From: Nick Mathewson <nickm@torproject.org>
Date: Fri, 23 Apr 2010 18:04:03 +0000 (-0400)
Subject: Add a comment to explain why evdns_request is now separte from request
X-Git-Tag: release-2.0.5-beta~41
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=ceefbe87303c8c96dc809ad8afc736f2dbaa194a;p=libevent

Add a comment to explain why evdns_request is now separte from request
---

diff --git a/evdns.c b/evdns.c
index 3dbe7bea..30269078 100644
--- a/evdns.c
+++ b/evdns.c
@@ -148,7 +148,10 @@ typedef unsigned int uint;
 
 #define CLASS_INET     EVDNS_CLASS_INET
 
-/* persistent handle */
+/* Persistent handle.  We keep this separate from 'struct request' since we
+ * need some object to last for as long as an evdns_request is outstanding so
+ * that it can be cancelled, whereas a search request can lead to multiple
+ * 'struct request' instances being created over its lifetime. */
 struct evdns_request {
 	struct request *current_req;
 
@@ -182,7 +185,7 @@ struct request {
 	char **put_cname_in_ptr; /* store the cname here if we get one. */
 
 	struct evdns_base *base;
-	
+
 	struct evdns_request *handle;
 };