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kolibrios/drivers/old/agp/link.h
Sergey Semyonov (Serge) 007ea344db move old agp driver
git-svn-id: svn://kolibrios.org@1405 a494cfbc-eb01-0410-851d-a64ba20cac60
2010-02-12 17:41:37 +00:00

61 lines
1.2 KiB
C

typedef struct link
{
struct link *prev;
struct link *next;
}link_t;
#define LIST_INITIALIZE(name) \
link_t name = { .prev = &name, .next = &name }
#define list_get_instance(link, type, member) \
((type *)(((u8_t *)(link)) - ((u8_t *)&(((type *)NULL)->member))))
static inline void link_initialize(link_t *link)
{
link->prev = NULL;
link->next = NULL;
}
static inline void list_initialize(link_t *head)
{
head->prev = head;
head->next = head;
}
static inline void list_append(link_t *link, link_t *head)
{
link->prev = head->prev;
link->next = head;
head->prev->next = link;
head->prev = link;
}
static inline void list_remove(link_t *link)
{
link->next->prev = link->prev;
link->prev->next = link->next;
link_initialize(link);
}
static inline Bool list_empty(link_t *head)
{
return head->next == head ? TRUE : FALSE;
}
static inline void list_prepend(link_t *link, link_t *head)
{
link->next = head->next;
link->prev = head;
head->next->prev = link;
head->next = link;
}
static inline list_insert(link_t *new, link_t *old)
{
new->prev = old->prev;
new->next = old;
new->prev->next = new;
old->prev = new;
}