added priority to connection queue. trackers and upnp connections have higher priority than peers

include/libtorrent/connection_queue.hpp

@@ -52,7 +52,7 @@ public:
 
 	void enqueue(boost::function<void(int)> const& on_connect
 		, boost::function<void()> const& on_timeout
-		, time_duration timeout);
+		, time_duration timeout, int priority = 0);
 	void done(int ticket);
 	void limit(int limit);
 	int limit() const;
@@ -71,7 +71,7 @@ private:
 
 	struct entry
 	{
-		entry(): connecting(false), ticket(0), expires(max_time()) {}
+		entry(): connecting(false), ticket(0), expires(max_time()), priority(0) {}
 		// called when the connection is initiated
 		boost::function<void(int)> on_connect;
 		// called if done hasn't been called within the timeout
@@ -80,6 +80,7 @@ private:
 		int ticket;
 		ptime expires;
 		time_duration timeout;
+		int priority;
 	};
 
 	std::list<entry> m_queue;

include/libtorrent/http_connection.hpp

@@ -90,6 +90,7 @@ struct http_connection : boost::enable_shared_from_this<http_connection>, boost:
 		, m_connection_ticket(-1)
 		, m_cc(cc)
 		, m_ssl(false)
+		, m_priority(0)
 	{
 		TORRENT_ASSERT(!m_handler.empty());
 	}
@@ -102,12 +103,13 @@ struct http_connection : boost::enable_shared_from_this<http_connection>, boost:
 	std::string sendbuffer;
 
 	void get(std::string const& url, time_duration timeout = seconds(30)
-		, proxy_settings const* ps = 0, int handle_redirects = 5
+		, int prio = 0, proxy_settings const* ps = 0, int handle_redirects = 5
 		, std::string const& user_agent = "", address const& bind_addr = address_v4::any());
 
 	void start(std::string const& hostname, std::string const& port
-		, time_duration timeout, proxy_settings const* ps = 0, bool ssl = false
-		, int handle_redirect = 5, address const& bind_addr = address_v4::any());
+		, time_duration timeout, int prio = 0, proxy_settings const* ps = 0
+		, bool ssl = false, int handle_redirect = 5
+		, address const& bind_addr = address_v4::any());
 
 	void close();
 
@@ -189,6 +191,10 @@ private:
 	// the address to bind to. address_v4::any()
 	// means do not bind
 	address m_bind_addr;
+
+	// the priority we have in the connection queue.
+	// 0 is normal, 1 is high
+	int m_priority;
 };
 
 }

src/connection_queue.cpp

@@ -52,18 +52,34 @@ namespace libtorrent
 
 	void connection_queue::enqueue(boost::function<void(int)> const& on_connect
 		, boost::function<void()> const& on_timeout
-		, time_duration timeout)
+		, time_duration timeout, int priority)
 	{
 		mutex_t::scoped_lock l(m_mutex);
 
 		INVARIANT_CHECK;
 
-		m_queue.push_back(entry());
-		entry& e = m_queue.back();
-		e.on_connect = on_connect;
-		e.on_timeout = on_timeout;
-		e.ticket = m_next_ticket;
-		e.timeout = timeout;
+		TORRENT_ASSERT(priority >= 0);
+		TORRENT_ASSERT(priority < 2);
+
+		entry* e = 0;
+
+		switch (priority)
+		{
+			case 0:
+				m_queue.push_back(entry());
+				e = &m_queue.back();
+				break;
+			case 1:
+				m_queue.push_front(entry());
+				e = &m_queue.front();
+				break;
+		}
+
+		e->priority = priority;
+		e->on_connect = on_connect;
+		e->on_timeout = on_timeout;
+		e->ticket = m_next_ticket;
+		e->timeout = timeout;
 		++m_next_ticket;
 		try_connect();
 	}

src/http_connection.cpp

@@ -48,7 +48,7 @@ namespace libtorrent {
 enum { max_bottled_buffer = 1024 * 1024 };
 
 
-void http_connection::get(std::string const& url, time_duration timeout
+void http_connection::get(std::string const& url, time_duration timeout, int prio
 	, proxy_settings const* ps, int handle_redirects, std::string const& user_agent
 	, address const& bind_addr)
 {
@@ -102,12 +102,12 @@ void http_connection::get(std::string const& url, time_duration timeout
 		"\r\n";
 
 	sendbuffer = headers.str();
-	start(hostname, boost::lexical_cast<std::string>(port), timeout, ps
-		, ssl, handle_redirects, bind_addr);
+	start(hostname, boost::lexical_cast<std::string>(port), timeout, prio
+		, ps, ssl, handle_redirects, bind_addr);
 }
 
 void http_connection::start(std::string const& hostname, std::string const& port
-	, time_duration timeout, proxy_settings const* ps, bool ssl, int handle_redirects
+	, time_duration timeout, int prio, proxy_settings const* ps, bool ssl, int handle_redirects
 	, address const& bind_addr)
 {
 	m_redirects = handle_redirects;
@@ -122,6 +122,7 @@ void http_connection::start(std::string const& hostname, std::string const& port
 	m_parser.reset();
 	m_recvbuffer.clear();
 	m_read_pos = 0;
+	m_priority = prio;
 
 	if (ec)
 	{
@@ -254,7 +255,7 @@ void http_connection::on_resolve(asio::error_code const& e
 	
 	m_cc.enqueue(bind(&http_connection::connect, shared_from_this(), _1, target_address)
 		, bind(&http_connection::on_connect_timeout, shared_from_this())
-		, m_timeout);
+		, m_timeout, m_priority);
 }
 
 void http_connection::connect(int ticket, tcp::endpoint target_address)
@@ -280,7 +281,7 @@ void http_connection::on_connect(asio::error_code const& e
 		m_sock.close();
 		m_cc.enqueue(bind(&http_connection::connect, shared_from_this(), _1, *i)
 			, bind(&http_connection::on_connect_timeout, shared_from_this())
-			, m_timeout);
+			, m_timeout, m_priority);
 	} 
 */	else
 	{ 

src/http_tracker_connection.cpp

@@ -167,7 +167,7 @@ namespace libtorrent
 			, boost::bind(&http_tracker_connection::on_response, self(), _1, _2, _3, _4)));
 
 		m_tracker_connection->get(url, seconds(stn.tracker_completion_timeout)
-			, &ps, 5, stn.user_agent, bind_infc);
+			, 1, &ps, 5, stn.user_agent, bind_infc);
 
 #if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
 

src/upnp.cpp

@@ -204,7 +204,7 @@ void upnp::resend_request(asio::error_code const& e)
 				d.upnp_connection.reset(new http_connection(m_io_service
 					, m_cc, bind(&upnp::on_upnp_xml, self(), _1, _2
 					, boost::ref(d))));
-				d.upnp_connection->get(d.url);
+				d.upnp_connection->get(d.url, seconds(30), 1);
 			}
 			catch (std::exception& e)
 			{