making tracker_manager::remove_request type specific

include/libtorrent/tracker_manager.hpp

@@ -286,7 +286,6 @@ namespace libtorrent
 #endif
 	};
 
-	// TODO: 2 this class probably doesn't need to have virtual functions.
 	struct TORRENT_EXTRA_EXPORT tracker_connection
 		: timeout_handler
 	{
@@ -303,7 +302,7 @@ namespace libtorrent
 		void fail(error_code const& ec, int code = -1, char const* msg = ""
 			, int interval = 0, int min_interval = 0);
 		virtual void start() = 0;
-		virtual void close();
+		virtual void close() = 0;
 		address const& bind_interface() const { return m_req.bind_ip; }
 		void sent_bytes(int bytes);
 		void received_bytes(int bytes);
@@ -359,7 +358,8 @@ namespace libtorrent
 				= std::weak_ptr<request_callback>());
 		void abort_all_requests(bool all = false);
 
-		void remove_request(tracker_connection const*);
+		void remove_request(http_tracker_connection const* c);
+		void remove_request(udp_tracker_connection const* c);
 		bool empty() const;
 		int num_requests() const;
 

src/http_tracker_connection.cpp

@@ -253,7 +253,8 @@ namespace libtorrent
 			m_tracker_connection->close();
 			m_tracker_connection.reset();
 		}
-		tracker_connection::close();
+		cancel();
+		m_man.remove_request(this);
 	}
 
 	// endpoints is an in-out parameter

src/tracker_manager.cpp

@@ -196,12 +196,6 @@ namespace libtorrent
 		m_man.received_bytes(bytes);
 	}
 
-	void tracker_connection::close()
-	{
-		cancel();
-		m_man.remove_request(this);
-	}
-
 	tracker_manager::tracker_manager(send_fun_t const& send_fun
 		, send_fun_hostname_t const& send_fun_hostname
 		, counters& stats_counters
@@ -238,7 +232,7 @@ namespace libtorrent
 		m_stats_counters.inc_stats_counter(counters::recv_tracker_bytes, bytes);
 	}
 
-	void tracker_manager::remove_request(tracker_connection const* c)
+	void tracker_manager::remove_request(http_tracker_connection const* c)
 	{
 		TORRENT_ASSERT(is_single_thread());
 		http_conns_t::iterator i = std::find_if(m_http_conns.begin(), m_http_conns.end()
@@ -248,14 +242,12 @@ namespace libtorrent
 			m_http_conns.erase(i);
 			return;
 		}
+	}
 
-		udp_conns_t::iterator j = std::find_if(m_udp_conns.begin(), m_udp_conns.end()
-			, [c] (udp_conns_t::value_type const& uc) { return uc.second.get() == c; });
-		if (j != m_udp_conns.end())
-		{
-			m_udp_conns.erase(j);
-			return;
-		}
+	void tracker_manager::remove_request(udp_tracker_connection const* c)
+	{
+		TORRENT_ASSERT(is_single_thread());
+		m_udp_conns.erase(c->transaction_id());
 	}
 
 	void tracker_manager::update_transaction_id(

src/udp_tracker_connection.cpp

@@ -329,8 +329,8 @@ namespace libtorrent
 
 	void udp_tracker_connection::close()
 	{
-		error_code ec;
-		tracker_connection::close();
+		cancel();
+		m_man.remove_request(this);
 	}
 
 	bool udp_tracker_connection::on_receive_hostname(char const* hostname