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list.h
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/******************************************************************************
*******************************************************************************
**
** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
** Copyright (C) 2004 Red Hat, Inc. All rights reserved.
**
** This copyrighted material is made available to anyone wishing to use,
** modify, copy, or redistribute it subject to the terms and conditions
** of the GNU General Public License v.2.
**
*******************************************************************************
******************************************************************************/
#ifndef __list_h__
#define __list_h__
struct list
{
struct list *next, *prev;
};
typedef struct list list_t;
#define list_decl(var) list_t var = { &var, &var }
#define list_empty(var) ((var)->next == (var))
#define list_entry(var, type, mem) ((type *)((unsigned long)(var) - (unsigned long)(&((type *)NULL)->mem)))
#define list_init(head) \
do \
{ \
list_t *list_var = (head); \
list_var->next = list_var->prev = list_var; \
} \
while (0)
#define list_add(new, head) \
do \
{ \
list_t *list_var_new = (new); \
list_t *list_var_head = (head); \
list_var_new->next = list_var_head->next; \
list_var_new->prev = list_var_head; \
list_var_head->next->prev = list_var_new; \
list_var_head->next = list_var_new; \
} \
while (0)
#define list_add_next list_add
#define list_add_prev(new, head) \
do \
{ \
list_t *list_var_new = (new); \
list_t *list_var_head = (head); \
list_var_new->prev = list_var_head->prev; \
list_var_new->next = list_var_head; \
list_var_head->prev->next = list_var_new; \
list_var_head->prev = list_var_new; \
} \
while (0)
#define list_del(var) \
do \
{ \
list_t *list_var = (var); \
list_var->next->prev = list_var->prev; \
list_var->prev->next = list_var->next; \
} \
while (0)
#define list_del_init(var) \
do \
{ \
list_t *list_var = (var); \
list_var->next->prev = list_var->prev; \
list_var->prev->next = list_var->next; \
list_var->next = list_var->prev = list_var; \
} \
while (0)
#define list_foreach(tmp, head) \
for ((tmp) = (head)->next; (tmp) != (head); (tmp) = (tmp)->next)
#define list_foreach_safe(tmp, head, x) \
for ((tmp) = (head)->next, (x) = (tmp)->next; \
(tmp) != (head); \
(tmp) = (x), (x) = (x)->next)
#endif /* __OSI_LIST_DOT_H__ */

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