MueLu_BelosSmoother_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_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"
 
#include "BelosTpetraAdapter.hpp"
#include <Tpetra_Operator.hpp>
#include <Tpetra_MultiVector.hpp>
 
#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
 
}  // namespace MueLu
 
#define MUELU_BELOSSMOOTHER_SHORT
#endif  // HAVE_MUELU_BELOS
#endif  // MUELU_BELOSSMOOTHER_DECL_HPP