silence noisy unhandled in_sync_ev logs

lib/include/srslte/common/fsm.h

@@ -64,6 +64,17 @@ struct is_composite_fsm<T, typename std::enable_if<is_fsm<T>::value>::type> {
 
 namespace fsm_details {
 
+/// check whether to log unhandled event
+template <typename Event>
+auto should_log_unhandled_event(const Event* ev) -> decltype(Event::log_verbose)
+{
+  return Event::log_verbose;
+}
+inline bool should_log_unhandled_event(...)
+{
+  return true;
+}
+
 //! Meta-function to filter transition_list<Rows...> by <Event, SrcState> types
 template <class Event, class SrcState, class...>
 struct filter_transition_type;
@@ -246,10 +257,12 @@ struct apply_first_guard_pass<FSM, type_list<> > {
   template <typename SrcState, typename Event>
   static bool trigger(FSM* f, SrcState& s, const Event& ev)
   {
+    if (should_log_unhandled_event(&ev)) {
       otherfsmDebug(static_cast<typename FSM::derived_t*>(f),
                     "unhandled event caught in state \"%s\": \"%s\"\n",
                     get_type_name<SrcState>().c_str(),
                     get_type_name<Event>().c_str());
+    }
     return false;
   }
 };

srsue/hdr/stack/rrc/phy_controller.h

@@ -49,7 +49,9 @@ public:
     phy_cell_t phy_cell;
   };
   struct cell_search_cmd {};
-  struct in_sync_ev {};
+  struct in_sync_ev {
+    static const bool log_verbose = false;
+  };
   struct out_sync_ev {};
 
   explicit phy_controller(phy_interface_rrc_lte*                        phy_,