.. _program_listing_file_src_pcms_field_layout_mfem.hpp:

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

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

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

.. code-block:: cpp

   #ifndef PCMS_FIELD_LAYOUT_MFEM_HPP
   #define PCMS_FIELD_LAYOUT_MFEM_HPP
   
   #include "pcms/field/coordinate_system.hpp"
   #include "pcms/field/field_layout.h"
   
   #include <mfem.hpp>
   
   #include <memory>
   
   namespace pcms
   {
   
   // Field layout for an MFEM order-1 H1 (vertex) scalar field.
   class MFEMLayout : public FieldLayout
   {
   public:
     MFEMLayout(mfem::ParMesh& pmesh, mfem::ParFiniteElementSpace& pfes,
                std::shared_ptr<const CoordinateSystem> coordinate_system);
   
     std::shared_ptr<const Discretization> GetDiscretization()
       const noexcept override;
   
     int GetNumComponents() const override;
     LO GetNumOwnedDofHolder() const override;
     GO GetNumGlobalDofHolder() const override;
   
     Rank1View<const bool, HostMemorySpace> GetOwnedHost() const override;
     GlobalIDView<HostMemorySpace> GetGidsHost() const override;
     CoordinateView<DeviceMemorySpace> GetDOFHolderCoordinates() const override;
   
     [[nodiscard]] bool IsDistributed() const override;
     EntOffsetsArray GetEntOffsets() const override;
     int GetDimension() const override;
   
     Rank1View<const LO, HostMemorySpace>
     GetDOFHolderClassificationDimensionsHost() const override;
   
     Rank1View<const LO, HostMemorySpace> GetDOFHolderClassificationIdsHost()
       const override;
   
     mfem::ParMesh& GetMesh() const noexcept { return pmesh_; }
     mfem::ParFiniteElementSpace& GetFESpace() const noexcept { return pfes_; }
   
     // Build a per-vertex overlap mask from MFEM element attributes
     static Kokkos::View<bool*, HostMemorySpace> OverlapMaskFromAttribute(
       mfem::ParMesh& pmesh, int attribute);
   
   private:
     void AssertVertexScalarSpace() const;
   
     mfem::ParMesh& pmesh_;
     mfem::ParFiniteElementSpace& pfes_;
     int dim_;
   
     Kokkos::View<Real**, DeviceMemorySpace> coords_;
     Kokkos::View<bool*, HostMemorySpace> owned_host_;
     Kokkos::View<GO*, HostMemorySpace> gids_host_;
     Kokkos::View<LO*, HostMemorySpace> classification_dims_host_;
     Kokkos::View<LO*, HostMemorySpace> classification_ids_host_;
     std::shared_ptr<const Discretization> discretization_;
   };
   
   } // namespace pcms
   
   #endif // PCMS_FIELD_LAYOUT_MFEM_HPP