[Spice-devel] [PATCH spice-gtk] spice-widget: Make sure we can use X11 from different thread

[Frediano Ziglio]

In order to support GStreamer overlay this is necessary as some
plugins can use X11 from a different thread.

Signed-off-by: Frediano Ziglio <fziglio at redhat.com>
---
 src/spice-widget.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

CI result:
https://gitlab.freedesktop.org/fziglio/spice-gtk/pipelines/9559

diff --git a/src/spice-widget.c b/src/spice-widget.c
index 312c640a..cca0867e 100644
--- a/src/spice-widget.c
+++ b/src/spice-widget.c
@@ -2547,6 +2547,19 @@ static void queue_draw_area(SpiceDisplay *display, gint x, gint y,
                                x, y, width, height);
 }
 
+#ifdef GDK_WINDOWING_X11
+/* See https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-base-libs/html/GstGLDisplay.html
+ * (look for XInitThreads). We call it into a constructor to make sure
+ * we call before any X11 function.
+ * In case of GStreamer some plugins will use X11 from different
+ * threads.
+ */
+SPICE_CONSTRUCTOR_FUNC(x11_threads_init)
+{
+    XInitThreads();
+}
+#endif
+
 static void* prepare_streaming_mode(SpiceChannel *channel, bool streaming_mode, gpointer data)
 {
 #ifdef GDK_WINDOWING_X11
-- 
2.17.2