From: Mathieu Desnoyers Date: Thu, 6 Dec 2012 21:02:30 +0000 (-0500) Subject: wfcqueue: document first/next return values X-Git-Tag: v0.8.0~129 X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=131a29a6627c8a1aee35491ac43984ebe756909c;p=userspace-rcu.git wfcqueue: document first/next return values Signed-off-by: Mathieu Desnoyers --- diff --git a/urcu/static/wfcqueue.h b/urcu/static/wfcqueue.h index 99643be..4b3535a 100644 --- a/urcu/static/wfcqueue.h +++ b/urcu/static/wfcqueue.h @@ -262,6 +262,8 @@ ___cds_wfcq_first(struct cds_wfcq_head *head, * Used by for-like iteration macros in urcu/wfqueue.h: * __cds_wfcq_for_each_blocking() * __cds_wfcq_for_each_blocking_safe() + * + * Returns NULL if queue is empty, first node otherwise. */ static inline struct cds_wfcq_node * ___cds_wfcq_first_blocking(struct cds_wfcq_head *head, @@ -321,6 +323,9 @@ ___cds_wfcq_next(struct cds_wfcq_head *head, * Used by for-like iteration macros in urcu/wfqueue.h: * __cds_wfcq_for_each_blocking() * __cds_wfcq_for_each_blocking_safe() + * + * Returns NULL if reached end of queue, non-NULL next queue node + * otherwise. */ static inline struct cds_wfcq_node * ___cds_wfcq_next_blocking(struct cds_wfcq_head *head, diff --git a/urcu/wfcqueue.h b/urcu/wfcqueue.h index d9ec534..b6be9f3 100644 --- a/urcu/wfcqueue.h +++ b/urcu/wfcqueue.h @@ -280,6 +280,8 @@ extern enum cds_wfcq_ret __cds_wfcq_splice_nonblocking( * Used by for-like iteration macros: * __cds_wfcq_for_each_blocking() * __cds_wfcq_for_each_blocking_safe() + * + * Returns NULL if queue is empty, first node otherwise. */ extern struct cds_wfcq_node *__cds_wfcq_first_blocking( struct cds_wfcq_head *head, @@ -306,6 +308,9 @@ extern struct cds_wfcq_node *__cds_wfcq_first_nonblocking( * Used by for-like iteration macros: * __cds_wfcq_for_each_blocking() * __cds_wfcq_for_each_blocking_safe() + * + * Returns NULL if reached end of queue, non-NULL next queue node + * otherwise. */ extern struct cds_wfcq_node *__cds_wfcq_next_blocking( struct cds_wfcq_head *head,