freebsd-dev/sys/dev/usb/queue.addendum.h
1998-11-26 23:13:13 +00:00

30 lines
955 B
C

/* These definitions are taken from the NetBSD /sys/sys/queue.h file
* The copyright as in /sys/sys/queue.h from FreeBSD applies (they are the same)
*/
/* This was called SIMPLEQ
*/
#ifndef STAILQ_HEAD_INITIALIZER
#define STAILQ_HEAD_INITIALIZER(head) \
{ NULL, &(head).stqh_first }
#endif
/* This one was called SIMPLEQ_REMOVE_HEAD but removes not only the
* head element, but a whole queue of elements from the head.
*/
#ifndef STAILQ_REMOVE_HEAD_QUEUE
#define STAILQ_REMOVE_HEAD_QUEUE(head, elm, field) do { \
if (((head)->stqh_first = (elm)->field.stqe_next) == NULL) \
(head)->stqh_last = &(head)->stqh_first; \
} while (0)
#endif
/* This is called LIST and was called like that as well in the NetBSD version
*/
#ifndef LIST_HEAD_INITIALIZER
#define LIST_HEAD_INITIALIZER(head) \
{ NULL }
#endif