Function mpi::ffi::PMPI_Neighbor_alltoallv

pub unsafe extern fn PMPI_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