I like to say that in NIFs (and port drivers) all the bets are off anyway, most notably process isolation and fault-tolerance. The guarantees such as "preemptio

I like to say that in NIFs (and port drivers) all the bets are off anyway, most notably process isolation and fault-tolerance. The guarantees such as "preemption" and fault-tolerance happen in the layer above (i.e. pure Erlang), and can only be satisfied if the underlying layer behaves properly.