public void unregister(PeerControlInstance instance) {
try {
this_mon.enter();
Map<PeerControlInstance, instanceWrapper> new_map =
new HashMap<PeerControlInstance, instanceWrapper>(instance_map);
instanceWrapper wrapper = new_map.remove(instance);
if (wrapper == null) {
Debug.out("instance wrapper not found");
return;
}
wrapper.unregister();
instance_map = new_map;
registrations_changed = true;
} finally {
this_mon.exit();
}
}
