/usr/include/libmesh/laspack_linear_solver.h is in libmesh-dev 0.7.1-2ubuntu1.
This file is owned by root:root, with mode 0o644.
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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 __laspack_linear_solver_h__
#define __laspack_linear_solver_h__
#include "libmesh_common.h"
#if defined(LIBMESH_HAVE_LASPACK)
//#if defined(LIBMESH_HAVE_LASPACK) && !defined(LIBMESH_USE_COMPLEX_NUMBERS)
// C++ includes
// Local includes
#include "linear_solver.h"
#include "laspack_vector.h"
#include "laspack_matrix.h"
#include <itersolv.h>
#include <rtc.h>
#include <errhandl.h>
namespace libMesh
{
/**
* This class provides an interface to Laspack
* iterative solvers that is compatible with the \p libMesh
* \p LinearSolver<>
*
* @author Benjamin Kirk, 2002-2007
*/
template <typename T>
class LaspackLinearSolver : public LinearSolver<T>
{
public:
/**
* Constructor. Initializes Laspack data structures
*/
LaspackLinearSolver ();
/**
* Destructor.
*/
~LaspackLinearSolver ();
/**
* Release all memory and clear data structures.
*/
void clear ();
/**
* Initialize data structures if not done so already.
*/
void init ();
/**
* Call the Laspack solver
*/
std::pair<unsigned int, Real>
solve (SparseMatrix<T> &matrix,
NumericVector<T> &solution,
NumericVector<T> &rhs,
const double tol,
const unsigned int m_its);
/**
* Call the Laspack solver
*/
std::pair<unsigned int, Real>
solve (SparseMatrix<T> &matrix,
SparseMatrix<T> &pc,
NumericVector<T> &solution,
NumericVector<T> &rhs,
const double tol,
const unsigned int m_its);
/**
* This function solves a system whose matrix is a shell matrix.
*/
std::pair<unsigned int, Real>
solve (const ShellMatrix<T>& shell_matrix,
NumericVector<T>& solution_in,
NumericVector<T>& rhs_in,
const double tol,
const unsigned int m_its);
/**
* This function solves a system whose matrix is a shell matrix, but
* a sparse matrix is used as preconditioning matrix, this allowing
* other preconditioners than JACOBI.
*/
virtual std::pair<unsigned int, Real>
solve (const ShellMatrix<T>& shell_matrix,
const SparseMatrix<T>& precond_matrix,
NumericVector<T>& solution_in,
NumericVector<T>& rhs_in,
const double tol,
const unsigned int m_its);
/**
* Prints a useful message about why the latest linear solve
* con(di)verged.
*/
virtual void print_converged_reason();
private:
/**
* Tells LASPACK to use the user-specified preconditioner stored in
* \p _preconditioner_type
*/
void set_laspack_preconditioner_type ();
/**
* Preconditioner type
*/
PrecondProcType _precond_type;
};
/*----------------------- functions ----------------------------------*/
template <typename T>
inline
LaspackLinearSolver<T>::LaspackLinearSolver () :
_precond_type (ILUPrecond)
{
}
template <typename T>
inline
LaspackLinearSolver<T>::~LaspackLinearSolver ()
{
this->clear ();
}
template <typename T>
inline
std::pair<unsigned int, Real>
LaspackLinearSolver<T>::solve (SparseMatrix<T>&,
SparseMatrix<T>&,
NumericVector<T>&,
NumericVector<T>&,
const double,
const unsigned int)
{
libMesh::err << "ERROR: LASPACK does not support a user-supplied preconditioner!"
<< std::endl;
libmesh_error();
std::pair<unsigned int, Real> p;
return p;
}
} // namespace libMesh
#endif // #ifdef LIBMESH_HAVE_LASPACK
#endif // #ifndef __laspack_linear_solver_h__
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