MueLu_AmesosSmoother.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_AMESOSSMOOTHER_HPP
#define MUELU_AMESOSSMOOTHER_HPP

#include "MueLu_ConfigDefs.hpp"
#if defined(HAVE_MUELU_EPETRA) && defined(HAVE_MUELU_AMESOS)

#include <Teuchos_ParameterList.hpp>
#include <Xpetra_Matrix_fwd.hpp>

class Epetra_LinearProblem;
class Amesos_BaseSolver;

#include "MueLu_SmootherPrototype.hpp"
#include "MueLu_Exceptions.hpp"

#include "MueLu_Level_fwd.hpp"
#include "MueLu_FactoryBase_fwd.hpp"
#include "MueLu_Utilities_fwd.hpp"

namespace MueLu {

template <class Node = typename SmootherPrototype<double, int, int>::node_type>
class AmesosSmoother : public SmootherPrototype<double, int, int, Node> {
  typedef double Scalar;
  typedef int LocalOrdinal;
  typedef int GlobalOrdinal;

#undef MUELU_AMESOSSMOOTHER_SHORT
#include "MueLu_UseShortNames.hpp"

 public:


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

  virtual ~AmesosSmoother(){};




  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:
  // Important note:
  // linearProblem_ must be destroyed before A_, because destructor of linearProblem_ is using A_.
  // In C++, destructor of member objects are called in the reverse order they appear within the declaration for the class.
  // ==18029== Invalid read of size 8
  // ==18029==    at 0xC0780A: Epetra_LinearProblem::GetMatrix() const (Epetra_LinearProblem.h:173)
  // ==18029==    by 0xC5EC27: Amesos_Superlu::PrintTiming() const (Amesos_Superlu.cpp:664)
  // ==18029==    by 0xC628C6: Amesos_Superlu::~Amesos_Superlu() (Amesos_Superlu.cpp:108)

  std::string type_;

  RCP<Matrix> A_;

  RCP<Epetra_LinearProblem> linearProblem_;

  RCP<Amesos_BaseSolver> prec_;

};  // class AmesosSmoother

// when <Scalar, LocalOrdinal, GlobalOrdinal> == <double, int, int>. Otherwise, an exception is thrown.
template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
RCP<MueLu::SmootherPrototype<Scalar, LocalOrdinal, GlobalOrdinal, Node> >
GetAmesosSmoother(const std::string& /* type */ = "", const Teuchos::ParameterList& /* paramList */ = Teuchos::ParameterList()) {
  TEUCHOS_TEST_FOR_EXCEPTION(true, Exceptions::RuntimeError,
                             "AmesosSmoother cannot be used with Scalar != double, LocalOrdinal != int, GlobalOrdinal != int");
  TEUCHOS_UNREACHABLE_RETURN(Teuchos::null);
}

// specialization for Epetra
#if defined(HAVE_MUELU_SERIAL)
template <>
inline RCP<MueLu::SmootherPrototype<double, int, int, Xpetra::EpetraNode> >
GetAmesosSmoother<double, int, int, Xpetra::EpetraNode>(const std::string& type, const Teuchos::ParameterList& paramList) {
  return rcp(new MueLu::AmesosSmoother<Xpetra::EpetraNode>(type, paramList));
}
#endif  // HAVE_MUELU_SERIAL

}  // namespace MueLu

#define MUELU_AMESOSSMOOTHER_SHORT

#endif  // HAVE_MUELU_AMESOS
#endif  // MUELU_AMESOSSMOOTHER_HPP