118 #define	CIRCLEQ_HEAD_INITIALIZER(head)					\  argument
119 	{ (void *)&(head), (void *)&(head) }
130 #define	CIRCLEQ_EMPTY(head)	((head)->cqh_first == (void *)(head))  argument
132 #define	CIRCLEQ_FIRST(head)	((head)->cqh_first)  argument
134 #define	CIRCLEQ_FOREACH(var, head, field)				\  argument
135 	for ((var) = CIRCLEQ_FIRST((head));				\
136 	    (var) != (void *)(head) || ((var) = NULL);			\
139 #define	CIRCLEQ_FOREACH_REVERSE(var, head, field)			\  argument
140 	for ((var) = CIRCLEQ_LAST((head));				\
141 	    (var) != (void *)(head) || ((var) = NULL);			\
144 #define	CIRCLEQ_INIT(head) do {						\  argument
145 	CIRCLEQ_FIRST((head)) = (void *)(head);				\
146 	CIRCLEQ_LAST((head)) = (void *)(head);				\
149 #define	CIRCLEQ_INSERT_AFTER(head, listelm, elm, field) do {		\  argument
152 	if (CIRCLEQ_NEXT((listelm), field) == (void *)(head))		\
153 		CIRCLEQ_LAST((head)) = (elm);				\
159 #define	CIRCLEQ_INSERT_BEFORE(head, listelm, elm, field) do {		\  argument
162 	if (CIRCLEQ_PREV((listelm), field) == (void *)(head))		\
163 		CIRCLEQ_FIRST((head)) = (elm);				\
169 #define	CIRCLEQ_INSERT_HEAD(head, elm, field) do {			\  argument
170 	CIRCLEQ_NEXT((elm), field) = CIRCLEQ_FIRST((head));		\
171 	CIRCLEQ_PREV((elm), field) = (void *)(head);			\
172 	if (CIRCLEQ_LAST((head)) == (void *)(head))			\
173 		CIRCLEQ_LAST((head)) = (elm);				\
175 		CIRCLEQ_PREV(CIRCLEQ_FIRST((head)), field) = (elm);	\
176 	CIRCLEQ_FIRST((head)) = (elm);					\
179 #define	CIRCLEQ_INSERT_TAIL(head, elm, field) do {			\  argument
180 	CIRCLEQ_NEXT((elm), field) = (void *)(head);			\
181 	CIRCLEQ_PREV((elm), field) = CIRCLEQ_LAST((head));		\
182 	if (CIRCLEQ_FIRST((head)) == (void *)(head))			\
183 		CIRCLEQ_FIRST((head)) = (elm);				\
185 		CIRCLEQ_NEXT(CIRCLEQ_LAST((head)), field) = (elm);	\
186 	CIRCLEQ_LAST((head)) = (elm);					\
189 #define	CIRCLEQ_LAST(head)	((head)->cqh_last)  argument
195 #define	CIRCLEQ_REMOVE(head, elm, field) do {				\  argument
196 	if (CIRCLEQ_NEXT((elm), field) == (void *)(head))		\
197 		CIRCLEQ_LAST((head)) = CIRCLEQ_PREV((elm), field);	\
201 	if (CIRCLEQ_PREV((elm), field) == (void *)(head))		\
202 		CIRCLEQ_FIRST((head)) = CIRCLEQ_NEXT((elm), field);	\