother : public SmootherPrototype<Scalar, LocalOrdinal, GlobalOrdinal, Node> {
#undef MUELU_IFPACK2SMOOTHER_SHORT
#include "MueLu_UseShortNames.hpp"

 public:

  // TODO: update doc for Ifpack2. Right now, it's a copy of the doc of IfpackSmoother
#ifndef _MSC_VER
  // Avoid error C3772: invalid friend template declaration
  template <class Scalar2, class LocalOrdinal2, class GlobalOrdinal2, class Node2>
  friend class Ifpack2Smoother;
#endif

  Ifpack2Smoother(const std::string& type, const Teuchos::ParameterList& paramList = Teuchos::ParameterList(), const LO& overlap = 0);  // TODO: empty paramList valid for Ifpack??

  virtual ~Ifpack2Smoother() {}


  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 SetPrecParameters(const Teuchos::ParameterList& list = Teuchos::ParameterList()) const;

  void SetupSchwarz(Level& currentLevel);
  void SetupChebyshev(Level& currentLevel);
  void SetupLineSmoothing(Level& currentLevel);
  void SetupBlockRelaxation(Level& currentLevel);
  void SetupTopological(Level& currentLevel);
  void SetupAggregate(Level& currentLevel);
  void SetupHiptmair(Level& currentLevel);
  void SetupGeneric(Level& currentLevel);
  Scalar SetupChebyshevEigenvalues(Level& currentLevel, const std::string& matrixName, const std::string& label, Teuchos::ParameterList& paramList) const;

 private:
  bool constructionSuccessful_;

  std::string type_;

  LO overlap_;

  RCP<Ifpack2::Preconditioner<Scalar, LocalOrdinal, GlobalOrdinal, Node> > prec_;

  RCP<Operator> A_;

};  // class Ifpack2Smoother

#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 Ifpack2Smoother<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:
#ifndef _MSC_VER
  // Avoid error C3772: invalid friend template declaration
  template <class Scalar2, class LocalOrdinal2, class GlobalOrdinal2, class Node2>
  friend class Ifpack2Smoother;
#endif

  Ifpack2Smoother(const std::string& type, const Teuchos::ParameterList& paramList = Teuchos::ParameterList(), const LocalOrdinal& overlap = 0) {
    MUELU_TPETRA_ETI_EXCEPTION("Ifpack2Smoother<double,int,int,EpetraNode>", "Ifpack2Smoother<double,int,int,EpetraNode>", "int");
  };

  virtual ~Ifpack2Smoother() {}

  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;
  };

 private:
  void SetPrecParameters(const Teuchos::ParameterList& list = Teuchos::ParameterList()) const {}
};
#endif

#endif  // HAVE_MUELU_EPETRA

}  // namespace MueLu

#define MUELU_IFPACK2SMOOTHER_SHORT
#endif  // HAVE_MUELU_IFPACK2
#endif  // MUELU_IFPACK2SMOOTHER_DECL_HPP