Amesos2_MultiVecAdapter_decl.hpp

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#ifndef AMESOS2_MULTIVEC_ADAPTER_DECL_HPP
#define AMESOS2_MULTIVEC_ADAPTER_DECL_HPP

#include <Teuchos_RCP.hpp>
#include <Teuchos_Ptr.hpp>
#include <Teuchos_ArrayView.hpp>
#include <Tpetra_Map.hpp>

#include "Amesos2_TypeDecl.hpp"
#include "Amesos2_VectorTraits.hpp"

namespace Amesos2 {


  template <class MV>
  struct MultiVecAdapter {};

  template <class MV>
  Teuchos::RCP<MultiVecAdapter<MV> >
  createMultiVecAdapter(Teuchos::RCP<MV> mv){
    using Teuchos::rcp;

    if(mv.is_null()) return Teuchos::null;
    return( rcp(new MultiVecAdapter<MV>(mv)) );
  }

  template <class MV>
  Teuchos::RCP<const MultiVecAdapter<MV> >
  createConstMultiVecAdapter(Teuchos::RCP<const MV> mv){
    using Teuchos::rcp;
    using Teuchos::rcp_const_cast;

    if(mv.is_null()) return Teuchos::null;
    return( rcp(new MultiVecAdapter<MV>(Teuchos::rcp_const_cast<MV,const MV>(mv))).getConst() );
  }


  // Utilities for getting and putting data from MultiVecs //

  namespace Util {

    template <typename MV, typename V>
    struct vector_pointer_helper {

      typedef typename VectorTraits<V>::ptr_scalar_type ptr_return_type ;

      static ptr_return_type * get_pointer_to_vector ( const Teuchos::Ptr< MV> &mv ) ;

      static ptr_return_type * get_pointer_to_vector ( Teuchos::Ptr< MV> &mv ) ;

      static ptr_return_type * get_pointer_to_vector ( const Teuchos::Ptr< const MV > &mv ) ;

      static ptr_return_type * get_pointer_to_vector ( Teuchos::Ptr< const MV > &mv ) ;
    };

    /*
     * If the multivector scalar type and the desired scalar tpye are
     * the same, then we can do a simple straight copy.
     */
    template <typename MV>
    struct same_type_get_copy {
      static void apply(const Teuchos::Ptr<const MV> mv,
                        const Teuchos::ArrayView<typename MV::scalar_t>& v,
                        const size_t ldx,
                        Teuchos::Ptr<const Tpetra::Map<typename MV::local_ordinal_t, typename MV::global_ordinal_t, typename MV::node_t> > distribution_map,
                        EDistribution distribution );
    };

    /*
     * In the case where the scalar type of the multi-vector and the
     * corresponding S type are different, then we need to first get a
     * copy of the scalar values, then convert each one into the S
     * type before inserting into the vals array.
     */
    template <typename MV, typename S>
    struct diff_type_get_copy {
      static void apply(const Teuchos::Ptr<const MV> mv,
                        const Teuchos::ArrayView<S>& v,
                        const size_t ldx,
                        Teuchos::Ptr<const Tpetra::Map<typename MV::local_ordinal_t, typename MV::global_ordinal_t, typename MV::node_t> > distribution_map,
                        EDistribution distribution );
    };

    template <class MV, typename S>
    struct get_1d_copy_helper {
      static void
      do_get (const Teuchos::Ptr<const MV>& mv,
              const Teuchos::ArrayView<S>& vals,
              const size_t ldx,
              Teuchos::Ptr<const Tpetra::Map<typename MV::local_ordinal_t, typename MV::global_ordinal_t, typename MV::node_t> > distribution_map,
              EDistribution distribution = ROOTED);

      static void
      do_get (const Teuchos::Ptr<const MV>& mv,
              const Teuchos::ArrayView<S>& vals,
              const size_t ldx,
              EDistribution distribution,
              typename MV::global_ordinal_t indexBase = 0);

      static void
      do_get (const Teuchos::Ptr<const MV>& mv,
              const Teuchos::ArrayView<S>& vals,
              const size_t ldx);
    };

    template <class MV, typename KV>
    struct get_1d_copy_helper_kokkos_view {
      static void
      do_get (const Teuchos::Ptr<const MV>& mv,
              KV& kokkos_vals,
              const size_t ldx,
              Teuchos::Ptr<const Tpetra::Map<typename MV::local_ordinal_t, typename MV::global_ordinal_t, typename MV::node_t> > distribution_map,
              EDistribution distribution = ROOTED);

      static void
      do_get (const Teuchos::Ptr<const MV>& mv,
              KV& kokkos_vals,
              const size_t ldx,
              EDistribution distribution,
              typename MV::global_ordinal_t indexBase = 0);

      static void
      do_get (const Teuchos::Ptr<const MV>& mv,
              KV& kokkos_vals,
              const size_t ldx);
    };

    /*
     * If the multivector scalar type and the desired scalar tpye are
     * the same, then we can do a simple straight copy.
     */
    template <typename MV>
    struct same_type_data_put {
      static void apply(const Teuchos::Ptr<MV>& mv,
                        const Teuchos::ArrayView<typename MV::scalar_t>& data,
                        const size_t ldx,
                        Teuchos::Ptr<const Tpetra::Map<typename MV::local_ordinal_t, typename MV::global_ordinal_t, typename MV::node_t> > distribution_map,
                        EDistribution distribution );
    };

    /*
     * In the case where the scalar type of the multi-vector and the
     * corresponding S type are different, then we need to first get a
     * copy of the scalar values, then convert each one into the S
     * type before inserting into the vals array.
     */
    template <typename MV, typename S>
    struct diff_type_data_put {
      static void apply(const Teuchos::Ptr<MV>& mv,
                        const Teuchos::ArrayView<S>& data,
                        const size_t ldx,
                        Teuchos::Ptr<const Tpetra::Map<typename MV::local_ordinal_t, typename MV::global_ordinal_t, typename MV::node_t> > distribution_map,
                        EDistribution distribution );
    };

    template <class MV, typename S>
    struct put_1d_data_helper {
      static void do_put(const Teuchos::Ptr<MV>& mv,
                         const Teuchos::ArrayView<S>& data,
                         const size_t ldx,
                         Teuchos::Ptr<const Tpetra::Map<typename MV::local_ordinal_t, typename MV::global_ordinal_t, typename MV::node_t> > distribution_map,
                         EDistribution distribution = ROOTED);

      static void do_put(const Teuchos::Ptr<MV>& mv,
                         const Teuchos::ArrayView<S>& data,
                         const size_t ldx,
                         EDistribution distribution, typename MV::global_ordinal_t indexBase = 0);

      static void do_put(const Teuchos::Ptr<MV>& mv,
                         const Teuchos::ArrayView<S>& data,
                         const size_t ldx);
    };

    template <class MV, typename KV>
    struct put_1d_data_helper_kokkos_view {
      static void do_put(const Teuchos::Ptr<MV>& mv,
                         KV& kokkos_data,
                         const size_t ldx,
                         Teuchos::Ptr<const Tpetra::Map<typename MV::local_ordinal_t, typename MV::global_ordinal_t, typename MV::node_t> > distribution_map,
                         EDistribution distribution = ROOTED);

      static void do_put(const Teuchos::Ptr<MV>& mv,
                         KV& kokkos_data,
                         const size_t ldx,
                         EDistribution distribution, typename MV::global_ordinal_t indexBase = 0);

      static void do_put(const Teuchos::Ptr<MV>& mv,
                         KV& kokkos_data,
                         const size_t ldx);
    };
  }
} // end namespace Amesos2

#include "Amesos2_TpetraMultiVecAdapter_decl.hpp"
#include "Amesos2_KokkosMultiVecAdapter_decl.hpp"
#ifdef HAVE_AMESOS2_EPETRA
#  include "Amesos2_EpetraMultiVecAdapter_decl.hpp"
#endif

#endif  // AMESOS2_MULTIVEC_ADAPTER_DECL_HPP