clean up shutdown

git-svn-id: svn://localhost/ardour2/trunk@1571 d708f5d6-7413-0410-9779-e7cbd77b26cf

libs/surfaces/mackie/TODO

@@ -2,6 +2,10 @@
   where ENSURE_CORRECT_THREAD is a macro that is modelled on ENSURE_GUI_THREAD
   if the handler is not called in the "correct thread", it will use a pseudo-RT-safe-enough technique to get the correct thread to recall "handler" later on, and return.
 
+* On shutdown, sometimes: GThread-ERROR **: file gthread-posix.c: line 160 (): error 'Device or resource busy' during 'pthread_mutex_destroy ((pthread_mutex_t *) mutex)'
+aborting...
+Aborted
+
 * jog with transport rolling doesn't work properly. My use of ScrollTimeline also doesn't work.
 * finish button mapping.
 * concurrency for bank switching? And make sure "old" events aren't sent to "new" faders

libs/surfaces/mackie/mackie_control_protocol.cc

@@ -94,6 +94,7 @@ MackieControlProtocol::MackieControlProtocol (Session& session)
 	, connections_back( _connections )
 	, _surface( 0 )
 	, _ports_changed( false )
+	, _polling( true )
 	, pfd( 0 )
 	, nfds( 0 )
 {
@@ -542,7 +543,7 @@ void MackieControlProtocol::connect_session_signals()
 	Sorted sorted = get_sorted_routes();
 	for ( Sorted::iterator it = sorted.begin(); it != sorted.end(); ++it )
 	{
-		(*it)->RemoteControlIDChanged.connect( ( mem_fun (*this, &MackieControlProtocol::notify_remote_id_changed) ) );
+		connections_back = (*it)->RemoteControlIDChanged.connect( ( mem_fun (*this, &MackieControlProtocol::notify_remote_id_changed) ) );
 	}
 }
 
@@ -645,7 +646,7 @@ void MackieControlProtocol::initialize_surface()
 	// Connect events. Must be after route table otherwise there will be trouble
 	for( MackiePorts::iterator it = _ports.begin(); it != _ports.end(); ++it )
 	{
-		(*it)->control_event.connect( ( mem_fun (*this, &MackieControlProtocol::handle_control_event) ) );
+		connections_back = (*it)->control_event.connect( ( mem_fun (*this, &MackieControlProtocol::handle_control_event) ) );
 	}
 }
 
@@ -654,6 +655,16 @@ void MackieControlProtocol::close()
 	// TODO disconnect port active/inactive signals
 	// Or at least put a lock here
 	
+	// disconnect global signals from Session
+	// TODO Since *this is a sigc::trackable, this shouldn't be necessary
+	// but it is for some reason
+#if 0
+	for( vector<sigc::connection>::iterator it = _connections.begin(); it != _connections.end(); ++it )
+	{
+		it->disconnect();
+	}
+#endif
+	
 	if ( _surface != 0 )
 	{
 		// These will fail if the port has gone away.
@@ -687,19 +698,15 @@ void MackieControlProtocol::close()
 			}
 		}
 		
-		// disconnect global signals from Session
-		// TODO Since *this is a sigc::trackable, this shouldn't be necessary
-		for( vector<sigc::connection>::iterator it = _connections.begin(); it != _connections.end(); ++it )
-		{
-			it->disconnect();
-		}
-		
 		// disconnect routes from strips
 		clear_route_signals();
+		
+		delete _surface;
+		_surface = 0;
 	}
 	
 	// stop polling, and wait for it...
-	pthread_cancel_one( thread );
+	_polling = false;
 	pthread_join( thread, 0 );
 	
 	// shut down MackiePorts
@@ -709,7 +716,10 @@ void MackieControlProtocol::close()
 	}
 	_ports.clear();
 	
+	// this is done already in monitor_work. But it's here so we know.
 	delete[] pfd;
+	pfd = 0;
+	nfds = 0;
 }
 
 void* MackieControlProtocol::_monitor_work (void* arg)
@@ -1145,7 +1155,7 @@ void MackieControlProtocol::notify_route_added( ARDOUR::Session::RouteList & rl
 	typedef ARDOUR::Session::RouteList ARS;
 	for ( ARS::iterator it = rl.begin(); it != rl.end(); ++it )
 	{
-		(*it)->RemoteControlIDChanged.connect( ( mem_fun (*this, &MackieControlProtocol::notify_remote_id_changed) ) );
+		connections_back = (*it)->RemoteControlIDChanged.connect( ( mem_fun (*this, &MackieControlProtocol::notify_remote_id_changed) ) );
 	}
 }
 

libs/surfaces/mackie/mackie_control_protocol.h

@@ -296,6 +296,7 @@ class MackieControlProtocol
 	/// true until the port configuration is updated;
 	bool _ports_changed;
 
+	bool _polling;
 	struct pollfd * pfd;
 	int nfds;
 };

libs/surfaces/mackie/mackie_control_protocol_poll.cc

@@ -41,7 +41,7 @@ void * MackieControlProtocol::monitor_work()
 	pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, 0);
 
 	// read from midi ports
-	while ( true )
+	while ( _polling )
 	{
 		try
 		{
@@ -61,15 +61,12 @@ void * MackieControlProtocol::monitor_work()
 		{
 			cout << "caught exception in MackieControlProtocol::monitor_work " << e.what() << endl;
 		}
-		
-		// provide a cancellation point
-		pthread_testcancel();
 	}
 
-	// these never get called because of cancellation point above
-	cout << "MackieControlProtocol::poll_ports exiting" << endl;
-	
+	// TODO ports and pfd and nfds should be in a separate class
 	delete[] pfd;
+	pfd = 0;
+	nfds = 0;
 
 	return (void*) 0;
 }