file: joba.t package: muf status: alpha
getMuqnetIo function is a special-purpose
convenience in support of transparent networking.
It doesn't do anything not otherwise possible,
just encapsulates a commonly needed bit of
functionality in fast C code. It checks that
@$S.muqnetIo is a message stream,
creating it if it is not (this slot is set to
zero in the child process during a fork to
avoid having it shared), resets the stream
to empty, and then returns it.
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