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gh-140138: NOGIL: add atomic owner refcount to PyInterpreterState; finalize on last tstate #140224

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gh-140138: NOGIL: add atomic owner refcount to PyInterpreterState; finalize on last tstate #140224

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115e4d2
fix tsan
ashm-dev Oct 16, 2025
b58d4a1
add blurb
ashm-dev Oct 16, 2025
55b5fe4
Reorder and add `_owners` field
ashm-dev Oct 16, 2025
2aba8ba
Fix typo in interpreter owner atomic variable
ashm-dev Oct 16, 2025
2690fac
Fix news
ashm-dev Oct 16, 2025
e6ff33e
Rename interpreter cleanup functions
ashm-dev Oct 16, 2025
47e51d7
Refactor interpreter cleanup
ashm-dev Oct 16, 2025
37ccb72
Rename _owners to owners in interp struct
ashm-dev Oct 16, 2025
e5c1336
fix
ashm-dev Oct 16, 2025
d08a093
Stop setting `interp->finalizing`
ashm-dev Oct 16, 2025
5001c54
Merge remote-tracking branch 'upstream/main' into gh-140138
ashm-dev Oct 19, 2025
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Rename interpreter cleanup functions 
Rename functions to be more descriptive of their actions.
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@ashm-dev
ashm-dev committed Oct 19, 2025
commit e6ff33e158b67741bd196ec122aa2af0f5cb21fc
10 changes: 5 additions & 5 deletions Python/pystate.c
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Original file line number Diff line number Diff line change
Expand Up @@ -486,19 +486,19 @@ free_interpreter(PyInterpreterState *interp)
}

static void
_finalize_and_free_interpreter(PyInterpreterState *interp)
cleanup_and_free_interpreter(PyInterpreterState *interp)
{
_Py_qsbr_fini(interp);
_PyObject_FiniState(interp);
free_interpreter(interp);
}

static inline void
_interp_release_owner(PyInterpreterState *interp)
release_interp_owner(PyInterpreterState *interp)
{
Py_ssize_t prev = _Py_atomic_add_ssize(&interp->owners, -1);
if (prev == 1) {
_finalize_and_free_interpreter(interp);
cleanup_and_free_interpreter(interp);
}
}

Expand Down Expand Up @@ -975,7 +975,7 @@ PyInterpreterState_Delete(PyInterpreterState *interp)

interp->finalizing = 1;
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_interp_release_owner(interp);
release_interp_owner(interp);
}


Expand Down Expand Up @@ -1441,7 +1441,7 @@ free_threadstate(_PyThreadStateImpl *tstate)
PyMem_RawFree(tstate);
}

_interp_release_owner(interp);
release_interp_owner(interp);
}

static void
Expand Down