MueLu_LWGraph_kokkos_decl.hpp

Go to the documentation of this file.

// @HEADER
//
// ***********************************************************************
//
//        MueLu: A package for multigrid based preconditioning
//                  Copyright 2012 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
//                    Jonathan Hu       (jhu@sandia.gov)
//                    Andrey Prokopenko (aprokop@sandia.gov)
//                    Ray Tuminaro      (rstumin@sandia.gov)
//
// ***********************************************************************
//
// @HEADER
#ifndef MUELU_LWGRAPH_KOKKOS_DECL_HPP
#define MUELU_LWGRAPH_KOKKOS_DECL_HPP

#include "MueLu_ConfigDefs.hpp"
#ifdef HAVE_MUELU_KOKKOS_REFACTOR

#include <Kokkos_StaticCrsGraph.hpp>
#include <KokkosCompat_ClassicNodeAPI_Wrapper.hpp>

#include <Xpetra_ConfigDefs.hpp>   // global_size_t
#include <Xpetra_Map.hpp>

#include "MueLu_LWGraph_kokkos_fwd.hpp"

#include "MueLu_Exceptions.hpp"

namespace MueLu {

  template<class LocalOrdinal, class GlobalOrdinal, class Node>
  class LWGraph_kokkos;

  // Partial specialization for DeviceType
  template<class LocalOrdinal, class GlobalOrdinal, class DeviceType>
  class LWGraph_kokkos<LocalOrdinal, GlobalOrdinal, Kokkos::Compat::KokkosDeviceWrapperNode<DeviceType>> {
  public:
    typedef LocalOrdinal                                             local_ordinal_type;
    typedef GlobalOrdinal                                            global_ordinal_type;
    typedef typename DeviceType::execution_space                     execution_space;
    typedef Kokkos::RangePolicy<local_ordinal_type, execution_space> range_type;
    typedef Kokkos::Compat::KokkosDeviceWrapperNode<DeviceType>      node_type;
    typedef size_t                                                   size_type;

    typedef Xpetra::Map<LocalOrdinal, GlobalOrdinal, node_type> map_type;
    typedef Kokkos::StaticCrsGraph<LocalOrdinal, Kokkos::LayoutLeft, execution_space> local_graph_type;
    typedef Kokkos::View<const bool*, DeviceType>               boundary_nodes_type;
    typedef Kokkos::View<const LocalOrdinal*, DeviceType>       row_type;

  private:
    // For compatibility
    typedef node_type                                           Node;
#undef MUELU_LWGRAPH_KOKKOS_SHORT
#include "MueLu_UseShortNamesOrdinal.hpp"

  public:



    //
    // @param[in] graph: local graph of type Kokkos::CsrStaticGraph containing CSR data
    // @param[in] domainMap: non-overlapping (domain) map for graph. Usually provided by AmalgamationFactory stored in UnAmalgamationInfo container
    // @param[in] importMap: overlapping map for graph. Usually provided by AmalgamationFactory stored in UnAmalgamationInfo container
    // @param[in] objectLabel: label string
    LWGraph_kokkos(const local_graph_type&    graph,
                   const RCP<const map_type>& domainMap,
                   const RCP<const map_type>& importMap,
                   const std::string&         objectLabel = "");

    ~LWGraph_kokkos() { }

    const RCP<const Teuchos::Comm<int> > GetComm() const {
      return domainMap_->getComm();
    }
    const RCP<const Map> GetDomainMap() const {
      return domainMap_;
    }
    const RCP<const Map> GetImportMap() const {
      return importMap_;
    }

    KOKKOS_INLINE_FUNCTION size_type GetNodeNumVertices() const {
      return graph_.numRows();
    }
    KOKKOS_INLINE_FUNCTION size_type GetNodeNumEdges() const {
      return graph_.row_map(GetNodeNumVertices());
    }

    KOKKOS_INLINE_FUNCTION row_type getNeighborVertices(LO i) const {
      auto rowPointers = graph_.row_map;
      auto colIndices  = graph_.entries;

      return Kokkos::subview(colIndices, Kokkos::make_pair<size_t,size_t>(rowPointers(i), rowPointers(i+1)));
    }

    KOKKOS_INLINE_FUNCTION bool isLocalNeighborVertex(LO i) const {
      return i >= minLocalIndex_ && i <= maxLocalIndex_;
    }

    KOKKOS_INLINE_FUNCTION void SetBoundaryNodeMap(const boundary_nodes_type bndry) {
      dirichletBoundaries_ = bndry;
    }

    KOKKOS_INLINE_FUNCTION size_type getNodeMaxNumRowEntries () const {
      return maxNumRowEntries_;
    }

    KOKKOS_INLINE_FUNCTION const boundary_nodes_type GetBoundaryNodeMap() const {
      return dirichletBoundaries_;
    }

    std::string description() const {
      return "LWGraph (" + objectLabel_ + ")";
    }

    // void print(Teuchos::FancyOStream &out, const VerbLevel verbLevel = Default) const;

  private:

    const local_graph_type      graph_;

    const RCP<const map_type>   domainMap_;
    const RCP<const map_type>   importMap_;

    boundary_nodes_type         dirichletBoundaries_;

    LO        minLocalIndex_, maxLocalIndex_;
    size_type maxNumRowEntries_;

    const std::string& objectLabel_;
  };

}

#define MUELU_LWGRAPH_KOKKOS_SHORT
#endif // HAVE_MUELU_KOKKOS_REFACTOR
#endif // MUELU_LWGRAPH_KOKKOS_DECL_HPP