ui: introduce enum to track VNC client framebuffer update request state

Currently the VNC servers tracks whether a client has requested an incremental
or forced update with two boolean flags. There are only really 3 distinct
states to track, so create an enum to more accurately reflect permitted states.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20171218191228.31018-7-berrange@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/ui/vnc.h b/ui/vnc.h
index 694cf32..b9d310e 100644
--- a/ui/vnc.h
+++ b/ui/vnc.h
@@ -252,6 +252,12 @@ struct VncJob
     QTAILQ_ENTRY(VncJob) next;
 };
 
+typedef enum {
+    VNC_STATE_UPDATE_NONE,
+    VNC_STATE_UPDATE_INCREMENTAL,
+    VNC_STATE_UPDATE_FORCE,
+} VncStateUpdate;
+
 struct VncState
 {
     QIOChannelSocket *sioc; /* The underlying socket */
@@ -264,8 +270,7 @@ struct VncState
                            * vnc-jobs-async.c */
 
     VncDisplay *vd;
-    int need_update;
-    int force_update;
+    VncStateUpdate update; /* Most recent pending request from client */
     int has_dirty;
     uint32_t features;
     int absolute;