Function mpi::ffi::PMPI_Alltoallv

pub unsafe extern fn PMPI_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