Zoltan2_BasicKokkosIdentifierAdapter.hpp

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#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;
  typedef Kokkos::LayoutLeft weight_layout_t;
 
  BasicKokkosIdentifierAdapter(Kokkos::View<gno_t*> &ids,
                            Kokkos::View<scalar_t**, weight_layout_t> &weights);
 
  // The Adapter interface.
 
  size_t getLocalNumIDs() const { return idsView_.extent(0); }
 
  void getIDsKokkosView(Kokkos::View<gno_t *> &ids) const {ids = idsView_;}
 
  int getNumWeightsPerID() const { return weightsView_.extent(1); }
 
  void getWeightsKokkosView(Kokkos::View<scalar_t *> &wgt, int idx = 0) const {
    if (idx < 0 || scalar_t(idx) >= weightsView_.extent(0)) {
      std::ostringstream emsg;
      emsg << __FILE__ << ":" << __LINE__
           << "  Invalid weight index " << idx << std::endl;
      throw std::runtime_error(emsg.str());
    }
    wgt = Kokkos::subview(weightsView_, ALL, idx);
  }
 
private:
  Kokkos::View<gno_t *> idsView_;
  Kokkos::View<scalar_t **, weight_layout_t> weightsView_;
};
 
// Definitions
 
template <typename User>
  BasicKokkosIdentifierAdapter<User>::BasicKokkosIdentifierAdapter(
    Kokkos::View<gno_t*> &ids,
    Kokkos::View<scalar_t**, weight_layout_t> &weights):
      idsView_(ids), weightsView_(weights) {
}
  
} //namespace Zoltan2
  
#endif