The reliability of python threads

Paul Rubin http
Thu Jan 25 01:11:07 CET 2007


"Klaas" <mike.klaas at gmail.com> writes:
> POSIX issues aside, Python's threading model should be less susceptible
> to memory-barrier problems that are possible in other languages (this
> is due to the GIL). 

But the GIL is not part of Python's threading model; it's just a
particular implementation artifact.  Programs that rely on it are
asking for trouble.

> Double-checked locking, frinstance, is safe in python even though it
> isn't in java.

What's that?

> Are you ever relying solely on the GIL to access shared data?

I think a lot of programs do that, which is probably unwise in the
long run.



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