Zoltan2_BasicKokkosIdentifierAdapter.hpp

Go to the documentation of this file.

// @HEADER
//
// ***********************************************************************
//
//   Zoltan2: A package of combinatorial algorithms for scientific computing
//                  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 Karen Devine      (kddevin@sandia.gov)
//                    Erik Boman        (egboman@sandia.gov)
//                    Siva Rajamanickam (srajama@sandia.gov)
//
// ***********************************************************************
//
// @HEADER
 
#ifndef _ZOLTAN2_BASICKOKKOSIDENTIFIERADAPTER_HPP_
#define _ZOLTAN2_BASICKOKKOSIDENTIFIERADAPTER_HPP_
 
#include <Kokkos_Core.hpp>
#include <Zoltan2_IdentifierAdapter.hpp>
#include <Zoltan2_StridedData.hpp>
 
using Kokkos::ALL;
 
namespace Zoltan2 {
 
template <typename User>
  class BasicKokkosIdentifierAdapter: public IdentifierAdapter<User> {
 
public:
  typedef typename InputTraits<User>::scalar_t scalar_t;
  typedef typename InputTraits<User>::lno_t    lno_t;
  typedef typename InputTraits<User>::gno_t    gno_t;
  typedef typename InputTraits<User>::part_t   part_t;
  typedef typename InputTraits<User>::node_t   node_t;
  typedef User user_t;
 
  BasicKokkosIdentifierAdapter(
    Kokkos::View<gno_t*, typename node_t::device_type> &ids,
    Kokkos::View<scalar_t**, typename node_t::device_type> &weights);
 
  // The Adapter interface.
 
  size_t getLocalNumIDs() const override {
    return idsView_.extent(0);
  }
 
  void getIDsView(const gno_t *&ids) const override {
    auto kokkosIds = idsView_.view_host();
    ids = kokkosIds.data();
  }
 
  void getIDsKokkosView(Kokkos::View<const gno_t *,
    typename node_t::device_type> &ids) const override {
    ids = idsView_.template view<typename node_t::device_type>();
  }
 
  int getNumWeightsPerID() const override {
    return weightsView_.extent(1);
  }
 
  void getWeightsView(const scalar_t *&wgt, int &stride,
                      int idx = 0) const override
  {
    auto h_wgts_2d = weightsView_.view_host();
 
    wgt = Kokkos::subview(h_wgts_2d, Kokkos::ALL, idx).data();
    stride = 1;
  }
 
  void getWeightsKokkosView(Kokkos::View<scalar_t **,
    typename node_t::device_type> &wgts) const override {
    wgts = weightsView_.template view<typename node_t::device_type>();
  }
 
private:
  Kokkos::DualView<gno_t *> idsView_;
  Kokkos::DualView<scalar_t **> weightsView_;
};
 
// Definitions
 
template <typename User>
BasicKokkosIdentifierAdapter<User>::BasicKokkosIdentifierAdapter(
    Kokkos::View<gno_t *, typename node_t::device_type> &ids,
    Kokkos::View<scalar_t **, typename node_t::device_type> &weights)
{
  idsView_ = Kokkos::DualView<gno_t *>("idsView_", ids.extent(0));
  Kokkos::deep_copy(idsView_.h_view, ids);
 
  weightsView_ = Kokkos::DualView<scalar_t **>("weightsView_", weights.extent(0), weights.extent(1));
  Kokkos::deep_copy(weightsView_.h_view, weights);
 
  weightsView_.modify_host();
  weightsView_.sync_host();
  weightsView_.template sync<typename node_t::device_type>();
 
  idsView_.modify_host();
  idsView_.sync_host();
  idsView_.template sync<typename node_t::device_type>();
}
 
} //namespace Zoltan2
 
#endif