/usr/include/dolfin/la/GenericPreconditioner.h is in libdolfin-dev 1.4.0+dfsg-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 | // Copyright (C) 2012 Garth N. Wells
//
// This file is part of DOLFIN.
//
// DOLFIN 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 3 of the License, or
// (at your option) any later version.
//
// DOLFIN 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 DOLFIN. If not, see <http://www.gnu.org/licenses/>.
//
// First added: 2012-11-09
// Last changed:
#ifndef __GENERIC_PRECONDITIONER_H
#define __GENERIC_PRECONDITIONER_H
#include <vector>
#include <dolfin/log/log.h>
namespace dolfin
{
// Forward declarations
class GenericVector;
class VectorSpaceBasis;
/// This class provides a common base preconditioners.
class GenericPreconditioner
{
public:
virtual ~GenericPreconditioner() {}
/// Set the (approximate) null space of the preconditioner operator
/// (matrix). This is required for certain preconditioner types,
/// e.g. smoothed aggregation multigrid
virtual void set_nullspace(const VectorSpaceBasis& nullspace)
{
dolfin_error("GenericPreconditioner.h",
"set nullspace for preconditioner operator",
"Not supported by current preconditioner type");
}
/// Set the coordinates of the operator (matrix) rows and geometric
/// dimension d. This is can be used by required for certain
/// preconditioners, e.g. ML. The input for this function can be
/// generated using GenericDofMap::tabulate_all_dofs.
virtual void set_coordinates(const std::vector<double>& x, std::size_t dim)
{
dolfin_error("GenericPreconditioner.h",
"set coordinates for preconditioner operator",
"Not supported by current preconditioner type");
}
};
}
#endif
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