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-rw-r--r--misc/sys/queue.h420
1 files changed, 52 insertions, 368 deletions
diff --git a/misc/sys/queue.h b/misc/sys/queue.h
index b0e6b38c19..5b6e2a0a23 100644
--- a/misc/sys/queue.h
+++ b/misc/sys/queue.h
@@ -10,7 +10,7 @@
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
+ * 4. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *
@@ -26,46 +26,29 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	@(#)queue.h	8.5 (Berkeley) 8/20/94
+ *	@(#)queue.h	8.3 (Berkeley) 12/13/93
  */
 
-#ifndef	_SYS_QUEUE_H_
-#define	_SYS_QUEUE_H_
+#ifndef	_SYS_QUEUE_H
+#define	_SYS_QUEUE_H 1
 
 /*
- * This file defines five types of data structures: singly-linked lists,
- * lists, simple queues, tail queues, and circular queues.
- *
- * A singly-linked list is headed by a single forward pointer. The
- * elements are singly linked for minimum space and pointer manipulation
- * overhead at the expense of O(n) removal for arbitrary elements. New
- * elements can be added to the list after an existing element or at the
- * head of the list.  Elements being removed from the head of the list
- * should use the explicit macro for this purpose for optimum
- * efficiency. A singly-linked list may only be traversed in the forward
- * direction.  Singly-linked lists are ideal for applications with large
- * datasets and few or no removals or for implementing a LIFO queue.
+ * This file defines three types of data structures: lists, tail queues,
+ * and circular queues.
  *
  * A list is headed by a single forward pointer (or an array of forward
  * pointers for a hash table header). The elements are doubly linked
  * so that an arbitrary element can be removed without a need to
- * traverse the list. New elements can be added to the list before
- * or after an existing element or at the head of the list. A list
- * may only be traversed in the forward direction.
- *
- * A simple queue is headed by a pair of pointers, one the head of the
- * list and the other to the tail of the list. The elements are singly
- * linked to save space, so elements can only be removed from the
- * head of the list. New elements can be added to the list after
- * an existing element, at the head of the list, or at the end of the
- * list. A simple queue may only be traversed in the forward direction.
+ * traverse the list. New elements can be added to the list after
+ * an existing element or at the head of the list. A list may only be
+ * traversed in the forward direction.
  *
  * A tail queue is headed by a pair of pointers, one to the head of the
  * list and the other to the tail of the list. The elements are doubly
  * linked so that an arbitrary element can be removed without a need to
- * traverse the list. New elements can be added to the list before or
- * after an existing element, at the head of the list, or at the end of
- * the list. A tail queue may be traversed in either direction.
+ * traverse the list. New elements can be added to the list after
+ * an existing element, at the head of the list, or at the end of the
+ * list. A tail queue may only be traversed in the forward direction.
  *
  * A circle queue is headed by a pair of pointers, one to the head of the
  * list and the other to the tail of the list. The elements are doubly
@@ -81,15 +64,12 @@
 /*
  * List definitions.
  */
-#define	LIST_HEAD(name, type)						\
+#define LIST_HEAD(name, type)						\
 struct name {								\
 	struct type *lh_first;	/* first element */			\
 }
 
-#define	LIST_HEAD_INITIALIZER(head)					\
-	{ NULL }
-
-#define	LIST_ENTRY(type)						\
+#define LIST_ENTRY(type)						\
 struct {								\
 	struct type *le_next;	/* next element */			\
 	struct type **le_prev;	/* address of previous next element */	\
@@ -98,307 +78,73 @@ struct {								\
 /*
  * List functions.
  */
-#define	LIST_INIT(head) do {						\
+#define	LIST_INIT(head) {						\
 	(head)->lh_first = NULL;					\
-} while (/*CONSTCOND*/0)
+}
 
-#define	LIST_INSERT_AFTER(listelm, elm, field) do {			\
+#define LIST_INSERT_AFTER(listelm, elm, field) {			\
 	if (((elm)->field.le_next = (listelm)->field.le_next) != NULL)	\
 		(listelm)->field.le_next->field.le_prev =		\
 		    &(elm)->field.le_next;				\
 	(listelm)->field.le_next = (elm);				\
 	(elm)->field.le_prev = &(listelm)->field.le_next;		\
-} while (/*CONSTCOND*/0)
-
-#define	LIST_INSERT_BEFORE(listelm, elm, field) do {			\
-	(elm)->field.le_prev = (listelm)->field.le_prev;		\
-	(elm)->field.le_next = (listelm);				\
-	*(listelm)->field.le_prev = (elm);				\
-	(listelm)->field.le_prev = &(elm)->field.le_next;		\
-} while (/*CONSTCOND*/0)
+}
 
-#define	LIST_INSERT_HEAD(head, elm, field) do {				\
+#define LIST_INSERT_HEAD(head, elm, field) {				\
 	if (((elm)->field.le_next = (head)->lh_first) != NULL)		\
 		(head)->lh_first->field.le_prev = &(elm)->field.le_next;\
 	(head)->lh_first = (elm);					\
 	(elm)->field.le_prev = &(head)->lh_first;			\
-} while (/*CONSTCOND*/0)
+}
 
-#define	LIST_REMOVE(elm, field) do {					\
+#define LIST_REMOVE(elm, field) {					\
 	if ((elm)->field.le_next != NULL)				\
 		(elm)->field.le_next->field.le_prev = 			\
 		    (elm)->field.le_prev;				\
 	*(elm)->field.le_prev = (elm)->field.le_next;			\
-} while (/*CONSTCOND*/0)
-
-#define	LIST_FOREACH(var, head, field)					\
-	for ((var) = ((head)->lh_first);				\
-		(var);							\
-		(var) = ((var)->field.le_next))
-
-/*
- * List access methods.
- */
-#define	LIST_EMPTY(head)		((head)->lh_first == NULL)
-#define	LIST_FIRST(head)		((head)->lh_first)
-#define	LIST_NEXT(elm, field)		((elm)->field.le_next)
-
-
-/*
- * Singly-linked List definitions.
- */
-#define	SLIST_HEAD(name, type)						\
-struct name {								\
-	struct type *slh_first;	/* first element */			\
-}
-
-#define	SLIST_HEAD_INITIALIZER(head)					\
-	{ NULL }
-
-#define	SLIST_ENTRY(type)						\
-struct {								\
-	struct type *sle_next;	/* next element */			\
-}
-
-/*
- * Singly-linked List functions.
- */
-#define	SLIST_INIT(head) do {						\
-	(head)->slh_first = NULL;					\
-} while (/*CONSTCOND*/0)
-
-#define	SLIST_INSERT_AFTER(slistelm, elm, field) do {			\
-	(elm)->field.sle_next = (slistelm)->field.sle_next;		\
-	(slistelm)->field.sle_next = (elm);				\
-} while (/*CONSTCOND*/0)
-
-#define	SLIST_INSERT_HEAD(head, elm, field) do {			\
-	(elm)->field.sle_next = (head)->slh_first;			\
-	(head)->slh_first = (elm);					\
-} while (/*CONSTCOND*/0)
-
-#define	SLIST_REMOVE_HEAD(head, field) do {				\
-	(head)->slh_first = (head)->slh_first->field.sle_next;		\
-} while (/*CONSTCOND*/0)
-
-#define	SLIST_REMOVE(head, elm, type, field) do {			\
-	if ((head)->slh_first == (elm)) {				\
-		SLIST_REMOVE_HEAD((head), field);			\
-	}								\
-	else {								\
-		struct type *curelm = (head)->slh_first;		\
-		while(curelm->field.sle_next != (elm))			\
-			curelm = curelm->field.sle_next;		\
-		curelm->field.sle_next =				\
-		    curelm->field.sle_next->field.sle_next;		\
-	}								\
-} while (/*CONSTCOND*/0)
-
-#define	SLIST_FOREACH(var, head, field)					\
-	for((var) = (head)->slh_first; (var); (var) = (var)->field.sle_next)
-
-/*
- * Singly-linked List access methods.
- */
-#define	SLIST_EMPTY(head)	((head)->slh_first == NULL)
-#define	SLIST_FIRST(head)	((head)->slh_first)
-#define	SLIST_NEXT(elm, field)	((elm)->field.sle_next)
-
-
-/*
- * Singly-linked Tail queue declarations.
- */
-#define	STAILQ_HEAD(name, type)					\
-struct name {								\
-	struct type *stqh_first;	/* first element */			\
-	struct type **stqh_last;	/* addr of last next element */		\
-}
-
-#define	STAILQ_HEAD_INITIALIZER(head)					\
-	{ NULL, &(head).stqh_first }
-
-#define	STAILQ_ENTRY(type)						\
-struct {								\
-	struct type *stqe_next;	/* next element */			\
-}
-
-/*
- * Singly-linked Tail queue functions.
- */
-#define	STAILQ_INIT(head) do {						\
-	(head)->stqh_first = NULL;					\
-	(head)->stqh_last = &(head)->stqh_first;				\
-} while (/*CONSTCOND*/0)
-
-#define	STAILQ_INSERT_HEAD(head, elm, field) do {			\
-	if (((elm)->field.stqe_next = (head)->stqh_first) == NULL)	\
-		(head)->stqh_last = &(elm)->field.stqe_next;		\
-	(head)->stqh_first = (elm);					\
-} while (/*CONSTCOND*/0)
-
-#define	STAILQ_INSERT_TAIL(head, elm, field) do {			\
-	(elm)->field.stqe_next = NULL;					\
-	*(head)->stqh_last = (elm);					\
-	(head)->stqh_last = &(elm)->field.stqe_next;			\
-} while (/*CONSTCOND*/0)
-
-#define	STAILQ_INSERT_AFTER(head, listelm, elm, field) do {		\
-	if (((elm)->field.stqe_next = (listelm)->field.stqe_next) == NULL)\
-		(head)->stqh_last = &(elm)->field.stqe_next;		\
-	(listelm)->field.stqe_next = (elm);				\
-} while (/*CONSTCOND*/0)
-
-#define	STAILQ_REMOVE_HEAD(head, field) do {				\
-	if (((head)->stqh_first = (head)->stqh_first->field.stqe_next) == NULL) \
-		(head)->stqh_last = &(head)->stqh_first;			\
-} while (/*CONSTCOND*/0)
-
-#define	STAILQ_REMOVE(head, elm, type, field) do {			\
-	if ((head)->stqh_first == (elm)) {				\
-		STAILQ_REMOVE_HEAD((head), field);			\
-	} else {							\
-		struct type *curelm = (head)->stqh_first;		\
-		while (curelm->field.stqe_next != (elm))			\
-			curelm = curelm->field.stqe_next;		\
-		if ((curelm->field.stqe_next =				\
-			curelm->field.stqe_next->field.stqe_next) == NULL) \
-			    (head)->stqh_last = &(curelm)->field.stqe_next; \
-	}								\
-} while (/*CONSTCOND*/0)
-
-#define	STAILQ_FOREACH(var, head, field)				\
-	for ((var) = ((head)->stqh_first);				\
-		(var);							\
-		(var) = ((var)->field.stqe_next))
-
-/*
- * Singly-linked Tail queue access methods.
- */
-#define	STAILQ_EMPTY(head)	((head)->stqh_first == NULL)
-#define	STAILQ_FIRST(head)	((head)->stqh_first)
-#define	STAILQ_NEXT(elm, field)	((elm)->field.stqe_next)
-
-
-/*
- * Simple queue definitions.
- */
-#define	SIMPLEQ_HEAD(name, type)					\
-struct name {								\
-	struct type *sqh_first;	/* first element */			\
-	struct type **sqh_last;	/* addr of last next element */		\
-}
-
-#define	SIMPLEQ_HEAD_INITIALIZER(head)					\
-	{ NULL, &(head).sqh_first }
-
-#define	SIMPLEQ_ENTRY(type)						\
-struct {								\
-	struct type *sqe_next;	/* next element */			\
 }
 
 /*
- * Simple queue functions.
- */
-#define	SIMPLEQ_INIT(head) do {						\
-	(head)->sqh_first = NULL;					\
-	(head)->sqh_last = &(head)->sqh_first;				\
-} while (/*CONSTCOND*/0)
-
-#define	SIMPLEQ_INSERT_HEAD(head, elm, field) do {			\
-	if (((elm)->field.sqe_next = (head)->sqh_first) == NULL)	\
-		(head)->sqh_last = &(elm)->field.sqe_next;		\
-	(head)->sqh_first = (elm);					\
-} while (/*CONSTCOND*/0)
-
-#define	SIMPLEQ_INSERT_TAIL(head, elm, field) do {			\
-	(elm)->field.sqe_next = NULL;					\
-	*(head)->sqh_last = (elm);					\
-	(head)->sqh_last = &(elm)->field.sqe_next;			\
-} while (/*CONSTCOND*/0)
-
-#define	SIMPLEQ_INSERT_AFTER(head, listelm, elm, field) do {		\
-	if (((elm)->field.sqe_next = (listelm)->field.sqe_next) == NULL)\
-		(head)->sqh_last = &(elm)->field.sqe_next;		\
-	(listelm)->field.sqe_next = (elm);				\
-} while (/*CONSTCOND*/0)
-
-#define	SIMPLEQ_REMOVE_HEAD(head, field) do {				\
-	if (((head)->sqh_first = (head)->sqh_first->field.sqe_next) == NULL) \
-		(head)->sqh_last = &(head)->sqh_first;			\
-} while (/*CONSTCOND*/0)
-
-#define	SIMPLEQ_REMOVE(head, elm, type, field) do {			\
-	if ((head)->sqh_first == (elm)) {				\
-		SIMPLEQ_REMOVE_HEAD((head), field);			\
-	} else {							\
-		struct type *curelm = (head)->sqh_first;		\
-		while (curelm->field.sqe_next != (elm))			\
-			curelm = curelm->field.sqe_next;		\
-		if ((curelm->field.sqe_next =				\
-			curelm->field.sqe_next->field.sqe_next) == NULL) \
-			    (head)->sqh_last = &(curelm)->field.sqe_next; \
-	}								\
-} while (/*CONSTCOND*/0)
-
-#define	SIMPLEQ_FOREACH(var, head, field)				\
-	for ((var) = ((head)->sqh_first);				\
-		(var);							\
-		(var) = ((var)->field.sqe_next))
-
-/*
- * Simple queue access methods.
- */
-#define	SIMPLEQ_EMPTY(head)		((head)->sqh_first == NULL)
-#define	SIMPLEQ_FIRST(head)		((head)->sqh_first)
-#define	SIMPLEQ_NEXT(elm, field)	((elm)->field.sqe_next)
-
-
-/*
  * Tail queue definitions.
  */
-#define	_TAILQ_HEAD(name, type, qual)					\
+#define TAILQ_HEAD(name, type)						\
 struct name {								\
-	qual type *tqh_first;		/* first element */		\
-	qual type *qual *tqh_last;	/* addr of last next element */	\
+	struct type *tqh_first;	/* first element */			\
+	struct type **tqh_last;	/* addr of last next element */		\
 }
-#define TAILQ_HEAD(name, type)	_TAILQ_HEAD(name, struct type,)
-
-#define	TAILQ_HEAD_INITIALIZER(head)					\
-	{ NULL, &(head).tqh_first }
 
-#define	_TAILQ_ENTRY(type, qual)					\
+#define TAILQ_ENTRY(type)						\
 struct {								\
-	qual type *tqe_next;		/* next element */		\
-	qual type *qual *tqe_prev;	/* address of previous next element */\
+	struct type *tqe_next;	/* next element */			\
+	struct type **tqe_prev;	/* address of previous next element */	\
 }
-#define TAILQ_ENTRY(type)	_TAILQ_ENTRY(struct type,)
 
 /*
  * Tail queue functions.
  */
-#define	TAILQ_INIT(head) do {						\
+#define	TAILQ_INIT(head) {						\
 	(head)->tqh_first = NULL;					\
 	(head)->tqh_last = &(head)->tqh_first;				\
-} while (/*CONSTCOND*/0)
+}
 
-#define	TAILQ_INSERT_HEAD(head, elm, field) do {			\
+#define TAILQ_INSERT_HEAD(head, elm, field) {				\
 	if (((elm)->field.tqe_next = (head)->tqh_first) != NULL)	\
-		(head)->tqh_first->field.tqe_prev =			\
+		(elm)->field.tqe_next->field.tqe_prev =			\
 		    &(elm)->field.tqe_next;				\
 	else								\
 		(head)->tqh_last = &(elm)->field.tqe_next;		\
 	(head)->tqh_first = (elm);					\
 	(elm)->field.tqe_prev = &(head)->tqh_first;			\
-} while (/*CONSTCOND*/0)
+}
 
-#define	TAILQ_INSERT_TAIL(head, elm, field) do {			\
+#define TAILQ_INSERT_TAIL(head, elm, field) {				\
 	(elm)->field.tqe_next = NULL;					\
 	(elm)->field.tqe_prev = (head)->tqh_last;			\
 	*(head)->tqh_last = (elm);					\
 	(head)->tqh_last = &(elm)->field.tqe_next;			\
-} while (/*CONSTCOND*/0)
+}
 
-#define	TAILQ_INSERT_AFTER(head, listelm, elm, field) do {		\
+#define TAILQ_INSERT_AFTER(head, listelm, elm, field) {			\
 	if (((elm)->field.tqe_next = (listelm)->field.tqe_next) != NULL)\
 		(elm)->field.tqe_next->field.tqe_prev = 		\
 		    &(elm)->field.tqe_next;				\
@@ -406,60 +152,27 @@ struct {								\
 		(head)->tqh_last = &(elm)->field.tqe_next;		\
 	(listelm)->field.tqe_next = (elm);				\
 	(elm)->field.tqe_prev = &(listelm)->field.tqe_next;		\
-} while (/*CONSTCOND*/0)
-
-#define	TAILQ_INSERT_BEFORE(listelm, elm, field) do {			\
-	(elm)->field.tqe_prev = (listelm)->field.tqe_prev;		\
-	(elm)->field.tqe_next = (listelm);				\
-	*(listelm)->field.tqe_prev = (elm);				\
-	(listelm)->field.tqe_prev = &(elm)->field.tqe_next;		\
-} while (/*CONSTCOND*/0)
+}
 
-#define	TAILQ_REMOVE(head, elm, field) do {				\
+#define TAILQ_REMOVE(head, elm, field) {				\
 	if (((elm)->field.tqe_next) != NULL)				\
 		(elm)->field.tqe_next->field.tqe_prev = 		\
 		    (elm)->field.tqe_prev;				\
 	else								\
 		(head)->tqh_last = (elm)->field.tqe_prev;		\
 	*(elm)->field.tqe_prev = (elm)->field.tqe_next;			\
-} while (/*CONSTCOND*/0)
-
-#define	TAILQ_FOREACH(var, head, field)					\
-	for ((var) = ((head)->tqh_first);				\
-		(var);							\
-		(var) = ((var)->field.tqe_next))
-
-#define	TAILQ_FOREACH_REVERSE(var, head, headname, field)		\
-	for ((var) = (*(((struct headname *)((head)->tqh_last))->tqh_last));	\
-		(var);							\
-		(var) = (*(((struct headname *)((var)->field.tqe_prev))->tqh_last)))
-
-/*
- * Tail queue access methods.
- */
-#define	TAILQ_EMPTY(head)		((head)->tqh_first == NULL)
-#define	TAILQ_FIRST(head)		((head)->tqh_first)
-#define	TAILQ_NEXT(elm, field)		((elm)->field.tqe_next)
-
-#define	TAILQ_LAST(head, headname) \
-	(*(((struct headname *)((head)->tqh_last))->tqh_last))
-#define	TAILQ_PREV(elm, headname, field) \
-	(*(((struct headname *)((elm)->field.tqe_prev))->tqh_last))
-
+}
 
 /*
  * Circular queue definitions.
  */
-#define	CIRCLEQ_HEAD(name, type)					\
+#define CIRCLEQ_HEAD(name, type)					\
 struct name {								\
 	struct type *cqh_first;		/* first element */		\
 	struct type *cqh_last;		/* last element */		\
 }
 
-#define	CIRCLEQ_HEAD_INITIALIZER(head)					\
-	{ (void *)&head, (void *)&head }
-
-#define	CIRCLEQ_ENTRY(type)						\
+#define CIRCLEQ_ENTRY(type)						\
 struct {								\
 	struct type *cqe_next;		/* next element */		\
 	struct type *cqe_prev;		/* previous element */		\
@@ -468,12 +181,12 @@ struct {								\
 /*
  * Circular queue functions.
  */
-#define	CIRCLEQ_INIT(head) do {						\
+#define	CIRCLEQ_INIT(head) {						\
 	(head)->cqh_first = (void *)(head);				\
 	(head)->cqh_last = (void *)(head);				\
-} while (/*CONSTCOND*/0)
+}
 
-#define	CIRCLEQ_INSERT_AFTER(head, listelm, elm, field) do {		\
+#define CIRCLEQ_INSERT_AFTER(head, listelm, elm, field) {		\
 	(elm)->field.cqe_next = (listelm)->field.cqe_next;		\
 	(elm)->field.cqe_prev = (listelm);				\
 	if ((listelm)->field.cqe_next == (void *)(head))		\
@@ -481,9 +194,9 @@ struct {								\
 	else								\
 		(listelm)->field.cqe_next->field.cqe_prev = (elm);	\
 	(listelm)->field.cqe_next = (elm);				\
-} while (/*CONSTCOND*/0)
+}
 
-#define	CIRCLEQ_INSERT_BEFORE(head, listelm, elm, field) do {		\
+#define CIRCLEQ_INSERT_BEFORE(head, listelm, elm, field) {		\
 	(elm)->field.cqe_next = (listelm);				\
 	(elm)->field.cqe_prev = (listelm)->field.cqe_prev;		\
 	if ((listelm)->field.cqe_prev == (void *)(head))		\
@@ -491,9 +204,9 @@ struct {								\
 	else								\
 		(listelm)->field.cqe_prev->field.cqe_next = (elm);	\
 	(listelm)->field.cqe_prev = (elm);				\
-} while (/*CONSTCOND*/0)
+}
 
-#define	CIRCLEQ_INSERT_HEAD(head, elm, field) do {			\
+#define CIRCLEQ_INSERT_HEAD(head, elm, field) {				\
 	(elm)->field.cqe_next = (head)->cqh_first;			\
 	(elm)->field.cqe_prev = (void *)(head);				\
 	if ((head)->cqh_last == (void *)(head))				\
@@ -501,9 +214,9 @@ struct {								\
 	else								\
 		(head)->cqh_first->field.cqe_prev = (elm);		\
 	(head)->cqh_first = (elm);					\
-} while (/*CONSTCOND*/0)
+}
 
-#define	CIRCLEQ_INSERT_TAIL(head, elm, field) do {			\
+#define CIRCLEQ_INSERT_TAIL(head, elm, field) {				\
 	(elm)->field.cqe_next = (void *)(head);				\
 	(elm)->field.cqe_prev = (head)->cqh_last;			\
 	if ((head)->cqh_first == (void *)(head))			\
@@ -511,9 +224,9 @@ struct {								\
 	else								\
 		(head)->cqh_last->field.cqe_next = (elm);		\
 	(head)->cqh_last = (elm);					\
-} while (/*CONSTCOND*/0)
+}
 
-#define	CIRCLEQ_REMOVE(head, elm, field) do {				\
+#define	CIRCLEQ_REMOVE(head, elm, field) {				\
 	if ((elm)->field.cqe_next == (void *)(head))			\
 		(head)->cqh_last = (elm)->field.cqe_prev;		\
 	else								\
@@ -524,34 +237,5 @@ struct {								\
 	else								\
 		(elm)->field.cqe_prev->field.cqe_next =			\
 		    (elm)->field.cqe_next;				\
-} while (/*CONSTCOND*/0)
-
-#define	CIRCLEQ_FOREACH(var, head, field)				\
-	for ((var) = ((head)->cqh_first);				\
-		(var) != (const void *)(head);				\
-		(var) = ((var)->field.cqe_next))
-
-#define	CIRCLEQ_FOREACH_REVERSE(var, head, field)			\
-	for ((var) = ((head)->cqh_last);				\
-		(var) != (const void *)(head);				\
-		(var) = ((var)->field.cqe_prev))
-
-/*
- * Circular queue access methods.
- */
-#define	CIRCLEQ_EMPTY(head)		((head)->cqh_first == (void *)(head))
-#define	CIRCLEQ_FIRST(head)		((head)->cqh_first)
-#define	CIRCLEQ_LAST(head)		((head)->cqh_last)
-#define	CIRCLEQ_NEXT(elm, field)	((elm)->field.cqe_next)
-#define	CIRCLEQ_PREV(elm, field)	((elm)->field.cqe_prev)
-
-#define CIRCLEQ_LOOP_NEXT(head, elm, field)				\
-	(((elm)->field.cqe_next == (void *)(head))			\
-	    ? ((head)->cqh_first)					\
-	    : (elm->field.cqe_next))
-#define CIRCLEQ_LOOP_PREV(head, elm, field)				\
-	(((elm)->field.cqe_prev == (void *)(head))			\
-	    ? ((head)->cqh_last)					\
-	    : (elm->field.cqe_prev))
-
+}
 #endif	/* sys/queue.h */