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

Masayuki YAMAMOTO ma3yuki.8mamo10 at gmail.com
Mon Jul 3 03:32:51 EDT 2017

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I'd propose removing code which I think out-of-date.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?

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