/usr/include/libmesh/petsc_diff_solver.h is in libmesh-dev 0.7.1-2ubuntu1.
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// The libMesh Finite Element Library.
// Copyright (C) 2002-2008 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 __petsc_diff_solver_h__
#define __petsc_diff_solver_h__
// C++ includes
// Local includes
#include "libmesh_common.h"
#include "diff_solver.h"
#ifdef LIBMESH_HAVE_PETSC
#include "petsc_macro.h"
EXTERN_C_FOR_PETSC_BEGIN
# include <petscsnes.h>
EXTERN_C_FOR_PETSC_END
namespace libMesh
{
/**
* This class defines a solver which uses a PETSc SNES
* context to handle a DifferentiableSystem
*
* This class is part of the new DifferentiableSystem framework,
* which is still experimental. Users of this framework should
* beware of bugs and future API changes.
*
* @author Roy H. Stogner 2008
*/
// ------------------------------------------------------------
// Solver class definition
class PetscDiffSolver : public DiffSolver
{
public:
/**
* Constructor. Requires a reference to the system
* to be solved.
*/
PetscDiffSolver (sys_type& system);
/**
* Destructor.
*/
virtual ~PetscDiffSolver ();
typedef DiffSolver Parent;
/**
* The reinitialization function. This method is used after
* changes in the mesh.
*/
virtual void reinit ();
/**
* The initialization function. solve() calls this to create
* a new SNES context.
*/
void init ();
/**
* The clear function. solve() calls this to destroy
* a used SNES context.
*/
void clear ();
/**
* This method performs a solve. What occurs in
* this method will depend on the PETSc SNES settings.
* See the PETSc documentation for more details.
*/
virtual unsigned int solve ();
protected:
/**
* Nonlinear solver context
*/
SNES _snes;
};
} // namespace libMesh
#endif // #ifdef LIBMESH_HAVE_PETSC
#endif // #define __petsc_diff_solver_h__
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