[3.13] gh-128759: Fix accesses to tp_version_tag. (GH-129750)
#130042
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…29750) We should use a relaxed atomic load in the free threading build in `PyType_Modified()` because that's called without the type lock held. It's not necessary to use atomics in `type_modified_unlocked()`. We should also use `FT_ATOMIC_STORE_UINT_RELAXED()` instead of the `UINT32` variant because `tp_version_tag` is declared as `unsigned int`. (cherry picked from commit 57f45ee) Co-authored-by: Sam Gross <colesbury@gmail.com>
kumaraditya303
approved these changes
Feb 12, 2025
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We should use a relaxed atomic load in the free threading build in
PyType_Modified()because that's called without the type lock held. It's not necessary to use atomics intype_modified_unlocked().We should also use
FT_ATOMIC_STORE_UINT_RELAXED()instead of theUINT32variant becausetp_version_tagis declared asunsigned int.(cherry picked from commit 57f45ee)