Hi Sherman, There isn't any mechanism for tracking Referenced::ref()/unref() calls. One could add a observer/callback mechanism to do this, but it'd add an extra if() {} block to all ref()/unref() calls which would be penalize all objects with the overhead, when only a tiny proportion of OSG users might need to this on a small number of their objects.
For this type of functionality I would normally build a proxy object mechanism, where the proxy manages access to the objects data. The other way would be to manage the compress/uncompress functionality at a higher level in your app. Robert. On Thu, Jul 17, 2008 at 5:01 PM, sherman wilcox <[EMAIL PROTECTED]> wrote: > I have a class that derives from osg::Referenced. This class contains > a pointer to a block of compressed data. What I'd like to do is > "automatically" decompress the block of data when the reference count > exceeds a threshold (in this case anything higher than 1). Also, when > the reference count is <= a given threshold (again, anything <= 1) I'd > like this class to compress the data. What I'm not seeing is any way > to hook into the reference counting system to receive notifications > when the count changes. I see that there is a mechanism to notify > "observers" when the object is delete, but this isn't quite what I'm > after. Suggestions? > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org