Fix possible race condition leading to a dead lock

It is a bit dangerous to call wl_display_dispatch() in the event thread,
since it may race with the dispatch called e.g. in QWaylandDisplay's
blockingReadEvents() and lead to a dead lock. Instead, use wl_display_prepare_read()
and wl_display_read_events() in the event thread, which doesn't block, and only
dispatch in QWaylandDisplay.
As a result we don't need the additional wayland queue anymore, so remove it.

Change-Id: I9fbbe5d2f38d06773beb7847df1a0212cca92c37
Reviewed-by: Robin Burchell <robin.burchell@viroteck.net>

1 files changed, 0 insertions, 1 deletions

diff --git a/examples/wayland/server-buffer/client/main.cpp b/examples/wayland/server-buffer/client/main.cpp
index 3f7a94d03..1a2c447a7 100644
--- a/examples/wayland/server-buffer/client/main.cpp
+++ b/examples/wayland/server-buffer/client/main.cpp
@@ -95,7 +95,6 @@ public:
 
         QtWaylandClient::QWaylandDisplay *wayland_display = wayland_integration->display();
         struct ::wl_registry *registry = wl_display_get_registry(wayland_display->wl_display());
-        wl_proxy_set_queue(reinterpret_cast<struct wl_proxy *>(registry), wayland_display->wl_event_queue());
         QtWayland::wl_registry::init(registry);
     }