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GH-95245: Move weakreflist into the pre-header. (GH-95996)

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Mark Shannon 2022-08-16 13:57:18 +01:00 • committed by GitHub
parent 829aab8592
commit 5a8c15819c
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6 changed files with 105 additions and 20 deletions
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6
Include/internal/pycore_object.h
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@ -279,7 +279,7 @@ static inline size_t
_PyType_PreHeaderSize(PyTypeObject *tp)
{
return _PyType_IS_GC(tp) * sizeof(PyGC_Head) +
_PyType_HasFeature(tp, Py_TPFLAGS_MANAGED_DICT) * 2 * sizeof(PyObject *);
_PyType_HasFeature(tp, Py_TPFLAGS_PREHEADER) * 2 * sizeof(PyObject *);
}
void _PyObject_GC_Link(PyObject *op);
@ -296,7 +296,7 @@ extern int _Py_CheckSlotResult(
// Test if a type supports weak references
static inline int _PyType_SUPPORTS_WEAKREFS(PyTypeObject *type) {
return (type->tp_weaklistoffset > 0);
return (type->tp_weaklistoffset != 0);
}
extern PyObject* _PyType_AllocNoTrack(PyTypeObject *type, Py_ssize_t nitems);
@ -346,7 +346,7 @@ _PyDictOrValues_SetValues(PyDictOrValues *ptr, PyDictValues *values)
ptr->values = ((char *)values) - 1;
}
#define MANAGED_DICT_OFFSET (((int)sizeof(PyObject *))*-3)
#define MANAGED_WEAKREF_OFFSET (((Py_ssize_t)sizeof(PyObject *))*-4)
extern PyObject ** _PyObject_ComputedDictPointer(PyObject *);
extern void _PyObject_FreeInstanceAttributes(PyObject *obj);