[3.13] gh-135871: Fix needless spinning in _PyMutex_LockTimed with zero timeout (gh-135872)
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pythongh-135872) The free threading build could spin unnecessarily on `_Py_yield()` if the initial compare and swap failed. (cherry picked from commit cbfaf41) Co-authored-by: Joseph Tibbertsma <josephtibbertsma@gmail.com>
_PyMutex_LockTimed with zero timeout (gh-135872)_PyMutex_LockTimed with zero timeout (gh-135872)
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The free threading build could spin unnecessarily on
_Py_yield()if the initial compare and swap failed.(cherry picked from commit cbfaf41)
_PyMutex_LockTimedspins and may fail unnecessarily in no-GIL builds #135871