Cory McWilliams
ae0a8b0a33
git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@4336 ed5197a5-7fde-0310-b194-c3ffbd925b24
91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/* Copyright (c) 2013, Ben Noordhuis <info@bnoordhuis.nl>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef QUEUE_H_
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#define QUEUE_H_
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#include <stddef.h>
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#define uv__queue_data(pointer, type, field) \
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((type*) ((char*) (pointer) - offsetof(type, field)))
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#define uv__queue_foreach(q, h) \
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for ((q) = (h)->next; (q) != (h); (q) = (q)->next)
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static inline void uv__queue_init(struct uv__queue* q) {
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q->next = q;
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q->prev = q;
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}
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static inline int uv__queue_empty(const struct uv__queue* q) {
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return q == q->next;
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}
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static inline struct uv__queue* uv__queue_head(const struct uv__queue* q) {
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return q->next;
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}
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static inline struct uv__queue* uv__queue_next(const struct uv__queue* q) {
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return q->next;
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}
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static inline void uv__queue_add(struct uv__queue* h, struct uv__queue* n) {
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h->prev->next = n->next;
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n->next->prev = h->prev;
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h->prev = n->prev;
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h->prev->next = h;
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}
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static inline void uv__queue_split(struct uv__queue* h,
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struct uv__queue* q,
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struct uv__queue* n) {
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n->prev = h->prev;
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n->prev->next = n;
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n->next = q;
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h->prev = q->prev;
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h->prev->next = h;
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q->prev = n;
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}
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static inline void uv__queue_move(struct uv__queue* h, struct uv__queue* n) {
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if (uv__queue_empty(h))
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uv__queue_init(n);
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else
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uv__queue_split(h, h->next, n);
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}
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static inline void uv__queue_insert_head(struct uv__queue* h,
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struct uv__queue* q) {
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q->next = h->next;
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q->prev = h;
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q->next->prev = q;
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h->next = q;
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}
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static inline void uv__queue_insert_tail(struct uv__queue* h,
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struct uv__queue* q) {
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q->next = h;
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q->prev = h->prev;
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q->prev->next = q;
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h->prev = q;
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}
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static inline void uv__queue_remove(struct uv__queue* q) {
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q->prev->next = q->next;
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q->next->prev = q->prev;
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}
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#endif /* QUEUE_H_ */
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