[erlang-questions] driver_output_term, driver_send_term and ei
Thu Aug 30 14:33:52 CEST 2007
It seems that the erl_driver docs recommend using driver_output_term
for efficiency reason.
It seems the difference bewteeen driver_output_term and
driver_send_term is that the former only sends data to the port owner
I noticed that Klacke uses driver_send_term in his posregex linked-in
driver. Would driver_output_term work just as well if the driver was
given the pid of the caller to be given back to the port owner process?
Generally speaking, are there guidelines for when to use each function?
Should I use term_to_binary nowadays to send data to the driver, ei
to decode in the driver and driver_output_term to send back?
P.S. I'm familiar with the FFI in Lisp, Haskell and OCaml. I must
admit that the Erlang FFI seems to be the most pain in the rear of
them all. I think it's also the least efficient when dealing with GUI
APIs like Cocoa on the Mac since data needs to be convert to and from
Erlang binaries and then back to C structures.
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