mpi_carl_tools.h

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/*
 * mpi_carl_tools.h
 *
 *  Created on: Feb 22, 2016
 *      Author: Thiago Milanetto Schlittler
 */

#ifndef COMMON_LIBMESH_CODE_MPI_CARL_TOOLS_H_
#define COMMON_LIBMESH_CODE_MPI_CARL_TOOLS_H_

#include "carl_headers.h"

namespace carl
{

void broadcast_index_unordered_map(
        std::unordered_map<int,int>& index_map,
        const libMesh::Parallel::Communicator& CommComm,
        int origin_rank = 0);

template <typename T>
inline void MPI_reduce_vector(std::vector<T> & r, int root, const libMesh::Parallel::Communicator& Comm)
{
    if (Comm.size() > 1 && !r.empty())
        {
            libmesh_assert(Comm.verify(r.size()));

            std::vector<T> temp(r);
            MPI_Reduce(&temp[0], &r[0], libMesh::cast_int<int>(r.size()),
                        libMesh::Parallel::StandardType<T>(&temp[0]), MPI_SUM, root,
                        Comm.get());
        }
    }
}
#endif /* COMMON_LIBMESH_CODE_MPI_CARL_TOOLS_H_ */