ilu.h

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// ---------------------------------------------------------------------
//
// Copyright (C) 2022 by Luca Heltai
//
// This file is part of the FSI-suite platform, based on the deal.II library.
//
// The FSI-suite platform 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 3.0 of the License,
// or (at your option) any later version. The full text of the license can be
// found in the file LICENSE at the top level of the FSI-suite platform
// distribution.
//
// ---------------------------------------------------------------------
 
 
 
#ifndef ilu_preconditioner_h
#define ilu_preconditioner_h
 
#include <deal.II/base/config.h>
 
 
 
#ifdef DEAL_II_WITH_TRILINOS
 
#  include <deal.II/base/parameter_acceptor.h>
 
#  include <deal.II/lac/trilinos_precondition.h>
 
namespace ParsedLAC
{
  class ILUPreconditioner : public dealii::ParameterAcceptor,
                            public dealii::TrilinosWrappers::PreconditionILU
  {
  public:
    ILUPreconditioner(const std::string  &name     = "",
                      const unsigned int &ilu_fill = 0,
                      const double       &ilu_atol = 0.0,
                      const double       &ilu_rtol = 1.0,
                      const unsigned int &overlap  = 0);
 
    template <typename Matrix>
    void
    initialize_preconditioner(const Matrix &matrix);
 
    using dealii::TrilinosWrappers::PreconditionILU::initialize;
 
  private:
    void
    add_parameters();
 
    unsigned int ilu_fill;
 
    double ilu_atol;
 
    double ilu_rtol;
 
    unsigned int overlap;
  };
 
} // namespace ParsedLAC
 
#endif // DEAL_II_WITH_TRILINOS
 
#endif