atom feed20 messages in org.freebsd.freebsd-hackersC programming question
FromSent OnAttachments
MattApr 4, 2005 11:43 am 
Devon H. O'DellApr 4, 2005 11:49 am 
Marc OlzheimApr 4, 2005 11:49 am 
Joerg SonnenbergerApr 4, 2005 11:51 am 
Dan NelsonApr 4, 2005 11:55 am 
Mike MeyerApr 5, 2005 4:50 am 
gilles chehadeApr 5, 2005 4:50 am 
Dunceor .Apr 5, 2005 4:50 am 
ra...@redshift.comApr 5, 2005 5:25 am 
Peter JeremyApr 7, 2005 1:36 am 
Stijn HoopApr 7, 2005 1:39 am 
ra...@redshift.comApr 7, 2005 1:50 am 
ra...@redshift.comApr 7, 2005 1:51 am 
Zera William HolladayApr 7, 2005 7:24 am 
Robert WatsonApr 7, 2005 12:08 pm 
Michael ShalayeffJul 7, 2005 12:08 pm 
chatonJul 7, 2005 12:08 pm 
Juan J. MartínezJul 7, 2005 12:10 pm 
Juan J. MartínezJul 7, 2005 12:10 pm 
Mike MeyerJul 8, 2005 12:25 pm 
Subject:C programming question
From:Devon H. O'Dell (dod@offmyserver.com)
Date:Apr 4, 2005 11:49:00 am
List:org.freebsd.freebsd-hackers

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