+/* Sets the adaptive sync window property state. */
+static void
+set_adaptive_sync_property(xcb_connection_t *conn, xcb_drawable_t drawable,
+ uint32_t state)
+{
+ static char const name[] = "_VARIABLE_REFRESH";
+ xcb_intern_atom_cookie_t cookie;
+ xcb_intern_atom_reply_t* reply;
+ xcb_void_cookie_t check;
+
+ cookie = xcb_intern_atom(conn, 0, sizeof(name), name);
+ reply = xcb_intern_atom_reply(conn, cookie, NULL);
+ if (reply == NULL)
+ return;
+
+ if (state)
+ check = xcb_change_property_checked(conn, XCB_PROP_MODE_REPLACE,
+ drawable, reply->atom,
+ XCB_ATOM_CARDINAL, 32, 1, &state);
+ else
+ check = xcb_delete_property_checked(conn, drawable, reply->atom);
+
+ xcb_discard_reply(conn, check.sequence);
+ free(reply);
+}
+