g_io_flush
(void)g_io_flush(cp);
(void)g_io_flush(cp);
int g_io_flush(struct g_consumer *cp);
error = g_io_flush(cp);
if (g_io_flush(sc->sc_jconsumer) == 0) {
if (g_io_flush(sc->sc_dconsumer) == 0) {
error = g_io_flush(sc->sc_jconsumer);
error = g_io_flush(sc->sc_dconsumer);