Add force_roundtrip helper

2 files changed, 29 insertions, 0 deletions

diff --git a/wayland/wayland-client.c b/wayland/wayland-client.c
index ce71833..0f970b1 100644
--- a/wayland/wayland-client.c
+++ b/wayland/wayland-client.c
@@ -468,6 +468,34 @@ wl_surface_frame_callback(struct wl_surface *surface,
 	return wl_callback_setup(wl_surface_frame(surface), func, data);
 }
 
+
+static void
+sync_callback(void *data, struct wl_callback *callback, uint32_t time)
+{
+   int *done = data;
+
+   *done = 1;
+   wl_callback_destroy(callback);
+}
+
+static const struct wl_callback_listener sync_listener = {
+	sync_callback
+};
+
+WL_EXPORT void
+wl_display_roundtrip(struct wl_display *display)
+{
+	struct wl_callback *callback;
+	int done;
+
+	done = 0;
+	callback = wl_display_sync(display);
+	wl_callback_add_listener(callback, &sync_listener, &done);
+	wl_display_iterate(display, WL_DISPLAY_WRITABLE);
+	while (!done)
+		wl_display_iterate(display, WL_DISPLAY_READABLE);
+}
+
 static void
 handle_event(struct wl_display *display,
 	     uint32_t id, uint32_t opcode, uint32_t size)
diff --git a/wayland/wayland-client.h b/wayland/wayland-client.h
index 21f071d..a7041c3 100644
--- a/wayland/wayland-client.h
+++ b/wayland/wayland-client.h
@@ -65,6 +65,7 @@ void wl_display_iterate(struct wl_display *display, uint32_t mask);
 void wl_display_flush(struct wl_display *display);
 int wl_display_sync_callback(struct wl_display *display,
 			     wl_callback_func_t func, void *data);
+void wl_display_roundtrip(struct wl_display *display);
 int wl_callback_setup(struct wl_callback *callback, 
 		      wl_callback_func_t func, void *data);