XPCOM--LINUX下的组件开发技术

 public:

  NS_DEFINE_STATIC_IID_ACCESSOR(NS_IMYCOM_IID)

  /* void Hello (in string in_str, [retval] out string out_str); */

  NS_IMETHOD Hello(const char *in_str, char **out_str) = 0;

};

/* Use this macro when declaring classes that implement this interface. */

#define NS_DECL_NSIMYCOM /

  NS_IMETHOD Hello(const char *in_str, char **out_str);

/* Use this macro to declare functions that forward the behavior of this interface to another object. */

#define NS_FORWARD_NSIMYCOM(_to) /

  NS_IMETHOD Hello(const char *in_str, char **out_str) { return _to Hello(in_str, out_str); }

/* Use this macro to declare functions that forward the behavior of this interface to another object in a safe

way. */

#define NS_FORWARD_SAFE_NSIMYCOM(_to) /

  NS_IMETHOD Hello(const char *in_str, char **out_str) { return !_to ? NS_ERROR_NULL_POINTER : _to->Hello

(in_str, out_str); }