1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) HighPoint Technologies, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 #include <dev/hptrr/hptrr_config.h> 29 /* 30 * $Id: list.h,v 1.6 2006/10/31 06:25:28 gmm Exp $ 31 * Copyright (C) 2004-2005 HighPoint Technologies, Inc. All rights reserved. 32 */ 33 #ifndef _HPT_LIST_H_ 34 #define _HPT_LIST_H_ 35 36 #ifndef _LINUX_LIST_H 37 38 #ifndef HPT_INLINE 39 #define HPT_INLINE __inline 40 #endif 41 42 struct list_head { 43 struct list_head *next, *prev; 44 }; 45 46 #define INIT_LIST_HEAD(ptr) do { (ptr)->next = (ptr); (ptr)->prev = (ptr); } while (0) 47 48 static HPT_INLINE void __list_add(struct list_head * _new, struct list_head * prev, struct list_head * next) 49 { 50 next->prev = _new; 51 _new->next = next; 52 _new->prev = prev; 53 prev->next = _new; 54 } 55 56 static HPT_INLINE void list_add(struct list_head *_new, struct list_head *head) 57 { 58 __list_add(_new, head, head->next); 59 } 60 61 static HPT_INLINE void list_add_tail(struct list_head *_new, struct list_head *head) 62 { 63 __list_add(_new, head->prev, head); 64 } 65 66 static HPT_INLINE void __list_del(struct list_head * prev, struct list_head * next) 67 { 68 next->prev = prev; 69 prev->next = next; 70 } 71 72 static HPT_INLINE void list_del(struct list_head *entry) 73 { 74 __list_del(entry->prev, entry->next); 75 } 76 77 static HPT_INLINE void list_del_init(struct list_head *entry) 78 { 79 __list_del(entry->prev, entry->next); 80 INIT_LIST_HEAD(entry); 81 } 82 83 static HPT_INLINE int list_empty(struct list_head *head) 84 { 85 HPT_ASSERT(!(head->next==head && head->prev!=head)); 86 return head->next == head; 87 } 88 89 static HPT_INLINE void __list_splice(struct list_head *list, 90 struct list_head *head) 91 { 92 struct list_head *first = list->next; 93 struct list_head *last = list->prev; 94 struct list_head *at = head->next; 95 96 first->prev = head; 97 head->next = first; 98 99 last->next = at; 100 at->prev = last; 101 } 102 103 static HPT_INLINE void list_splice(struct list_head *list, struct list_head *head) 104 { 105 if (!list_empty(list)) 106 __list_splice(list, head); 107 } 108 109 static HPT_INLINE void list_splice_init(struct list_head *list, struct list_head *head) 110 { 111 if (!list_empty(list)) { 112 __list_splice(list, head); 113 INIT_LIST_HEAD(list); 114 } 115 } 116 117 #define list_entry(ptr, type, member) \ 118 ((type *)((char *)(ptr)-(HPT_UPTR)(&((type *)0)->member))) 119 120 #define list_for_each(pos, head) \ 121 for (pos = (head)->next; pos != (head); pos = pos->next) 122 123 #define list_for_each_safe(pos, n, head) \ 124 for (pos = (head)->next, n = pos->next; pos != (head); \ 125 pos = n, n = pos->next) 126 127 #define get_first_item(attached, type, member) \ 128 ((type *)((char *)((attached)->next)-(HPT_UPTR)(&((type *)0)->member))) 129 130 #endif 131 132 #endif 133