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gh-94673: Add Per-Interpreter tp_weaklist for Static Builtin Types (#95302)

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* Store tp_weaklist on the interpreter state for static builtin types.

* Factor out _PyStaticType_GET_WEAKREFS_LISTPTR().

* Add _PyStaticType_ClearWeakRefs().

* Add a comment about how _PyStaticType_ClearWeakRefs() loops.

* Document the change.

* Update Doc/whatsnew/3.12.rst

* Fix a typo.
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Eric Snow 2022-07-28 19:23:47 -06:00 • committed by GitHub
parent 6e44bf9558
commit 3e7cad3bca
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7 changed files with 59 additions and 1 deletions
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6
Include/internal/pycore_object.h
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@ -220,6 +220,12 @@ extern void _Py_PrintReferenceAddresses(FILE *);
static inline PyObject **
_PyObject_GET_WEAKREFS_LISTPTR(PyObject *op)
{
if (PyType_Check(op) &&
((PyTypeObject *)op)->tp_flags & _Py_TPFLAGS_STATIC_BUILTIN) {
static_builtin_state *state = _PyStaticType_GetState(
(PyTypeObject *)op);
return _PyStaticType_GET_WEAKREFS_LISTPTR(state);
}
Py_ssize_t offset = Py_TYPE(op)->tp_weaklistoffset;
return (PyObject **)((char *)op + offset);
}