Function mpi::ffi::PMPI_Ialltoall

pub unsafe extern fn PMPI_Ialltoall(sendbuf: *const c_void,
                                    sendcount: c_int,
                                    sendtype: MPI_Datatype,
                                    recvbuf: *mut c_void,
                                    recvcount: c_int,
                                    recvtype: MPI_Datatype,
                                    comm: MPI_Comm,
                                    request: *mut MPI_Request)
                                    -> c_int