"ocaml_beginners"::[] Re: What is the typical way for handling incoming data by signal?

Richard Jones <richannexia.org> writes:
> The second thread will wake up only when the data
arrives.  The rest
> of the time it will be completely quiescent.
Do you mean if the slave thread is blocked by some IO
operation such as
Unix.read then it won't be so active ?  Then how about the
following cases
with Unix.select?

 - Unix.select with a negative waiting period, i.e. always
wait
   (Should it be considered some kind of blocking ?)

 - Unix.select with a positive waiting period, and inside a
loop kept running
   (I guess this should be considered as active)

Beside, about Unix.select, another puzzling problem for me:
during the period
of waiting, is it possible that some file_descr are
initially available for
read(write) and then turns unavailable soon (e.g. operated
by other process),
then are they included in the return fd list?

-code17



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