
...
    static UPnPDeviceDirectory *getTheDir(time_t search_window = 3);

    /** Clean up before exit. Do call this.*/
    static void terminate();

    typedef std::function<bool (const UPnPDeviceDesc&,
                               const UPnPServiceDesc&)> Visitor;

    /** Traverse the directory and call Visitor for each device/service pair */
    bool traverse(Visitor);


	a/libupnpp/control/discovery.hxx		b/libupnpp/control/discovery.hxx
	...		...
64	static UPnPDeviceDirectory *getTheDir(time_t search_window = 3);	64	static UPnPDeviceDirectory *getTheDir(time_t search_window = 3);
65		65
66	/** Clean up before exit. Do call this.*/	66	/** Clean up before exit. Do call this.*/
67	static void terminate();	67	static void terminate();
68		68
69	typedef STD_FUNCTION<bool (const UPnPDeviceDesc&,	69	typedef std::function<bool (const UPnPDeviceDesc&,
70	const UPnPServiceDesc&)> Visitor;	70	const UPnPServiceDesc&)> Visitor;
71		71
72	/** Traverse the directory and call Visitor for each device/service pair */	72	/** Traverse the directory and call Visitor for each device/service pair */
73	bool traverse(Visitor);	73	bool traverse(Visitor);
74		74