
...
    // Using char * to avoid any issue with strings and concurrency
    virtual void changed(const char *nm, int val)  = 0;
    virtual void changed(const char *nm, const char *val) = 0;
    // Used for track metadata (parsed as content directory entry). Not always
    // needed.
    virtual void changed(const char * /*nm*/, UPnPDirObject /*meta*/) {};
    // Used by ohplaylist. Not always needed
    virtual void changed(const char * /*nm*/, std::vector<int> /*ids*/) {};
};

typedef 
STD_FUNCTION<void (const STD_UNORDERED_MAP<std::string, std::string>&)> 
evtCBFunc;

	a/libupnpp/control/service.hxx		b/libupnpp/control/service.hxx
	...		...
48	// Using char * to avoid any issue with strings and concurrency	48	// Using char * to avoid any issue with strings and concurrency
49	virtual void changed(const char *nm, int val) = 0;	49	virtual void changed(const char *nm, int val) = 0;
50	virtual void changed(const char nm, const char val) = 0;	50	virtual void changed(const char nm, const char val) = 0;
51	// Used for track metadata (parsed as content directory entry). Not always	51	// Used for track metadata (parsed as content directory entry). Not always
52	// needed.	52	// needed.
53	virtual void changed(const char /nm/, UPnPDirObject /meta*/) {};	53	virtual void changed(const char * /nm/, UPnPDirObject /meta/) {};
54	// Used by ohplaylist. Not always needed	54	// Used by ohplaylist. Not always needed
55	virtual void changed(const char /nm/, std::vector<int> /ids*/) {};	55	virtual void changed(const char * /nm/, std::vector<int> /ids/) {};
56	};	56	};
57		57
58	typedef	58	typedef
59	STD_FUNCTION<void (const STD_UNORDERED_MAP<std::string, std::string>&)>	59	STD_FUNCTION<void (const STD_UNORDERED_MAP<std::string, std::string>&)>
60	evtCBFunc;	60	evtCBFunc;