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/*
* netlink/list.h Netlink List Utilities
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation version 2.1
* of the License.
*
* Copyright (c) 2003-2006 Thomas Graf <tgraf@suug.ch>
*/
#ifndef NETLINK_LIST_H_
#define NETLINK_LIST_H_
struct nl_list_head
{
struct nl_list_head * next;
struct nl_list_head * prev;
};
static inline void __nl_list_add(struct nl_list_head *obj,
struct nl_list_head *prev,
struct nl_list_head *next)
{
prev->next = obj;
obj->prev = prev;
next->prev = obj;
obj->next = next;
}
static inline void nl_list_add_tail(struct nl_list_head *obj,
struct nl_list_head *head)
{
__nl_list_add(obj, head->prev, head);
}
static inline void nl_list_add_head(struct nl_list_head *obj,
struct nl_list_head *head)
{
__nl_list_add(obj, head, head->next);
}
static inline void nl_list_del(struct nl_list_head *obj)
{
obj->next->prev = obj->prev;
obj->prev->next = obj->next;
}
static inline int nl_list_empty(struct nl_list_head *head)
{
return head->next == head;
}
#define nl_container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (char *)__mptr - ((size_t) &((type *)0)->member));})
#define nl_list_entry(ptr, type, member) \
nl_container_of(ptr, type, member)
#define nl_list_at_tail(pos, head, member) \
((pos)->member.next == (head))
#define nl_list_at_head(pos, head, member) \
((pos)->member.prev == (head))
#define NL_LIST_HEAD(name) \
struct nl_list_head name = { &(name), &(name) }
#define nl_list_first_entry(head, type, member) \
nl_list_entry((head)->next, type, member)
#define nl_list_for_each_entry(pos, head, member) \
for (pos = nl_list_entry((head)->next, typeof(*pos), member); \
&(pos)->member != (head); \
(pos) = nl_list_entry((pos)->member.next, typeof(*(pos)), member))
#define nl_list_for_each_entry_safe(pos, n, head, member) \
for (pos = nl_list_entry((head)->next, typeof(*pos), member), \
n = nl_list_entry(pos->member.next, typeof(*pos), member); \
&(pos)->member != (head); \
pos = n, n = nl_list_entry(n->member.next, typeof(*n), member))
#define nl_init_list_head(head) \
do { (head)->next = (head); (head)->prev = (head); } while (0)
#endif
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