BelosGmresIteration.hpp

Go to the documentation of this file.

//@HEADER
// ************************************************************************
//
//                 Belos: Block Linear Solvers Package
//                  Copyright 2004 Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
//
// ************************************************************************
//@HEADER

#ifndef BELOS_GMRES_ITERATION_HPP
#define BELOS_GMRES_ITERATION_HPP

#include "BelosConfigDefs.hpp"
#include "BelosTypes.hpp"
#include "BelosIteration.hpp"

namespace Belos {


  
  template <class ScalarType, class MV>
  struct GmresIterationState {
    int curDim;

    Teuchos::RCP<const MV> V;

    Teuchos::RCP<const MV> Z;

    Teuchos::RCP<const Teuchos::SerialDenseMatrix<int,ScalarType> > H;
    Teuchos::RCP<const Teuchos::SerialDenseMatrix<int,ScalarType> > R;
    Teuchos::RCP<const Teuchos::SerialDenseMatrix<int,ScalarType> > z;
    

    GmresIterationState() : curDim(0), V(Teuchos::null), Z(Teuchos::null),
          H(Teuchos::null), R(Teuchos::null), 
          z(Teuchos::null)
    {}
  };



  
  class GmresIterationInitFailure : public BelosError {public:
    GmresIterationInitFailure(const std::string& what_arg) : BelosError(what_arg)
    {}};

  class GmresIterationOrthoFailure : public BelosError {public:
    GmresIterationOrthoFailure(const std::string& what_arg) : BelosError(what_arg)
    {}};

  class GmresIterationLAPACKFailure : public BelosError {public:
    GmresIterationLAPACKFailure(const std::string& what_arg) : BelosError(what_arg)
    {}};
  


template<class ScalarType, class MV, class OP>
class GmresIteration : virtual public Iteration<ScalarType,MV,OP> {

  public:



  virtual void initializeGmres(GmresIterationState<ScalarType,MV> newstate) = 0;

  virtual GmresIterationState<ScalarType,MV> getState() const = 0;




  virtual void updateLSQR( int dim = -1 ) = 0;

  virtual int getCurSubspaceDim() const = 0; 

  virtual int getMaxSubspaceDim() const = 0;




  virtual void setSize(int blockSize, int numBlocks) = 0;


};

} // end Belos namespace

#endif /* BELOS_GMRES_ITERATION_HPP */