X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=urcu%2Fhlist.h;fp=urcu%2Fhlist.h;h=d2e2ec38e2304f24e8ad86c18389e7faf3154508;hb=9f446823a2f64fbc9b9af984dc797c73f4107310;hp=9f4332ac87d9afd33e48e5de6dcd3c4a96d5da88;hpb=98f483d24f69785a7fb2e988f1053c34e84a4e61;p=userspace-rcu.git

diff --git a/urcu/hlist.h b/urcu/hlist.h
index 9f4332a..d2e2ec3 100644
--- a/urcu/hlist.h
+++ b/urcu/hlist.h
@@ -43,6 +43,16 @@ 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,