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// ***********************************************************************
//
// EpetraExt: Epetra Extended - Linear Algebra Services Package
// Copyright (2011) Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
//
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// modification, are permitted provided that the following conditions are
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//
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// 2. Redistributions in binary form must reproduce the above copyright
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// documentation and/or other materials provided with the distribution.
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// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
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//@HEADER
#ifndef EPETRAEXT_RESTRICTEDCRSMATRIXWRAPPER_H
#define EPETRAEXT_RESTRICTEDCRSMATRIXWRAPPER_H
#include <EpetraExt_ConfigDefs.h>
#include <Teuchos_RCP.hpp>
#include <mpi.h>
#ifdef HAVE_MPI
class Epetra_Comm;
class Epetra_MpiComm;
class Epetra_Map;
class Epetra_CrsMatrix;
namespace EpetraExt {
class RestrictedCrsMatrixWrapper{
public:
RestrictedCrsMatrixWrapper();
~RestrictedCrsMatrixWrapper();
//! Set the MPI communicator corresponding to the restricted matrix.
/*! Sets the MPISubComm if it hasn't been set already.
\param MPI_Comm (In) An MPI_Comm object representing the subcommunicator.
\return Returns 0 if the SubComm hasn't ready been set , -1 if it has */
int SetMPISubComm(MPI_Comm MPI_SubComm);
//! Get the MPI communicator corresponding to the restricted matrix.
MPI_Comm GetMPISubComm(){return MPI_SubComm_;}
//! Get the Epetra communicator corresponding to the restricted matrix.
const Epetra_MpiComm & RestrictedComm(){return *RestrictedComm_;}
//! Notes whether or not the proc is active for the restricted matrix.
bool RestrictedProcIsActive(){return proc_is_active;}
//! Returns the input matrix.
Teuchos::RCP<Epetra_CrsMatrix> InputMatrix(){return input_matrix_;}
//! Returns the input matrix, restricted to the active procs.
Teuchos::RCP<Epetra_CrsMatrix> RestrictedMatrix(){return restricted_matrix_;}
//! Restricts the matrix.
/*! Restricts the matrix. If the MPISubComm is not set, restrict sets it to
include only the active processors and then restricts the matrix. If
MPISubComm is set in a fashion compatible with the existing matrix (aka all
procs with active rows must be in the subcomm), it
creates a matrix using that MPISubComm
\return 0 if sucessful, -1 if the input_matrix is deficient, and -2 if the
MPI_Comm object set with SetMPISubComm is not consistent with the input matrix.
*/
int restrict_comm(Teuchos::RCP<Epetra_CrsMatrix> input_matrix);
private:
bool proc_is_active;
bool subcomm_is_set;
MPI_Comm MPI_SubComm_;
Epetra_MpiComm *RestrictedComm_;
Epetra_Map *ResRowMap_;
Epetra_Map *ResColMap_;
Teuchos::RCP<Epetra_CrsMatrix> input_matrix_;
Teuchos::RCP<Epetra_CrsMatrix> restricted_matrix_;
template<typename int_type>
int Trestrict_comm(Teuchos::RCP<Epetra_CrsMatrix> input_matrix);
};
} // namespace EpetraExt
#endif
#endif /* EPETRAEXT_RESTRICTEDCRSMATRIXWRAPPER_H */
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