Panzer_SubcellConnectivity.hpp

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//           Panzer: A partial differential equation assembly
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#ifndef PANZER_SUBCELL_CONNECTIVITY_HPP
#define PANZER_SUBCELL_CONNECTIVITY_HPP

#include "PanzerCore_config.hpp"
#include "Kokkos_View.hpp"
#include "Phalanx_KokkosDeviceTypes.hpp"
#include "Teuchos_Assert.hpp"

namespace panzer {

template <typename LO, typename GO>
struct LocalMeshPartition;

class SubcellConnectivity
{
public:

  SubcellConnectivity():_num_subcells(-1),_num_cells(-1){}

  ~SubcellConnectivity() = default;

  KOKKOS_INLINE_FUNCTION
  int numSubcells() const {return _num_subcells;}

  KOKKOS_INLINE_FUNCTION
  int numCells() const {return _num_cells;}

  KOKKOS_INLINE_FUNCTION
  int numSubcellsOnCell(const int cell) const;

  KOKKOS_INLINE_FUNCTION
  int numCellsOnSubcell(const int subcell) const;

  KOKKOS_INLINE_FUNCTION
  int subcellForCell(const int cell, const int local_subcell_index) const;

  KOKKOS_INLINE_FUNCTION
  int cellForSubcell(const int subcell, const int local_cell_index) const;

  KOKKOS_INLINE_FUNCTION
  int localSubcellForSubcell(const int subcell, const int local_cell_index) const;

protected:

  int _num_subcells;

  int _num_cells;

  Kokkos::View<int*, PHX::Device> _subcell_to_cells_adj;

  Kokkos::View<int*, PHX::Device> _subcell_to_cells;

  Kokkos::View<int*, PHX::Device> _subcell_to_local_subcells;

  Kokkos::View<int*, PHX::Device> _cell_to_subcells_adj;

  Kokkos::View<int*, PHX::Device> _cell_to_subcells;

};

class FaceConnectivity:
    public SubcellConnectivity
{
public:

  FaceConnectivity() = default;

  ~FaceConnectivity() = default;

  void setup(const panzer::LocalMeshPartition<int,panzer::Ordinal64> & partition);

};

// **********************************
// Inlined functions
// **********************************

int
SubcellConnectivity::
numSubcellsOnCell(const int cell) const
{
#ifdef PANZER_DEBUG
#ifndef KOKKOS_ENABLE_CUDA
  TEUCHOS_ASSERT(cell >= 0 and cell < _num_cells);
#endif
#endif
  return _cell_to_subcells_adj(cell+1)-_cell_to_subcells_adj(cell);
}

int
SubcellConnectivity::
numCellsOnSubcell(const int subcell) const
{
#ifdef PANZER_DEBUG
#ifndef KOKKOS_ENABLE_CUDA
  TEUCHOS_ASSERT(subcell >= 0 and subcell < _num_subcells);
#endif
#endif
  return _subcell_to_cells_adj(subcell+1)-_subcell_to_cells_adj(subcell);
}

int
SubcellConnectivity::
subcellForCell(const int cell, const int local_subcell_index) const
{
#ifdef PANZER_DEBUG
#ifndef KOKKOS_ENABLE_CUDA
  TEUCHOS_ASSERT(cell >= 0 and cell < _num_cells);
  TEUCHOS_ASSERT(local_subcell_index < numSubcellsOnCell(cell));
#endif
#endif
  const int index = _cell_to_subcells_adj(cell)+local_subcell_index;
  return _cell_to_subcells(index);
}

int
SubcellConnectivity::
cellForSubcell(const int subcell, const int local_cell_index) const
{
#ifdef PANZER_DEBUG
#ifndef KOKKOS_ENABLE_CUDA
  TEUCHOS_ASSERT(subcell >= 0 and subcell < _num_subcells);
  TEUCHOS_ASSERT(local_cell_index < numCellsOnSubcell(subcell));
#endif
#endif
  const int index = _subcell_to_cells_adj(subcell)+local_cell_index;
  return _subcell_to_cells(index);
}

int
SubcellConnectivity::
localSubcellForSubcell(const int subcell, const int local_cell_index) const
{
#ifdef PANZER_DEBUG
#ifndef KOKKOS_ENABLE_CUDA
  TEUCHOS_ASSERT(subcell >= 0 and subcell < _num_subcells);
  TEUCHOS_ASSERT(local_cell_index < numCellsOnSubcell(subcell));
#endif
#endif
  const int index = _subcell_to_cells_adj(subcell)+local_cell_index;
  return _subcell_to_local_subcells(index);
}

} // namespace panzer

#endif