Panzer_Integrator_DivBasisTimesScalar.hpp

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#ifndef   __Panzer_Integrator_DivBasisTimesScalar_hpp__
#define   __Panzer_Integrator_DivBasisTimesScalar_hpp__

//
//  Include Files
//

// C++
#include <string>

// Kokkos
#include "Kokkos_DynRankView.hpp"

// Panzer
#include "Panzer_Evaluator_WithBaseImpl.hpp"
#include "Panzer_EvaluatorStyle.hpp"

// Phalanx
#include "Phalanx_Evaluator_Derived.hpp"
#include "Phalanx_MDField.hpp"

namespace panzer
{
  template<typename EvalT, typename Traits>
  class Integrator_DivBasisTimesScalar
    :
    public panzer::EvaluatorWithBaseImpl<Traits>,
    public PHX::EvaluatorDerived<EvalT, Traits>
  {
    public:

      Integrator_DivBasisTimesScalar(
        const panzer::EvaluatorStyle&   evalStyle,
        const std::string&              resName,
        const std::string&              valName,
        const panzer::BasisIRLayout&    basis,
        const panzer::IntegrationRule&  ir,
        const double&                   multiplier = 1,
        const std::vector<std::string>& fmNames    =
          std::vector<std::string>());

      Integrator_DivBasisTimesScalar(
        const Teuchos::ParameterList& p);

      void
      postRegistrationSetup(
        typename Traits::SetupData d,
        PHX::FieldManager<Traits>& fm);

      void
      evaluateFields(
        typename Traits::EvalData d);

      template<int NUM_FIELD_MULT>
      struct FieldMultTag
      {
      }; // end of struct FieldMultTag

      template<int NUM_FIELD_MULT>
      struct SharedFieldMultTag
      {
      }; // end of struct FieldMultTag

      template<int NUM_FIELD_MULT>
      KOKKOS_INLINE_FUNCTION
      void
      operator()(
        const FieldMultTag<NUM_FIELD_MULT>& tag,
        const Kokkos::TeamPolicy<PHX::exec_space>::member_type& team) const;

      template<int NUM_FIELD_MULT>
      KOKKOS_INLINE_FUNCTION
      void
      operator()(
        const SharedFieldMultTag<NUM_FIELD_MULT>& tag,
        const Kokkos::TeamPolicy<PHX::exec_space>::member_type& team) const;

    private:

      Teuchos::RCP<Teuchos::ParameterList> getValidParameters() const;

      using ScalarT = typename EvalT::ScalarT;

    using scratch_view = Kokkos::View<ScalarT* ,typename PHX::DevLayout<ScalarT>::type,typename PHX::exec_space::scratch_memory_space,Kokkos::MemoryUnmanaged>;

      const panzer::EvaluatorStyle evalStyle_;

      PHX::MDField<ScalarT, Cell, BASIS> field_;

      PHX::MDField<const ScalarT, Cell, IP> scalar_;

      double multiplier_;

      std::vector<PHX::MDField<const ScalarT, Cell, IP>> fieldMults_;

    PHX::View<PHX::UnmanagedView<const ScalarT**>*> kokkosFieldMults_;

      std::size_t numQP_;

      std::string basisName_;

      std::size_t basisIndex_;

      PHX::MDField<double, panzer::Cell, panzer::BASIS, panzer::IP> basis_;

      bool use_shared_memory;

    PHX::View<ScalarT*> tmp_;

  }; // end of class Integrator_DivBasisTimesScalar

} // end of namespace panzer

#endif // __Panzer_Integrator_DivBasisTimesScalar_hpp__