84 lines
2.7 KiB
C++
84 lines
2.7 KiB
C++
/*@HEADER
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// ***********************************************************************
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//
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// Ifpack: Object-Oriented Algebraic Preconditioner Package
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// Copyright (2002) Sandia Corporation
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//
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// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
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// license for use of this work by or on behalf of the U.S. Government.
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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// USA
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// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
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//
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// ***********************************************************************
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//@HEADER
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*/
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#ifndef IFPACK_EQUATIONPARTITIONER_H
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#define IFPACK_EQUATIONPARTITIONER_H
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#include "Ifpack_ConfigDefs.h"
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#include "Ifpack_Partitioner.h"
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#include "Ifpack_OverlappingPartitioner.h"
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#include "Teuchos_ParameterList.hpp"
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class Epetra_Comm;
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class Ifpack_Graph;
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class Epetra_Map;
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class Epetra_BlockMap;
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class Epetra_Import;
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//! Ifpack_EquationPartitioner: A class to decompose an Ifpack_Graph so that each block will contain all the rows for a different equation.
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/*!
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Ifpack_EquationPartitioner enables a decomposition into blocks of equations.
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Suppose that the input Ifpack_Graph is based on an Epetra_RowMatrix, whose
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rows represent (U_i,V_i,P_i) for each grid node i. This partitioner
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will decompose the graph into three subgraphs, each of them containing
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the rows of U, then V, than P.
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The number of equations is set as the number of local partitions.
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\note It is required that NumRows % NumLocalParts() = 0.
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\date Sep-04.
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*/
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class Ifpack_EquationPartitioner : public Ifpack_OverlappingPartitioner {
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public:
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//! Constructor.
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Ifpack_EquationPartitioner(const Ifpack_Graph* Graph) :
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Ifpack_OverlappingPartitioner(Graph)
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{}
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//! Destructor.
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virtual ~Ifpack_EquationPartitioner() {};
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//! Sets all the parameters for the partitioner.
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int SetPartitionParameters(Teuchos::ParameterList& List)
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{
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return(0);
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}
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//! Computes the partitions. Returns 0 if successful.
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int ComputePartitions();
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private:
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};
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#endif // IFPACK_EQUATIONPARTITIONER_H
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