xcasync_flowcontrol_sw_input
(void) xcasync_flowcontrol_sw_input(xcp, FLOW_STOP,
(void) xcasync_flowcontrol_sw_input(xcp, FLOW_START,
xcasync_flowcontrol_sw_input(struct xencons *, async_flowc_action, int);
(void) xcasync_flowcontrol_sw_input(xcp, FLOW_STOP,
(void) xcasync_flowcontrol_sw_input(xcp, FLOW_START,
(void) xcasync_flowcontrol_sw_input(xcp, FLOW_CHECK, IN_FLOW_NULL);