Date: Sun, 21 Nov 1999 18:35:25 -0800 (PST) From: jburkhol@home.com To: FreeBSD-gnats-submit@freebsd.org Subject: docs/15036: update of queue manpage Message-ID: <19991122023525.A0C531F9D@24.66.174.118.bc.wave.home.com>
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>Number: 15036
>Category: docs
>Synopsis: update of queue manpage
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-doc
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: change-request
>Submitter-Id: current-users
>Arrival-Date: Sun Nov 21 18:40:01 PST 1999
>Closed-Date:
>Last-Modified:
>Originator: Jake Burkholder
>Release: FreeBSD 4.0-CURRENT i386
>Organization:
none
>Environment:
4.0-CURRENT
>Description:
The queue manpage is seriously out of date; sync with reality.
Document *_FIRST, *_FOREACH, *_LAST, *_NEXT, and *_PREV where applicable,
and make example code actually use the macros.
>How-To-Repeat:
n/a
>Fix:
Index: share/man/man3/queue.3
===================================================================
RCS file: /home/ncvs/src/share/man/man3/queue.3,v
retrieving revision 1.14
diff -c -r1.14 queue.3
*** queue.3 1999/08/28 00:19:44 1.14
--- queue.3 1999/11/22 02:23:54
***************
*** 39,44 ****
--- 39,45 ----
.Nm SLIST_EMPTY ,
.Nm SLIST_ENTRY ,
.Nm SLIST_FIRST ,
+ .Nm SLIST_FOREACH ,
.Nm SLIST_HEAD ,
.Nm SLIST_INIT ,
.Nm SLIST_INSERT_AFTER ,
***************
*** 46,69 ****
--- 47,80 ----
.Nm SLIST_NEXT ,
.Nm SLIST_REMOVE_HEAD ,
.Nm SLIST_REMOVE ,
+ .Nm STAILQ_EMPTY ,
.Nm STAILQ_ENTRY ,
+ .Nm STAILQ_FIRST ,
+ .Nm STAILQ_FOREACH ,
.Nm STAILQ_HEAD ,
.Nm STAILQ_INIT ,
.Nm STAILQ_INSERT_AFTER ,
.Nm STAILQ_INSERT_HEAD ,
.Nm STAILQ_INSERT_TAIL ,
+ .Nm STAILQ_LAST ,
+ .Nm STAILQ_NEXT ,
.Nm STAILQ_REMOVE_HEAD ,
.Nm STAILQ_REMOVE ,
+ .Nm LIST_EMPTY ,
.Nm LIST_ENTRY ,
+ .Nm LIST_FIRST ,
+ .Nm LIST_FOREACH ,
.Nm LIST_HEAD ,
.Nm LIST_INIT ,
.Nm LIST_INSERT_AFTER ,
.Nm LIST_INSERT_BEFORE ,
.Nm LIST_INSERT_HEAD ,
+ .Nm LIST_NEXT ,
.Nm LIST_REMOVE ,
.Nm TAILQ_EMPTY ,
.Nm TAILQ_ENTRY ,
.Nm TAILQ_FIRST ,
+ .Nm TAILQ_FOREACH ,
.Nm TAILQ_HEAD ,
.Nm TAILQ_INIT ,
.Nm TAILQ_INSERT_AFTER ,
***************
*** 72,85 ****
--- 83,103 ----
.Nm TAILQ_INSERT_TAIL ,
.Nm TAILQ_LAST ,
.Nm TAILQ_NEXT ,
+ .Nm TAILQ_PREV ,
.Nm TAILQ_REMOVE ,
+ .Nm CIRCLEQ_EMPTY ,
.Nm CIRCLEQ_ENTRY ,
+ .Nm CIRCLEQ_FIRST ,
+ .Nm CIRCLEQ_FOREACH ,
.Nm CIRCLEQ_HEAD ,
.Nm CIRCLEQ_INIT ,
.Nm CIRCLEQ_INSERT_AFTER ,
.Nm CIRCLEQ_INSERT_BEFORE ,
.Nm CIRCLEQ_INSERT_HEAD ,
.Nm CIRCLEQ_INSERT_TAIL ,
+ .Nm CIRCLE_LAST ,
+ .Nm CIRCLE_NEXT ,
+ .Nm CIRCLE_PREV ,
.Nm CIRCLEQ_REMOVE
.Nd implementations of singly-linked lists, singly-linked tail queues,
lists, tail queues, and circular queues
***************
*** 89,94 ****
--- 107,113 ----
.Fn SLIST_EMPTY "SLIST_HEAD *head"
.Fn SLIST_ENTRY "TYPE"
.Fn SLIST_FIRST "SLIST_HEAD *head"
+ .Fn SLIST_FOREACH "TYPE *var" "SLIST_HEAD *head" "SLIST_ENTRY NAME"
.Fn SLIST_HEAD "HEADNAME" "TYPE"
.Fn SLIST_INIT "SLIST_HEAD *head"
.Fn SLIST_INSERT_AFTER "TYPE *listelm" "TYPE *elm" "SLIST_ENTRY NAME"
***************
*** 97,139 ****
.Fn SLIST_REMOVE_HEAD "SLIST_HEAD *head" "SLIST_ENTRY NAME"
.Fn SLIST_REMOVE "SLIST_HEAD *head" "TYPE *elm" "TYPE" "SLIST_ENTRY NAME"
.\"
.Fn STAILQ_ENTRY "TYPE"
.Fn STAILQ_HEAD "HEADNAME" "TYPE"
.Fn STAILQ_INIT "STAILQ_HEAD *head"
.Fn STAILQ_INSERT_AFTER "STAILQ_HEAD *head" "TYPE *listelm" "TYPE *elm" "STAILQ_ENTRY NAME"
.Fn STAILQ_INSERT_HEAD "STAILQ_HEAD *head" "TYPE *elm" "STAILQ_ENTRY NAME"
.Fn STAILQ_INSERT_TAIL "STAILQ_HEAD *head" "TYPE *elm" "STAILQ_ENTRY NAME"
.Fn STAILQ_REMOVE_HEAD "STAILQ_HEAD *head" "STAILQ_ENTRY NAME"
.Fn STAILQ_REMOVE "STAILQ_HEAD *head" "TYPE *elm" "TYPE" "STAILQ_ENTRY NAME"
.\"
.Fn LIST_ENTRY "TYPE"
.Fn LIST_HEAD "HEADNAME" "TYPE"
.Fn LIST_INIT "LIST_HEAD *head"
.Fn LIST_INSERT_AFTER "TYPE *listelm" "TYPE *elm" "LIST_ENTRY NAME"
.Fn LIST_INSERT_BEFORE "TYPE *listelm" "TYPE *elm" "LIST_ENTRY NAME"
.Fn LIST_INSERT_HEAD "LIST_HEAD *head" "TYPE *elm" "LIST_ENTRY NAME"
.Fn LIST_REMOVE "TYPE *elm" "LIST_ENTRY NAME"
.\"
.Fn TAILQ_EMPTY "TAILQ_HEAD *head"
.Fn TAILQ_ENTRY "TYPE"
.Fn TAILQ_FIRST "TAILQ_HEAD *head"
.Fn TAILQ_HEAD "HEADNAME" "TYPE"
.Fn TAILQ_INIT "TAILQ_HEAD *head"
.Fn TAILQ_INSERT_AFTER "TAILQ_HEAD *head" "TYPE *listelm" "TYPE *elm" "TAILQ_ENTRY NAME"
.Fn TAILQ_INSERT_BEFORE "TYPE *listelm" "TYPE *elm" "TAILQ_ENTRY NAME"
.Fn TAILQ_INSERT_HEAD "TAILQ_HEAD *head" "TYPE *elm" "TAILQ_ENTRY NAME"
.Fn TAILQ_INSERT_TAIL "TAILQ_HEAD *head" "TYPE *elm" "TAILQ_ENTRY NAME"
! .Fn TAILQ_LAST "TAILQ_HEAD *head"
.Fn TAILQ_NEXT "TYPE *elm" "TAILQ_ENTRY NAME"
.Fn TAILQ_REMOVE "TAILQ_HEAD *head" "TYPE *elm" "TAILQ_ENTRY NAME"
.\"
.Fn CIRCLEQ_ENTRY "TYPE"
.Fn CIRCLEQ_HEAD "HEADNAME" "TYPE"
.Fn CIRCLEQ_INIT "CIRCLEQ_HEAD *head"
.Fn CIRCLEQ_INSERT_AFTER "CIRCLEQ_HEAD *head" "TYPE *listelm" "TYPE *elm" "CIRCLEQ_ENTRY NAME"
.Fn CIRCLEQ_INSERT_BEFORE "CIRCLEQ_HEAD *head" "TYPE *listelm" "TYPE *elm" "CIRCLEQ_ENTRY NAME"
.Fn CIRCLEQ_INSERT_HEAD "CIRCLEQ_HEAD *head" "TYPE *elm" "CIRCLEQ_ENTRY NAME"
.Fn CIRCLEQ_INSERT_TAIL "CIRCLEQ_HEAD *head" "TYPE *elm" "CIRCLEQ_ENTRY NAME"
.Fn CIRCLEQ_REMOVE "CIRCLEQ_HEAD *head" "TYPE *elm" "CIRCLEQ_ENTRY NAME"
.Sh DESCRIPTION
These macros define and operate on five types of data structures:
--- 116,175 ----
.Fn SLIST_REMOVE_HEAD "SLIST_HEAD *head" "SLIST_ENTRY NAME"
.Fn SLIST_REMOVE "SLIST_HEAD *head" "TYPE *elm" "TYPE" "SLIST_ENTRY NAME"
.\"
+ .Fn STAILQ_EMPTY "STAILQ_HEAD *head"
.Fn STAILQ_ENTRY "TYPE"
+ .Fn STAILQ_FIRST "STAILQ_HEAD *head"
+ .Fn STAILQ_FOREACH "TYPE *var" "STAILQ_HEAD *head" "STAILQ_ENTRY NAME"
.Fn STAILQ_HEAD "HEADNAME" "TYPE"
.Fn STAILQ_INIT "STAILQ_HEAD *head"
.Fn STAILQ_INSERT_AFTER "STAILQ_HEAD *head" "TYPE *listelm" "TYPE *elm" "STAILQ_ENTRY NAME"
.Fn STAILQ_INSERT_HEAD "STAILQ_HEAD *head" "TYPE *elm" "STAILQ_ENTRY NAME"
.Fn STAILQ_INSERT_TAIL "STAILQ_HEAD *head" "TYPE *elm" "STAILQ_ENTRY NAME"
+ .Fn STAILQ_LAST "STAILQ_HEAD *head"
+ .Fn STAILQ_NEXT "TYPE *elm" "STAILQ_ENTRY NAME"
.Fn STAILQ_REMOVE_HEAD "STAILQ_HEAD *head" "STAILQ_ENTRY NAME"
.Fn STAILQ_REMOVE "STAILQ_HEAD *head" "TYPE *elm" "TYPE" "STAILQ_ENTRY NAME"
.\"
+ .Fn LIST_EMPTY "LIST_HEAD *head"
.Fn LIST_ENTRY "TYPE"
+ .Fn LIST_FIRST "LIST_HEAD *head"
+ .Fn LIST_FOREACH "TYPE *var" "LIST_HEAD *head" "LIST_ENTRY NAME"
.Fn LIST_HEAD "HEADNAME" "TYPE"
.Fn LIST_INIT "LIST_HEAD *head"
.Fn LIST_INSERT_AFTER "TYPE *listelm" "TYPE *elm" "LIST_ENTRY NAME"
.Fn LIST_INSERT_BEFORE "TYPE *listelm" "TYPE *elm" "LIST_ENTRY NAME"
.Fn LIST_INSERT_HEAD "LIST_HEAD *head" "TYPE *elm" "LIST_ENTRY NAME"
+ .Fn LIST_NEXT "TYPE *elm" "LIST_ENTRY NAME"
.Fn LIST_REMOVE "TYPE *elm" "LIST_ENTRY NAME"
.\"
.Fn TAILQ_EMPTY "TAILQ_HEAD *head"
.Fn TAILQ_ENTRY "TYPE"
.Fn TAILQ_FIRST "TAILQ_HEAD *head"
+ .Fn TAILQ_FOREACH "TYPE *var" "TAILQ_HEAD *head" "TAILQ_ENTRY NAME"
.Fn TAILQ_HEAD "HEADNAME" "TYPE"
.Fn TAILQ_INIT "TAILQ_HEAD *head"
.Fn TAILQ_INSERT_AFTER "TAILQ_HEAD *head" "TYPE *listelm" "TYPE *elm" "TAILQ_ENTRY NAME"
.Fn TAILQ_INSERT_BEFORE "TYPE *listelm" "TYPE *elm" "TAILQ_ENTRY NAME"
.Fn TAILQ_INSERT_HEAD "TAILQ_HEAD *head" "TYPE *elm" "TAILQ_ENTRY NAME"
.Fn TAILQ_INSERT_TAIL "TAILQ_HEAD *head" "TYPE *elm" "TAILQ_ENTRY NAME"
! .Fn TAILQ_LAST "TAILQ_HEAD *head" "HEADNAME"
.Fn TAILQ_NEXT "TYPE *elm" "TAILQ_ENTRY NAME"
+ .Fn TAILQ_PREV "TYPE *elm" "HEADNAME" "TAILQ_ENTRY NAME"
.Fn TAILQ_REMOVE "TAILQ_HEAD *head" "TYPE *elm" "TAILQ_ENTRY NAME"
.\"
+ .Fn CIRCLEQ_EMPTY "CIRCLEQ_HEAD *head"
.Fn CIRCLEQ_ENTRY "TYPE"
+ .Fn CIRCLEQ_FIRST "CIRCLEQ_HEAD *head"
+ .Fn CIRCLEQ_FOREACH "TYPE *var" "CIRCLEQ_HEAD *head" "CIRCLEQ_ENTRY NAME"
.Fn CIRCLEQ_HEAD "HEADNAME" "TYPE"
.Fn CIRCLEQ_INIT "CIRCLEQ_HEAD *head"
.Fn CIRCLEQ_INSERT_AFTER "CIRCLEQ_HEAD *head" "TYPE *listelm" "TYPE *elm" "CIRCLEQ_ENTRY NAME"
.Fn CIRCLEQ_INSERT_BEFORE "CIRCLEQ_HEAD *head" "TYPE *listelm" "TYPE *elm" "CIRCLEQ_ENTRY NAME"
.Fn CIRCLEQ_INSERT_HEAD "CIRCLEQ_HEAD *head" "TYPE *elm" "CIRCLEQ_ENTRY NAME"
.Fn CIRCLEQ_INSERT_TAIL "CIRCLEQ_HEAD *head" "TYPE *elm" "CIRCLEQ_ENTRY NAME"
+ .Fn CIRCLEQ_LAST "CIRCLEQ_HEAD *head"
+ .Fn CIRCLEQ_NEXT "TYPE *elm" "CIRCLEQ_ENTRY NAME"
+ .Fn CIRCLE_PREV "TYPE *elm" "CIRCLEQ_ENTRY NAME"
.Fn CIRCLEQ_REMOVE "CIRCLEQ_HEAD *head" "TYPE *elm" "CIRCLEQ_ENTRY NAME"
.Sh DESCRIPTION
These macros define and operate on five types of data structures:
***************
*** 293,303 ****
--- 329,355 ----
are user selectable.)
.Pp
The macro
+ .Nm SLIST_EMPTY
+ evaluates to true if there are no elements in the list.
+ .Pp
+ The macro
.Nm SLIST_ENTRY
declares a structure that connects the elements in
the list.
.Pp
The macro
+ .Nm SLIST_FIRST
+ returns the first element in the list or NULL if the list is empty.
+ .Pp
+ The macro
+ .Nm SLIST_FOREACH
+ traverses the list referenced by
+ .Fa head
+ in the forward direction, assigning each element in
+ turn to
+ .Fa var .
+ .Pp
+ The macro
.Nm SLIST_INIT
initializes the list referenced by
.Fa head .
***************
*** 316,321 ****
--- 368,377 ----
.Fa listelm .
.Pp
The macro
+ .Nm SLIST_NEXT
+ returns the next element in the list.
+ .Pp
+ The macro
.Nm SLIST_REMOVE_HEAD
removes the element
.Fa elm
***************
*** 352,367 ****
SLIST_REMOVE(&head, n2, entry, entries);/* Deletion. */
free(n2);
! n3 = head.slh_first;
SLIST_REMOVE_HEAD(&head, entries); /* Deletion. */
free(n3);
/* Forward traversal. */
! for (np = head.slh_first; np != NULL; np = np->entries.sle_next)
np-> ...
! while (head.slh_first != NULL) { /* List Deletion. */
! n1 = head.slh_first;
SLIST_REMOVE_HEAD(&head, entries);
free(n1);
}
--- 408,423 ----
SLIST_REMOVE(&head, n2, entry, entries);/* Deletion. */
free(n2);
! n3 = SLIST_FIRST(&head);
SLIST_REMOVE_HEAD(&head, entries); /* Deletion. */
free(n3);
/* Forward traversal. */
! SLIST_FOREACH(np, &head, entries)
np-> ...
! while (!SLIST_EMPTY(&head)) { /* List Deletion. */
! n1 = SLIST_FIRST(&head);
SLIST_REMOVE_HEAD(&head, entries);
free(n1);
}
***************
*** 402,412 ****
--- 458,485 ----
are user selectable.)
.Pp
The macro
+ .Nm STAILQ_EMPTY
+ evaluates to true if there are no items on the tail queue.
+ .Pp
+ The macro
.Nm STAILQ_ENTRY
declares a structure that connects the elements in
the tail queue.
.Pp
The macro
+ .Nm STAILQ_FIRST
+ returns the first item on the tail queue or NULL if the tail queue
+ is empty.
+ .Pp
+ The macro
+ .Nm STAILQ_FOREACH
+ traverses the tail queue referenced by
+ .Fa head
+ in the forward direction, assigning each element
+ in turn to
+ .Fa var .
+ .Pp
+ The macro
.Nm STAILQ_INIT
initializes the tail queue referenced by
.Fa head .
***************
*** 431,436 ****
--- 504,518 ----
.Fa listelm .
.Pp
The macro
+ .Nm STAILQ_LAST
+ returns the last item on the tail queue.
+ If the tail queue is empty the return value is undefined.
+ .Pp
+ The macro
+ .Nm STAILQ_NEXT
+ returns the next item on the tail queue, or NULL this item is the last.
+ .Pp
+ The macro
.Nm STAILQ_REMOVE_HEAD
removes the element
.Fa elm
***************
*** 472,494 ****
free(n2);
/* Deletion from the head */
! n3 = head.stqh_first;
STAILQ_REMOVE_HEAD(&head, entries);
free(n3);
/* Forward traversal. */
! for (np = head.stqh_first; np != NULL; np = np->entries.stqe_next)
np-> ...
/* TailQ Deletion. */
! while (head.stqh_first != NULL) {
! n1 = head.stqh_first;
TAILQ_REMOVE_HEAD(&head, entries);
free(n1);
}
/* Faster TailQ Deletion. */
! n1 = head.stqh_first;
while (n1 != NULL) {
! n2 = n1->entries.stqe_next;
free(n1);
n1 = n2;
}
--- 554,576 ----
free(n2);
/* Deletion from the head */
! n3 = STAILQ_FIRST(&head);
STAILQ_REMOVE_HEAD(&head, entries);
free(n3);
/* Forward traversal. */
! STAILQ_FOREACH(np, &head, entries)
np-> ...
/* TailQ Deletion. */
! while (!STAILQ_EMPTY(&head)) {
! n1 = STAILQ_HEAD(&head);
TAILQ_REMOVE_HEAD(&head, entries);
free(n1);
}
/* Faster TailQ Deletion. */
! n1 = STAILQ_FIRST(&head);
while (n1 != NULL) {
! n2 = STAILQ_NEXT(n1, entries);
free(n1);
n1 = n2;
}
***************
*** 528,538 ****
--- 610,636 ----
are user selectable.)
.Pp
The macro
+ .Nm LIST_EMPTY
+ evaluates to true if their are no elements in the list.
+ .Pp
+ The macro
.Nm LIST_ENTRY
declares a structure that connects the elements in
the list.
.Pp
The macro
+ .Nm LIST_FIRST
+ returns the first element in the list or NULL if the list
+ is empty.
+ .Pp
+ The macro
+ .Nm LIST_FOREACH
+ traverses the list referenced by
+ .Fa head
+ in the forward direction, assigning each element in turn to
+ .Fa var .
+ .Pp
+ The macro
.Nm LIST_INIT
initializes the list referenced by
.Fa head .
***************
*** 558,563 ****
--- 656,665 ----
.Fa listelm .
.Pp
The macro
+ .Nm LIST_NEXT
+ returns the next element in the list, or NULL if this is the last.
+ .Pp
+ The macro
.Nm LIST_REMOVE
removes the element
.Fa elm
***************
*** 587,604 ****
free(n2);
/* Forward traversal. */
! for (np = head.lh_first; np != NULL; np = np->entries.le_next)
np-> ...
! while (head.lh_first != NULL) { /* List Deletion. */
! n1 = head.lh_first;
LIST_REMOVE(n1, entries);
free(n1);
}
! n1 = head.lh_first; /* Faster List Delete. */
while (n1 != NULL) {
! n2 = n1->entries.le_next;
free(n1);
n1 = n2;
}
--- 689,706 ----
free(n2);
/* Forward traversal. */
! LIST_FOREACH(np, &head, entries)
np-> ...
! while (!LIST_EMPTY(&head)) { /* List Deletion. */
! n1 = LIST_FIRST(&head);
LIST_REMOVE(n1, entries);
free(n1);
}
! n1 = LIST_FIRST(&head); /* Faster List Delete. */
while (n1 != NULL) {
! n2 = LIST_NEXT(n1, entries);
free(n1);
n1 = n2;
}
***************
*** 655,660 ****
--- 757,769 ----
is empty.
.Pp
The macro
+ .Nm TAILQ_FOREACH
+ traverses the tail queue referenced by
+ .Fa head
+ in the forward direction, assigning each element in turn to
+ .Fa var .
+ .Pp
+ The macro
.Nm TAILQ_INIT
initializes the tail queue referenced by
.Fa head .
***************
*** 692,698 ****
.Pp
The macro
.Nm TAILQ_NEXT
! returns the next item on the tail queue, or NULL this item is the last.
.Pp
The macro
.Nm TAILQ_REMOVE
--- 801,812 ----
.Pp
The macro
.Nm TAILQ_NEXT
! returns the next item on the tail queue, or NULL if this item is the last.
! .Pp
! The macro
! .Nm TAILQ_PREV
! returns the previous item on the tail queue, or NULL if this item
! is the first.
.Pp
The macro
.Nm TAILQ_REMOVE
***************
*** 726,737 ****
TAILQ_REMOVE(&head, n2, entries); /* Deletion. */
free(n2);
/* Forward traversal. */
! for (np = TAILQ_FIRST(&head); np != NULL; np = TAILQ_NEXT(np, entries))
np-> ...
/* TailQ Deletion. */
while (!TAILQ_EMPTY(head)) {
n1 = TAILQ_FIRST(&head);
! TAILQ_REMOVE(&head, head.tqh_first, entries);
free(n1);
}
/* Faster TailQ Deletion. */
--- 840,851 ----
TAILQ_REMOVE(&head, n2, entries); /* Deletion. */
free(n2);
/* Forward traversal. */
! TAILQ_FOREACH(np, &head, entries)
np-> ...
/* TailQ Deletion. */
while (!TAILQ_EMPTY(head)) {
n1 = TAILQ_FIRST(&head);
! TAILQ_REMOVE(&head, n1, entries);
free(n1);
}
/* Faster TailQ Deletion. */
***************
*** 780,790 ****
--- 894,919 ----
are user selectable.)
.Pp
The macro
+ .Nm CIRCLEQ_EMPTY
+ evaluates to true if there are no items on the circle queue.
+ .Pp
+ The macro
.Nm CIRCLEQ_ENTRY
declares a structure that connects the elements in
the circular queue.
.Pp
The macro
+ .Nm CIRCLEQ_FIRST
+ returns the first item on the circle queue.
+ .Pp
+ The macro
+ .Nm CICRLEQ_FOREACH
+ traverses the circle queue referenced by
+ .Fa head
+ in the forward direction, assigning each element in turn to
+ .Fa var .
+ .Pp
+ The macro
.Nm CIRCLEQ_INIT
initializes the circular queue referenced by
.Fa head .
***************
*** 816,821 ****
--- 945,962 ----
.Fa listelm .
.Pp
The macro
+ .Nm CIRCLEQ_LAST
+ returns the last item on the circle queue.
+ .Pp
+ The macro
+ .Nm CIRCLEQ_NEXT
+ returns the next item on the circle queue.
+ .Pp
+ The macro
+ .Nm CIRCLEQ_PREV
+ returns the previous item on the circle queue.
+ .Pp
+ The macro
.Nm CIRCLEQ_REMOVE
removes the element
.Fa elm
***************
*** 847,867 ****
CIRCLEQ_REMOVE(&head, n1, entries); /* Deletion. */
free(n1);
/* Forward traversal. */
! for (np = head.cqh_first; np != (void *)&head; np = np->entries.cqe_next)
np-> ...
/* Reverse traversal. */
! for (np = head.cqh_last; np != (void *)&head; np = np->entries.cqe_prev)
np-> ...
/* CircleQ Deletion. */
! while (head.cqh_first != (void *)&head) {
! n1 = head.cqh_first;
! CIRCLEQ_REMOVE(&head, head.cqh_first, entries);
free(n1);
}
/* Faster CircleQ Deletion. */
! n1 = head.cqh_first;
while (n1 != (void *)&head) {
! n2 = n1->entries.cqh_next;
free(n1);
n1 = n2;
}
--- 988,1008 ----
CIRCLEQ_REMOVE(&head, n1, entries); /* Deletion. */
free(n1);
/* Forward traversal. */
! CIRCLEQ_FOREACH(np, &head, entries)
np-> ...
/* Reverse traversal. */
! for (np = CIRCLEQ_LAST(&head); np != (void *)&head; np = CIRCLEQ_PREV(np->entries))
np-> ...
/* CircleQ Deletion. */
! while (CIRCLEQ_FIRST(&head) != (void *)&head) {
! n1 = CIRCLEQ_HEAD(&head);
! CIRCLEQ_REMOVE(&head, n1, entries);
free(n1);
}
/* Faster CircleQ Deletion. */
! n1 = CIRCLEQ_FIRST(&head);
while (n1 != (void *)&head) {
! n2 = CIRCLEQ_NEXT(n1, entries);
free(n1);
n1 = n2;
}
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