+
+ unsigned int swap_method;
+ unsigned int back_format;
+ xcb_present_complete_mode_t last_present_mode;
+
+ /* Currently protects the following fields:
+ * event_cnd, has_event_waiter,
+ * recv_sbc, ust, msc, recv_msc_serial,
+ * notify_ust, notify_msc
+ */
+ mtx_t mtx;
+ cnd_t event_cnd;
+ bool has_event_waiter;