EVLOOP_ONCE
if (!base->event_count_active && (flags & EVLOOP_ONCE))
event_loop(EVLOOP_ONCE);
event_loop(EVLOOP_ONCE);
event_base_loop(base, EVLOOP_ONCE);
event_base_loop(base, EVLOOP_ONCE);
event_loop(EVLOOP_ONCE);
while ((rval = event_loop(EVLOOP_ONCE)) == 0) {
if(!(flags & EVLOOP_ONCE))
if(event_base_loop(event_base, EVLOOP_ONCE) == -1) {
if(event_base_loop(event_base, EVLOOP_ONCE) == -1) {
if(event_base_loop(xfrd->event_base, EVLOOP_ONCE) == -1) {