ub_ctx_create_event
struct ub_ctx* ub_ctx_create_event(struct event_base* base);
if ((res->ctx = ub_ctx_create_event(ev_base)) == NULL) {
if ((ctx = ub_ctx_create_event(ev_base)) == NULL)
struct ub_ctx* ub_ctx_create_event(struct event_base* base);