list.h

LINUX下的mesh路由协议dsr的源代码包

#ifndef _LIST_H
#define _LIST_H

/* Simple linked list inspired by the Linux kernel list implementation */
typedef struct list {
	struct list *prev, *next;
} list_t;

#define LIST_NULL -1
#define LIST_SUCCESS 1

#define LIST_INIT_HEAD(name) { &(name), &(name) }

#define LIST(name) list_t name = LIST_INIT_HEAD(name)

#define INIT_LIST(h) do { \
	(h)->next = (h); (h)->prev = (h); \
} while (0)

#define INIT_LIST_ELM(le) do { \
	(le)->next = NULL; (le)->prev = NULL; \
} while (0)

static inline int listelm_detach(list_t * prev, list_t * next)
{
	next->prev = prev;
	prev->next = next;

	return LIST_SUCCESS;
}

static inline int listelm_add(list_t * le, list_t * prev, list_t * next)
{
	prev->next = le;
	le->prev = prev;
	le->next = next;
	next->prev = le;

	return LIST_SUCCESS;
}

static inline int list_add(list_t * le, list_t * head)
{

	if (!head || !le)
		return LIST_NULL;

	listelm_add(le, head, head->next);

	return LIST_SUCCESS;
}

static inline int list_add_tail(list_t * le, list_t * head)
{

	if (!head || !le)
		return LIST_NULL;

	listelm_add(le, head->prev, head);

	return LIST_SUCCESS;
}

static inline int list_detach(list_t * le)
{
	if (!le)
		return LIST_NULL;

	listelm_detach(le->prev, le->next);

	le->next = le->prev = NULL;

	return LIST_SUCCESS;
}

#define list_for_each(curr, head) \
        for (curr = (head)->next; curr != (head); curr = curr->next)

#define list_for_each_safe(pos, tmp, head) \
        for (pos = (head)->next, tmp = pos->next; pos != (head); \
                pos = tmp, tmp = pos->next)

#define list_empty(head) ((head) == (head)->next)

#define list_first(head) ((head)->next)

#define list_unattached(le) ((le)->next == NULL && (le)->prev == NULL)

#define list_del(le) list_detach(le)

#endif				/* _LIST_H */