Function mpi::ffi::MPI_Neighbor_alltoallv

pub unsafe extern fn MPI_Neighbor_alltoallv(sendbuf: *const c_void,
                                            sendcounts: *const c_int,
                                            sdispls: *const c_int,
                                            sendtype: MPI_Datatype,
                                            recvbuf: *mut c_void,
                                            recvcounts: *const c_int,
                                            rdispls: *const c_int,
                                            recvtype: MPI_Datatype,
                                            comm: MPI_Comm)
                                            -> c_int