1 /* drm_linux_list.h -- linux list functions for the BSDs. 2 * Created: Mon Apr 7 14:30:16 1999 by anholt@FreeBSD.org 3 */ 4 /*- 5 * Copyright 2003 Eric Anholt 6 * All Rights Reserved. 7 * 8 * Permission is hereby granted, free of charge, to any person obtaining a 9 * copy of this software and associated documentation files (the "Software"), 10 * to deal in the Software without restriction, including without limitation 11 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 12 * and/or sell copies of the Software, and to permit persons to whom the 13 * Software is furnished to do so, subject to the following conditions: 14 * 15 * The above copyright notice and this permission notice (including the next 16 * paragraph) shall be included in all copies or substantial portions of the 17 * Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 22 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 23 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 24 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 25 * OTHER DEALINGS IN THE SOFTWARE. 26 * 27 * Authors: 28 * Eric Anholt <anholt@FreeBSD.org> 29 * 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #ifndef _DRM_LINUX_LIST_H_ 36 #define _DRM_LINUX_LIST_H_ 37 38 struct list_head { 39 struct list_head *next, *prev; 40 }; 41 42 #define list_entry(ptr, type, member) container_of(ptr,type,member) 43 44 static __inline__ void 45 INIT_LIST_HEAD(struct list_head *head) { 46 (head)->next = head; 47 (head)->prev = head; 48 } 49 50 #define LIST_HEAD_INIT(name) { &(name), &(name) } 51 52 #define DRM_LIST_HEAD(name) \ 53 struct list_head name = LIST_HEAD_INIT(name) 54 55 static __inline__ int 56 list_empty(const struct list_head *head) { 57 return (head)->next == head; 58 } 59 60 static __inline__ void 61 list_add(struct list_head *new, struct list_head *head) { 62 (head)->next->prev = new; 63 (new)->next = (head)->next; 64 (new)->prev = head; 65 (head)->next = new; 66 } 67 68 static __inline__ void 69 list_add_tail(struct list_head *entry, struct list_head *head) { 70 (entry)->prev = (head)->prev; 71 (entry)->next = head; 72 (head)->prev->next = entry; 73 (head)->prev = entry; 74 } 75 76 static __inline__ void 77 list_del(struct list_head *entry) { 78 (entry)->next->prev = (entry)->prev; 79 (entry)->prev->next = (entry)->next; 80 } 81 82 static inline void list_replace(struct list_head *old, 83 struct list_head *new) 84 { 85 new->next = old->next; 86 new->next->prev = new; 87 new->prev = old->prev; 88 new->prev->next = new; 89 } 90 91 static inline void list_move(struct list_head *list, struct list_head *head) 92 { 93 list_del(list); 94 list_add(list, head); 95 } 96 97 static inline void list_move_tail(struct list_head *list, 98 struct list_head *head) 99 { 100 list_del(list); 101 list_add_tail(list, head); 102 } 103 104 static __inline__ void 105 list_del_init(struct list_head *entry) { 106 (entry)->next->prev = (entry)->prev; 107 (entry)->prev->next = (entry)->next; 108 INIT_LIST_HEAD(entry); 109 } 110 111 #define list_for_each(entry, head) \ 112 for (entry = (head)->next; entry != head; entry = (entry)->next) 113 114 #define list_for_each_prev(entry, head) \ 115 for (entry = (head)->prev; entry != (head); \ 116 entry = entry->prev) 117 118 #define list_for_each_safe(entry, temp, head) \ 119 for (entry = (head)->next, temp = (entry)->next; \ 120 entry != head; \ 121 entry = temp, temp = entry->next) 122 123 #define list_for_each_entry(pos, head, member) \ 124 for (pos = list_entry((head)->next, __typeof(*pos), member); \ 125 &pos->member != (head); \ 126 pos = list_entry(pos->member.next, __typeof(*pos), member)) 127 128 #define list_for_each_entry_continue_reverse(pos, head, member) \ 129 for (pos = list_entry(pos->member.prev, __typeof(*pos), member); \ 130 &pos->member != (head); \ 131 pos = list_entry(pos->member.prev, __typeof(*pos), member)) 132 133 /** 134 * list_for_each_entry_safe - iterate over list of given type safe against removal of list entry 135 * @pos: the type * to use as a loop cursor. 136 * @n: another type * to use as temporary storage 137 * @head: the head for your list. 138 * @member: the name of the list_struct within the struct. 139 */ 140 #define list_for_each_entry_safe(pos, n, head, member) \ 141 for (pos = list_entry((head)->next, __typeof(*pos), member), \ 142 n = list_entry(pos->member.next, __typeof(*pos), member); \ 143 &pos->member != (head); \ 144 pos = n, n = list_entry(n->member.next, __typeof(*n), member)) 145 146 #define list_for_each_entry_safe_from(pos, n, head, member) \ 147 for (n = list_entry(pos->member.next, __typeof(*pos), member); \ 148 &pos->member != (head); \ 149 pos = n, n = list_entry(n->member.next, __typeof(*n), member)) 150 151 #define list_first_entry(ptr, type, member) \ 152 list_entry((ptr)->next, type, member) 153 154 155 static inline void 156 __list_splice(const struct list_head *list, struct list_head *prev, 157 struct list_head *next) 158 { 159 struct list_head *first = list->next; 160 struct list_head *last = list->prev; 161 162 first->prev = prev; 163 prev->next = first; 164 165 last->next = next; 166 next->prev = last; 167 } 168 169 static inline void 170 list_splice(const struct list_head *list, struct list_head *head) 171 { 172 if (list_empty(list)) 173 return; 174 175 __list_splice(list, head, head->next); 176 } 177 178 void drm_list_sort(void *priv, struct list_head *head, int (*cmp)(void *priv, 179 struct list_head *a, struct list_head *b)); 180 181 /* hlist, copied from sys/dev/ofed/linux/list.h */ 182 183 struct hlist_head { 184 struct hlist_node *first; 185 }; 186 187 struct hlist_node { 188 struct hlist_node *next, **pprev; 189 }; 190 191 #define HLIST_HEAD_INIT { } 192 #define HLIST_HEAD(name) struct hlist_head name = HLIST_HEAD_INIT 193 #define INIT_HLIST_HEAD(head) (head)->first = NULL 194 #define INIT_HLIST_NODE(node) \ 195 do { \ 196 (node)->next = NULL; \ 197 (node)->pprev = NULL; \ 198 } while (0) 199 200 static inline int 201 hlist_unhashed(const struct hlist_node *h) 202 { 203 204 return !h->pprev; 205 } 206 207 static inline int 208 hlist_empty(const struct hlist_head *h) 209 { 210 211 return !h->first; 212 } 213 214 static inline void 215 hlist_del(struct hlist_node *n) 216 { 217 218 if (n->next) 219 n->next->pprev = n->pprev; 220 *n->pprev = n->next; 221 } 222 223 static inline void 224 hlist_del_init(struct hlist_node *n) 225 { 226 227 if (hlist_unhashed(n)) 228 return; 229 hlist_del(n); 230 INIT_HLIST_NODE(n); 231 } 232 233 static inline void 234 hlist_add_head(struct hlist_node *n, struct hlist_head *h) 235 { 236 237 n->next = h->first; 238 if (h->first) 239 h->first->pprev = &n->next; 240 h->first = n; 241 n->pprev = &h->first; 242 } 243 244 static inline void 245 hlist_add_before(struct hlist_node *n, struct hlist_node *next) 246 { 247 248 n->pprev = next->pprev; 249 n->next = next; 250 next->pprev = &n->next; 251 *(n->pprev) = n; 252 } 253 254 static inline void 255 hlist_add_after(struct hlist_node *n, struct hlist_node *next) 256 { 257 258 next->next = n->next; 259 n->next = next; 260 next->pprev = &n->next; 261 if (next->next) 262 next->next->pprev = &next->next; 263 } 264 265 static inline void 266 hlist_move_list(struct hlist_head *old, struct hlist_head *new) 267 { 268 269 new->first = old->first; 270 if (new->first) 271 new->first->pprev = &new->first; 272 old->first = NULL; 273 } 274 275 #define hlist_entry(ptr, type, field) container_of(ptr, type, field) 276 277 #define hlist_for_each(p, head) \ 278 for (p = (head)->first; p; p = p->next) 279 280 #define hlist_for_each_safe(p, n, head) \ 281 for (p = (head)->first; p && ({ n = p->next; 1; }); p = n) 282 283 #define hlist_for_each_entry(tp, p, head, field) \ 284 for (p = (head)->first; \ 285 p ? (tp = hlist_entry(p, typeof(*tp), field)): NULL; p = p->next) 286 287 #define hlist_for_each_entry_continue(tp, p, field) \ 288 for (p = (p)->next; \ 289 p ? (tp = hlist_entry(p, typeof(*tp), field)): NULL; p = p->next) 290 291 #define hlist_for_each_entry_from(tp, p, field) \ 292 for (; p ? (tp = hlist_entry(p, typeof(*tp), field)): NULL; p = p->next) 293 294 #define hlist_for_each_entry_safe(tpos, pos, n, head, member) \ 295 for (pos = (head)->first; \ 296 (pos) != 0 && ({ n = (pos)->next; \ 297 tpos = hlist_entry((pos), typeof(*(tpos)), member); 1;}); \ 298 pos = (n)) 299 300 #endif /* _DRM_LINUX_LIST_H_ */ 301