MueLu_Aggregates_kokkos_decl.hpp

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#ifndef MUELU_AGGREGATES_KOKKOS_DECL_HPP
#define MUELU_AGGREGATES_KOKKOS_DECL_HPP

#include "MueLu_ConfigDefs.hpp"
#ifdef HAVE_MUELU_KOKKOS_REFACTOR

#include <Kokkos_StaticCrsGraph.hpp>
#include <KokkosCompat_ClassicNodeAPI_Wrapper.hpp>

#include "MueLu_Aggregates_kokkos_fwd.hpp"

#include <Xpetra_Map_fwd.hpp>
#include <Xpetra_Vector_fwd.hpp>
#include <Xpetra_VectorFactory_fwd.hpp>

#include "MueLu_BaseClass.hpp"

#include "MueLu_LWGraph_kokkos_fwd.hpp"
#include "MueLu_IndexManager_kokkos.hpp"

#define MUELU_UNAGGREGATED  -1   /* indicates that a node is unassigned to  */
                                 /* any aggregate.                          */

#define MUELU_UNASSIGNED    -1   /* indicates a vertex is not yet claimed   */
                                 /* by a processor during aggregation.      */
                                 /* Note, it is possible at                 */
                                 /* this stage that some processors may have*/
                                 /* claimed their copy of a vertex for one  */
                                 /* of their aggregates.  However, some     */
                                 /* arbitration still needs to occur.       */
                                 /* The corresponding procWinner[]'s remain */
                                 /* as MUELU_UNASSIGNED until               */
                                 /* ArbitrateAndCommunicate() is            */
                                 /* invoked to arbitrate.                   */

/*****************************************************************************

****************************************************************************/

namespace MueLu {

  template <class LocalOrdinal, class GlobalOrdinal, class Node>
  class Aggregates_kokkos;

  template <class LocalOrdinal, class GlobalOrdinal, class DeviceType>
  class Aggregates_kokkos<LocalOrdinal, GlobalOrdinal, Kokkos::Compat::KokkosDeviceWrapperNode<DeviceType> > : public BaseClass {
  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::Compat::KokkosDeviceWrapperNode<DeviceType>      node_type;
    typedef DeviceType                                               device_type;

    typedef Kokkos::View<LocalOrdinal*, DeviceType>                  aggregates_sizes_type;
    typedef Kokkos::StaticCrsGraph<LocalOrdinal, Kokkos::LayoutLeft, execution_space> local_graph_type;

  private:
    // For compatibility
    typedef node_type                                           Node;
#undef MUELU_AGGREGATES_KOKKOS_SHORT
#include "MueLu_UseShortNamesOrdinal.hpp"

  public:

  public:

    Aggregates_kokkos(LWGraph_kokkos graph);

    Aggregates_kokkos(const RCP<const Map>& map);

    virtual ~Aggregates_kokkos() { }

    KOKKOS_INLINE_FUNCTION LO GetNumAggregates() const {
      return numAggregates_;
    }

    void SetNumAggregates(LO nAggregates) { numAggregates_ = nAggregates; }

    RCP<IndexManager_kokkos>& GetIndexManager() { return geoData_; }

    void SetIndexManager(RCP<IndexManager_kokkos> & geoData) { geoData_ = geoData; }

    KOKKOS_INLINE_FUNCTION void AggregatesCrossProcessors(const bool& flag) {
      aggregatesIncludeGhosts_ = flag;
    }

    KOKKOS_INLINE_FUNCTION bool AggregatesCrossProcessors() const {
      return aggregatesIncludeGhosts_;
    }

    RCP<LOVector>& GetVertex2AggIdNonConst()     { return vertex2AggId_;       }

    RCP<LOVector>& GetProcWinnerNonConst()       { return procWinner_;         }
    const RCP<LOVector>& GetVertex2AggId() const { return vertex2AggId_;       }

    const RCP<LOVector>& GetProcWinner() const   { return procWinner_;         }

    KOKKOS_INLINE_FUNCTION
    bool IsRoot(LO i) const                      { return isRoot_(i);          }

    KOKKOS_INLINE_FUNCTION
    void SetIsRoot(LO i, bool value = true)      { isRoot_(i) = value;         }

    const RCP<const Map> GetMap() const; 

    typename aggregates_sizes_type::const_type ComputeAggregateSizes(bool forceRecompute = false) const;

    local_graph_type GetGraph() const;



    std::string description() const;

    //using MueLu::Describable::describe; // overloading, not hiding
    void print(Teuchos::FancyOStream &out, const Teuchos::EVerbosityLevel verbLevel = verbLevel_default) const;

  private:
    LO   numAggregates_;              

    RCP<LOVector> vertex2AggId_;

    RCP<LOVector> procWinner_;

    RCP<IndexManager_kokkos> geoData_;

    Kokkos::View<bool*, DeviceType> isRoot_;

    bool aggregatesIncludeGhosts_;

    mutable
    aggregates_sizes_type aggregateSizes_;

    mutable
    local_graph_type graph_;

    // This method is private because it is used only for printing and because with the current implementation, communication occurs each time this method is called.
    GO GetNumGlobalAggregates() const;
  };

} //namespace MueLu

#endif // HAVE_MUELU_KOKKOS_REFACTOR

#define MUELU_AGGREGATES_KOKKOS_SHORT
#endif // MUELU_AGGREGATES_KOKKOS_DECL_HPP