检测何时将对象传递给C ++中的新线程？

I have an object for which I'd like to track the number of threads that reference it. In general, when any method on the object is called I can check a thread local boolean value to determine whether the count has been updated for the current thread. But this doesn't help me if the user say, uses boost::bind to bind my object to a boost::function and uses that to start a boost::thread. The new thread will have a reference to my object, and may hold on to it for an indefinite period of time before calling any of its methods, thus leading to a stale count. I could write my own wrapper around boost::thread to handle this, but that doesn't help if the user boost::bind's an object I have an object for which I'd like to track th