Force event loop to re-enter processing to handle queued messages

include/sdbus-c++/IConnection.h

@@ -64,6 +64,10 @@ namespace sdbus {
          */
         struct PollData
         {
+            /*!
+             * The read fd to be monitored by the event loop.
+             */
+            int event_fd;
             /*!
              * The read fd to be monitored by the event loop.
              */