fix locking in count-peers thread (2)

src/daemon/daemon.cpp

@@ -320,7 +320,7 @@ int main(int argc, char* argv[])
   ccore.set_cryptonote_protocol(NULL);
   cprotocol.set_p2p_endpoint(NULL);
 
-  epee::net_utils::data_logger::get_instance().kill_instance();
+  epee::net_utils::data_logger::kill_instance();
   LOG_PRINT("Node stopped.", LOG_LEVEL_0);
   return 0;
 

src/p2p/data_logger.cpp

@@ -20,6 +20,12 @@ namespace net_utils
 				m_state = data_logger_state::state_ready_to_use;
 			}	
 		);
+		
+		if (m_state != data_logger_state::state_ready_to_use) {
+			_erro ("trying to use not working data_logger");
+			throw std::runtime_error("data_logger ctor state");
+		}
+		
 		return * m_obj;
 	}
 	
@@ -82,7 +88,7 @@ namespace net_utils
 	}
 
 	void data_logger::kill_instance() { 
-		m_state = m_state = data_logger_state::state_dying;
+		m_state = data_logger_state::state_dying;
 		m_obj.reset();
 	}
 	

src/p2p/net_node.h

@@ -89,6 +89,7 @@ namespace nodetool
     {
 		m_current_number_of_out_peers = 0;
 		m_save_graph = false;
+		is_closing = false;
 	}
 
     static void init_options(boost::program_options::options_description& desc);
@@ -209,6 +210,13 @@ namespace nodetool
   	bool set_rate_down_limit(const boost::program_options::variables_map& vm, int64_t limit);
   	bool set_rate_limit(const boost::program_options::variables_map& vm, uint64_t limit);
 
+    void kill() { ///< will be called e.g. from deinit()
+			_info("Killing the net_node");
+			is_closing = true;
+			mPeersLoggerThread->join(); // make sure the thread finishes
+			_info("Joined extra background net_node threads");
+		}
+
     //debug functions
     std::string print_connections_container();
 
@@ -247,7 +255,8 @@ namespace nodetool
     bool m_hide_my_port;
     bool m_no_igd;
     std::atomic<bool> m_save_graph;
-
+    std::atomic<bool> is_closing;
+	std::unique_ptr<std::thread> mPeersLoggerThread;
     //critical_section m_connections_lock;
     //connections_indexed_container m_connections;
 

src/p2p/net_node.inl

@@ -291,17 +291,17 @@ namespace nodetool
       std::vector<std::vector<std::string>> dns_results;
       dns_results.resize(m_seed_nodes_list.size());
       
-      std::shared_ptr<std::thread> peersLoggerThread (new std::thread([&]()
-      {
-		unsigned int number_of_peers;
-		while (1)
+      // creating thread to log number of connections
+      mPeersLoggerThread.reset(new std::thread([&]()
       {
+			_note("Thread monitor number of peers - start");
+		while (!is_closing)
+		{ // main loop of thread
 			//number_of_peers = m_net_server.get_config_object().get_connections_count();
-			number_of_peers = 0;
+			unsigned int number_of_peers = 0;
 			m_net_server.get_config_object().foreach_connection([&](const p2p_connection_context& cntxt)
 			{
-				if(!cntxt.m_is_income)
-					++number_of_peers;
+				if (!cntxt.m_is_income) ++number_of_peers;
 				return true;
 			}); // lambda
 				
@@ -309,10 +309,10 @@ namespace nodetool
 			epee::net_utils::data_logger::get_instance().add_data("peers", number_of_peers);
 				
 			std::this_thread::sleep_for(std::chrono::seconds(1));
-		}
+		} // main loop of thread
+			_note("Thread monitor number of peers - done");
       })); // lambda
       
-      peersLoggerThread->detach();
 
       std::list<boost::thread*> dns_threads;
       uint64_t result_index = 0;
@@ -509,6 +509,7 @@ namespace nodetool
   template<class t_payload_net_handler>
   bool node_server<t_payload_net_handler>::deinit()
   {
+	kill();
     m_peerlist.deinit();
     m_net_server.deinit_server();