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cpython/Misc/NEWS.d/next/C API/2024-06-21-16-41-21.gh-issu...

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gh-120858: PyDict_Next should not lock the dict (#120859) PyDict_Next no longer locks the dictionary in the free-threaded build. Locking around individual PyDict_Next calls is not sufficient because the function returns borrowed references and because it allows concurrent modifications during the iteraiton loop. The internal locking also interferes with correct external synchronization because it may suspend outer critical sections created by the caller.
2024-06-24 15:15:15 -03:00
:c:func:`PyDict_Next` no longer locks the dictionary in the free-threaded
build. The locking needs to be done by the caller around the entire iteration
loop.