void ResourceManagerBase::unload(Resource& resource)
	{
		if(0 == resource.remRef())
		{
			resource.doUnload();
		}
	}
	void ResourceManagerBase::reload(Resource& resource)
	{
		resource.doUnload();
		resource.doLoad();
	}
	void ResourceManagerBase::forceUnload(Resource& resource)
	{
		resource.doUnload();
		resource.m_ref_count = 0;
	}