Question

Please help me understand what this typedef is doing??

typedef void (xyz) (void *data);
extern struct x* FUNCTION(xyz *ptr);

Here is my understanding: in 1st line xyz is a function returning void and taking void pointer as an argument. But I cant interpret 2nd line with this understanding.

Any input is appreciable.

Answer 1

There is an external function called FUNCTION which takes a pointer to an xyz function as parameter and returns a pointer to a struct x.