MueLu_ZoltanInterface_decl.hpp

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// @HEADER
// *****************************************************************************
//        MueLu: A package for multigrid based preconditioning
//
// Copyright 2012 NTESS and the MueLu contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#ifndef MUELU_ZOLTANINTERFACE_DECL_HPP
#define MUELU_ZOLTANINTERFACE_DECL_HPP

#include "MueLu_ConfigDefs.hpp"

#if defined(HAVE_MUELU_ZOLTAN) && defined(HAVE_MPI)

#include <zoltan_cpp.h>

#include <Xpetra_Matrix_fwd.hpp>
#include <Xpetra_VectorFactory_fwd.hpp>

#include "MueLu_SingleLevelFactoryBase.hpp"
#include "MueLu_ZoltanInterface_fwd.hpp"

#include "MueLu_Level_fwd.hpp"
#include "MueLu_FactoryBase_fwd.hpp"

namespace MueLu {

// FIXME: this class should not be templated
template <class Scalar,
          class LocalOrdinal  = DefaultLocalOrdinal,
          class GlobalOrdinal = DefaultGlobalOrdinal,
          class Node          = DefaultNode>
class ZoltanInterface : public SingleLevelFactoryBase {
#undef MUELU_ZOLTANINTERFACE_SHORT
#include "MueLu_UseShortNames.hpp"

 public:


  ZoltanInterface() {}

  virtual ~ZoltanInterface() {}

  RCP<const ParameterList> GetValidParameterList() const;


  void DeclareInput(Level &level) const;


  void Build(Level &level) const;




  static int GetLocalNumberOfRows(void *data, int *ierr);

  static void GetLocalNumberOfNonzeros(void *data, int NumGidEntries, int NumLidEntries, ZOLTAN_ID_PTR gids,
                                       ZOLTAN_ID_PTR lids, int wgtDim, float *weights, int *ierr);

  static int GetProblemDimension(void *data, int *ierr);

  static void GetProblemGeometry(void *data, int numGIDEntries, int numLIDEntries, int numObjectIDs,
                                 ZOLTAN_ID_PTR gids, ZOLTAN_ID_PTR lids, int dim, double *coordinates, int *ierr);


 private:
  static ArrayRCP<typename Teuchos::ScalarTraits<Scalar>::magnitudeType> coalesceCoordinates(ArrayRCP<typename Teuchos::ScalarTraits<Scalar>::magnitudeType> coord, LocalOrdinal blksize);

};  // class ZoltanInterface

}  // namespace MueLu

#define MUELU_ZOLTANINTERFACE_SHORT
#endif  // if defined(HAVE_MUELU_ZOLTAN) && defined(HAVE_MPI)

#endif  // MUELU_ZOLTANINTERFACE_DECL_HPP