how to pass a non static-member function as a callback?

Question

 
io_iterator_t enumerator;
kern_return_t   result;
result = IOServiceAddMatchingNotification(
             mNotifyPort,
             kIOMatchedNotification,
             


        

Answer 1

Not directly.

The non-static function pointer (known as a member function pointer) has a hidden 'this' parameter so the types don't match. The static function has no 'this' pointer.

To get around this, you need to be able to pass in a user data item which is the 'this' pointer of the object you want to use as a callback. Then, specify a static member that is passed the user data, converts it to a pointer to the class object and calls the non-static member on it.

Looking at the code you've posted, it's hard to tell if there is a user data object, possibly the last-but=one parameter.