[3.14] gh-140061: Use _PyObject_IsUniquelyReferenced() to check if objects are uniquely referenced (gh-140062)#140157
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colesbury merged 1 commit intopython:3.14from Oct 15, 2025
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…bjects are uniquely referenced (pythongh-140062) The previous `Py_REFCNT(x) == 1` checks can have data races in the free threaded build. `_PyObject_IsUniquelyReferenced(x)` is a more conservative check that is safe in the free threaded build and is identical to `Py_REFCNT(x) == 1` in the default GIL-enabled build. (cherry picked from commit 32c2649) Co-authored-by: Sergey Miryanov <sergey.miryanov@gmail.com>
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The previous
Py_REFCNT(x) == 1checks can have data races in the freethreaded build.
_PyObject_IsUniquelyReferenced(x)is a more conservativecheck that is safe in the free threaded build and is identical to
Py_REFCNT(x) == 1in the default GIL-enabled build.(cherry picked from commit 32c2649)
Co-authored-by: Sergey Miryanov sergey.miryanov@gmail.com
Py_REFCNT(x) == 1for free-threaded compatibility #140061