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Annotation of prex-old/include/sys/list.h, Revision 1.1

1.1     ! nbrk        1: /*
        !             2:  * Copyright (c) 2005-2007, 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 _SYS_LIST_H
        !            31: #define _SYS_LIST_H
        !            32:
        !            33: #include <sys/cdefs.h>
        !            34:
        !            35: struct list {
        !            36:        struct list *next;
        !            37:        struct list *prev;
        !            38: };
        !            39:
        !            40: typedef struct list *list_t;
        !            41:
        !            42: #define list_init(head)                ((head)->next = (head)->prev = (head))
        !            43: #define list_next(node)                ((node)->next)
        !            44: #define list_prev(node)                ((node)->prev)
        !            45: #define list_empty(head)       ((head)->next == (head))
        !            46: #define list_first(head)       ((head)->next)
        !            47: #define list_last(head)                ((head)->prev)
        !            48: #define list_end(head, node)   ((node) == (head))
        !            49:
        !            50: /*
        !            51:  * Get the struct for this entry
        !            52:  */
        !            53: #define list_entry(p, type, member) \
        !            54:     ((type *)((char *)(p) - (unsigned long)(&((type *)0)->member)))
        !            55:
        !            56: #define LIST_INIT(head) { &(head), &(head) }
        !            57:
        !            58: /*
        !            59:  * Insert new node after specified node
        !            60:  */
        !            61: static __inline void
        !            62: list_insert(list_t prev, list_t node)
        !            63: {
        !            64:        prev->next->prev = node;
        !            65:        node->next = prev->next;
        !            66:        node->prev = prev;
        !            67:        prev->next = node;
        !            68: }
        !            69:
        !            70: /*
        !            71:  * Remove specified node from list
        !            72:  */
        !            73: static __inline void
        !            74: list_remove(list_t node)
        !            75: {
        !            76:        node->prev->next = node->next;
        !            77:        node->next->prev = node->prev;
        !            78: }
        !            79:
        !            80: #endif /* !_SYS_LIST_H */