Tpetra_LocalCrsMatrixOperator_decl.hpp

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#ifndef TPETRA_LOCALCRSMATRIXOPERATOR_DECL_HPP
#define TPETRA_LOCALCRSMATRIXOPERATOR_DECL_HPP

#include "Tpetra_LocalCrsMatrixOperator_fwd.hpp"
#include "Tpetra_LocalOperator.hpp"
#include "KokkosSparse_CrsMatrix.hpp"
#include <memory> // std::shared_ptr

namespace Tpetra {

  template<class MultiVectorScalar, class MatrixScalar, class Device>
  class LocalCrsMatrixOperator :
    public LocalOperator<MultiVectorScalar, Device> {
  private:
    using mv_scalar_type =
      typename LocalOperator<MultiVectorScalar, Device>::scalar_type;
    using matrix_scalar_type =
      typename LocalOperator<MatrixScalar, Device>::scalar_type;

  private:
    using array_layout =
      typename LocalOperator<MultiVectorScalar, Device>::array_layout;
    using device_type =
      typename LocalOperator<MultiVectorScalar, Device>::device_type;
    using local_ordinal_type =
      ::Tpetra::Details::DefaultTypes::local_ordinal_type;
    using execution_space = typename Device::execution_space;
    using local_graph_type =
      Kokkos::StaticCrsGraph<local_ordinal_type,
                             array_layout,
                             execution_space>;
  public:
    using local_matrix_type =
      KokkosSparse::CrsMatrix<matrix_scalar_type,
                              local_ordinal_type,
                              execution_space,
                              void,
                              typename local_graph_type::size_type>;

    LocalCrsMatrixOperator (const std::shared_ptr<local_matrix_type>& A);
    ~LocalCrsMatrixOperator () override = default;

    void
    apply (Kokkos::View<const mv_scalar_type**, array_layout,
             device_type, Kokkos::MemoryTraits<Kokkos::Unmanaged> > X,
           Kokkos::View<mv_scalar_type**, array_layout,
             device_type, Kokkos::MemoryTraits<Kokkos::Unmanaged> > Y,
           const Teuchos::ETransp mode,
           const mv_scalar_type alpha,
           const mv_scalar_type beta) const override;

    bool hasTransposeApply () const override;

    const local_matrix_type& getLocalMatrix () const;

  private:
    std::shared_ptr<local_matrix_type> A_;
  };

} // namespace Tpetra

#endif // TPETRA_LOCALCRSMATRIXOPERATOR_DECL_HPP