BPI/sunxi-tools
5
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

sunxi-tools.h: add list_insert() and list_next() helpers

Browse Source
This commit is contained in:
Alejandro Mery 2012-05-06 23:24:57 +02:00
parent 25e78f0c2a
commit 05846bc397
1 changed files with 22 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
sunxi-tools.h
View File

@ -47,14 +47,21 @@ static inline void list_init(struct list_entry *self)
self->prev = self->next = self;
}
/** appends a list hook @l1 at the end of the list @l0 */
static inline void list_append(struct list_entry *l0, struct list_entry *l1)
/** puts an entry between two other on a list */
static inline void list_inject(struct list_entry *l,
struct list_entry *prev,
struct list_entry *next)
{
l1->next = l0;
l1->prev = l0->prev;
l0->prev = l1;
l->prev = prev;
l->next = next;
next->prev = l;
prev->next = l;
}
#define list_insert(H, E) list_inject((E), (H), (H)->next)
#define list_append(H, E) list_inject((E), (H)->prev, (H))
/** removes an entry for the list where it's contained */
static inline void list_remove(struct list_entry *l)
{
@ -63,16 +70,23 @@ static inline void list_remove(struct list_entry *l)
prev->next = next;
}
/** returns first element of a list */
static inline struct list_entry *list_first(struct list_entry *l)
{
return (l->next == l) ? NULL : l->next;
}
/** returns last element of a list */
static inline struct list_entry *list_last(struct list_entry *l)
{
return (l->prev == l) ? NULL : l->prev;
}
/** returns first element of a list */
static inline struct list_entry *list_first(struct list_entry *l)
/** returns next element on a list */
static inline struct list_entry *list_next(struct list_entry *l,
struct list_entry *e)
{
return (l->next == l) ? NULL : l->next;
return (e->next == l) ? NULL : e->next;
}
/** is list empty? */