From: Ben Pfaff <blp@nicira.com>
Date: Fri, 30 Jan 2009 00:47:03 +0000 (-0800)
Subject: New function list_moved().
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=854f009c80130ce5391612754b7ca3d3b5dd183c;p=openvswitch

New function list_moved().
---

diff --git a/lib/list.c b/lib/list.c
index 8eaf9fe9..89d15f11 100644
--- a/lib/list.c
+++ b/lib/list.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
+/* Copyright (c) 2008, 2009 The Board of Trustees of The Leland Stanford
  * Junior University
  * 
  * We are making the OpenFlow specification and associated documentation
@@ -98,6 +98,14 @@ list_replace(struct list *element, const struct list *position)
     element->prev->next = element;
 }
 
+/* Adjusts pointers around 'list' to compensate for 'list' having been moved
+ * around in memory (e.g. as a consequence of realloc()). */
+void
+list_moved(struct list *list)
+{
+    list->prev->next = list->next->prev = list;
+}
+
 /* Removes 'elem' from its list and returns the element that followed it.
    Undefined behavior if 'elem' is not in a list. */
 struct list *
diff --git a/lib/list.h b/lib/list.h
index 602c549b..7de8548c 100644
--- a/lib/list.h
+++ b/lib/list.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
+/* Copyright (c) 2008, 2009 The Board of Trustees of The Leland Stanford
  * Junior University
  * 
  * We are making the OpenFlow specification and associated documentation
@@ -56,6 +56,7 @@ void list_splice(struct list *before, struct list *first, struct list *last);
 void list_push_front(struct list *, struct list *);
 void list_push_back(struct list *, struct list *);
 void list_replace(struct list *, const struct list *);
+void list_moved(struct list *);
 
 /* List removal. */
 struct list *list_remove(struct list *);