solution_transfer.h

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// ---------------------------------------------------------------------
//
// Copyright (C) 2009 - 2022 by the deal.II authors
//
// This file is part of the deal.II library.
//
// The deal.II library is free software; you can use it, redistribute
// it, and/or modify it under the terms of the GNU Lesser General
// Public License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// The full text of the license can be found in the file LICENSE.md at
// the top level directory of deal.II.
//
// ---------------------------------------------------------------------
 
#ifndef dealii_distributed_solution_transfer_h
#define dealii_distributed_solution_transfer_h
 
#include <deal.II/base/config.h>
 
#include <deal.II/distributed/tria.h>
 
#include <deal.II/dofs/dof_handler.h>
 
#include <vector>
 
 
DEAL_II_NAMESPACE_OPEN
 
namespace parallel
{
  namespace distributed
  {
    template <int dim, typename VectorType, int spacedim = dim>
    class SolutionTransfer
    {
    public:
      SolutionTransfer(const DoFHandler<dim, spacedim> &dof_handler,
                       const bool                       average_values = false);
 
      ~SolutionTransfer() = default;
 
      void
      prepare_for_coarsening_and_refinement(
        const std::vector<const VectorType *> &all_in);
 
      void
      prepare_for_coarsening_and_refinement(const VectorType &in);
 
      void
      interpolate(std::vector<VectorType *> &all_out);
 
      void
      interpolate(VectorType &out);
 
      void
      prepare_for_serialization(const VectorType &in);
 
      void
      prepare_for_serialization(const std::vector<const VectorType *> &all_in);
 
      void
      deserialize(VectorType &in);
 
 
      void
      deserialize(std::vector<VectorType *> &all_in);
 
    private:
      SmartPointer<const DoFHandler<dim, spacedim>,
                   SolutionTransfer<dim, VectorType, spacedim>>
        dof_handler;
 
      const bool average_values;
 
      std::vector<const VectorType *> input_vectors;
 
      unsigned int handle;
 
      std::vector<char>
      pack_callback(
        const typename Triangulation<dim, spacedim>::cell_iterator &cell,
        const typename Triangulation<dim, spacedim>::CellStatus     status);
 
      void
      unpack_callback(
        const typename Triangulation<dim, spacedim>::cell_iterator &cell,
        const typename Triangulation<dim, spacedim>::CellStatus     status,
        const boost::iterator_range<std::vector<char>::const_iterator>
          &                        data_range,
        std::vector<VectorType *> &all_out,
        VectorType &               valence);
 
 
      void
      register_data_attach();
    };
  } // namespace distributed
} // namespace parallel
 
 
DEAL_II_NAMESPACE_CLOSE
 
#endif