From 6e2b3527cc95b92bf136b65fd2ee344d4c879faa Mon Sep 17 00:00:00 2001
From: William Todd Stinson <stinson@lindenlab.com>
Date: Fri, 2 Nov 2012 13:22:48 -0700
Subject: CHUI-475: Ensuring that objects that query the avatar name cache with
 a callback store the connection and disconnect on object destruction.  This
 should help resolve some of the heap corruption we are seeing.

---
 indra/llui/llnotifications.cpp | 24 +++++++++++++++++-------
 indra/llui/llnotifications.h   | 22 ++++++++++++++++++----
 2 files changed, 35 insertions(+), 11 deletions(-)

(limited to 'indra/llui')

diff --git a/indra/llui/llnotifications.cpp b/indra/llui/llnotifications.cpp
index fdd45bd76f..929b7da081 100644
--- a/indra/llui/llnotifications.cpp
+++ b/indra/llui/llnotifications.cpp
@@ -1787,22 +1787,18 @@ std::ostream& operator<<(std::ostream& s, const LLNotification& notification)
 	return s;
 }
 
-//static
-void LLPostponedNotification::lookupName(LLPostponedNotification* thiz,
-										 const LLUUID& id,
+void LLPostponedNotification::lookupName(const LLUUID& id,
 										 bool is_group)
 {
 	if (is_group)
 	{
 		gCacheName->getGroup(id,
 			boost::bind(&LLPostponedNotification::onGroupNameCache,
-				thiz, _1, _2, _3));
+				this, _1, _2, _3));
 	}
 	else
 	{
-		LLAvatarNameCache::get(id,
-			boost::bind(&LLPostponedNotification::onAvatarNameCache,
-				thiz, _1, _2));
+		fetchAvatarName(id);
 	}
 }
 
@@ -1813,6 +1809,20 @@ void LLPostponedNotification::onGroupNameCache(const LLUUID& id,
 	finalizeName(full_name);
 }
 
+void LLPostponedNotification::fetchAvatarName(const LLUUID& id)
+{
+	if (mAvatarNameCacheConnection.connected())
+	{
+		mAvatarNameCacheConnection.disconnect();
+	}
+
+	if (id.notNull())
+	{
+		mAvatarNameCacheConnection = LLAvatarNameCache::get(id,
+			boost::bind(&LLPostponedNotification::onAvatarNameCache, this, _1, _2));
+	}
+}
+
 void LLPostponedNotification::onAvatarNameCache(const LLUUID& agent_id,
 												const LLAvatarName& av_name)
 {
diff --git a/indra/llui/llnotifications.h b/indra/llui/llnotifications.h
index 19b30b8973..c677dfe298 100644
--- a/indra/llui/llnotifications.h
+++ b/indra/llui/llnotifications.h
@@ -87,6 +87,7 @@
 #include <boost/shared_ptr.hpp>
 #include <boost/enable_shared_from_this.hpp>
 #include <boost/type_traits.hpp>
+#include <boost/signals2.hpp>
 
 #include "llevents.h"
 #include "llfunctorregistry.h"
@@ -972,14 +973,15 @@ public:
 		thiz->mParams = params;
 
 		// Avoid header file dependency on llcachename.h
-		lookupName(thiz, id, is_group);
+		thiz->lookupName(id, is_group);
 	}
 
 private:
-	static void lookupName(LLPostponedNotification* thiz, const LLUUID& id, bool is_group);
+	void lookupName(const LLUUID& id, bool is_group);
 	// only used for groups
 	void onGroupNameCache(const LLUUID& id, const std::string& full_name, bool is_group);
 	// only used for avatars
+	void fetchAvatarName(const LLUUID& id);
 	void onAvatarNameCache(const LLUUID& agent_id, const LLAvatarName& av_name);
 	// used for both group and avatar names
 	void finalizeName(const std::string& name);
@@ -990,8 +992,19 @@ private:
 	}
 
 protected:
-	LLPostponedNotification() {}
-	virtual ~LLPostponedNotification() {}
+	LLPostponedNotification()
+		: mParams(),
+		mName(),
+		mAvatarNameCacheConnection()
+	{}
+
+	virtual ~LLPostponedNotification()
+	{
+		if (mAvatarNameCacheConnection.connected())
+		{
+			mAvatarNameCacheConnection.disconnect();
+		}
+	}
 
 	/**
 	 * Abstract method provides possibility to modify notification parameters and
@@ -1002,6 +1015,7 @@ protected:
 
 	LLNotification::Params mParams;
 	std::string mName;
+	boost::signals2::connection mAvatarNameCacheConnection;
 };
 
 // Stores only persistent notifications.
-- 
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