X-Git-Url: http://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=urcu%2Frculist.h;h=a177f20dbf67edab2e666051b7682700def6d7db;hp=3604a96d0619d082ef7c3c2d46a4cff421c04c2e;hb=e6decba5437e56b138c5f42f7560533b9244bb7b;hpb=b45f263b7f87f8f0ce1e6659021688a55595f701 diff --git a/urcu/rculist.h b/urcu/rculist.h index 3604a96..a177f20 100644 --- a/urcu/rculist.h +++ b/urcu/rculist.h @@ -29,9 +29,9 @@ #include #include -/* Add new element at the head of the list. - */ -static inline void cds_list_add_rcu(struct cds_list_head *newp, struct cds_list_head *head) +/* Add new element at the head of the list. */ +static inline +void cds_list_add_rcu(struct cds_list_head *newp, struct cds_list_head *head) { newp->next = head->next; newp->prev = head; @@ -40,9 +40,13 @@ static inline void cds_list_add_rcu(struct cds_list_head *newp, struct cds_list_ head->next = newp; } -/* replace an old entry atomically. +/* + * Replace an old entry atomically with respect to concurrent RCU + * traversal. Mutual exclusion against concurrent updates is required + * though. */ -static inline void cds_list_replace_rcu(struct cds_list_head *old, struct cds_list_head *_new) +static inline +void cds_list_replace_rcu(struct cds_list_head *old, struct cds_list_head *_new) { _new->next = old->next; _new->prev = old->prev; @@ -51,7 +55,8 @@ static inline void cds_list_replace_rcu(struct cds_list_head *old, struct cds_li } /* Remove element from list. */ -static inline void cds_list_del_rcu(struct cds_list_head *elem) +static inline +void cds_list_del_rcu(struct cds_list_head *elem) { elem->next->prev = elem->prev; elem->prev->next = elem->next; @@ -64,15 +69,14 @@ static inline void cds_list_del_rcu(struct cds_list_head *elem) /* Iterate forward over the elements of the list. */ #define cds_list_for_each_rcu(pos, head) \ - for (pos = rcu_dereference((head)->next); pos != (head); \ - pos = rcu_dereference(pos->next)) + for (pos = rcu_dereference((head)->next); pos != (head); \ + pos = rcu_dereference(pos->next)) -/* Iterate through elements of the list. - */ -#define cds_list_for_each_entry_rcu(pos, head, member) \ - for (pos = cds_list_entry(rcu_dereference((head)->next), __typeof__(*pos), member); \ - &pos->member != (head); \ - pos = cds_list_entry(rcu_dereference(pos->member.next), __typeof__(*pos), member)) +/* Iterate through elements of the list. */ +#define cds_list_for_each_entry_rcu(pos, head, member) \ + for (pos = cds_list_entry(rcu_dereference((head)->next), __typeof__(*pos), member); \ + &pos->member != (head); \ + pos = cds_list_entry(rcu_dereference(pos->member.next), __typeof__(*pos), member)) #endif /* _URCU_RCULIST_H */