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#ifndef LIST_H
#define LIST_H
/* Doubly linked lists */
typedef struct link_t link_t;
struct link_t
{
link_t *next;
link_t *prev;
};
typedef struct list_t list_t;
struct list_t
{
link_t *head;
link_t *tail;
};
static inline void
list_init (list_t *list)
{
list->head = (link_t *)list;
list->tail = (link_t *)list;
}
static inline void
list_prepend (list_t *list, link_t *link)
{
link->next = list->head;
link->prev = (link_t *)list;
list->head->prev = link;
list->head = link;
}
static inline void
list_append (list_t *list, link_t *link)
{
link->prev = list->tail;
link->next = (link_t *)list;
list->tail->next = link;
list->tail = link;
}
static inline void
list_unlink (link_t *link)
{
link->prev->next = link->next;
link->next->prev = link->prev;
}
static inline int
list_is_empty (list_t *list)
{
return list->head == (link_t *)list;
}
static inline void
list_move_to_front (list_t *list, link_t *link)
{
list_unlink (link);
list_prepend (list, link);
}
#define LIST_FOREACH(list, link) \
for ((link) = (list)->head; \
(link) != (link_t *)(list); \
(link) = (link)->next)
#if defined(__GNUC__) && __GNUC__ >= 4
# define OFFSET_OF(type, member) \
((unsigned long)__builtin_offsetof(type, member))
#else
# define OFFSET_OF(type, member) \
((unsigned long)(&(((type *)0)->member))
#endif
#define CONTAINER_OF(type, member, data) \
((type *)(((uint8_t *)data) - OFFSET_OF(type, member)))
#endif
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