Tpetra_RowMatrix_decl.hpp

// @HEADER
// *****************************************************************************
//          Tpetra: Templated Linear Algebra Services Package
//
// Copyright 2008 NTESS and the Tpetra contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#ifndef TPETRA_ROWMATRIX_DECL_HPP
#define TPETRA_ROWMATRIX_DECL_HPP

#include "Tpetra_ConfigDefs.hpp"
#include "Tpetra_RowMatrix_fwd.hpp"
#include "Tpetra_Vector_fwd.hpp"
#include "Tpetra_Operator.hpp"
#include "Tpetra_RowGraph_fwd.hpp"
#include "Tpetra_Packable.hpp"
#include "Tpetra_SrcDistObject.hpp"
#include "Teuchos_Describable.hpp"
#include "Kokkos_ArithTraits.hpp"

namespace Tpetra {
  template <class Scalar,
            class LocalOrdinal,
            class GlobalOrdinal,
            class Node>
  class RowMatrix :
    virtual public Operator<Scalar, LocalOrdinal, GlobalOrdinal, Node>,
    virtual public SrcDistObject,
    public Packable<char, LocalOrdinal> {
  public:


    typedef Scalar        scalar_type;
    typedef LocalOrdinal  local_ordinal_type;
    typedef GlobalOrdinal global_ordinal_type;
    typedef Node          node_type;

    using impl_scalar_type = typename Kokkos::ArithTraits<Scalar>::val_type;
    using mag_type = typename Kokkos::ArithTraits<Scalar>::mag_type;

    typedef typename 
        Kokkos::View<impl_scalar_type*, typename Node::device_type>::const_type
        values_device_view_type;
    typedef typename values_device_view_type::HostMirror::const_type
        values_host_view_type;
    typedef typename values_device_view_type::HostMirror
        nonconst_values_host_view_type;

    typedef typename
        Kokkos::View<LocalOrdinal *, typename Node::device_type>::const_type
        local_inds_device_view_type;
    typedef typename local_inds_device_view_type::HostMirror::const_type
        local_inds_host_view_type;
    typedef typename local_inds_device_view_type::HostMirror
        nonconst_local_inds_host_view_type;

    typedef typename
        Kokkos::View<GlobalOrdinal *, typename Node::device_type>::const_type
        global_inds_device_view_type;
    typedef typename global_inds_device_view_type::HostMirror::const_type
        global_inds_host_view_type;
    typedef typename global_inds_device_view_type::HostMirror
        nonconst_global_inds_host_view_type;


    typedef typename
        Kokkos::View<const size_t*, typename Node::device_type>::const_type
        row_ptrs_device_view_type;
    typedef typename row_ptrs_device_view_type::HostMirror::const_type
        row_ptrs_host_view_type;





    virtual ~RowMatrix();



    virtual Teuchos::RCP<const Teuchos::Comm<int> > getComm() const = 0;


    virtual Teuchos::RCP<const Map<LocalOrdinal,GlobalOrdinal,Node> > getRowMap() const = 0;

    virtual Teuchos::RCP<const Map<LocalOrdinal,GlobalOrdinal,Node> > getColMap() const = 0;

    virtual Teuchos::RCP<const RowGraph<LocalOrdinal,GlobalOrdinal,Node> > getGraph() const = 0;

    virtual global_size_t getGlobalNumRows() const = 0;

    virtual global_size_t getGlobalNumCols() const = 0;

    virtual size_t getLocalNumRows() const = 0;

    virtual size_t getLocalNumCols() const = 0;

    virtual GlobalOrdinal getIndexBase() const = 0;

    virtual global_size_t getGlobalNumEntries() const = 0;

    virtual size_t getLocalNumEntries() const = 0;

    virtual size_t getNumEntriesInGlobalRow (GlobalOrdinal globalRow) const = 0;

    virtual size_t getNumEntriesInLocalRow (LocalOrdinal localRow) const = 0;

    virtual size_t getGlobalMaxNumRowEntries () const = 0;

    virtual local_ordinal_type getBlockSize () const = 0;

    virtual size_t getLocalMaxNumRowEntries () const = 0;

    virtual bool hasColMap () const = 0;

    virtual bool isLocallyIndexed() const = 0;

    virtual bool isGloballyIndexed() const = 0;

    virtual bool isFillComplete() const = 0;

    virtual bool supportsRowViews() const = 0;




    virtual void
    getGlobalRowCopy (GlobalOrdinal GlobalRow,
                      nonconst_global_inds_host_view_type &Indices,
                      nonconst_values_host_view_type &Values,
                      size_t& NumEntries) const = 0;

    virtual void
    getLocalRowCopy (LocalOrdinal LocalRow,
                     nonconst_local_inds_host_view_type &Indices,
                     nonconst_values_host_view_type &Values,
                     size_t& NumEntries) const = 0;

    virtual void
    getGlobalRowView (GlobalOrdinal GlobalRow,
                      global_inds_host_view_type &indices,
                      values_host_view_type &values) const = 0;

    virtual void
    getLocalRowView (LocalOrdinal LocalRow,
                     local_inds_host_view_type & indices,
                     values_host_view_type & values) const = 0;

    virtual void getLocalDiagCopy (Vector<Scalar, LocalOrdinal, GlobalOrdinal, Node> &diag) const = 0;



    virtual void leftScale (const Vector<Scalar, LocalOrdinal, GlobalOrdinal, Node>& x) = 0;

    virtual void rightScale (const Vector<Scalar, LocalOrdinal, GlobalOrdinal, Node>& x) = 0;

    virtual mag_type getFrobeniusNorm() const = 0;

    virtual Teuchos::RCP<RowMatrix<Scalar, LocalOrdinal, GlobalOrdinal, Node> >
    add (const Scalar& alpha,
         const RowMatrix<Scalar, LocalOrdinal, GlobalOrdinal, Node>& A,
         const Scalar& beta,
         const Teuchos::RCP<const Map<LocalOrdinal, GlobalOrdinal, Node> >& domainMap = Teuchos::null,
         const Teuchos::RCP<const Map<LocalOrdinal, GlobalOrdinal, Node> >& rangeMap = Teuchos::null,
         const Teuchos::RCP<Teuchos::ParameterList>& params = Teuchos::null) const;

  private:
    bool
    packRow (char* const numEntOut,
             char* const valOut,
             char* const indOut,
             const size_t numEnt,
             const LocalOrdinal lclRow) const;

    // TODO (mfh 25 Jan 2015) Could just make this "protected" and let
    // CrsMatrix use it, since it's exactly the same there.
    void
    allocatePackSpace (Teuchos::Array<char>& exports,
                       size_t& totalNumEntries,
                       const Teuchos::ArrayView<const LocalOrdinal>& exportLIDs) const;

    void
    packImpl (const Teuchos::ArrayView<const LocalOrdinal>& exportLIDs,
              Teuchos::Array<char>& exports,
              const Teuchos::ArrayView<size_t>& numPacketsPerLID,
              size_t& constantNumPackets) const;


  public:
    virtual void
    pack (const Teuchos::ArrayView<const LocalOrdinal>& exportLIDs,
          Teuchos::Array<char>& exports,
          const Teuchos::ArrayView<size_t>& numPacketsPerLID,
          size_t& constantNumPackets) const;
  }; // class RowMatrix
} // namespace Tpetra

#endif // TPETRA_ROWMATRIX_DECL_HPP