/**
 * @file   domain_decomposition_mpi.hpp
 * @author Julian Iseringhausen <isering@ins.uni-bonn.de>
 * @date   Mon Jun 27 12:53:50 2011
 *
 * @brief  Computes a domain decomposition which separates
 *         the finest grid equally for all processes.
 *
 */

#ifndef DOMAIN_DECOMPOSITION_MPI_HPP_
#define DOMAIN_DECOMPOSITION_MPI_HPP_

#include "comm/domain_decomposition.hpp"

namespace VMG
{

class Index;

class DomainDecompositionMPI : public DomainDecomposition
{
public:
  void Compute(Comm* comm, const Interface* interface, std::vector<GlobalIndices>& global);

private:
  bool IsActive(Comm* comm, const Index& size_global, Index& procs);
  void FineToCoarse(Comm* comm, int& begin, int& end, int levels);
};

}

#endif /* DOMAIN_DECOMPOSITION_MPI_HPP_ */