console: add graphic_hw_update_done()

Add a function to be called when a graphic update is done.

Declare the QXL renderer as async: render_update_cookie_num counts the
number of outstanding updates, and graphic_hw_update_done() is called
when it reaches none.

(note: this is preliminary work for asynchronous screendump support)

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/ui/console.c b/ui/console.c
index 82d1ddac9c..3c941528d2 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -259,13 +259,22 @@ static void gui_setup_refresh(DisplayState *ds)
     ds->have_text = have_text;
 }
 
+void graphic_hw_update_done(QemuConsole *con)
+{
+}
+
 void graphic_hw_update(QemuConsole *con)
 {
+    bool async = false;
     if (!con) {
         con = active_console;
     }
     if (con && con->hw_ops->gfx_update) {
         con->hw_ops->gfx_update(con->hw);
+        async = con->hw_ops->gfx_update_async;
+    }
+    if (!async) {
+        graphic_hw_update_done(con);
     }
 }