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/*
* OMAP3 ISP library - Double linked lists
*
* Copyright (C) 2010-2011 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __LIST_H
#define __LIST_H
#include <stddef.h>
struct list_entry {
struct list_entry *prev;
struct list_entry *next;
};
static inline void list_init(struct list_entry *list)
{
list->next = list;
list->prev = list;
}
static inline void list_append(struct list_entry *entry, struct list_entry *list)
{
entry->next = list;
entry->prev = list->prev;
list->prev->next = entry;
list->prev = entry;
}
static inline void list_prepend(struct list_entry *entry, struct list_entry *list)
{
entry->next = list->next;
entry->prev = list;
list->next->prev = entry;
list->next = entry;
}
#define list_entry(entry, type, member) \
(type *)((char *)(entry) - offsetof(type, member))
#define list_for_each(entry, list) \
for (entry = (list)->next; entry != (list); entry = entry->next)
#define list_for_each_entry(entry, list, member) \
for (entry = list_entry((list)->next, typeof(*entry), member); \
&entry->member != (list); \
entry = list_entry(entry->member.next, typeof(*entry), member))
#define list_for_each_safe(entry, __next, list) \
for (entry = (list)->next, __next = entry->next; entry != (list); \
entry = __next, __next = entry->next)
#define list_for_each_entry_safe(entry, __next, list, member) \
for (entry = list_entry((list)->next, typeof(*entry), member), \
__next = list_entry(entry->member.next, typeof(*entry), member); \
&entry->member != (list); \
entry = __next, __next = list_entry(entry->member.next, typeof(*entry), member))
#endif /* __LIST_H */
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