trilinos_epetra_communication_pattern.h

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// ------------------------------------------------------------------------
//
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2016 - 2024 by the deal.II authors
//
// This file is part of the deal.II library.
//
// Part of the source code is dual licensed under Apache-2.0 WITH
// LLVM-exception OR LGPL-2.1-or-later. Detailed license information
// governing the source code and code contributions can be found in
// LICENSE.md and CONTRIBUTING.md at the top level directory of deal.II.
//
// ------------------------------------------------------------------------
 
#ifndef dealii_trilinos_epetra_communication_pattern_h
#define dealii_trilinos_epetra_communication_pattern_h
 
 
#include <deal.II/base/config.h>
 
#ifdef DEAL_II_WITH_TRILINOS
 
#  include <deal.II/base/communication_pattern_base.h>
 
DEAL_II_DISABLE_EXTRA_DIAGNOSTICS
#  include <Epetra_Import.h>
DEAL_II_ENABLE_EXTRA_DIAGNOSTICS
 
#  include <memory>
 
DEAL_II_NAMESPACE_OPEN
 
namespace LinearAlgebra
{
  namespace EpetraWrappers
  {
    class CommunicationPattern : public Utilities::MPI::CommunicationPatternBase
    {
    public:
      CommunicationPattern(const IndexSet &locally_owned_indices,
                           const IndexSet &ghost_indices,
                           const MPI_Comm  communicator);

      virtual void
      reinit(const IndexSet &locally_owned_indices,
             const IndexSet &ghost_indices,
             const MPI_Comm  communicator) override;

      virtual MPI_Comm
      get_mpi_communicator() const override;

      const Epetra_Import &
      get_epetra_import() const;
 
    private:
      std::shared_ptr<const MPI_Comm> comm;

      std::unique_ptr<Epetra_Import> importer;
    };
  } // end of namespace EpetraWrappers
} // end of namespace LinearAlgebra
 
DEAL_II_NAMESPACE_CLOSE
 
#else
 
// Make sure the scripts that create the C++20 module input files have
// something to latch on if the preprocessor #ifdef above would
// otherwise lead to an empty content of the file.
DEAL_II_NAMESPACE_OPEN
DEAL_II_NAMESPACE_CLOSE
 
#endif
 
#endif