139890fd20
This is required for the VIA driver and at least some parts are needed for GEM. MFC after: 2 weeks
111 lines
3.5 KiB
C
111 lines
3.5 KiB
C
/* drm_linux_list.h -- linux list functions for the BSDs.
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* Created: Mon Apr 7 14:30:16 1999 by anholt@FreeBSD.org
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*/
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/*-
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* Copyright 2003 Eric Anholt
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Eric Anholt <anholt@FreeBSD.org>
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifndef _DRM_LINUX_LIST_H_
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#define _DRM_LINUX_LIST_H_
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struct list_head {
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struct list_head *next, *prev;
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};
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#define list_entry(ptr, type, member) container_of(ptr,type,member)
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#define hlist_entry(ptr, type, member) container_of(ptr,type,member)
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static __inline__ void
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INIT_LIST_HEAD(struct list_head *head) {
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(head)->next = head;
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(head)->prev = head;
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}
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static __inline__ int
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list_empty(struct list_head *head) {
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return (head)->next == head;
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}
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static __inline__ void
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list_add(struct list_head *new, struct list_head *head) {
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(head)->next->prev = new;
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(new)->next = (head)->next;
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(new)->prev = head;
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(head)->next = new;
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}
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static __inline__ void
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list_add_tail(struct list_head *entry, struct list_head *head) {
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(entry)->prev = (head)->prev;
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(entry)->next = head;
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(head)->prev->next = entry;
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(head)->prev = entry;
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}
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static __inline__ void
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list_del(struct list_head *entry) {
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(entry)->next->prev = (entry)->prev;
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(entry)->prev->next = (entry)->next;
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}
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static __inline__ void
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list_del_init(struct list_head *entry) {
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(entry)->next->prev = (entry)->prev;
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(entry)->prev->next = (entry)->next;
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INIT_LIST_HEAD(entry);
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}
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#define list_for_each(entry, head) \
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for (entry = (head)->next; entry != head; entry = (entry)->next)
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#define list_for_each_prev(entry, head) \
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for (entry = (head)->prev; entry != (head); \
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entry = entry->prev)
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#define list_for_each_safe(entry, temp, head) \
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for (entry = (head)->next, temp = (entry)->next; \
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entry != head; \
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entry = temp, temp = entry->next)
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/**
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* list_for_each_entry_safe - iterate over list of given type safe against removal of list entry
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* @pos: the type * to use as a loop cursor.
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* @n: another type * to use as temporary storage
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* @head: the head for your list.
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* @member: the name of the list_struct within the struct.
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*/
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#define list_for_each_entry_safe(pos, n, head, member) \
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for (pos = list_entry((head)->next, __typeof(*pos), member), \
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n = list_entry(pos->member.next, __typeof(*pos), member); \
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&pos->member != (head); \
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pos = n, n = list_entry(n->member.next, __typeof(*n), member))
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#endif /* _DRM_LINUX_LIST_H_ */
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