parallel_sort.h

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// The libMesh Finite Element Library.
// Copyright (C) 2002-2019 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner
 
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
 
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
 
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
 
#ifndef LIBMESH_PARALLEL_SORT_H
#define LIBMESH_PARALLEL_SORT_H
 
// Local Includes
#include "libmesh/libmesh_common.h"
#include "libmesh/parallel_object.h"
 
// C++ Includes
#include <vector>
 
namespace libMesh
{
 
namespace Parallel
{
 
// Forward declarations
class Communicator;
 
template <typename KeyType, typename IdxType=unsigned int>
class Sort : public ParallelObject
{
public:
  Sort (const Parallel::Communicator & comm,
        std::vector<KeyType> & d);
 
 
  void sort();
 
  const std::vector<KeyType> & bin();
 
private:
 
  const processor_id_type _n_procs;
 
  const processor_id_type _proc_id;
 
  bool _bin_is_sorted;
 
  std::vector<KeyType> & _data;
 
  std::vector<IdxType> _local_bin_sizes;
 
  std::vector<KeyType> _my_bin;
 
  void binsort ();
 
  void communicate_bins();
 
  void sort_local_bin();
 
};
}
 
} // namespace libMesh
 
#endif // LIBMESH_PARALLEL_SORT_H