Add isGILEnabled Java method #218
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cpwright
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Jan 12, 2026
devinrsmith
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Jan 12, 2026
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| // The sys._is_gil_enabled() function is the documented, stable way to check GIL status from both | ||
| // Python code and C extensions in Python 3.13+ free-threaded builds. |
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I don't think this is quite true. The documentation at https://docs.python.org/3/library/sys.html#sys._is_gil_enabled says:
CPython implementation detail: It is not guaranteed to exist in all implementations of Python.
In general, I think the _ prefix in a context like this means it's not part of the stable API.
I do think we should strive to work with other implementations of Python.
That said, as you mention, it's possible that python doesn't provide a stable way to call this from C API yet.
I think we should at least note we'd prefer to call stable C API here, and create a follow-up in the future (/ link to our issue / link to c python issue).
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fixes #217