mirror of
https://github.com/sheumann/hush.git
synced 2024-08-17 00:29:03 +00:00
74 lines
2.3 KiB
C
74 lines
2.3 KiB
C
/* vi: set sw=4 ts=4: */
|
|
#if !defined(_BLKID_LIST_H) && !defined(LIST_HEAD)
|
|
#define _BLKID_LIST_H
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/*
|
|
* Simple doubly linked list implementation.
|
|
*
|
|
* Some of the internal functions ("__xxx") are useful when
|
|
* manipulating whole lists rather than single entries, as
|
|
* sometimes we already know the next/prev entries and we can
|
|
* generate better code by using them directly rather than
|
|
* using the generic single-entry routines.
|
|
*/
|
|
|
|
struct list_head {
|
|
struct list_head *next, *prev;
|
|
};
|
|
|
|
#define LIST_HEAD_INIT(name) { &(name), &(name) }
|
|
|
|
#define LIST_HEAD(name) \
|
|
struct list_head name = LIST_HEAD_INIT(name)
|
|
|
|
#define INIT_LIST_HEAD(ptr) do { \
|
|
(ptr)->next = (ptr); (ptr)->prev = (ptr); \
|
|
} while (0)
|
|
|
|
void __list_add(struct list_head * add, struct list_head * prev, struct list_head * next);
|
|
void list_add(struct list_head *add, struct list_head *head);
|
|
void list_add_tail(struct list_head *add, struct list_head *head);
|
|
void __list_del(struct list_head * prev, struct list_head * next);
|
|
void list_del(struct list_head *entry);
|
|
void list_del_init(struct list_head *entry);
|
|
int list_empty(struct list_head *head);
|
|
void list_splice(struct list_head *list, struct list_head *head);
|
|
|
|
/**
|
|
* list_entry - get the struct for this entry
|
|
* @ptr: the &struct list_head pointer.
|
|
* @type: the type of the struct this is embedded in.
|
|
* @member: the name of the list_struct within the struct.
|
|
*/
|
|
#define list_entry(ptr, type, member) \
|
|
((type *)((char *)(ptr)-(unsigned long)(&((type *)0)->member)))
|
|
|
|
/**
|
|
* list_for_each - iterate over elements in a list
|
|
* @pos: the &struct list_head to use as a loop counter.
|
|
* @head: the head for your list.
|
|
*/
|
|
#define list_for_each(pos, head) \
|
|
for (pos = (head)->next; pos != (head); pos = pos->next)
|
|
|
|
/**
|
|
* list_for_each_safe - iterate over elements in a list, but don't dereference
|
|
* pos after the body is done (in case it is freed)
|
|
* @pos: the &struct list_head to use as a loop counter.
|
|
* @pnext: the &struct list_head to use as a pointer to the next item.
|
|
* @head: the head for your list (not included in iteration).
|
|
*/
|
|
#define list_for_each_safe(pos, pnext, head) \
|
|
for (pos = (head)->next, pnext = pos->next; pos != (head); \
|
|
pos = pnext, pnext = pos->next)
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _BLKID_LIST_H */
|