From: ian <ian>
Date: Wed, 14 Jun 2006 16:59:46 +0000 (+0000)
Subject: add DLIST2_PREPEND
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ijackson/git?a=commitdiff_plain;h=17003b2066cf31bba7466f11bbe7228e1c7c4690;p=trains.git

add DLIST2_PREPEND
---

diff --git a/hostside/dliste.h b/hostside/dliste.h
index 72a235c..bade3d4 100644
--- a/hostside/dliste.h
+++ b/hostside/dliste.h
@@ -61,5 +61,13 @@
                  : ((list).head= (node))),		\
     (list).tail= (node)))
 
+#define DLIST2_PREPEND(list,node,link)			\
+  ((void)						\
+   ((node)->link.next= (list).head,			\
+    (node)->link.back= 0,				\
+    ((list).head ? ((list).head->link.back= (node))	\
+                 : ((list).tail= (node))),		\
+    (list).head= (node)))
+
      
 #endif /*DLIST_H*/