[sane-standard] SANE2: Threading

[m. allan noah]

trying out the sane-standard list...

i would like to have some discussion about threading in sane, specifically 
if removal of threading/forking will adversly affect some of the cheaper 
scanners. i wonder if they are more timing sensitive than the more 
expensive (smarter?) scanners?

note that i am not talking about non-blocking mode. some scanners can 
support that without a background thread, by querying the scanner to see 
if its buffer is full yet. if not, return GOOD, with len = 0.

if we determine to keep the threading/forking support, what about the 
possibility to 'move' this code up one layer, perhaps into the dll 
backend? then we only have to write it once, as opposed to in each 
backend. perhaps a layer between the dll and regular backends?

allan

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"so don't tell us it can't be done, putting down what you don't know.
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