inform all listeners about stop in metrics hub

lib/include/srslte/common/metrics_hub.h

@@ -25,6 +25,7 @@ class metrics_listener
 {
 public: 
   virtual void set_metrics(metrics_t &m) = 0;
+  virtual void stop() = 0;
 };
 
 template<typename metrics_t>
@@ -43,6 +44,10 @@ public:
     return true;
   }
   void stop() {
+    // stop all listeners
+    for (uint32_t i=0;i<listeners.size();i++) {
+      listeners[i]->stop();
+    }
     thread_cancel();
     wait_thread_finish();
   }

srsue/hdr/metrics_csv.h

@@ -52,6 +52,7 @@ public:
   void set_periodicity(float metrics_report_period_sec);
   void set_metrics(ue_metrics_t &m);
   void set_ue_handle(ue_metrics_interface *ue_);
+  void stop();
 
 private:
   std::string float_to_string(float f, int digits, bool add_semicolon = true);

srsue/hdr/metrics_stdout.h

@@ -50,6 +50,7 @@ public:
   void toggle_print(bool b);
   void set_metrics(ue_metrics_t &m);
   void set_ue_handle(ue_metrics_interface *ue_);
+  void stop() {};
 
 private:
   std::string float_to_string(float f, int digits);

srsue/src/metrics_csv.cc

@@ -51,11 +51,7 @@ metrics_csv::metrics_csv(std::string filename)
 
 metrics_csv::~metrics_csv()
 {
-  if (file.is_open()) {
+  stop();
-    file << "#eof\n";
-    file.flush();
-    file.close();
-  }
 }
 
 void metrics_csv::set_ue_handle(ue_metrics_interface *ue_)
@@ -63,6 +59,15 @@ void metrics_csv::set_ue_handle(ue_metrics_interface *ue_)
   ue = ue_;
 }
 
+void metrics_csv::stop()
+{
+  if (file.is_open()) {
+    file << "#eof\n";
+    file.flush();
+    file.close();
+  }
+}
+
 void metrics_csv::set_periodicity(float metrics_report_period_sec) {
   this->metrics_report_period = metrics_report_period_sec;
 }