[Python-Dev] Remove own implementation for thread-local storage

Victor Stinner victor.stinner at gmail.com
Mon Jul 3 04:07:06 EDT 2017

I'm in favor of removing it. I know that it confused people many
times, they look at this fallback and found an issue, whereas I'm not
aware of any platform using this fallback anymore.

Can you please write a PR just to remove this fallback? We can merge
it and then check buildbots :-) So in the worst case, we can revert


2017-07-03 9:32 GMT+02:00 Masayuki YAMAMOTO <ma3yuki.8mamo10 at gmail.com>:
> Hi, python-dev.
> I'd propose removing code which I think out-of-date.
> CPython has provided the own implementation for thread-local storage (TLS)
> on Python/thread.c, it's used in the case which a platform has not supplied
> native TLS.  However, currently all supported platforms (NT and pthreads)
> have provided native TLS and defined the Py_HAVE_NATIVE_TLS macro with
> unconditional in any case.
> If the code is removed, the new TLS API for PEP 539 won't have to care the
> reinitialization of the thread keys managed by the interpreter (i.e.
> PyThread_ReInitTLS function has been working for own implementation and will
> be no longer necessary for new API).  Does anyone have a reason we should
> keep it?
> Regards,
> Masayuki
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