AIO_DONE
tcmd_rdwr_done(atio, ctio, AIO_DONE);
case AIO_DONE:
tcmd_rdwr_done(atio, ctio, AIO_DONE);
c_descr->event = AIO_DONE;
if ((c_descr->event == AIO_DONE &&
a_descr, c_descr->event == AIO_DONE?