Libevent custom event (asynchronous)

Customize asynchronous events

• Create an event

struct event *ev = event_new(base, -1, EV_PERSIST, event_cb, NULL);
event_add(ev, NULL);

• Callback function

static void event_cb(int sock, short which, void *arg) 
{
    
	printf("%s\r\n",__func__);
}

• Trigger

event_active(ev , EV_SIGNAL, 0);

explain

• After triggering , Will not sync immediately The callback , Will be in libevent Call callback after loop （ asynchronous ）.