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select/3 call equivalent in mzscheme



What's the best way to do a

select(if_list, of_list, exc_list, time_out)

[
which sees if there is any input/output/exceptions on the three file
descriptor lists (if_list, of_list, exc_list), and times out after time_out
(modulo MS-Windows idea of a file_descriptor ;-)
]

call in mzscheme?

thanks

chris

Dr. Chris Wright
Deputy Director, Intensive Care Unit
Monash Medical Centre
Clayton, VIC Australia