Add Signal5.

git-svn-id: svn://localhost/ardour2/branches/3.0@10134 d708f5d6-7413-0410-9779-e7cbd77b26cf

libs/pbd/pbd/signals.h

@@ -323,6 +323,58 @@ private:
     SignalType _signal;
 };
 
+template<typename R, typename A1, typename A2, typename A3, typename A4, typename A5>
+class Signal5 {
+public:
+    Signal5 () {}
+    typedef boost::signals2::signal<R(A1,A2,A3,A4,A5)> SignalType;
+
+    void connect_same_thread (ScopedConnectionList& clist, 
+		  const typename SignalType::slot_function_type& slot) {
+	    clist.add_connection (_signal.connect (slot));
+    }
+
+    void connect_same_thread (ScopedConnection& c, 
+			      const typename SignalType::slot_function_type& slot) {
+	    c = _signal.connect (slot);
+    }
+
+    static void compositor (typename boost::function<void(A1,A2,A3,A4,A5)> f, PBD::EventLoop* event_loop, 
+                            EventLoop::InvalidationRecord* ir, 
+                            A1 arg1, A2 arg2, A3 arg3, A4 arg4, A5 arg5) {
+	    event_loop->call_slot (ir, boost::bind (f, arg1, arg2, arg3, arg4, arg5));
+    }
+
+    void connect (ScopedConnectionList& clist, 
+                  PBD::EventLoop::InvalidationRecord* ir, 
+		  const typename SignalType::slot_function_type& slot,
+		  PBD::EventLoop* event_loop) {
+	    if (ir) {
+		    ir->event_loop = event_loop;
+	    }
+	    clist.add_connection (_signal.connect (boost::bind (&compositor, slot, event_loop, ir, _1, _2, _3, _4, _5)));
+    }
+    
+    void connect (ScopedConnection& c, 
+                  PBD::EventLoop::InvalidationRecord* ir, 
+		  const typename SignalType::slot_function_type& slot,
+		  PBD::EventLoop* event_loop) {
+	    if (ir) {
+		    ir->event_loop = event_loop;
+	    }
+	    c = _signal.connect (_signal.connect (boost::bind (&compositor, slot, event_loop, ir, _1, _2, _3, _4, _5)));
+    }
+    
+    typename SignalType::result_type operator()(A1 arg1, A2 arg2, A3 arg3, A4 arg4, A5 arg5) {
+	    return _signal (arg1, arg2, arg3, arg4, arg5);
+    }
+    
+    bool empty() const { return _signal.empty(); }
+
+private:
+    SignalType _signal;
+};
+	
 } /* namespace */
 
 #endif /* __pbd_signals_h__ */