7.5 Multi-threading

The :thread_policy keyword argument of op:create_poa controls the number of threads created. The value can be one of:

`:single-thread-model`
	Use the same thread for all requests.
`:orb-ctrl-model`	Use an ORB specific number of threads.
An integer `n`	Use `n` threads.

Currently the "ORB specific number of threads" is 1, so this is the same as :single-thread-model.

See the Portable Object Adapter specification, available from OMG.