We can obtain the ORBInitializer registry throug the ORB or through PortableInterceptor::register_orb_initializer. When going through the ORB the orb lock is hold during the loading of the PI library, when going through the register_orb_initializer the static object lock is hold. This could lead to a double load, the ORB should also do a double checked locking on the static lock to my idea. Any other ideas?

In the ORB:
  ACE_GUARD_RETURN (TAO_SYNCH_MUTEX, mon, this->lock_,
                    0);


In PI:
      ACE_MT (ACE_GUARD (TAO_SYNCH_RECURSIVE_MUTEX,
                         guard,
                         *ACE_Static_Object_Lock::instance ()));