diff options
Diffstat (limited to 'libglusterfs/src/list.h')
| -rw-r--r-- | libglusterfs/src/list.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/libglusterfs/src/list.h b/libglusterfs/src/list.h index 894fa3012cf..a860275a91e 100644 --- a/libglusterfs/src/list.h +++ b/libglusterfs/src/list.h @@ -191,6 +191,29 @@ list_is_singular(struct list_head *head) return !list_empty(head) && (head->next == head->prev); } +/** + * list_replace - replace old entry by new one + * @old : the element to be replaced + * @new : the new element to insert + * + * If @old was empty, it will be overwritten. + */ +static inline void list_replace(struct list_head *old, + struct list_head *new) +{ + new->next = old->next; + new->next->prev = new; + new->prev = old->prev; + new->prev->next = new; +} + +static inline void list_replace_init(struct list_head *old, + struct list_head *new) +{ + list_replace(old, new); + INIT_LIST_HEAD(old); +} + #define list_entry(ptr, type, member) \ ((type *)((char *)(ptr)-(unsigned long)(&((type *)0)->member))) |