From 0373e754d62aae0a5052a1eded4b9c988f7f8095 Mon Sep 17 00:00:00 2001
From: Bosko Milekic <bmilekic@FreeBSD.org>
Date: Wed, 13 Aug 2003 18:37:25 +0000
Subject: [PATCH] Add LIST_FOREACH_SAFE, which is like LIST_FOREACH but allows
 you to walk the list and remove the current item and destroy/free it.

Alexander Kabaev will likely do the equivalent for the other list
types, but I just happened to have this one sitting in a local
non-FreeBSD tree already.
---
 sys/sys/queue.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/sys/sys/queue.h b/sys/sys/queue.h
index 63012d47da07..a06f0847b12d 100644
--- a/sys/sys/queue.h
+++ b/sys/sys/queue.h
@@ -325,6 +325,13 @@ struct {								\
 	    (var);							\
 	    (var) = LIST_NEXT((var), field))
 
+#define LIST_FOREACH_SAFE(var, head, field, tvar)			\
+	for ((var) = LIST_FIRST((head)),				\
+	    (var) != NULL ? (tvar) = LIST_NEXT((var), field) : NULL;	\
+	    (var) != NULL;						\
+	    (var) = (tvar),						\
+	    (var) != NULL ? (tvar) = LIST_NEXT((var), field) : NULL)
+
 #define	LIST_INIT(head) do {						\
 	LIST_FIRST((head)) = NULL;					\
 } while (0)