Panzer_Integrator_BasisTimesVector.hpp

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// @HEADER
// *****************************************************************************
//           Panzer: A partial differential equation assembly
//       engine for strongly coupled complex multiphysics systems
//
// Copyright 2011 NTESS and the Panzer contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#ifndef   __Panzer_Integerator_BasisTimesVector_decl_hpp__
#define   __Panzer_Integerator_BasisTimesVector_decl_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_BasisTimesVector
    :
    public panzer::EvaluatorWithBaseImpl<Traits>,
    public PHX::EvaluatorDerived<EvalT, Traits>
  {
    public:

      Integrator_BasisTimesVector(
        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_BasisTimesVector(
        const Teuchos::ParameterList& p);

      Integrator_BasisTimesVector(
        const panzer::EvaluatorStyle&                         evalStyle,
        const PHX::FieldTag&                                  resTag,
        const PHX::FieldTag&                                  valTag,
        const BasisDescriptor&                                bd,
        const IntegrationDescriptor&                          id,
        const double&                                         multiplier  = 1,
        const std::vector<PHX::FieldTag>& multipliers =
          std::vector<PHX::FieldTag>());

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

      void
      evaluateFields(
        typename Traits::EvalData workset);

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

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

    private:

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

      using ScalarT = typename EvalT::ScalarT;

      const panzer::EvaluatorStyle evalStyle_;

      bool useDescriptors_;

      BasisDescriptor bd_;

      IntegrationDescriptor id_;

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

      PHX::MDField<const ScalarT, panzer::Cell, panzer::IP, panzer::Dim>
      vector_;

      double multiplier_;

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

      Kokkos::Array<Kokkos::View<const ScalarT**, typename PHX::DevLayout<ScalarT>::type, Kokkos::MemoryUnmanaged>,3> kokkosFieldMults_;

      int numQP_;

      int numDim_;

      std::string basisName_;

      std::size_t basisIndex_;

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

  }; // end of class Integrator_BasisTimesVector

} // end of namespace panzer

#endif // __Panzer_Integerator_BasisTimesVector_decl_hpp__