queue.h

linux-2.6.15.6

}

#define	LIST_HEAD_INITIALIZER(head)					\
	{ NULL }

#define	LIST_ENTRY(type)						\
struct {								\
	struct type *le_next;	/* next element */			\
	struct type **le_prev;	/* address of previous next element */	\
}

/*
 * List functions.
 */

#define	LIST_EMPTY(head)	((head)->lh_first == NULL)

#define	LIST_FIRST(head)	((head)->lh_first)

#define	LIST_FOREACH(var, head, field)					\
	for ((var) = LIST_FIRST((head));				\
	    (var);							\
	    (var) = LIST_NEXT((var), field))

#define	LIST_INIT(head) do {						\
	LIST_FIRST((head)) = NULL;					\
} while (0)

#define	LIST_INSERT_AFTER(listelm, elm, field) do {			\
	if ((LIST_NEXT((elm), field) = LIST_NEXT((listelm), field)) != NULL)\
		LIST_NEXT((listelm), field)->field.le_prev =		\
		    &LIST_NEXT((elm), field);				\
	LIST_NEXT((listelm), field) = (elm);				\
	(elm)->field.le_prev = &LIST_NEXT((listelm), field);		\
} while (0)

#define	LIST_INSERT_BEFORE(listelm, elm, field) do {			\
	(elm)->field.le_prev = (listelm)->field.le_prev;		\
	LIST_NEXT((elm), field) = (listelm);				\
	*(listelm)->field.le_prev = (elm);				\
	(listelm)->field.le_prev = &LIST_NEXT((elm), field);		\
} while (0)

#define	LIST_INSERT_HEAD(head, elm, field) do {				\
	if ((LIST_NEXT((elm), field) = LIST_FIRST((head))) != NULL)	\
		LIST_FIRST((head))->field.le_prev = &LIST_NEXT((elm), field);\
	LIST_FIRST((head)) = (elm);					\
	(elm)->field.le_prev = &LIST_FIRST((head));			\
} while (0)

#define	LIST_NEXT(elm, field)	((elm)->field.le_next)

#define	LIST_REMOVE(elm, field) do {					\
	if (LIST_NEXT((elm), field) != NULL)				\
		LIST_NEXT((elm), field)->field.le_prev = 		\
		    (elm)->field.le_prev;				\
	*(elm)->field.le_prev = LIST_NEXT((elm), field);		\
} while (0)

/*
 * Tail queue declarations.
 */
#define	TAILQ_HEAD(name, type)						\
struct name {								\
	struct type *tqh_first;	/* first element */			\
	struct type **tqh_last;	/* addr of last next element */		\
}

#define	TAILQ_HEAD_INITIALIZER(head)					\
	{ NULL, &(head).tqh_first }

#define	TAILQ_ENTRY(type)						\
struct {								\
	struct type *tqe_next;	/* next element */			\
	struct type **tqe_prev;	/* address of previous next element */	\
}

/*
 * Tail queue functions.
 */
#define	TAILQ_EMPTY(head)	((head)->tqh_first == NULL)

#define	TAILQ_FIRST(head)	((head)->tqh_first)

#define	TAILQ_FOREACH(var, head, field)					\
	for ((var) = TAILQ_FIRST((head));				\
	    (var);							\
	    (var) = TAILQ_NEXT((var), field))

#define	TAILQ_FOREACH_REVERSE(var, head, headname, field)		\
	for ((var) = TAILQ_LAST((head), headname);			\
	    (var);							\
	    (var) = TAILQ_PREV((var), headname, field))

#define	TAILQ_INIT(head) do {						\
	TAILQ_FIRST((head)) = NULL;					\
	(head)->tqh_last = &TAILQ_FIRST((head));			\
} while (0)

#define	TAILQ_INSERT_AFTER(head, listelm, elm, field) do {		\
	if ((TAILQ_NEXT((elm), field) = TAILQ_NEXT((listelm), field)) != NULL)\
		TAILQ_NEXT((elm), field)->field.tqe_prev = 		\
		    &TAILQ_NEXT((elm), field);				\
	else								\
		(head)->tqh_last = &TAILQ_NEXT((elm), field);		\
	TAILQ_NEXT((listelm), field) = (elm);				\
	(elm)->field.tqe_prev = &TAILQ_NEXT((listelm), field);		\
} while (0)

#define	TAILQ_INSERT_BEFORE(listelm, elm, field) do {			\
	(elm)->field.tqe_prev = (listelm)->field.tqe_prev;		\
	TAILQ_NEXT((elm), field) = (listelm);				\
	*(listelm)->field.tqe_prev = (elm);				\
	(listelm)->field.tqe_prev = &TAILQ_NEXT((elm), field);		\
} while (0)

#define	TAILQ_INSERT_HEAD(head, elm, field) do {			\
	if ((TAILQ_NEXT((elm), field) = TAILQ_FIRST((head))) != NULL)	\
		TAILQ_FIRST((head))->field.tqe_prev =			\
		    &TAILQ_NEXT((elm), field);				\
	else								\
		(head)->tqh_last = &TAILQ_NEXT((elm), field);		\
	TAILQ_FIRST((head)) = (elm);					\
	(elm)->field.tqe_prev = &TAILQ_FIRST((head));			\
} while (0)

#define	TAILQ_INSERT_TAIL(head, elm, field) do {			\
	TAILQ_NEXT((elm), field) = NULL;				\
	(elm)->field.tqe_prev = (head)->tqh_last;			\
	*(head)->tqh_last = (elm);					\
	(head)->tqh_last = &TAILQ_NEXT((elm), field);			\
} while (0)

#define	TAILQ_LAST(head, headname)					\
	(*(((struct headname *)((head)->tqh_last))->tqh_last))

#define	TAILQ_NEXT(elm, field) ((elm)->field.tqe_next)

#define	TAILQ_PREV(elm, headname, field)				\
	(*(((struct headname *)((elm)->field.tqe_prev))->tqh_last))

#define	TAILQ_REMOVE(head, elm, field) do {				\
	if ((TAILQ_NEXT((elm), field)) != NULL)				\
		TAILQ_NEXT((elm), field)->field.tqe_prev = 		\
		    (elm)->field.tqe_prev;				\
	else								\
		(head)->tqh_last = (elm)->field.tqe_prev;		\
	*(elm)->field.tqe_prev = TAILQ_NEXT((elm), field);		\
} while (0)

/*
 * Circular queue declarations.
 */
#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)						\
struct {								\
	struct type *cqe_next;		/* next element */		\
	struct type *cqe_prev;		/* previous element */		\
}

/*
 * Circular queue functions.
 */
#define	CIRCLEQ_EMPTY(head)	((head)->cqh_first == (void *)(head))

#define	CIRCLEQ_FIRST(head)	((head)->cqh_first)

#define	CIRCLEQ_FOREACH(var, head, field)				\
	for ((var) = CIRCLEQ_FIRST((head));				\
	    (var) != (void *)(head);					\
	    (var) = CIRCLEQ_NEXT((var), field))

#define	CIRCLEQ_FOREACH_REVERSE(var, head, field)			\
	for ((var) = CIRCLEQ_LAST((head));				\
	    (var) != (void *)(head);					\
	    (var) = CIRCLEQ_PREV((var), field))

#define	CIRCLEQ_INIT(head) do {						\
	CIRCLEQ_FIRST((head)) = (void *)(head);				\
	CIRCLEQ_LAST((head)) = (void *)(head);				\
} while (0)

#define	CIRCLEQ_INSERT_AFTER(head, listelm, elm, field) do {		\
	CIRCLEQ_NEXT((elm), field) = CIRCLEQ_NEXT((listelm), field);	\
	CIRCLEQ_PREV((elm), field) = (listelm);				\
	if (CIRCLEQ_NEXT((listelm), field) == (void *)(head))		\
		CIRCLEQ_LAST((head)) = (elm);				\
	else								\
		CIRCLEQ_PREV(CIRCLEQ_NEXT((listelm), field), field) = (elm);\
	CIRCLEQ_NEXT((listelm), field) = (elm);				\
} while (0)

#define	CIRCLEQ_INSERT_BEFORE(head, listelm, elm, field) do {		\
	CIRCLEQ_NEXT((elm), field) = (listelm);				\
	CIRCLEQ_PREV((elm), field) = CIRCLEQ_PREV((listelm), field);	\
	if (CIRCLEQ_PREV((listelm), field) == (void *)(head))		\
		CIRCLEQ_FIRST((head)) = (elm);				\
	else								\
		CIRCLEQ_NEXT(CIRCLEQ_PREV((listelm), field), field) = (elm);\
	CIRCLEQ_PREV((listelm), field) = (elm);				\
} while (0)

#define	CIRCLEQ_INSERT_HEAD(head, elm, field) do {			\
	CIRCLEQ_NEXT((elm), field) = CIRCLEQ_FIRST((head));		\
	CIRCLEQ_PREV((elm), field) = (void *)(head);			\
	if (CIRCLEQ_LAST((head)) == (void *)(head))			\
		CIRCLEQ_LAST((head)) = (elm);				\
	else								\
		CIRCLEQ_PREV(CIRCLEQ_FIRST((head)), field) = (elm);	\
	CIRCLEQ_FIRST((head)) = (elm);					\
} while (0)

#define	CIRCLEQ_INSERT_TAIL(head, elm, field) do {			\
	CIRCLEQ_NEXT((elm), field) = (void *)(head);			\
	CIRCLEQ_PREV((elm), field) = CIRCLEQ_LAST((head));		\
	if (CIRCLEQ_FIRST((head)) == (void *)(head))			\
		CIRCLEQ_FIRST((head)) = (elm);				\
	else								\
		CIRCLEQ_NEXT(CIRCLEQ_LAST((head)), field) = (elm);	\
	CIRCLEQ_LAST((head)) = (elm);					\
} while (0)

#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_REMOVE(head, elm, field) do {				\
	if (CIRCLEQ_NEXT((elm), field) == (void *)(head))		\
		CIRCLEQ_LAST((head)) = CIRCLEQ_PREV((elm), field);	\
	else								\
		CIRCLEQ_PREV(CIRCLEQ_NEXT((elm), field), field) =	\
		    CIRCLEQ_PREV((elm), field);				\
	if (CIRCLEQ_PREV((elm), field) == (void *)(head))		\
		CIRCLEQ_FIRST((head)) = CIRCLEQ_NEXT((elm), field);	\
	else								\
		CIRCLEQ_NEXT(CIRCLEQ_PREV((elm), field), field) =	\
		    CIRCLEQ_NEXT((elm), field);				\
} while (0)

#endif /* !_SYS_QUEUE_H_ */