X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;ds=inline;f=urcu%2Fhlist.h;h=15e672bc1702135ddfdb20b5676785dbd3cb2f55;hb=63d2de6a60e9cc108f66f61f0e432741c38f0571;hp=d7d5c87f1c28d1c3710ed1d1bb4a08f0751b3a55;hpb=bdffa73aa208ad5f1e5b3a3cb6cbf86ac6996559;p=userspace-rcu.git

diff --git a/urcu/hlist.h b/urcu/hlist.h
index d7d5c87..15e672b 100644
--- a/urcu/hlist.h
+++ b/urcu/hlist.h
@@ -39,6 +39,15 @@ static inline void  CDS_INIT_HLIST_HEAD(struct cds_hlist_head *ptr)
 #define cds_hlist_entry(ptr, type, member)					\
 	((type *) ((char *) (ptr) - (unsigned long) (&((type *) 0)->member)))
 
+/* Get first entry from a list. Assumes the hlist is not empty. */
+#define cds_hlist_first_entry(ptr, type, member) \
+	cds_list_entry((ptr)->next, type, member)
+
+static inline int cds_hlist_empty(struct cds_hlist_head *head)
+{
+	return !head->next;
+}
+
 /* Add new element at the head of the list.  */
 static inline void cds_hlist_add_head (struct cds_hlist_node *newp,
 				   struct cds_hlist_head *head)