C programming question

[Devon H. O'Dell]

On Mon, Apr 04, 2005 at 11:43:21AM -0700, Matt wrote:
> I need some help understanding some C code. 
> 
> int     (*if_ioctl)
>        (struct ifnet *, int, caddr_t);
> 
> int     (*if_watchdog)
>        (int);
> 
> Can someone break down these declarations (if that's what they are)?  Is 
> this a form of typecasting?  Thanks for your help.

These are pointers to functions accepting arguments of type:

struct ifnet *, int, caddr_t

and

int

both returning type integer. In the structure in which they are
defined, they can be called with 
structure.if_ioctl(ifnet, int, caddr_t)

Kind regards,

Devon H. O'Dell
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 187 bytes
Desc: not available
Url : http://lists.freebsd.org/pipermail/freebsd-hackers/attachments/20050404/5991a327/attachment.bin