From bf9af3f94014c8155b1a7764fdac381133aa8dd0 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Fri, 2 Jan 2004 17:06:18 +0000
Subject: [PATCH] Added "&& oitr->second.first->referenceCount()<=1" check to
 removeExpiredObjectsInCache so that it only expires objects in the cache that
 have no external reference.

---
 src/osgDB/Registry.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/osgDB/Registry.cpp b/src/osgDB/Registry.cpp
index 3cfef076f..fbfc3b34c 100644
--- a/src/osgDB/Registry.cpp
+++ b/src/osgDB/Registry.cpp
@@ -1813,7 +1813,8 @@ void Registry::removeExpiredObjectsInCache(double expiryTime)
         oitr!=_objectCache.end();
         ++oitr)
     {
-        if (oitr->second.second<=expiryTime)
+        if (oitr->second.second<=expiryTime &&
+            oitr->second.first->referenceCount()<=1)
         {
             // record the filename of the entry to use as key for deleting
             // afterwards/