default to gil_used = false
#5564
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ngoldbaum
approved these changes
Oct 27, 2025
| A module can opt-out of supporting free-threaded Python until it has audited its `unsafe` code for correctness by declaring the module with `#[pymodule(gil_used = true)]` (see below). | ||
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| More complicated `#[pyclass]` types may need to deal with thread-safety directly; there is [a dedicated section of the guide](./class/thread-safety.md) to discuss this. | ||
| Complicated `#[pyclass]` types may need to deal with thread-safety directly; there is [a dedicated section of the guide](./class/thread-safety.md) to discuss this. |
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Want me to go over these docs once more to see if they still make sense with the new default?
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Keeping docs fresh is always much appreciated! I think I got everything but will never say no to another pair of eyes 😄
Co-authored-by: Nathan Goldbaum <nathan.goldbaum@gmail.com>
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Related to #5525 which has switched the default
gil_usedflag tofalseas part of that diff, also default modules created withPyModule::newto not require the GIL. This PR also takes the opportunity to add documentation to the migration guide.