MueLu_MatrixFreeTentativeP_kokkos_decl.hpp

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#ifndef MUELU_MATRIXFREETENTATIVEP_KOKKOS_DECL_HPP
#define MUELU_MATRIXFREETENTATIVEP_KOKKOS_DECL_HPP

#include "MueLu_ConfigDefs.hpp"

#include "MueLu_MatrixFreeTentativeP_kokkos_fwd.hpp"

#include <KokkosCompat_ClassicNodeAPI_Wrapper.hpp>

#include "Teuchos_ScalarTraits.hpp"

#include "MueLu_Aggregates_kokkos_fwd.hpp"
#include "MueLu_PerfUtils_fwd.hpp"
#include "Xpetra_Operator.hpp"
#include "MueLu_Utilities_kokkos_fwd.hpp"

namespace MueLu {

  // template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
  // class MatrixFreeTentativeP_kokkos;

  template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class DeviceType>
  class MatrixFreeTentativeP_kokkos<Scalar, LocalOrdinal, GlobalOrdinal, Kokkos::Compat::KokkosDeviceWrapperNode<DeviceType>> : public Xpetra::Operator<Scalar,LocalOrdinal,GlobalOrdinal,Kokkos::Compat::KokkosDeviceWrapperNode<DeviceType>> {
  public:
    typedef LocalOrdinal                                             local_ordinal_type;
    typedef GlobalOrdinal                                            global_ordinal_type;
    typedef typename DeviceType::execution_space                     execution_space;
    typedef Kokkos::RangePolicy<local_ordinal_type, execution_space> range_type;
    typedef Kokkos::MDRangePolicy<local_ordinal_type, execution_space, Kokkos::Rank<2>> md_range_type;
    typedef Kokkos::Compat::KokkosDeviceWrapperNode<DeviceType>      node_type;
    typedef typename Teuchos::ScalarTraits<Scalar>::coordinateType   real_type;

  private:
    // For compatibility
    typedef node_type                                           Node;
#undef MUELU_MATRIXFREETENTATIVEP_KOKKOS_SHORT
#include "MueLu_UseShortNames.hpp"

  public:


    MatrixFreeTentativeP_kokkos(Teuchos::RCP<const Map> coarse_map, Teuchos::RCP<const Map> fine_map, Teuchos::RCP<const Aggregates_kokkos> aggregates)
    : fine_map_(fine_map),
      coarse_map_(coarse_map),
      aggregates_(aggregates)
    { }

    ~MatrixFreeTentativeP_kokkos() = default;

    // compute the apply operator, Y = alpha*R*X + beta*Y
    void apply(const MultiVector &X, MultiVector &Y, Teuchos::ETransp mode=Teuchos::NO_TRANS, Scalar alpha=Teuchos::ScalarTraits<Scalar>::one(), Scalar beta=Teuchos::ScalarTraits<Scalar>::zero()) const override;

    // compute the residual
    void residual (const MultiVector &X, const MultiVector &B, MultiVector &R) const override;

    // get the range map
    Teuchos::RCP<const Map> getRangeMap() const override {
      return fine_map_;
    }

    // get the domain map
    Teuchos::RCP<const Map> getDomainMap() const override {
      return coarse_map_;
    }

    // get the aggregates
    Teuchos::RCP<const Aggregates_kokkos> getAggregates() const {
      return aggregates_;
    }

  private:

    // the fine map
    const Teuchos::RCP<const Map> fine_map_;

    // the coarse map
    const Teuchos::RCP<const Map> coarse_map_;

    // the aggregates required for the grid transfer
    const Teuchos::RCP<const Aggregates_kokkos> aggregates_;
  };

} //namespace MueLu

#define MUELU_MATRIXFREETENTATIVEP_KOKKOS_SHORT
#endif // MUELU_MATRIXFREETENTATIVEP_KOKKOS_DECL_HPP