e it does know that, it knows that all B-held object handles have been dropped &ndash; which is what we want. (It would be possible for B user to indicate it some other way &ndash; another API call, short of destruction &ndash; but that seems unnecessarily complex/precious. If the session is finished, then there's no reason to keep the <code><a class="el" href="classipc_1_1session_1_1Session.html" title="A documentation-only concept defining the local side of an IPC conversation (session) with another en...