gh-94673: Hide Objects in PyTypeObject Behind Accessors (gh-104074)

This makes it much cleaner to move more PyTypeObject fields to PyInterpreterState.

2 files changed, 14 insertions, 6 deletions

diff --git a/Include/internal/pycore_object.h b/Include/internal/pycore_object.h
index 2ee0180..91853ad 100644
--- a/Include/internal/pycore_object.h
+++ b/Include/internal/pycore_object.h
@@ -331,10 +331,6 @@ extern int _Py_CheckSlotResult(
     const char *slot_name,
     int success);
 
-// PyType_Ready() must be called if _PyType_IsReady() is false.
-// See also the Py_TPFLAGS_READY flag.
-#define _PyType_IsReady(type) ((type)->tp_dict != NULL)
-
 // Test if a type supports weak references
 static inline int _PyType_SUPPORTS_WEAKREFS(PyTypeObject *type) {
     return (type->tp_weaklistoffset != 0);
@@ -392,8 +388,6 @@ _PyDictOrValues_SetValues(PyDictOrValues *ptr, PyDictValues *values)
 extern PyObject ** _PyObject_ComputedDictPointer(PyObject *);
 extern void _PyObject_FreeInstanceAttributes(PyObject *obj);
 extern int _PyObject_IsInstanceDictEmpty(PyObject *);
-extern int _PyType_HasSubclasses(PyTypeObject *);
-extern PyObject* _PyType_GetSubclasses(PyTypeObject *);
 
 // Access macro to the members which are floating "behind" the object
 static inline PyMemberDef* _PyHeapType_GET_MEMBERS(PyHeapTypeObject *etype) {
diff --git a/Include/internal/pycore_typeobject.h b/Include/internal/pycore_typeobject.h
index 5bd0473..f865e51 100644
--- a/Include/internal/pycore_typeobject.h
+++ b/Include/internal/pycore_typeobject.h
@@ -109,6 +109,20 @@ extern static_builtin_state * _PyStaticType_GetState(PyInterpreterState *, PyTyp
 extern void _PyStaticType_ClearWeakRefs(PyInterpreterState *, PyTypeObject *type);
 extern void _PyStaticType_Dealloc(PyInterpreterState *, PyTypeObject *);
 
+PyAPI_FUNC(PyObject *) _PyType_GetDict(PyTypeObject *);
+extern PyObject * _PyType_GetBases(PyTypeObject *type);
+extern PyObject * _PyType_GetMRO(PyTypeObject *type);
+extern PyObject* _PyType_GetSubclasses(PyTypeObject *);
+extern int _PyType_HasSubclasses(PyTypeObject *);
+
+// PyType_Ready() must be called if _PyType_IsReady() is false.
+// See also the Py_TPFLAGS_READY flag.
+static inline int
+_PyType_IsReady(PyTypeObject *type)
+{
+    return _PyType_GetDict(type) != NULL;
+}
+
 PyObject *
 _Py_type_getattro_impl(PyTypeObject *type, PyObject *name, int *suppress_missing_attribute);
 PyObject *