[PATCH wayland] client: add a public function to make a roundtrip on a custom queue

[Giulio Camuffo]

wl_display_roundtrip() works on the default queue. Add a parallel
wl_display_roundtrip_queue().
---
 src/wayland-client.c | 21 +++++++++++++++++++--
 src/wayland-client.h |  2 ++
 2 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/src/wayland-client.c b/src/wayland-client.c
index e8aab7e..35fc2b1 100644
--- a/src/wayland-client.c
+++ b/src/wayland-client.c
@@ -837,12 +837,12 @@ static const struct wl_callback_listener sync_listener = {
  * \return The number of dispatched events on success or -1 on failure
  *
  * Blocks until the server process all currently issued requests and
- * sends out pending events on all event queues.
+ * sends out pending events on the event queue.
  *
  * \memberof wl_display
  */
 WL_EXPORT int
-wl_display_roundtrip(struct wl_display *display)
+wl_display_roundtrip_queue(struct wl_display *display, struct wl_event_queue *queue)
 {
 	struct wl_callback *callback;
 	int done, ret = 0;
@@ -851,6 +851,7 @@ wl_display_roundtrip(struct wl_display *display)
 	callback = wl_display_sync(display);
 	if (callback == NULL)
 		return -1;
+	wl_proxy_set_queue(callback, queue);
 	wl_callback_add_listener(callback, &sync_listener, &done);
 	while (!done && ret >= 0)
 		ret = wl_display_dispatch(display);
@@ -861,6 +862,22 @@ wl_display_roundtrip(struct wl_display *display)
 	return ret;
 }
 
+/** Block until all pending request are processed by the server
+ *
+ * \param display The display context object
+ * \return The number of dispatched events on success or -1 on failure
+ *
+ * Blocks until the server process all currently issued requests and
+ * sends out pending events on the default event queue.
+ *
+ * \memberof wl_display
+ */
+WL_EXPORT int
+wl_display_roundtrip(struct wl_display *display)
+{
+	wl_display_roundtrip_queue(display, display->default_queue);
+}
+
 static int
 create_proxies(struct wl_proxy *sender, struct wl_closure *closure)
 {
diff --git a/src/wayland-client.h b/src/wayland-client.h
index 2a32785..4377207 100644
--- a/src/wayland-client.h
+++ b/src/wayland-client.h
@@ -163,6 +163,8 @@ int wl_display_dispatch_pending(struct wl_display *display);
 int wl_display_get_error(struct wl_display *display);
 
 int wl_display_flush(struct wl_display *display);
+int wl_display_roundtrip_queue(struct wl_display *display,
+                               struct wl_event_queue *queue);
 int wl_display_roundtrip(struct wl_display *display);
 struct wl_event_queue *wl_display_create_queue(struct wl_display *display);
 
-- 
2.0.1