twostep_time_solver.h

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// The libMesh Finite Element Library.
// Copyright (C) 2002-2024 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner

// This library is free software; you can 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.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.

// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA



#ifndef LIBMESH_TWOSTEP_TIME_SOLVER_H
#define LIBMESH_TWOSTEP_TIME_SOLVER_H

// Local includes
#include "libmesh/adaptive_time_solver.h"

// C++ includes

namespace libMesh
{

// Forward declarations
class System;

// UPDATE THIS DESCRIPTION

class TwostepTimeSolver : public AdaptiveTimeSolver
{
public:
  typedef AdaptiveTimeSolver Parent;

  explicit
  TwostepTimeSolver (sys_type & s);

  ~TwostepTimeSolver ();

  virtual void solve() override;

  virtual std::pair<unsigned int, Real> adjoint_solve (const QoISet & qoi_indices) override;

  virtual void integrate_qoi_timestep() override;

  virtual void integrate_adjoint_sensitivity(const QoISet & qois, const ParameterVector & parameter_vector, SensitivityData & sensitivities) override;

#ifdef LIBMESH_ENABLE_AMR

  virtual void integrate_adjoint_refinement_error_estimate(AdjointRefinementEstimator & adjoint_refinement_error_estimator, ErrorVector & QoI_elementwise_error) override;
#endif // LIBMESH_ENABLE_AMR

};


} // namespace libMesh


#endif // LIBMESH_TWOSTEP_TIME_SOLVER_H