/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* Copyright (C) 2011 Intel Corporation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 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
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)queue.h 8.5 (Berkeley) 8/20/94
* $FreeBSD$
*/
#ifndef _COGL_QUEUE_H_
#define _COGL_QUEUE_H_
/*
* This file defines four types of data structures: singly-linked lists,
* singly-linked tail queues, lists and tail queues.
*
* A singly-linked list is headed by a single forward pointer. The elements
* are singly linked for minimum space and pointer manipulation overhead at
* the expense of O(n) removal for arbitrary elements. New elements can be
* added to the list after an existing element or at the head of the list.
* Elements being removed from the head of the list should use the explicit
* macro for this purpose for optimum efficiency. A singly-linked list may
* only be traversed in the forward direction. Singly-linked lists are ideal
* for applications with large datasets and few or no removals or for
* implementing a LIFO queue.
*
* A singly-linked tail queue is headed by a pair of pointers, one to the
* head of the list and the other to the tail of the list. The elements are
* singly linked for minimum space and pointer manipulation overhead at the
* expense of O(n) removal for arbitrary elements. New elements can be added
* to the list after an existing element, at the head of the list, or at the
* end of the list. Elements being removed from the head of the tail queue
* should use the explicit macro for this purpose for optimum efficiency.
* A singly-linked tail queue may only be traversed in the forward direction.
* Singly-linked tail queues are ideal for applications with large datasets
* and few or no removals or for implementing a FIFO queue.
*
* A list is headed by a single forward pointer (or an array of forward
* pointers for a hash table header). The elements are doubly linked
* so that an arbitrary element can be removed without a need to
* traverse the list. New elements can be added to the list before
* or after an existing element or at the head of the list. A list
* may only be traversed in the forward direction.
*
* A tail queue is headed by a pair of pointers, one to the head of the
* list and the other to the tail of the list. The elements are doubly
* linked so that an arbitrary element can be removed without a need to
* traverse the list. New elements can be added to the list before or
* after an existing element, at the head of the list, or at the end of
* the list. A tail queue may be traversed in either direction.
*
* For details on the use of these macros, see the queue(3) manual page.
*
*
* SLIST LIST STAILQ TAILQ
* _HEAD + + + +
* _HEAD_INITIALIZER + + + +
* _ENTRY + + + +
* _INIT + + + +
* _EMPTY + + + +
* _FIRST + + + +
* _NEXT + + + +
* _PREV - - - +
* _LAST - - + +
* _FOREACH + + + +
* _FOREACH_SAFE + + + +
* _FOREACH_REVERSE - - - +
* _FOREACH_REVERSE_SAFE - - - +
* _INSERT_HEAD + + + +
* _INSERT_BEFORE - + - +
* _INSERT_AFTER + + + +
* _INSERT_TAIL - - + +
* _CONCAT - - + +
* _REMOVE_AFTER + - + -
* _REMOVE_HEAD + - + -
* _REMOVE + + + +
* _SWAP + + + +
*
*/
#ifdef COGL_QUEUE_MACRO_DEBUG
/* Store the last 2 places the queue element or head was altered */
struct cogl_qm_trace {
char * lastfile;
int lastline;
char * prevfile;
int prevline;
};
#define COGL_TRACEBUF struct cogl_qm_trace trace;
#define COGL_TRASHIT(x) do {(x) = (void *)-1;} while (0)
#define COGL_QMD_SAVELINK(name, link) void **name = (void *)&(link)
#define COGL_QMD_TRACE_HEAD(head) do { \
(head)->trace.prevline = (head)->trace.lastline; \
(head)->trace.prevfile = (head)->trace.lastfile; \
(head)->trace.lastline = __LINE__; \
(head)->trace.lastfile = __FILE__; \
} while (0)
#define COGL_QMD_TRACE_ELEM(elem) do { \
(elem)->trace.prevline = (elem)->trace.lastline; \
(elem)->trace.prevfile = (elem)->trace.lastfile; \
(elem)->trace.lastline = __LINE__; \
(elem)->trace.lastfile = __FILE__; \
} while (0)
#else
#define COGL_QMD_TRACE_ELEM(elem)
#define COGL_QMD_TRACE_HEAD(head)
#define COGL_QMD_SAVELINK(name, link)
#define COGL_TRACEBUF
#define COGL_TRASHIT(x)
#endif /* COGL_QUEUE_MACRO_DEBUG */
/*
* Singly-linked List declarations.
*/
#define COGL_SLIST_HEAD(name, type) \
typedef struct _ ## name { \
type *slh_first; /* first element */ \
} name
#define COGL_SLIST_HEAD_INITIALIZER(head) \
{ NULL }
#define COGL_SLIST_ENTRY(type) \
struct { \
type *sle_next; /* next element */ \
}
/*
* Singly-linked List functions.
*/
#define COGL_SLIST_EMPTY(head) ((head)->slh_first == NULL)
#define COGL_SLIST_FIRST(head) ((head)->slh_first)
#define COGL_SLIST_FOREACH(var, head, field) \
for ((var) = COGL_SLIST_FIRST((head)); \
(var); \
(var) = COGL_SLIST_NEXT((var), field))
#define COGL_SLIST_FOREACH_SAFE(var, head, field, tvar) \
for ((var) = COGL_SLIST_FIRST((head)); \
(var) && ((tvar) = COGL_SLIST_NEXT((var), field), 1); \
(var) = (tvar))
#define COGL_SLIST_FOREACH_PREVPTR(var, varp, head, field) \
for ((varp) = &COGL_SLIST_FIRST((head)); \
((var) = *(varp)) != NULL; \
(varp) = &COGL_SLIST_NEXT((var), field))
#define COGL_SLIST_INIT(head) do { \
COGL_SLIST_FIRST((head)) = NULL; \
} while (0)
#define COGL_SLIST_INSERT_AFTER(slistelm, elm, field) do { \
COGL_SLIST_NEXT((elm), field) = COGL_SLIST_NEXT((slistelm), field); \
COGL_SLIST_NEXT((slistelm), field) = (elm); \
} while (0)
#define COGL_SLIST_INSERT_HEAD(head, elm, field) do { \
COGL_SLIST_NEXT((elm), field) = COGL_SLIST_FIRST((head)); \
COGL_SLIST_FIRST((head)) = (elm); \
} while (0)
#define COGL_SLIST_NEXT(elm, field) ((elm)->field.sle_next)
#define COGL_SLIST_REMOVE(head, elm, type, field) do { \
COGL_QMD_SAVELINK(oldnext, (elm)->field.sle_next); \
if (COGL_SLIST_FIRST((head)) == (elm)) { \
COGL_SLIST_REMOVE_HEAD((head), field); \
} \
else { \
type *curelm = COGL_SLIST_FIRST((head)); \
while (COGL_SLIST_NEXT(curelm, field) != (elm)) \
curelm = COGL_SLIST_NEXT(curelm, field); \
COGL_SLIST_REMOVE_AFTER(curelm, field); \
} \
COGL_TRASHIT(*oldnext); \
} while (0)
#define COGL_SLIST_REMOVE_AFTER(elm, field) do { \
COGL_SLIST_NEXT(elm, field) = \
COGL_SLIST_NEXT(COGL_SLIST_NEXT(elm, field), field); \
} while (0)
#define COGL_SLIST_REMOVE_HEAD(head, field) do { \
COGL_SLIST_FIRST((head)) = \
COGL_SLIST_NEXT(COGL_SLIST_FIRST((head)), field); \
} while (0)
#define COGL_SLIST_SWAP(head1, head2, type) do { \
type *swap_first = COGL_SLIST_FIRST(head1); \
COGL_SLIST_FIRST(head1) = COGL_SLIST_FIRST(head2); \
COGL_SLIST_FIRST(head2) = swap_first; \
} while (0)
/*
* Singly-linked Tail queue declarations.
*/
#define COGL_STAILQ_HEAD(name, type) \
typedef struct _ ## name { \
type *stqh_first;/* first element */ \
type **stqh_last;/* addr of last next element */ \
} name
#define COGL_STAILQ_HEAD_INITIALIZER(head) \
{ NULL, &(head).stqh_first }
#define COGL_STAILQ_ENTRY(type) \
struct { \
type *stqe_next; /* next element */ \
}
/*
* Singly-linked Tail queue functions.
*/
#define COGL_STAILQ_CONCAT(head1, head2) do { \
if (!COGL_STAILQ_EMPTY((head2))) { \
*(head1)->stqh_last = (head2)->stqh_first; \
(head1)->stqh_last = (head2)->stqh_last; \
COGL_STAILQ_INIT((head2)); \
} \
} while (0)
#define COGL_STAILQ_EMPTY(head) ((head)->stqh_first == NULL)
#define COGL_STAILQ_FIRST(head) ((head)->stqh_first)
#define COGL_STAILQ_FOREACH(var, head, field) \
for((var) = COGL_STAILQ_FIRST((head)); \
(var); \
(var) = COGL_STAILQ_NEXT((var), field))
#define COGL_STAILQ_FOREACH_SAFE(var, head, field, tvar) \
for ((var) = COGL_STAILQ_FIRST((head)); \
(var) && ((tvar) = COGL_STAILQ_NEXT((var), field), 1); \
(var) = (tvar))
#define COGL_STAILQ_INIT(head) do { \
COGL_STAILQ_FIRST((head)) = NULL; \
(head)->stqh_last = &COGL_STAILQ_FIRST((head)); \
} while (0)
#define COGL_STAILQ_INSERT_AFTER(head, tqelm, elm, field) do { \
if ((COGL_STAILQ_NEXT((elm), field) = \
COGL_STAILQ_NEXT((tqelm), field)) == NULL) \
(head)->stqh_last = &COGL_STAILQ_NEXT((elm), field); \
COGL_STAILQ_NEXT((tqelm), field) = (elm); \
} while (0)
#define COGL_STAILQ_INSERT_HEAD(head, elm, field) do { \
if ((COGL_STAILQ_NEXT((elm), field) = \
COGL_STAILQ_FIRST((head))) == NULL) \
(head)->stqh_last = &COGL_STAILQ_NEXT((elm), field); \
COGL_STAILQ_FIRST((head)) = (elm); \
} while (0)
#define COGL_STAILQ_INSERT_TAIL(head, elm, field) do { \
COGL_STAILQ_NEXT((elm), field) = NULL; \
*(head)->stqh_last = (elm); \
(head)->stqh_last = &COGL_STAILQ_NEXT((elm), field); \
} while (0)
#define COGL_STAILQ_LAST(head, type, field) \
(COGL_STAILQ_EMPTY((head)) ? \
NULL : \
((type *)(void *) \
((char *)((head)->stqh_last) - \
__offsetof(struct type, field))))
#define COGL_STAILQ_NEXT(elm, field) ((elm)->field.stqe_next)
#define COGL_STAILQ_REMOVE(head, elm, type, field) do { \
COGL_QMD_SAVELINK(oldnext, (elm)->field.stqe_next); \
if (COGL_STAILQ_FIRST((head)) == (elm)) { \
COGL_STAILQ_REMOVE_HEAD((head), field); \
} \
else { \
type *curelm = COGL_STAILQ_FIRST((head)); \
while (COGL_STAILQ_NEXT(curelm, field) != (elm)) \
curelm = COGL_STAILQ_NEXT(curelm, field); \
COGL_STAILQ_REMOVE_AFTER(head, curelm, field); \
} \
COGL_TRASHIT(*oldnext); \
} while (0)
#define COGL_STAILQ_REMOVE_AFTER(head, elm, field) do { \
if ((COGL_STAILQ_NEXT(elm, field) = \
COGL_STAILQ_NEXT(COGL_STAILQ_NEXT(elm, field), \
field)) == NULL) \
(head)->stqh_last = &COGL_STAILQ_NEXT((elm), field); \
} while (0)
#define COGL_STAILQ_REMOVE_HEAD(head, field) do { \
if ((COGL_STAILQ_FIRST((head)) = \
COGL_STAILQ_NEXT(COGL_STAILQ_FIRST((head)), field)) == NULL) \
(head)->stqh_last = &COGL_STAILQ_FIRST((head)); \
} while (0)
#define COGL_STAILQ_SWAP(head1, head2, type) do { \
type *swap_first = COGL_STAILQ_FIRST(head1); \
type **swap_last = (head1)->stqh_last; \
COGL_STAILQ_FIRST(head1) = COGL_STAILQ_FIRST(head2); \
(head1)->stqh_last = (head2)->stqh_last; \
COGL_STAILQ_FIRST(head2) = swap_first; \
(head2)->stqh_last = swap_last; \
if (COGL_STAILQ_EMPTY(head1)) \
(head1)->stqh_last = &COGL_STAILQ_FIRST(head1); \
if (COGL_STAILQ_EMPTY(head2)) \
(head2)->stqh_last = &COGL_STAILQ_FIRST(head2); \
} while (0)
/*
* List declarations.
*/
#define COGL_LIST_HEAD(name, type) \
typedef struct _ ## name { \
type *lh_first; /* first element */ \
} name
#define COGL_LIST_HEAD_INITIALIZER(head) \
{ NULL }
#define COGL_LIST_ENTRY(type) \
struct { \
type *le_next; /* next element */ \
type **le_prev; /* address of previous next element */ \
}
/*
* List functions.
*/
#if (defined(_KERNEL) && defined(INVARIANTS))
#define COGL_QMD_LIST_CHECK_HEAD(head, field) do { \
if (COGL_LIST_FIRST((head)) != NULL && \
COGL_LIST_FIRST((head))->field.le_prev != \
&COGL_LIST_FIRST((head))) \
panic("Bad list head %p first->prev != head", (head)); \
} while (0)
#define COGL_QMD_LIST_CHECK_NEXT(elm, field) do { \
if (COGL_LIST_NEXT((elm), field) != NULL && \
COGL_LIST_NEXT((elm), field)->field.le_prev != \
&((elm)->field.le_next)) \
panic("Bad link elm %p next->prev != elm", (elm)); \
} while (0)
#define COGL_QMD_LIST_CHECK_PREV(elm, field) do { \
if (*(elm)->field.le_prev != (elm)) \
panic("Bad link elm %p prev->next != elm", (elm)); \
} while (0)
#else
#define COGL_QMD_LIST_CHECK_HEAD(head, field)
#define COGL_QMD_LIST_CHECK_NEXT(elm, field)
#define COGL_QMD_LIST_CHECK_PREV(elm, field)
#endif /* (_KERNEL && INVARIANTS) */
#define COGL_LIST_EMPTY(head) ((head)->lh_first == NULL)
#define COGL_LIST_FIRST(head) ((head)->lh_first)
#define COGL_LIST_FOREACH(var, head, field) \
for ((var) = COGL_LIST_FIRST((head)); \
(var); \
(var) = COGL_LIST_NEXT((var), field))
#define COGL_LIST_FOREACH_SAFE(var, head, field, tvar) \
for ((var) = COGL_LIST_FIRST((head)); \
(var) && ((tvar) = COGL_LIST_NEXT((var), field), 1); \
(var) = (tvar))
#define COGL_LIST_INIT(head) do { \
COGL_LIST_FIRST((head)) = NULL; \
} while (0)
#define COGL_LIST_INSERT_AFTER(listelm, elm, field) do { \
COGL_QMD_LIST_CHECK_NEXT(listelm, field); \
if ((COGL_LIST_NEXT((elm), field) = \
COGL_LIST_NEXT((listelm), field)) != NULL) \
COGL_LIST_NEXT((listelm), field)->field.le_prev = \
&COGL_LIST_NEXT((elm), field); \
COGL_LIST_NEXT((listelm), field) = (elm); \
(elm)->field.le_prev = &COGL_LIST_NEXT((listelm), field); \
} while (0)
#define COGL_LIST_INSERT_BEFORE(listelm, elm, field) do { \
COGL_QMD_LIST_CHECK_PREV(listelm, field); \
(elm)->field.le_prev = (listelm)->field.le_prev; \
COGL_LIST_NEXT((elm), field) = (listelm); \
*(listelm)->field.le_prev = (elm); \
(listelm)->field.le_prev = &COGL_LIST_NEXT((elm), field); \
} while (0)
#define COGL_LIST_INSERT_HEAD(head, elm, field) do { \
COGL_QMD_LIST_CHECK_HEAD((head), field); \
if ((COGL_LIST_NEXT((elm), field) = \
COGL_LIST_FIRST((head))) != NULL) \
COGL_LIST_FIRST((head))->field.le_prev = \
&COGL_LIST_NEXT((elm), field); \
COGL_LIST_FIRST((head)) = (elm); \
(elm)->field.le_prev = &COGL_LIST_FIRST((head)); \
} while (0)
#define COGL_LIST_NEXT(elm, field) ((elm)->field.le_next)
#define COGL_LIST_REMOVE(elm, field) do { \
COGL_QMD_SAVELINK(oldnext, (elm)->field.le_next); \
COGL_QMD_SAVELINK(oldprev, (elm)->field.le_prev); \
COGL_QMD_LIST_CHECK_NEXT(elm, field); \
COGL_QMD_LIST_CHECK_PREV(elm, field); \
if (COGL_LIST_NEXT((elm), field) != NULL) \
COGL_LIST_NEXT((elm), field)->field.le_prev = \
(elm)->field.le_prev; \
*(elm)->field.le_prev = COGL_LIST_NEXT((elm), field); \
COGL_TRASHIT(*oldnext); \
COGL_TRASHIT(*oldprev); \
} while (0)
#define COGL_LIST_SWAP(head1, head2, type, field) do { \
type *swap_tmp = COGL_LIST_FIRST((head1)); \
COGL_LIST_FIRST((head1)) = COGL_LIST_FIRST((head2)); \
COGL_LIST_FIRST((head2)) = swap_tmp; \
if ((swap_tmp = COGL_LIST_FIRST((head1))) != NULL) \
swap_tmp->field.le_prev = &COGL_LIST_FIRST((head1)); \
if ((swap_tmp = COGL_LIST_FIRST((head2))) != NULL) \
swap_tmp->field.le_prev = &COGL_LIST_FIRST((head2)); \
} while (0)
/*
* Tail queue declarations.
*/
#define COGL_TAILQ_HEAD(name, type) \
typedef struct _ ## name { \
type *tqh_first; /* first element */ \
type **tqh_last; /* addr of last next element */ \
COGL_TRACEBUF \
} name
#define COGL_TAILQ_HEAD_INITIALIZER(head) \
{ NULL, &(head).tqh_first }
#define COGL_TAILQ_ENTRY(type) \
struct { \
type *tqe_next; /* next element */ \
type **tqe_prev; /* address of previous next element */ \
COGL_TRACEBUF \
}
/*
* Tail queue functions.
*/
#if (defined(_KERNEL) && defined(INVARIANTS))
#define COGL_QMD_TAILQ_CHECK_HEAD(head, field) do { \
if (!COGL_TAILQ_EMPTY(head) && \
COGL_TAILQ_FIRST((head))->field.tqe_prev != \
&COGL_TAILQ_FIRST((head))) \
panic("Bad tailq head %p first->prev != head", (head)); \
} while (0)
#define COGL_QMD_TAILQ_CHECK_TAIL(head, field) do { \
if (*(head)->tqh_last != NULL) \
panic("Bad tailq NEXT(%p->tqh_last) != NULL", (head)); \
} while (0)
#define COGL_QMD_TAILQ_CHECK_NEXT(elm, field) do { \
if (COGL_TAILQ_NEXT((elm), field) != NULL && \
COGL_TAILQ_NEXT((elm), field)->field.tqe_prev != \
&((elm)->field.tqe_next)) \
panic("Bad link elm %p next->prev != elm", (elm)); \
} while (0)
#define COGL_QMD_TAILQ_CHECK_PREV(elm, field) do { \
if (*(elm)->field.tqe_prev != (elm)) \
panic("Bad link elm %p prev->next != elm", (elm)); \
} while (0)
#else
#define COGL_QMD_TAILQ_CHECK_HEAD(head, field)
#define COGL_QMD_TAILQ_CHECK_TAIL(head, headname)
#define COGL_QMD_TAILQ_CHECK_NEXT(elm, field)
#define COGL_QMD_TAILQ_CHECK_PREV(elm, field)
#endif /* (_KERNEL && INVARIANTS) */
#define COGL_TAILQ_CONCAT(head1, head2, field) do { \
if (!COGL_TAILQ_EMPTY(head2)) { \
*(head1)->tqh_last = (head2)->tqh_first; \
(head2)->tqh_first->field.tqe_prev = (head1)->tqh_last; \
(head1)->tqh_last = (head2)->tqh_last; \
COGL_TAILQ_INIT((head2)); \
COGL_QMD_TRACE_HEAD(head1); \
COGL_QMD_TRACE_HEAD(head2); \
} \
} while (0)
#define COGL_TAILQ_EMPTY(head) ((head)->tqh_first == NULL)
#define COGL_TAILQ_FIRST(head) ((head)->tqh_first)
#define COGL_TAILQ_FOREACH(var, head, field) \
for ((var) = COGL_TAILQ_FIRST((head)); \
(var); \
(var) = COGL_TAILQ_NEXT((var), field))
#define COGL_TAILQ_FOREACH_SAFE(var, head, field, tvar) \
for ((var) = COGL_TAILQ_FIRST((head)); \
(var) && ((tvar) = COGL_TAILQ_NEXT((var), field), 1); \
(var) = (tvar))
#define COGL_TAILQ_FOREACH_REVERSE(var, head, headname, field) \
for ((var) = COGL_TAILQ_LAST((head), headname); \
(var); \
(var) = COGL_TAILQ_PREV((var), headname, field))
#define COGL_TAILQ_FOREACH_REVERSE_SAFE(var, head, headname, field, tvar) \
for ((var) = COGL_TAILQ_LAST((head), headname); \
(var) && ((tvar) = COGL_TAILQ_PREV((var), headname, field), 1); \
(var) = (tvar))
#define COGL_TAILQ_INIT(head) do { \
COGL_TAILQ_FIRST((head)) = NULL; \
(head)->tqh_last = &COGL_TAILQ_FIRST((head)); \
COGL_QMD_TRACE_HEAD(head); \
} while (0)
#define COGL_TAILQ_INSERT_AFTER(head, listelm, elm, field) do { \
COGL_QMD_TAILQ_CHECK_NEXT(listelm, field); \
if ((COGL_TAILQ_NEXT((elm), field) = \
COGL_TAILQ_NEXT((listelm), field)) != NULL) \
COGL_TAILQ_NEXT((elm), field)->field.tqe_prev = \
&COGL_TAILQ_NEXT((elm), field); \
else { \
(head)->tqh_last = &COGL_TAILQ_NEXT((elm), field); \
COGL_QMD_TRACE_HEAD(head); \
} \
COGL_TAILQ_NEXT((listelm), field) = (elm); \
(elm)->field.tqe_prev = &COGL_TAILQ_NEXT((listelm), field); \
COGL_QMD_TRACE_ELEM(&(elm)->field); \
COGL_QMD_TRACE_ELEM(&listelm->field); \
} while (0)
#define COGL_TAILQ_INSERT_BEFORE(listelm, elm, field) do { \
COGL_QMD_TAILQ_CHECK_PREV(listelm, field); \
(elm)->field.tqe_prev = (listelm)->field.tqe_prev; \
COGL_TAILQ_NEXT((elm), field) = (listelm); \
*(listelm)->field.tqe_prev = (elm); \
(listelm)->field.tqe_prev = &COGL_TAILQ_NEXT((elm), field); \
COGL_QMD_TRACE_ELEM(&(elm)->field); \
COGL_QMD_TRACE_ELEM(&listelm->field); \
} while (0)
#define COGL_TAILQ_INSERT_HEAD(head, elm, field) do { \
COGL_QMD_TAILQ_CHECK_HEAD(head, field); \
if ((COGL_TAILQ_NEXT((elm), field) = \
COGL_TAILQ_FIRST((head))) != NULL) \
COGL_TAILQ_FIRST((head))->field.tqe_prev = \
&COGL_TAILQ_NEXT((elm), field); \
else \
(head)->tqh_last = &COGL_TAILQ_NEXT((elm), field); \
COGL_TAILQ_FIRST((head)) = (elm); \
(elm)->field.tqe_prev = &COGL_TAILQ_FIRST((head)); \
COGL_QMD_TRACE_HEAD(head); \
COGL_QMD_TRACE_ELEM(&(elm)->field); \
} while (0)
#define COGL_TAILQ_INSERT_TAIL(head, elm, field) do { \
COGL_QMD_TAILQ_CHECK_TAIL(head, field); \
COGL_TAILQ_NEXT((elm), field) = NULL; \
(elm)->field.tqe_prev = (head)->tqh_last; \
*(head)->tqh_last = (elm); \
(head)->tqh_last = &COGL_TAILQ_NEXT((elm), field); \
COGL_QMD_TRACE_HEAD(head); \
COGL_QMD_TRACE_ELEM(&(elm)->field); \
} while (0)
#define COGL_TAILQ_LAST(head, headname) \
(*(((headname *)((head)->tqh_last))->tqh_last))
#define COGL_TAILQ_NEXT(elm, field) ((elm)->field.tqe_next)
#define COGL_TAILQ_PREV(elm, headname, field) \
(*(((headname *)((elm)->field.tqe_prev))->tqh_last))
#define COGL_TAILQ_REMOVE(head, elm, field) do { \
COGL_QMD_SAVELINK(oldnext, (elm)->field.tqe_next); \
COGL_QMD_SAVELINK(oldprev, (elm)->field.tqe_prev); \
COGL_QMD_TAILQ_CHECK_NEXT(elm, field); \
COGL_QMD_TAILQ_CHECK_PREV(elm, field); \
if ((COGL_TAILQ_NEXT((elm), field)) != NULL) \
COGL_TAILQ_NEXT((elm), field)->field.tqe_prev = \
(elm)->field.tqe_prev; \
else { \
(head)->tqh_last = (elm)->field.tqe_prev; \
COGL_QMD_TRACE_HEAD(head); \
} \
*(elm)->field.tqe_prev = COGL_TAILQ_NEXT((elm), field); \
COGL_TRASHIT(*oldnext); \
COGL_TRASHIT(*oldprev); \
COGL_QMD_TRACE_ELEM(&(elm)->field); \
} while (0)
#define COGL_TAILQ_SWAP(head1, head2, type, field) do { \
type *swap_first = (head1)->tqh_first; \
type **swap_last = (head1)->tqh_last; \
(head1)->tqh_first = (head2)->tqh_first; \
(head1)->tqh_last = (head2)->tqh_last; \
(head2)->tqh_first = swap_first; \
(head2)->tqh_last = swap_last; \
if ((swap_first = (head1)->tqh_first) != NULL) \
swap_first->field.tqe_prev = &(head1)->tqh_first; \
else \
(head1)->tqh_last = &(head1)->tqh_first; \
if ((swap_first = (head2)->tqh_first) != NULL) \
swap_first->field.tqe_prev = &(head2)->tqh_first; \
else \
(head2)->tqh_last = &(head2)->tqh_first; \
} while (0)
#endif /* !_COGL_QUEUE_H_ */