X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=urcu%2Fhlist.h;h=15e672bc1702135ddfdb20b5676785dbd3cb2f55;hb=1216b3d282b4b3cb4a515dee30997fd2dc078776;hp=82015b36fa1aa32a795fa556df52f76d9a342121;hpb=1644042068ae8de26c9f6b85dcb2a5cd0b0f7608;p=userspace-rcu.git

diff --git a/urcu/hlist.h b/urcu/hlist.h
index 82015b3..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)
@@ -62,16 +71,16 @@ static inline void cds_hlist_del (struct cds_hlist_node *elem)
 
 #define cds_hlist_for_each_entry(entry, pos, head, member)			\
 	for (pos = (head)->next,					\
-		     entry = cds_hlist_entry(pos, typeof(*entry), member);	\
+		     entry = cds_hlist_entry(pos, __typeof__(*entry), member);	\
 	     pos != NULL;						\
 	     pos = pos->next,					\
-		     entry = cds_hlist_entry(pos, typeof(*entry), member))
+		     entry = cds_hlist_entry(pos, __typeof__(*entry), member))
 
 #define cds_hlist_for_each_entry_safe(entry, pos, p, head, member)		\
 	for (pos = (head)->next,					\
-		     entry = cds_hlist_entry(pos, typeof(*entry), member);	\
+		     entry = cds_hlist_entry(pos, __typeof__(*entry), member);	\
 	     (pos != NULL) && ({ p = pos->next; 1;});			\
 	     pos = p,							\
-		     entry = cds_hlist_entry(pos, typeof(*entry), member))
+		     entry = cds_hlist_entry(pos, __typeof__(*entry), member))
 
 #endif	/* _KCOMPAT_HLIST_H */