MueLu_AggregationPhase1Algorithm_kokkos_decl.hpp

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#ifndef MUELU_AGGREGATIONPHASE1ALGORITHM_KOKKOS_DECL_HPP
#define MUELU_AGGREGATIONPHASE1ALGORITHM_KOKKOS_DECL_HPP

#include "MueLu_ConfigDefs.hpp"
#ifdef HAVE_MUELU_KOKKOS_REFACTOR

#include <KokkosCompat_ClassicNodeAPI_Wrapper.hpp>

#include "MueLu_AggregationPhase1Algorithm_kokkos_fwd.hpp"

#include "MueLu_Aggregates_kokkos_fwd.hpp"
#include "MueLu_AggregationAlgorithmBase_kokkos.hpp"
#include "MueLu_FactoryBase_fwd.hpp"
#include "MueLu_LWGraph_kokkos.hpp"

namespace MueLu {
  template <class LocalOrdinal = int,
            class GlobalOrdinal = LocalOrdinal,
            class Node = KokkosClassic::DefaultNode::DefaultNodeType>
  class AggregationPhase1Algorithm_kokkos :
    public MueLu::AggregationAlgorithmBase_kokkos<LocalOrdinal,GlobalOrdinal,Node> {
#undef MUELU_AGGREGATIONPHASE1ALGORITHM_KOKKOS_SHORT
#include "MueLu_UseShortNamesOrdinal.hpp"

  public:


    AggregationPhase1Algorithm_kokkos(const RCP<const FactoryBase>& /* graphFact */ = Teuchos::null) { }

    virtual ~AggregationPhase1Algorithm_kokkos() { }





    void BuildAggregates(const ParameterList& params, const LWGraph_kokkos& graph, Aggregates_kokkos& aggregates, std::vector<unsigned>& aggStat, LO& numNonAggregatedNodes) const;

    void BuildAggregatesSerial(const LWGraph_kokkos& graph, Aggregates_kokkos& aggregates,
      std::vector<unsigned>& aggStat, LO& numNonAggregatedNodes,
      LO minNodesPerAggregate, LO maxNodesPerAggregate,
      LO maxNeighAlreadySelected, std::string& orderingStr) const;

    void BuildAggregatesDistance2(const LWGraph_kokkos& graph, Aggregates_kokkos& aggregates,
        std::vector<unsigned>& aggStat, LO& numNonAggregatedNodes, LO maxAggSize) const;

    std::string description() const { return "Phase 1 (main)"; }

    enum struct Algorithm
    {
      Serial,
      Distance2 
    };

    static Algorithm algorithmFromName(const std::string& name)
    {
      if(name == "Distance2")
        return Algorithm::Distance2;
      return Algorithm::Serial;
    }

  private:

    void RandomReorder(ArrayRCP<LO> list) const;

    int RandomOrdinal(int min, int max) const;

  };

} //namespace MueLu

#define MUELU_AGGREGATIONPHASE1ALGORITHM_KOKKOS_SHORT
#endif // HAVE_MUELU_KOKKOS_REFACTOR
#endif // MUELU_AGGREGATIONPHASE1ALGORITHM_KOKKOS_DECL_HPP