.. _program_listing_file_src_pcms_field_data_mfem.hpp:

Program Listing for File mfem.hpp
=================================

|exhale_lsh| :ref:`Return to documentation for file <file_src_pcms_field_data_mfem.hpp>` (``src/pcms/field/data/mfem.hpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   #ifndef PCMS_FIELD_DATA_MFEM_HPP
   #define PCMS_FIELD_DATA_MFEM_HPP
   
   #include "pcms/field/field_data.h"
   #include "pcms/field/value_view.hpp"
   #include "pcms/utility/arrays.h"
   
   #include <mfem.hpp>
   
   namespace pcms
   {
   
   // FieldData backend for an MFEM order-1 H1 (vertex) scalar field.
   class MFEMVertexFieldData
     : public FieldData<Real>
     , public DOFAccess<Real>
   {
   public:
     MFEMVertexFieldData(mfem::ParFiniteElementSpace& pfes,
                         mfem::ParGridFunction& gf, ValueBasis basis = {});
   
     FieldValueType GetValueType() const override;
     const ValueBasis& GetValueBasis() const override;
   
     const DOFAccess<Real>* GetDOFAccess() const noexcept override { return this; }
     DOFAccess<Real>* GetDOFAccess() noexcept override { return this; }
   
     Rank2View<const Real, DeviceMemorySpace> GetOwnedValues() const override;
     void SetOwnedValues(Rank2View<const Real, DeviceMemorySpace> data) override;
   
   private:
     Rank2View<const Real, HostMemorySpace> GatherHost() const;
     void ScatterHost(Rank2View<const Real, HostMemorySpace> data);
   
     mfem::ParFiniteElementSpace& pfes_;
     mfem::ParGridFunction& gf_;
     ValueBasis basis_;
     mutable Kokkos::View<Real**, HostMemorySpace> host_data_;
     mutable Kokkos::View<Real**, DeviceMemorySpace> device_data_;
   };
   
   } // namespace pcms
   
   #endif // PCMS_FIELD_DATA_MFEM_HPP