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Document TAILQ_FOREACH_REVERSE() and CIRCLEQ_FOREACH_REVERSE() macros.

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Submitted by:	Jake Burkholder <jburkhol@home.com>
This commit is contained in:
Archie Cobbs 2000-05-01 18:22:59 +00:00
parent 2be85d6dac
commit 6c1d0fbf06
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=59862
1 changed files with 24 additions and 1 deletions
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25
share/man/man3/queue.3
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@ -75,6 +75,7 @@
.Nm TAILQ_ENTRY ,
.Nm TAILQ_FIRST ,
.Nm TAILQ_FOREACH ,
.Nm TAILQ_FOREACH_REVERSE ,
.Nm TAILQ_HEAD ,
.Nm TAILQ_INIT ,
.Nm TAILQ_INSERT_AFTER ,
@ -89,6 +90,7 @@
.Nm CIRCLEQ_ENTRY ,
.Nm CIRCLEQ_FIRST ,
.Nm CIRCLEQ_FOREACH ,
.Nm CIRCLEQ_FOREACH_REVERSE ,
.Nm CIRCLEQ_HEAD ,
.Nm CIRCLEQ_INIT ,
.Nm CIRCLEQ_INSERT_AFTER ,
@ -146,6 +148,7 @@ lists, tail queues, and circular queues
.Fn TAILQ_ENTRY "TYPE"
.Fn TAILQ_FIRST "TAILQ_HEAD *head"
.Fn TAILQ_FOREACH "TYPE *var" "TAILQ_HEAD *head" "TAILQ_ENTRY NAME"
.Fn TAILQ_FOREACH_REVERSE "TYPE *var" "TAILQ_HEAD *head" "HEADNAME" "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"
@ -161,6 +164,7 @@ lists, tail queues, and circular queues
.Fn CIRCLEQ_ENTRY "TYPE"
.Fn CIRCLEQ_FIRST "CIRCLEQ_HEAD *head"
.Fn CIRCLEQ_FOREACH "TYPE *var" "CIRCLEQ_HEAD *head" "CIRCLEQ_ENTRY NAME"
.Fn CIRCLEQ_FOREACH_REVERSE "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"
@ -239,6 +243,8 @@ Tail queues add the following functionality:
.Bl -enum -compact -offset indent
.It
Entries can be added at the end of a list.
.It
They may be traversed backwards, from tail to head.
.El
However:
.Bl -enum -compact -offset indent
@ -764,6 +770,13 @@ in the forward direction, assigning each element in turn to
.Fa var .
.Pp
The macro
.Nm TAILQ_FOREACH_REVERSE
traverses the tail queue referenced by
.Fa head
in the reverse direction, assigning each element in turn to
.Fa var .
.Pp
The macro
.Nm TAILQ_INIT
initializes the tail queue referenced by
.Fa head .
@ -841,6 +854,9 @@ TAILQ_REMOVE(&head, n2, entries); /* Deletion. */
free(n2);
/* Forward traversal. */
TAILQ_FOREACH(np, &head, entries)
np-> ...
/* Reverse traversal. */
TAILQ_FOREACH_REVERSE(np, &head, tailhead, entries)
np-> ...
/* TailQ Deletion. */
while (!TAILQ_EMPTY(head)) {
@ -914,6 +930,13 @@ in the forward direction, assigning each element in turn to
.Fa var .
.Pp
The macro
.Nm CICRLEQ_FOREACH_REVERSE
traverses the circle queue referenced by
.Fa head
in the reverse direction, assigning each element in turn to
.Fa var .
.Pp
The macro
.Nm CIRCLEQ_INIT
initializes the circular queue referenced by
.Fa head .
@ -991,7 +1014,7 @@ free(n1);
CIRCLEQ_FOREACH(np, &head, entries)
np-> ...
/* Reverse traversal. */
for (np = CIRCLEQ_LAST(&head); np != (void *)&head; np = CIRCLEQ_PREV(np->entries))
CIRCLEQ_FOREACH_REVERSE(np, &head, entries)
np-> ...
/* CircleQ Deletion. */
while (CIRCLEQ_FIRST(&head) != (void *)&head) {