[Python-Dev] PEP Draft: Simplified Global Interpreter Lock acquisition for extensions

[Brett Cannon]

[Mark Hammond]

> Hi all,
>   Following the thread of a couple of months ago, I have prepared a first
> draft of a PEP.  There is still more detail to be filled in the
> "implementation" area, but I would still like feedback on all other areas.
>

Overall I think it is a good PEP (this is coming from someone with hardly
any extension work under his belt and *no* threading work in C under his
belt).

The only point I would make is that in the discussion of
Py_BEGIN_ALLOW_THREADS does not mention any specific drawbacks about it.
Obviously you can draw some since you state they are macros, but if you
do not pick up on that you might not see what so is bad about other than
you say it is for anything complex.  Might just quickly say that it can't
tell whether the interpreter has started or not just like PyThreadState.

-Brett