Comment 5 for bug 1112195

Of course, one thing you can't do with the "end" approach is wait on multiple things at once. Like you could with a:
    void mir_wait_for_all(MirWaitHandle **wait_handle);

This is one of Windows' strengths, generalizing the Event concept so you can wait on different types of events. Similar for Unix/Linux if everything you're waiting on is a select'able file descriptor.