sys/queue.h: add LIST_FOREACH_SAFE

2010-12-20 23:52:53 +00:00 · 2010-12-20 23:52:53 +00:00 · d23c3d110e
commit d23c3d110e
parent 361f377493
1 changed files with 5 additions and 0 deletions
--- a/include/sys/queue.h
+++ b/include/sys/queue.h
@ -166,6 +166,11 @@ struct {								\
 		(var);							\
 		(var) = ((var)->field.le_next))

+#define	LIST_FOREACH_SAFE(var, head, field, tvar)			\
+	for ((var) = LIST_FIRST((head));				\
+		(var) && ((tvar) = LIST_NEXT((var), field), 1);		\
+		(var) = (tvar))
+
 /*
 * List access methods.
 */