From: Mark Spencer <markster@digium.com>
Date: Tue, 4 Apr 2006 05:53:48 +0000 (+0000)
Subject: Does nobody know how to write a linked list properly? I mean seriously!
X-Git-Tag: 1.4.0-beta1~2169
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f11fb652624802eaeb8f8539733d326b246c6aab;p=thirdparty%2Fasterisk.git

Does nobody know how to write a linked list properly? I mean seriously!


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@17183 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---

diff --git a/include/asterisk/linkedlists.h b/include/asterisk/linkedlists.h
index 610f8085b7..8bff72e3fa 100644
--- a/include/asterisk/linkedlists.h
+++ b/include/asterisk/linkedlists.h
@@ -478,11 +478,13 @@ struct {								\
 			(head)->last = NULL;			\
 	} else {								\
 		typeof(elm) curelm = (head)->first;			\
-		while (curelm->field.next != (elm))			\
+		while (curelm && (curelm->field.next != (elm)))			\
 			curelm = curelm->field.next;			\
-		curelm->field.next = (elm)->field.next;			\
-		if ((head)->last == (elm))				\
-			(head)->last = curelm;				\
+		if (curelm) { \
+			curelm->field.next = (elm)->field.next;			\
+			if ((head)->last == (elm))				\
+				(head)->last = curelm;				\
+		} \
 	}								\
 } while (0)