1 /*- 2 * Copyright (c) 2011 HighPoint Technologies, Inc. 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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #include <dev/hpt27xx/hpt27xx_config.h> 30 31 #ifndef _HPT_LIST_H_ 32 #define _HPT_LIST_H_ 33 34 #ifndef _LINUX_LIST_H 35 36 #ifndef HPT_INLINE 37 #define HPT_INLINE __inline 38 #endif 39 40 struct list_head { 41 struct list_head *next, *prev; 42 }; 43 44 #define INIT_LIST_HEAD(ptr) do { (ptr)->next = (ptr); (ptr)->prev = (ptr); } while (0) 45 46 static HPT_INLINE void __list_add(struct list_head * _new, struct list_head * prev, struct list_head * next) 47 { 48 next->prev = _new; 49 _new->next = next; 50 _new->prev = prev; 51 prev->next = _new; 52 } 53 54 static HPT_INLINE void list_add(struct list_head *_new, struct list_head *head) 55 { 56 __list_add(_new, head, head->next); 57 } 58 59 static HPT_INLINE void list_add_tail(struct list_head *_new, struct list_head *head) 60 { 61 __list_add(_new, head->prev, head); 62 } 63 64 static HPT_INLINE void __list_del(struct list_head * prev, struct list_head * next) 65 { 66 next->prev = prev; 67 prev->next = next; 68 } 69 70 static HPT_INLINE void list_del(struct list_head *entry) 71 { 72 __list_del(entry->prev, entry->next); 73 } 74 75 static HPT_INLINE void list_del_init(struct list_head *entry) 76 { 77 __list_del(entry->prev, entry->next); 78 INIT_LIST_HEAD(entry); 79 } 80 81 static HPT_INLINE int list_empty(struct list_head *head) 82 { 83 HPT_ASSERT(!(head->next==head && head->prev!=head)); 84 return head->next == head; 85 } 86 87 static HPT_INLINE void __list_splice(struct list_head *list, 88 struct list_head *head) 89 { 90 struct list_head *first = list->next; 91 struct list_head *last = list->prev; 92 struct list_head *at = head->next; 93 94 first->prev = head; 95 head->next = first; 96 97 last->next = at; 98 at->prev = last; 99 } 100 101 static HPT_INLINE void list_splice(struct list_head *list, struct list_head *head) 102 { 103 if (!list_empty(list)) 104 __list_splice(list, head); 105 } 106 107 static HPT_INLINE void list_splice_init(struct list_head *list, struct list_head *head) 108 { 109 if (!list_empty(list)) { 110 __list_splice(list, head); 111 INIT_LIST_HEAD(list); 112 } 113 } 114 115 #define list_entry(ptr, type, member) \ 116 ((type *)((char *)(ptr)-(HPT_UPTR)(&((type *)0)->member))) 117 118 #define list_for_each(pos, head) \ 119 for (pos = (head)->next; pos != (head); pos = pos->next) 120 121 #define list_for_each_safe(pos, n, head) \ 122 for (pos = (head)->next, n = pos->next; pos != (head); \ 123 pos = n, n = pos->next) 124 125 #define get_first_item(attached, type, member) \ 126 ((type *)((char *)((attached)->next)-(HPT_UPTR)(&((type *)0)->member))) 127 128 #endif 129 130 #endif 131