Annotation of prex-old/sys/include/queue.h, Revision 1.1
1.1 ! nbrk 1: /*-
! 2: * Copyright (c) 2005, Kohsuke Ohtani
! 3: * All rights reserved.
! 4: *
! 5: * Redistribution and use in source and binary forms, with or without
! 6: * modification, are permitted provided that the following conditions
! 7: * are met:
! 8: * 1. Redistributions of source code must retain the above copyright
! 9: * notice, this list of conditions and the following disclaimer.
! 10: * 2. Redistributions in binary form must reproduce the above copyright
! 11: * notice, this list of conditions and the following disclaimer in the
! 12: * documentation and/or other materials provided with the distribution.
! 13: * 3. Neither the name of the author nor the names of any co-contributors
! 14: * may be used to endorse or promote products derived from this software
! 15: * without specific prior written permission.
! 16: *
! 17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
! 18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
! 21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 27: * SUCH DAMAGE.
! 28: */
! 29:
! 30: #ifndef _QUEUE_H
! 31: #define _QUEUE_H
! 32:
! 33: struct queue {
! 34: struct queue *next;
! 35: struct queue *prev;
! 36: };
! 37: typedef struct queue *queue_t;
! 38:
! 39: #define queue_init(head) ((head)->next = (head)->prev = (head))
! 40: #define queue_empty(head) ((head)->next == (head))
! 41: #define queue_next(q) ((q)->next)
! 42: #define queue_prev(q) ((q)->prev)
! 43: #define queue_first(head) ((head)->next)
! 44: #define queue_last(head) ((head)->prev)
! 45: #define queue_end(head,q) ((q) == (head))
! 46:
! 47: /* Get the struct for this entry */
! 48: #define queue_entry(q, type, member) \
! 49: ((type *)((char *)(q) - (unsigned long)(&((type *)0)->member)))
! 50:
! 51: extern void enqueue(queue_t, queue_t);
! 52: extern queue_t dequeue(queue_t);
! 53: extern void queue_insert(queue_t, queue_t);
! 54: extern void queue_remove(queue_t);
! 55:
! 56: #endif /* !_QUEUE_H */
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