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Update <sys/queue.h> from FreeBSD

Browse Source 
This brings <sys/queue.h> to the most up-to-date version from FreeBSD,
incorporating 18 commits from the past 5 years (2015-02-24 - 2021-01-25):

  $ git log --oneline 9090a24aed70..8d55837dc133 sys/sys/queue.h share/man/man3/queue.3

Only minimal changes compared to the FreeBSD version have been applied
(queue.3 -> queue.3bsd, _LIBBSD_ prefix).

[guillem@hadrons.org: Remove reference to kernel mode in man page. ]

Closes: !12
Signed-off-by: Guillem Jover <guillem@hadrons.org>
This commit is contained in:
Faidon Liambotis 2021-02-07 20:47:00 +02:00 committed by Guillem Jover
parent 25f9b30678
commit 4676026286
12 changed files with 356 additions and 51 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

236
include/bsd/sys/queue.h
View File

@ -1,4 +1,6 @@
/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
@ -10,7 +12,7 @@
* 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.
* 4. Neither the name of the University nor the names of its contributors
* 3. 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.
*
@ -80,17 +82,25 @@
*
* For details on the use of these macros, see the queue(3) manual page.
*
* Below is a summary of implemented functions where:
* + means the macro is available
* - means the macro is not available
* s means the macro is available but is slow (runs in O(n) time)
*
* SLIST LIST STAILQ TAILQ
* _HEAD + + + +
* _CLASS_HEAD + + + +
* _HEAD_INITIALIZER + + + +
* _ENTRY + + + +
* _CLASS_ENTRY + + + +
* _INIT + + + +
* _EMPTY + + + +
* _END + + + +
* _FIRST + + + +
* _NEXT + + + +
* _PREV - + - +
* _LAST - - + +
* _LAST_FAST - - - +
* _FOREACH + + + +
* _FOREACH_FROM + + + +
* _FOREACH_SAFE + + + +
@ -103,14 +113,20 @@
* _INSERT_BEFORE - + - +
* _INSERT_AFTER + + + +
* _INSERT_TAIL - - + +
* _CONCAT - - + +
* _CONCAT s s + +
* _REMOVE_AFTER + - + -
* _REMOVE_HEAD + - + -
* _REMOVE + + + +
* _REMOVE s + s +
* _SWAP + + + +
*
*/
#ifdef QUEUE_MACRO_DEBUG
#warn Use QUEUE_MACRO_DEBUG_TRACE and/or QUEUE_MACRO_DEBUG_TRASH
#define QUEUE_MACRO_DEBUG_TRACE
#define QUEUE_MACRO_DEBUG_TRASH
#endif
#ifdef QUEUE_MACRO_DEBUG_TRACE
/* Store the last 2 places the queue element or head was altered */
struct qm_trace {
unsigned long lastline;
@ -120,9 +136,7 @@ struct qm_trace {
};
#define TRACEBUF struct qm_trace trace;
#define TRACEBUF_INITIALIZER { __FILE__, __LINE__, NULL, 0 } ,
#define TRASHIT(x) do {(x) = (void *)-1;} while (0)
#define QMD_SAVELINK(name, link) void **name = (void *)&(link)
#define TRACEBUF_INITIALIZER { __LINE__, 0, __FILE__, NULL } ,
#define QMD_TRACE_HEAD(head) do { \
(head)->trace.prevline = (head)->trace.lastline; \
@ -138,14 +152,31 @@ struct qm_trace {
(elem)->trace.lastfile = __FILE__; \
} while (0)
#else
#else /* !QUEUE_MACRO_DEBUG_TRACE */
#define QMD_TRACE_ELEM(elem)
#define QMD_TRACE_HEAD(head)
#define QMD_SAVELINK(name, link)
#define TRACEBUF
#define TRACEBUF_INITIALIZER
#endif /* QUEUE_MACRO_DEBUG_TRACE */
#ifdef QUEUE_MACRO_DEBUG_TRASH
#define QMD_SAVELINK(name, link) void **name = (void *)&(link)
#define TRASHIT(x) do {(x) = (void *)-1;} while (0)
#define QMD_IS_TRASHED(x) ((x) == (void *)(intptr_t)-1)
#else /* !QUEUE_MACRO_DEBUG_TRASH */
#define QMD_SAVELINK(name, link)
#define TRASHIT(x)
#endif /* QUEUE_MACRO_DEBUG */
#define QMD_IS_TRASHED(x) 0
#endif /* QUEUE_MACRO_DEBUG_TRASH */
#ifdef __cplusplus
/*
* In C++ there can be structure lists and class lists:
*/
#define QUEUE_TYPEOF(type) type
#else
#define QUEUE_TYPEOF(type) struct type
#endif
/*
* Singly-linked List declarations.
@ -155,6 +186,11 @@ struct name { \
struct type *slh_first; /* first element */ \
}
#define SLIST_CLASS_HEAD(name, type) \
struct name { \
class type *slh_first; /* first element */ \
}
#define SLIST_HEAD_INITIALIZER(head) \
{ NULL }
@ -163,9 +199,37 @@ struct { \
struct type *sle_next; /* next element */ \
}
#define SLIST_CLASS_ENTRY(type) \
struct { \
class type *sle_next; /* next element */ \
}
/*
* Singly-linked List functions.
*/
#if (defined(_KERNEL) && defined(INVARIANTS))
#define QMD_SLIST_CHECK_PREVPTR(prevp, elm) do { \
if (*(prevp) != (elm)) \
panic("Bad prevptr *(%p) == %p != %p", \
(prevp), *(prevp), (elm)); \
} while (0)
#else
#define QMD_SLIST_CHECK_PREVPTR(prevp, elm)
#endif
#define SLIST_CONCAT(head1, head2, type, field) do { \
QUEUE_TYPEOF(type) *curelm = SLIST_FIRST(head1); \
if (curelm == NULL) { \
if ((SLIST_FIRST(head1) = SLIST_FIRST(head2)) != NULL) \
SLIST_INIT(head2); \
} else if (SLIST_FIRST(head2) != NULL) { \
while (SLIST_NEXT(curelm, field) != NULL) \
curelm = SLIST_NEXT(curelm, field); \
SLIST_NEXT(curelm, field) = SLIST_FIRST(head2); \
SLIST_INIT(head2); \
} \
} while (0)
#define SLIST_EMPTY(head) ((head)->slh_first == NULL)
#define SLIST_FIRST(head) ((head)->slh_first)
@ -217,7 +281,7 @@ struct { \
SLIST_REMOVE_HEAD((head), field); \
} \
else { \
struct type *curelm = SLIST_FIRST((head)); \
QUEUE_TYPEOF(type) *curelm = SLIST_FIRST(head); \
while (SLIST_NEXT(curelm, field) != (elm)) \
curelm = SLIST_NEXT(curelm, field); \
SLIST_REMOVE_AFTER(curelm, field); \
@ -234,12 +298,20 @@ struct { \
SLIST_FIRST((head)) = SLIST_NEXT(SLIST_FIRST((head)), field); \
} while (0)
#define SLIST_REMOVE_PREVPTR(prevp, elm, field) do { \
QMD_SLIST_CHECK_PREVPTR(prevp, elm); \
*(prevp) = SLIST_NEXT(elm, field); \
TRASHIT((elm)->field.sle_next); \
} while (0)
#define SLIST_SWAP(head1, head2, type) do { \
struct type *swap_first = SLIST_FIRST(head1); \
QUEUE_TYPEOF(type) *swap_first = SLIST_FIRST(head1); \
SLIST_FIRST(head1) = SLIST_FIRST(head2); \
SLIST_FIRST(head2) = swap_first; \
} while (0)
#define SLIST_END(head) NULL
/*
* Singly-linked Tail queue declarations.
*/
@ -249,6 +321,12 @@ struct name { \
struct type **stqh_last;/* addr of last next element */ \
}
#define STAILQ_CLASS_HEAD(name, type) \
struct name { \
class type *stqh_first; /* first element */ \
class type **stqh_last; /* addr of last next element */ \
}
#define STAILQ_HEAD_INITIALIZER(head) \
{ NULL, &(head).stqh_first }
@ -257,6 +335,11 @@ struct { \
struct type *stqe_next; /* next element */ \
}
#define STAILQ_CLASS_ENTRY(type) \
struct { \
class type *stqe_next; /* next element */ \
}
/*
* Singly-linked Tail queue functions.
*/
@ -315,9 +398,10 @@ struct { \
(head)->stqh_last = &STAILQ_NEXT((elm), field); \
} while (0)
#define STAILQ_LAST(head, type, field) \
(STAILQ_EMPTY((head)) ? NULL : \
__containerof((head)->stqh_last, struct type, field.stqe_next))
#define STAILQ_LAST(head, type, field) \
(STAILQ_EMPTY((head)) ? NULL : \
__containerof((head)->stqh_last, \
QUEUE_TYPEOF(type), field.stqe_next))
#define STAILQ_NEXT(elm, field) ((elm)->field.stqe_next)
@ -327,7 +411,7 @@ struct { \
STAILQ_REMOVE_HEAD((head), field); \
} \
else { \
struct type *curelm = STAILQ_FIRST((head)); \
QUEUE_TYPEOF(type) *curelm = STAILQ_FIRST(head); \
while (STAILQ_NEXT(curelm, field) != (elm)) \
curelm = STAILQ_NEXT(curelm, field); \
STAILQ_REMOVE_AFTER(head, curelm, field); \
@ -348,8 +432,8 @@ struct { \
} while (0)
#define STAILQ_SWAP(head1, head2, type) do { \
struct type *swap_first = STAILQ_FIRST(head1); \
struct type **swap_last = (head1)->stqh_last; \
QUEUE_TYPEOF(type) *swap_first = STAILQ_FIRST(head1); \
QUEUE_TYPEOF(type) **swap_last = (head1)->stqh_last; \
STAILQ_FIRST(head1) = STAILQ_FIRST(head2); \
(head1)->stqh_last = (head2)->stqh_last; \
STAILQ_FIRST(head2) = swap_first; \
@ -360,6 +444,8 @@ struct { \
(head2)->stqh_last = &STAILQ_FIRST(head2); \
} while (0)
#define STAILQ_END(head) NULL
/*
* List declarations.
@ -369,6 +455,11 @@ struct name { \
struct type *lh_first; /* first element */ \
}
#define LIST_CLASS_HEAD(name, type) \
struct name { \
class type *lh_first; /* first element */ \
}
#define LIST_HEAD_INITIALIZER(head) \
{ NULL }
@ -378,11 +469,23 @@ struct { \
struct type **le_prev; /* address of previous next element */ \
}
#define LIST_CLASS_ENTRY(type) \
struct { \
class type *le_next; /* next element */ \
class type **le_prev; /* address of previous next element */ \
}
/*
* List functions.
*/
#if (defined(_KERNEL) && defined(INVARIANTS))
/*
* QMD_LIST_CHECK_HEAD(LIST_HEAD *head, LIST_ENTRY NAME)
*
* If the list is non-empty, validates that the first element of the list
* points back at 'head.'
*/
#define QMD_LIST_CHECK_HEAD(head, field) do { \
if (LIST_FIRST((head)) != NULL && \
LIST_FIRST((head))->field.le_prev != \
@ -390,6 +493,12 @@ struct { \
panic("Bad list head %p first->prev != head", (head)); \
} while (0)
/*
* QMD_LIST_CHECK_NEXT(TYPE *elm, LIST_ENTRY NAME)
*
* If an element follows 'elm' in the list, validates that the next element
* points back at 'elm.'
*/
#define QMD_LIST_CHECK_NEXT(elm, field) do { \
if (LIST_NEXT((elm), field) != NULL && \
LIST_NEXT((elm), field)->field.le_prev != \
@ -397,6 +506,11 @@ struct { \
panic("Bad link elm %p next->prev != elm", (elm)); \
} while (0)
/*
* QMD_LIST_CHECK_PREV(TYPE *elm, LIST_ENTRY NAME)
*
* Validates that the previous element (or head of the list) points to 'elm.'
*/
#define QMD_LIST_CHECK_PREV(elm, field) do { \
if (*(elm)->field.le_prev != (elm)) \
panic("Bad link elm %p prev->next != elm", (elm)); \
@ -407,6 +521,23 @@ struct { \
#define QMD_LIST_CHECK_PREV(elm, field)
#endif /* (_KERNEL && INVARIANTS) */
#define LIST_CONCAT(head1, head2, type, field) do { \
QUEUE_TYPEOF(type) *curelm = LIST_FIRST(head1); \
if (curelm == NULL) { \
if ((LIST_FIRST(head1) = LIST_FIRST(head2)) != NULL) { \
LIST_FIRST(head2)->field.le_prev = \
&LIST_FIRST((head1)); \
LIST_INIT(head2); \
} \
} else if (LIST_FIRST(head2) != NULL) { \
while (LIST_NEXT(curelm, field) != NULL) \
curelm = LIST_NEXT(curelm, field); \
LIST_NEXT(curelm, field) = LIST_FIRST(head2); \
LIST_FIRST(head2)->field.le_prev = &LIST_NEXT(curelm, field); \
LIST_INIT(head2); \
} \
} while (0)
#define LIST_EMPTY(head) ((head)->lh_first == NULL)
#define LIST_FIRST(head) ((head)->lh_first)
@ -462,9 +593,10 @@ struct { \
#define LIST_NEXT(elm, field) ((elm)->field.le_next)
#define LIST_PREV(elm, head, type, field) \
((elm)->field.le_prev == &LIST_FIRST((head)) ? NULL : \
__containerof((elm)->field.le_prev, struct type, field.le_next))
#define LIST_PREV(elm, head, type, field) \
((elm)->field.le_prev == &LIST_FIRST((head)) ? NULL : \
__containerof((elm)->field.le_prev, \
QUEUE_TYPEOF(type), field.le_next))
#define LIST_REMOVE(elm, field) do { \
QMD_SAVELINK(oldnext, (elm)->field.le_next); \
@ -480,7 +612,7 @@ struct { \
} while (0)
#define LIST_SWAP(head1, head2, type, field) do { \
struct type *swap_tmp = LIST_FIRST((head1)); \
QUEUE_TYPEOF(type) *swap_tmp = LIST_FIRST(head1); \
LIST_FIRST((head1)) = LIST_FIRST((head2)); \
LIST_FIRST((head2)) = swap_tmp; \
if ((swap_tmp = LIST_FIRST((head1))) != NULL) \
@ -489,6 +621,8 @@ struct { \
swap_tmp->field.le_prev = &LIST_FIRST((head2)); \
} while (0)
#define LIST_END(head) NULL
/*
* Tail queue declarations.
*/
@ -499,6 +633,13 @@ struct name { \
TRACEBUF \
}
#define TAILQ_CLASS_HEAD(name, type) \
struct name { \
class type *tqh_first; /* first element */ \
class type **tqh_last; /* addr of last next element */ \
TRACEBUF \
}
#define TAILQ_HEAD_INITIALIZER(head) \
{ NULL, &(head).tqh_first, TRACEBUF_INITIALIZER }
@ -509,10 +650,23 @@ struct { \
TRACEBUF \
}
#define TAILQ_CLASS_ENTRY(type) \
struct { \
class type *tqe_next; /* next element */ \
class type **tqe_prev; /* address of previous next element */ \
TRACEBUF \
}
/*
* Tail queue functions.
*/
#if (defined(_KERNEL) && defined(INVARIANTS))
/*
* QMD_TAILQ_CHECK_HEAD(TAILQ_HEAD *head, TAILQ_ENTRY NAME)
*
* If the tailq is non-empty, validates that the first element of the tailq
* points back at 'head.'
*/
#define QMD_TAILQ_CHECK_HEAD(head, field) do { \
if (!TAILQ_EMPTY(head) && \
TAILQ_FIRST((head))->field.tqe_prev != \
@ -520,11 +674,22 @@ struct { \
panic("Bad tailq head %p first->prev != head", (head)); \
} while (0)
/*
* QMD_TAILQ_CHECK_TAIL(TAILQ_HEAD *head, TAILQ_ENTRY NAME)
*
* Validates that the tail of the tailq is a pointer to pointer to NULL.
*/
#define QMD_TAILQ_CHECK_TAIL(head, field) do { \
if (*(head)->tqh_last != NULL) \
panic("Bad tailq NEXT(%p->tqh_last) != NULL", (head)); \
} while (0)
/*
* QMD_TAILQ_CHECK_NEXT(TYPE *elm, TAILQ_ENTRY NAME)
*
* If an element follows 'elm' in the tailq, validates that the next element
* points back at 'elm.'
*/
#define QMD_TAILQ_CHECK_NEXT(elm, field) do { \
if (TAILQ_NEXT((elm), field) != NULL && \
TAILQ_NEXT((elm), field)->field.tqe_prev != \
@ -532,6 +697,11 @@ struct { \
panic("Bad link elm %p next->prev != elm", (elm)); \
} while (0)
/*
* QMD_TAILQ_CHECK_PREV(TYPE *elm, TAILQ_ENTRY NAME)
*
* Validates that the previous element (or head of the tailq) points to 'elm.'
*/
#define QMD_TAILQ_CHECK_PREV(elm, field) do { \
if (*(elm)->field.tqe_prev != (elm)) \
panic("Bad link elm %p prev->next != elm", (elm)); \
@ -616,7 +786,7 @@ struct { \
TAILQ_NEXT((listelm), field) = (elm); \
(elm)->field.tqe_prev = &TAILQ_NEXT((listelm), field); \
QMD_TRACE_ELEM(&(elm)->field); \
QMD_TRACE_ELEM(&listelm->field); \
QMD_TRACE_ELEM(&(listelm)->field); \
} while (0)
#define TAILQ_INSERT_BEFORE(listelm, elm, field) do { \
@ -626,7 +796,7 @@ struct { \
*(listelm)->field.tqe_prev = (elm); \
(listelm)->field.tqe_prev = &TAILQ_NEXT((elm), field); \
QMD_TRACE_ELEM(&(elm)->field); \
QMD_TRACE_ELEM(&listelm->field); \
QMD_TRACE_ELEM(&(listelm)->field); \
} while (0)
#define TAILQ_INSERT_HEAD(head, elm, field) do { \
@ -655,11 +825,25 @@ struct { \
#define TAILQ_LAST(head, headname) \
(*(((struct headname *)((head)->tqh_last))->tqh_last))
/*
* The FAST function is fast in that it causes no data access other
* then the access to the head. The standard LAST function above
* will cause a data access of both the element you want and
* the previous element. FAST is very useful for instances when
* you may want to prefetch the last data element.
*/
#define TAILQ_LAST_FAST(head, type, field) \
(TAILQ_EMPTY(head) ? NULL : __containerof((head)->tqh_last, QUEUE_TYPEOF(type), field.tqe_next))
#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_PREV_FAST(elm, head, type, field) \
((elm)->field.tqe_prev == &(head)->tqh_first ? NULL : \
__containerof((elm)->field.tqe_prev, QUEUE_TYPEOF(type), field.tqe_next))
#define TAILQ_REMOVE(head, elm, field) do { \
QMD_SAVELINK(oldnext, (elm)->field.tqe_next); \
QMD_SAVELINK(oldprev, (elm)->field.tqe_prev); \
@ -679,8 +863,8 @@ struct { \
} while (0)
#define TAILQ_SWAP(head1, head2, type, field) do { \
struct type *swap_first = (head1)->tqh_first; \
struct type **swap_last = (head1)->tqh_last; \
QUEUE_TYPEOF(type) *swap_first = (head1)->tqh_first; \
QUEUE_TYPEOF(type) **swap_last = (head1)->tqh_last; \
(head1)->tqh_first = (head2)->tqh_first; \
(head1)->tqh_last = (head2)->tqh_last; \
(head2)->tqh_first = swap_first; \
@ -695,4 +879,6 @@ struct { \
(head2)->tqh_last = &(head2)->tqh_first; \
} while (0)
#define TAILQ_END(head) NULL
#endif /* !LIBBSD_SYS_QUEUE_H */

1
man/LIST_CLASS_ENTRY.3bsd Normal file
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@ -0,0 +1 @@
.so man3/queue.3bsd

1
man/LIST_CLASS_HEAD.3bsd Normal file
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@ -0,0 +1 @@
.so man3/queue.3bsd

9
man/Makefile.am
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@ -14,6 +14,8 @@ md5.3bsd: $(srcdir)/mdX.3bsd
$(AM_V_GEN) sed $(SED_MD5_SUBST) $< > $@
dist_man_MANS = \
LIST_CLASS_ENTRY.3bsd \
LIST_CLASS_HEAD.3bsd \
LIST_EMPTY.3bsd \
LIST_ENTRY.3bsd \
LIST_FIRST.3bsd \
@ -54,6 +56,8 @@ dist_man_MANS = \
RB_REMOVE.3bsd \
RB_RIGHT.3bsd \
RB_ROOT.3bsd \
SLIST_CLASS_ENTRY.3bsd \
SLIST_CLASS_HEAD.3bsd \
SLIST_EMPTY.3bsd \
SLIST_ENTRY.3bsd \
SLIST_FIRST.3bsd \
@ -70,6 +74,7 @@ dist_man_MANS = \
SLIST_REMOVE.3bsd \
SLIST_REMOVE_AFTER.3bsd \
SLIST_REMOVE_HEAD.3bsd \
SLIST_REMOVE_PREVPTR.3bsd \
SLIST_SWAP.3bsd \
SPLAY_EMPTY.3bsd \
SPLAY_ENTRY.3bsd \
@ -88,6 +93,8 @@ dist_man_MANS = \
SPLAY_REMOVE.3bsd \
SPLAY_RIGHT.3bsd \
SPLAY_ROOT.3bsd \
STAILQ_CLASS_ENTRY.3bsd \
STAILQ_CLASS_HEAD.3bsd \
STAILQ_CONCAT.3bsd \
STAILQ_EMPTY.3bsd \
STAILQ_ENTRY.3bsd \
@ -108,6 +115,8 @@ dist_man_MANS = \
STAILQ_REMOVE_AFTER.3bsd \
STAILQ_REMOVE_HEAD.3bsd \
STAILQ_SWAP.3bsd \
TAILQ_CLASS_ENTRY.3bsd \
TAILQ_CLASS_HEAD.3bsd \
TAILQ_CONCAT.3bsd \
TAILQ_EMPTY.3bsd \
TAILQ_ENTRY.3bsd \

1
man/SLIST_CLASS_ENTRY.3bsd Normal file
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@ -0,0 +1 @@
.so man3/queue.3bsd

1
man/SLIST_CLASS_HEAD.3bsd Normal file
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@ -0,0 +1 @@
.so man3/queue.3bsd

1
man/SLIST_REMOVE_PREVPTR.3bsd Normal file
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@ -0,0 +1 @@
.so man3/queue.3bsd

1
man/STAILQ_CLASS_ENTRY.3bsd Normal file
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@ -0,0 +1 @@
.so man3/queue.3bsd

1
man/STAILQ_CLASS_HEAD.3bsd Normal file
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@ -0,0 +1 @@
.so man3/queue.3bsd

1
man/TAILQ_CLASS_ENTRY.3bsd Normal file
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@ -0,0 +1 @@
.so man3/queue.3bsd

1
man/TAILQ_CLASS_HEAD.3bsd Normal file
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@ -0,0 +1 @@
.so man3/queue.3bsd

153
man/queue.3bsd
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@ -28,35 +28,40 @@
.\" @(#)queue.3 8.2 (Berkeley) 1/24/94
.\" $FreeBSD$
.\"
.Dd June 17, 2013
.Dd September 8, 2016
.Dt QUEUE 3bsd
.Os
.Sh NAME
.Nm SLIST_CLASS_ENTRY ,
.Nm SLIST_CLASS_HEAD ,
.Nm SLIST_CONCAT ,
.Nm SLIST_EMPTY ,
.Nm SLIST_ENTRY ,
.Nm SLIST_FIRST ,
.Nm SLIST_FOREACH ,
.Nm SLIST_FOREACH_FROM ,
.Nm SLIST_FOREACH_SAFE ,
.Nm SLIST_FOREACH_FROM_SAFE ,
.Nm SLIST_FOREACH_SAFE ,
.Nm SLIST_HEAD ,
.Nm SLIST_HEAD_INITIALIZER ,
.Nm SLIST_INIT ,
.Nm SLIST_INSERT_AFTER ,
.Nm SLIST_INSERT_HEAD ,
.Nm SLIST_NEXT ,
.Nm SLIST_REMOVE ,
.Nm SLIST_REMOVE_AFTER ,
.Nm SLIST_REMOVE_HEAD ,
.Nm SLIST_REMOVE ,
.Nm SLIST_SWAP ,
.Nm STAILQ_CLASS_ENTRY ,
.Nm STAILQ_CLASS_HEAD ,
.Nm STAILQ_CONCAT ,
.Nm STAILQ_EMPTY ,
.Nm STAILQ_ENTRY ,
.Nm STAILQ_FIRST ,
.Nm STAILQ_FOREACH ,
.Nm STAILQ_FOREACH_FROM ,
.Nm STAILQ_FOREACH_SAFE ,
.Nm STAILQ_FOREACH_FROM_SAFE ,
.Nm STAILQ_FOREACH_SAFE ,
.Nm STAILQ_HEAD ,
.Nm STAILQ_HEAD_INITIALIZER ,
.Nm STAILQ_INIT ,
@ -65,17 +70,20 @@
.Nm STAILQ_INSERT_TAIL ,
.Nm STAILQ_LAST ,
.Nm STAILQ_NEXT ,
.Nm STAILQ_REMOVE ,
.Nm STAILQ_REMOVE_AFTER ,
.Nm STAILQ_REMOVE_HEAD ,
.Nm STAILQ_REMOVE ,
.Nm STAILQ_SWAP ,
.Nm LIST_CLASS_ENTRY ,
.Nm LIST_CLASS_HEAD ,
.Nm LIST_CONCAT ,
.Nm LIST_EMPTY ,
.Nm LIST_ENTRY ,
.Nm LIST_FIRST ,
.Nm LIST_FOREACH ,
.Nm LIST_FOREACH_FROM ,
.Nm LIST_FOREACH_SAFE ,
.Nm LIST_FOREACH_FROM_SAFE ,
.Nm LIST_FOREACH_SAFE ,
.Nm LIST_HEAD ,
.Nm LIST_HEAD_INITIALIZER ,
.Nm LIST_INIT ,
@ -86,18 +94,20 @@
.Nm LIST_PREV ,
.Nm LIST_REMOVE ,
.Nm LIST_SWAP ,
.Nm TAILQ_CLASS_ENTRY ,
.Nm TAILQ_CLASS_HEAD ,
.Nm TAILQ_CONCAT ,
.Nm TAILQ_EMPTY ,
.Nm TAILQ_ENTRY ,
.Nm TAILQ_FIRST ,
.Nm TAILQ_FOREACH ,
.Nm TAILQ_FOREACH_FROM ,
.Nm TAILQ_FOREACH_SAFE ,
.Nm TAILQ_FOREACH_FROM_SAFE ,
.Nm TAILQ_FOREACH_REVERSE ,
.Nm TAILQ_FOREACH_REVERSE_FROM ,
.Nm TAILQ_FOREACH_REVERSE_SAFE ,
.Nm TAILQ_FOREACH_REVERSE_FROM_SAFE ,
.Nm TAILQ_FOREACH_REVERSE_SAFE ,
.Nm TAILQ_FOREACH_SAFE ,
.Nm TAILQ_HEAD ,
.Nm TAILQ_HEAD_INITIALIZER ,
.Nm TAILQ_INIT ,
@ -122,52 +132,60 @@ lists and tail queues
.Xr libbsd 7
for include usage.)
.\"
.Fn SLIST_CLASS_ENTRY "CLASSTYPE"
.Fn SLIST_CLASS_HEAD "HEADNAME" "CLASSTYPE"
.Fn SLIST_CONCAT "SLIST_HEAD *head1" "SLIST_HEAD *head2" "TYPE" "SLIST_ENTRY NAME"
.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_FOREACH_FROM "TYPE *var" "SLIST_HEAD *head" "SLIST_ENTRY NAME"
.Fn SLIST_FOREACH_SAFE "TYPE *var" "SLIST_HEAD *head" "SLIST_ENTRY NAME" "TYPE *temp_var"
.Fn SLIST_FOREACH_FROM_SAFE "TYPE *var" "SLIST_HEAD *head" "SLIST_ENTRY NAME" "TYPE *temp_var"
.Fn SLIST_FOREACH_SAFE "TYPE *var" "SLIST_HEAD *head" "SLIST_ENTRY NAME" "TYPE *temp_var"
.Fn SLIST_HEAD "HEADNAME" "TYPE"
.Fn SLIST_HEAD_INITIALIZER "SLIST_HEAD head"
.Fn SLIST_INIT "SLIST_HEAD *head"
.Fn SLIST_INSERT_AFTER "TYPE *listelm" "TYPE *elm" "SLIST_ENTRY NAME"
.Fn SLIST_INSERT_HEAD "SLIST_HEAD *head" "TYPE *elm" "SLIST_ENTRY NAME"
.Fn SLIST_NEXT "TYPE *elm" "SLIST_ENTRY NAME"
.Fn SLIST_REMOVE "SLIST_HEAD *head" "TYPE *elm" "TYPE" "SLIST_ENTRY NAME"
.Fn SLIST_REMOVE_AFTER "TYPE *elm" "SLIST_ENTRY NAME"
.Fn SLIST_REMOVE_HEAD "SLIST_HEAD *head" "SLIST_ENTRY NAME"
.Fn SLIST_REMOVE "SLIST_HEAD *head" "TYPE *elm" "TYPE" "SLIST_ENTRY NAME"
.Fn SLIST_SWAP "SLIST_HEAD *head1" "SLIST_HEAD *head2" "SLIST_ENTRY NAME"
.Fn SLIST_SWAP "SLIST_HEAD *head1" "SLIST_HEAD *head2" "TYPE"
.\"
.Fn STAILQ_CLASS_ENTRY "CLASSTYPE"
.Fn STAILQ_CLASS_HEAD "HEADNAME" "CLASSTYPE"
.Fn STAILQ_CONCAT "STAILQ_HEAD *head1" "STAILQ_HEAD *head2"
.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_FOREACH_FROM "TYPE *var" "STAILQ_HEAD *head" "STAILQ_ENTRY NAME"
.Fn STAILQ_FOREACH_SAFE "TYPE *var" "STAILQ_HEAD *head" "STAILQ_ENTRY NAME" "TYPE *temp_var"
.Fn STAILQ_FOREACH_FROM_SAFE "TYPE *var" "STAILQ_HEAD *head" "STAILQ_ENTRY NAME" "TYPE *temp_var"
.Fn STAILQ_FOREACH_SAFE "TYPE *var" "STAILQ_HEAD *head" "STAILQ_ENTRY NAME" "TYPE *temp_var"
.Fn STAILQ_HEAD "HEADNAME" "TYPE"
.Fn STAILQ_HEAD_INITIALIZER "STAILQ_HEAD head"
.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" "TYPE" "STAILQ_ENTRY NAME"
.Fn STAILQ_LAST "STAILQ_HEAD *head" "TYPE *elm" "STAILQ_ENTRY NAME"
.Fn STAILQ_NEXT "TYPE *elm" "STAILQ_ENTRY NAME"
.Fn STAILQ_REMOVE "STAILQ_HEAD *head" "TYPE *elm" "TYPE" "STAILQ_ENTRY NAME"
.Fn STAILQ_REMOVE_AFTER "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 STAILQ_SWAP "STAILQ_HEAD *head1" "STAILQ_HEAD *head2" "STAILQ_ENTRY NAME"
.Fn STAILQ_SWAP "STAILQ_HEAD *head1" "STAILQ_HEAD *head2" "TYPE"
.\"
.Fn LIST_CLASS_ENTRY "CLASSTYPE"
.Fn LIST_CLASS_HEAD "HEADNAME" "CLASSTYPE"
.Fn LIST_CONCAT "LIST_HEAD *head1" "LIST_HEAD *head2" "TYPE" "LIST_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_FOREACH_FROM "TYPE *var" "LIST_HEAD *head" "LIST_ENTRY NAME"
.Fn LIST_FOREACH_SAFE "TYPE *var" "LIST_HEAD *head" "LIST_ENTRY NAME" "TYPE *temp_var"
.Fn LIST_FOREACH_FROM_SAFE "TYPE *var" "LIST_HEAD *head" "LIST_ENTRY NAME" "TYPE *temp_var"
.Fn LIST_FOREACH_SAFE "TYPE *var" "LIST_HEAD *head" "LIST_ENTRY NAME" "TYPE *temp_var"
.Fn LIST_HEAD "HEADNAME" "TYPE"
.Fn LIST_HEAD_INITIALIZER "LIST_HEAD head"
.Fn LIST_INIT "LIST_HEAD *head"
@ -179,18 +197,20 @@ for include usage.)
.Fn LIST_REMOVE "TYPE *elm" "LIST_ENTRY NAME"
.Fn LIST_SWAP "LIST_HEAD *head1" "LIST_HEAD *head2" "TYPE" "LIST_ENTRY NAME"
.\"
.Fn TAILQ_CLASS_ENTRY "CLASSTYPE"
.Fn TAILQ_CLASS_HEAD "HEADNAME" "CLASSTYPE"
.Fn TAILQ_CONCAT "TAILQ_HEAD *head1" "TAILQ_HEAD *head2" "TAILQ_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_FOREACH_FROM "TYPE *var" "TAILQ_HEAD *head" "TAILQ_ENTRY NAME"
.Fn TAILQ_FOREACH_SAFE "TYPE *var" "TAILQ_HEAD *head" "TAILQ_ENTRY NAME" "TYPE *temp_var"
.Fn TAILQ_FOREACH_FROM_SAFE "TYPE *var" "TAILQ_HEAD *head" "TAILQ_ENTRY NAME" "TYPE *temp_var"
.Fn TAILQ_FOREACH_REVERSE "TYPE *var" "TAILQ_HEAD *head" "HEADNAME" "TAILQ_ENTRY NAME"
.Fn TAILQ_FOREACH_REVERSE_FROM "TYPE *var" "TAILQ_HEAD *head" "HEADNAME" "TAILQ_ENTRY NAME"
.Fn TAILQ_FOREACH_REVERSE_SAFE "TYPE *var" "TAILQ_HEAD *head" "HEADNAME" "TAILQ_ENTRY NAME" "TYPE *temp_var"
.Fn TAILQ_FOREACH_REVERSE_FROM_SAFE "TYPE *var" "TAILQ_HEAD *head" "HEADNAME" "TAILQ_ENTRY NAME" "TYPE *temp_var"
.Fn TAILQ_FOREACH_REVERSE_SAFE "TYPE *var" "TAILQ_HEAD *head" "HEADNAME" "TAILQ_ENTRY NAME" "TYPE *temp_var"
.Fn TAILQ_FOREACH_SAFE "TYPE *var" "TAILQ_HEAD *head" "TAILQ_ENTRY NAME" "TYPE *temp_var"
.Fn TAILQ_HEAD "HEADNAME" "TYPE"
.Fn TAILQ_HEAD_INITIALIZER "TAILQ_HEAD head"
.Fn TAILQ_INIT "TAILQ_HEAD *head"
@ -205,8 +225,18 @@ for include usage.)
.Fn TAILQ_SWAP "TAILQ_HEAD *head1" "TAILQ_HEAD *head2" "TYPE" "TAILQ_ENTRY NAME"
.\"
.Sh DESCRIPTION
These macros define and operate on four types of data structures:
singly-linked lists, singly-linked tail queues, lists, and tail queues.
These macros define and operate on four types of data structures which
can be used in both C and C++ source code:
.Bl -enum -compact -offset indent
.It
Lists
.It
Singly-linked lists
.It
Singly-linked tail queues
.It
Tail queues
.El
All four structures support the following functionality:
.Bl -enum -compact -offset indent
.It
@ -230,6 +260,8 @@ Singly-linked lists add the following functionality:
.Bl -enum -compact -offset indent
.It
O(n) removal of any entry in the list.
.It
O(n) concatenation of two lists.
.El
.Pp
Singly-linked tail queues add the following functionality:
@ -277,6 +309,8 @@ Linked lists are the simplest of the doubly linked data structures.
They add the following functionality over the above:
.Bl -enum -compact -offset indent
.It
O(n) concatenation of two lists.
.It
They may be traversed backwards.
.El
However:
@ -308,24 +342,39 @@ than singly-linked lists.
.Pp
In the macro definitions,
.Fa TYPE
is the name of a user defined structure,
that must contain a field of type
is the name of a user defined structure.
The structure must contain a field called
.Fa NAME
which is of type
.Li SLIST_ENTRY ,
.Li STAILQ_ENTRY ,
.Li LIST_ENTRY ,
or
.Li TAILQ_ENTRY ,
named
.Fa NAME .
.Li TAILQ_ENTRY .
In the macro definitions,
.Fa CLASSTYPE
is the name of a user defined class.
The class must contain a field called
.Fa NAME
which is of type
.Li SLIST_CLASS_ENTRY ,
.Li STAILQ_CLASS_ENTRY ,
.Li LIST_CLASS_ENTRY ,
or
.Li TAILQ_CLASS_ENTRY .
The argument
.Fa HEADNAME
is the name of a user defined structure that must be declared
using the macros
.Li SLIST_HEAD ,
.Li SLIST_CLASS_HEAD ,
.Li STAILQ_HEAD ,
.Li STAILQ_CLASS_HEAD ,
.Li LIST_HEAD ,
.Li LIST_CLASS_HEAD ,
.Li TAILQ_HEAD ,
or
.Li TAILQ_HEAD .
.Li TAILQ_CLASS_HEAD .
See the examples below for further explanation of how these
macros are used.
.Sh SINGLY-LINKED LISTS
@ -367,6 +416,19 @@ evaluates to an initializer for the list
.Fa head .
.Pp
The macro
.Nm SLIST_CONCAT
concatenates the list headed by
.Fa head2
onto the end of the one headed by
.Fa head1
removing all entries from the former.
Use of this macro should be avoided as it traverses the entirety of the
.Fa head1
list.
A singly-linked tail queue should be used if this macro is needed in
high-usage code paths or to operate on long lists.
.Pp
The macro
.Nm SLIST_EMPTY
evaluates to true if there are no elements in the list.
.Pp
@ -474,6 +536,9 @@ The macro
removes the element
.Fa elm
from the list.
Use of this macro should be avoided as it traverses the entire list.
A doubly-linked list should be used if this macro is needed in
high-usage code paths or to operate on long lists.
.Pp
The macro
.Nm SLIST_SWAP
@ -690,6 +755,9 @@ The macro
removes the element
.Fa elm
from the tail queue.
Use of this macro should be avoided as it traverses the entire list.
A doubly-linked tail queue should be used if this macro is needed in
high-usage code paths or to operate on long tail queues.
.Pp
The macro
.Nm STAILQ_SWAP
@ -789,6 +857,19 @@ evaluates to an initializer for the list
.Fa head .
.Pp
The macro
.Nm LIST_CONCAT
concatenates the list headed by
.Fa head2
onto the end of the one headed by
.Fa head1
removing all entries from the former.
Use of this macro should be avoided as it traverses the entirety of the
.Fa head1
list.
A tail queue should be used if this macro is needed in
high-usage code paths or to operate on long lists.
.Pp
The macro
.Nm LIST_EMPTY
evaluates to true if there are no elements in the list.
.Pp
@ -1210,6 +1291,26 @@ while (n1 != NULL) {
}
TAILQ_INIT(&head);
.Ed
.Sh DIAGNOSTICS
When debugging
.Nm queue(3) ,
it can be useful to trace queue changes.
To enable tracing, define the macro
.Va QUEUE_MACRO_DEBUG_TRACE
at compile time.
.Pp
It can also be useful to trash pointers that have been unlinked from a queue,
to detect use after removal.
To enable pointer trashing, define the macro
.Va QUEUE_MACRO_DEBUG_TRASH
at compile time.
The macro
.Fn QMD_IS_TRASHED "void *ptr"
returns true if
.Fa ptr
has been trashed by the
.Va QUEUE_MACRO_DEBUG_TRASH
option.
.Sh SEE ALSO
.Xr tree 3bsd
.Sh HISTORY