98 lines
2.6 KiB
C
98 lines
2.6 KiB
C
/*
|
|
* Copyright © 2010 Intel Corporation
|
|
* Copyright © 2010 Francisco Jerez <currojerez@riseup.net>
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the next
|
|
* paragraph) shall be included in all copies or substantial portions of the
|
|
* Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
* IN THE SOFTWARE.
|
|
*
|
|
*/
|
|
|
|
#ifndef _LIST_H_
|
|
#define _LIST_H_
|
|
|
|
/* classic doubly-link circular list */
|
|
struct list {
|
|
struct list *next, *prev;
|
|
};
|
|
|
|
static void
|
|
list_init(struct list *list)
|
|
{
|
|
list->next = list->prev = list;
|
|
}
|
|
|
|
static inline void
|
|
__list_add(struct list *entry,
|
|
struct list *prev,
|
|
struct list *next)
|
|
{
|
|
next->prev = entry;
|
|
entry->next = next;
|
|
entry->prev = prev;
|
|
prev->next = entry;
|
|
}
|
|
|
|
static inline void
|
|
list_add(struct list *entry, struct list *head)
|
|
{
|
|
__list_add(entry, head, head->next);
|
|
}
|
|
|
|
static inline void
|
|
__list_del(struct list *prev, struct list *next)
|
|
{
|
|
next->prev = prev;
|
|
prev->next = next;
|
|
}
|
|
|
|
static inline void
|
|
list_del(struct list *entry)
|
|
{
|
|
__list_del(entry->prev, entry->next);
|
|
list_init(entry);
|
|
}
|
|
|
|
static inline Bool
|
|
list_is_empty(struct list *head)
|
|
{
|
|
return head->next == head;
|
|
}
|
|
|
|
#ifndef container_of
|
|
#define container_of(ptr, type, member) \
|
|
(type *)((char *)(ptr) - (char *) &((type *)0)->member)
|
|
#endif
|
|
|
|
#define list_entry(ptr, type, member) \
|
|
container_of(ptr, type, member)
|
|
|
|
#define list_first_entry(ptr, type, member) \
|
|
list_entry((ptr)->next, type, member)
|
|
|
|
#define __container_of(ptr, sample, member) \
|
|
(void *)((char *)(ptr) \
|
|
- ((char *)&(sample)->member - (char *)(sample)))
|
|
|
|
#define list_for_each_entry(pos, head, member) \
|
|
for (pos = __container_of((head)->next, pos, member); \
|
|
&pos->member != (head); \
|
|
pos = __container_of(pos->member.next, pos, member))
|
|
|
|
#endif
|