Hans Petter Selasky writes: > Hi, > > Why should LISTs only be forward traversable? The following piece of > code make lists backward traversable:
No objection to the concept. But... > /sys/sys/queue.h: > > +#define LIST_PREV(head,elm,field) \ > + (((elm) == LIST_FIRST(head)) ? ((__typeof(elm))0) : \ > + ((__typeof(elm))(((uint8_t *)((elm)->field.le_prev)) - \ > + ((uint8_t *)&LIST_NEXT((__typeof(elm))0,field))))) Please don't use typeof; it is a GCCism. Do you really mean NULL? M -- Mark R V Murray - Cert APS(Open) Dip Phys(Open) BSc Open(Open) _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
