On 2020-04-21 11:01, Antoine Pitrou wrote:
On Mon, 20 Apr 2020 19:21:21 -0600
Eric Snow <ericsnowcurren...@gmail.com> wrote:
Honest question: how many C extensions have process-global state that
will cause problems under subinterpreters? In other words, how many
already break in mod_wsgi?
A slightly tricky question is what happens if a PyObject survives
longer than the subinterpreter that created it.
For example, in PyArrow, we allow passing a Python buffer-like object
as a C++ buffer to C++ APIs. The C++ buffer could conceivably be kept
around by C++ code for some time. When the C++ buffer is destroyed,
Py_DECREF() is called on the Python object (I figure that we would have
to switch to the future interpreter-aware PyGILState API -- when will
it be available?).
But what happens if the interpreter which created
the Python object is already destroyed at this point?
That's a good question. What happens today if someone calls Py_Finalize
while the buffer is still around?
I don't think you need to treat *sub*interpreters specially.
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