access double pointer to a struct

[Oliver Wang]

hi all

I have a library function in the form of:

typedef struct {
 int fd;
} attr_t;


void read_attr( struct ** attr_t);

In C app, I would usually do:

attr_t  *myattr;
read_attr( & myattr);

However, as I wrap it with cffi:

attr_dp = cffi.new("attr_t **")
read_attr(attr_dp);

and I can't seem to get it right to access attr_t from this double pointer. Any idea?

thanks

Oliver

[Oliver Wang]

 

never mind, I made a mistake of using the returned pointer.

what I  should have done:

attr_p = attr_dp[0]
attr_p.fd // will give me what I need.

Oliver