1 /* $OpenBSD: list.h,v 1.2 2021/07/27 13:36:59 mglocker Exp $ */ 2 /* linux list functions for the BSDs, cut down for dwctwo(4). 3 * Created: Mon Apr 7 14:30:16 1999 by anholt@FreeBSD.org 4 */ 5 /*- 6 * Copyright 2003 Eric Anholt 7 * All Rights Reserved. 8 * 9 * Permission is hereby granted, free of charge, to any person obtaining a 10 * copy of this software and associated documentation files (the "Software"), 11 * to deal in the Software without restriction, including without limitation 12 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 13 * and/or sell copies of the Software, and to permit persons to whom the 14 * Software is furnished to do so, subject to the following conditions: 15 * 16 * The above copyright notice and this permission notice (including the next 17 * paragraph) shall be included in all copies or substantial portions of the 18 * Software. 19 * 20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 23 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 24 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 25 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 26 * OTHER DEALINGS IN THE SOFTWARE. 27 * 28 * Authors: 29 * Eric Anholt <anholt@FreeBSD.org> 30 * 31 */ 32 33 #ifndef _DWC2_LINUX_LIST_H_ 34 #define _DWC2_LINUX_LIST_H_ 35 36 /* 37 * From <dev/pci/drm/include/linux/kernel.h> 38 */ 39 #define container_of(ptr, type, member) ({ \ 40 const __typeof( ((type *)0)->member ) *__mptr = (ptr); \ 41 (type *)( (char *)__mptr - offsetof(type,member) );}) 42 43 /* 44 * From <dev/pci/drm/include/linux/types.h> 45 */ 46 typedef unsigned int gfp_t; 47 48 struct list_head { 49 struct list_head *next, *prev; 50 }; 51 52 /* 53 * From <dev/pci/drm/include/linux/list.h> 54 */ 55 #define list_entry(ptr, type, member) container_of(ptr, type, member) 56 57 static inline void 58 INIT_LIST_HEAD(struct list_head *head) { 59 (head)->next = head; 60 (head)->prev = head; 61 } 62 63 static inline int 64 list_empty(const struct list_head *head) { 65 return (head)->next == head; 66 } 67 68 static inline void 69 list_add(struct list_head *new, struct list_head *head) { 70 (head)->next->prev = new; 71 (new)->next = (head)->next; 72 (new)->prev = head; 73 (head)->next = new; 74 } 75 76 static inline void 77 list_add_tail(struct list_head *entry, struct list_head *head) { 78 (entry)->prev = (head)->prev; 79 (entry)->next = head; 80 (head)->prev->next = entry; 81 (head)->prev = entry; 82 } 83 84 static inline void 85 list_del(struct list_head *entry) { 86 (entry)->next->prev = (entry)->prev; 87 (entry)->prev->next = (entry)->next; 88 } 89 90 static inline void list_move(struct list_head *list, struct list_head *head) 91 { 92 list_del(list); 93 list_add(list, head); 94 } 95 96 static inline void list_move_tail(struct list_head *list, 97 struct list_head *head) 98 { 99 list_del(list); 100 list_add_tail(list, head); 101 } 102 103 static inline void 104 list_del_init(struct list_head *entry) { 105 (entry)->next->prev = (entry)->prev; 106 (entry)->prev->next = (entry)->next; 107 INIT_LIST_HEAD(entry); 108 } 109 110 #define list_for_each(entry, head) \ 111 for (entry = (head)->next; entry != head; entry = (entry)->next) 112 113 #define list_for_each_safe(entry, temp, head) \ 114 for (entry = (head)->next, temp = (entry)->next; \ 115 entry != head; \ 116 entry = temp, temp = entry->next) 117 118 #define list_for_each_entry(pos, head, member) \ 119 for (pos = list_entry((head)->next, __typeof(*pos), member); \ 120 &pos->member != (head); \ 121 pos = list_entry(pos->member.next, __typeof(*pos), member)) 122 123 #define list_for_each_entry_safe(pos, n, head, member) \ 124 for (pos = list_entry((head)->next, __typeof(*pos), member), \ 125 n = list_entry(pos->member.next, __typeof(*pos), member); \ 126 &pos->member != (head); \ 127 pos = n, n = list_entry(n->member.next, __typeof(*n), member)) 128 129 #define list_first_entry(ptr, type, member) \ 130 list_entry((ptr)->next, type, member) 131 132 #endif /* _DWC2_LINUX_LIST_H_ */ 133