Basic threading questions
jason at jorendorff.com
Mon Dec 31 23:15:12 CET 2001
John Lull wrote:
> I would assume that all built-in functions, and all methods of
> all built-in types, are implemented as C functions rather than
> compiling to sequences of interpreter byte-codes.
Pretty much, yes.
> They should therefore be effectively atomic if they don't use
> blocking system services. Is that a good assumption?
Yes, mostly. One exception:
Quite apart "blocking system services", a function that
performs long-running number-crunching might render itself
non-atomic, to give other threads a chance to run. (I don't
think there are any examples of this in the standard library.)
> Which built-in operations are blocking should be pretty obvious
> from either the documentation or the basic nature of the operation.
> Are there any non-obvious blocking built-in operations?
None that I can think of.
## Jason Orendorff http://www.jorendorff.com/
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