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Annotation of prex-old/include/sys/list.h, Revision 1.1.1.1

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 */