Driver questions

Sean Hinde <>
Wed Jun 27 20:43:00 CEST 2001


> This is kind of what I thought from the docs but crypto seems 
> to do it a
> little differently.. Here there is a server process which 
> opens the driver,
> "owns" it, and puts the port reference in a 'protected' ets 
> table (i.e. read
> allowed by all). The client functions read this table and call
> erlang:port_command in the context of the *calling* process. 

Hmm, I just made a driver which does both mechanisms and the one which does
port_control in the calling process averages 20uS per call but the one which
uses driver_output averages about 35uS.

- Sean



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