Method removeUnreferencedObjectsInCache

components/resource/multiobjectcache.cpp:9–34

namespace Resource
{
    void MultiObjectCache::removeUnreferencedObjectsInCache()
    {
        std::vector<osg::ref_ptr<osg::Object>> objectsToRemove;
        {
            std::lock_guard<std::mutex> lock(_objectCacheMutex);

            // Remove unreferenced entries from object cache
            ObjectCacheMap::iterator oitr = _objectCache.begin();
            while (oitr != _objectCache.end())
            {
                if (oitr->second->referenceCount() <= 1)
                {
                    objectsToRemove.push_back(oitr->second);
                    _objectCache.erase(oitr++);
                    ++mExpired;
                }
                else
                {
                    ++oitr;
                }
            }
        }

        // note, actual unref happens outside of the lock
        objectsToRemove.clear();
    }

    void MultiObjectCache::clear()
    {