bpo-42064: Optimise `sqlite3` state access, part 1 (GH-27273)

Prepare for module state:

- Add "get state by defining class" and "get state by module def" stubs
- Add AC defining class when needed
- Add state pointer to connection context
- Pass state as argument to utility functions

Automerge-Triggered-By: GH:encukou

1 files changed, 13 insertions, 0 deletions

diff --git a/Modules/_sqlite/module.h b/Modules/_sqlite/module.h
index 1344490..a286739 100644
--- a/Modules/_sqlite/module.h
+++ b/Modules/_sqlite/module.h
@@ -65,6 +65,19 @@ extern pysqlite_state pysqlite_global_state;
 static inline pysqlite_state *
 pysqlite_get_state(PyObject *Py_UNUSED(module))
 {
+    return &pysqlite_global_state;  // Replace with PyModule_GetState
+}
+
+static inline pysqlite_state *
+pysqlite_get_state_by_cls(PyTypeObject *Py_UNUSED(cls))
+{
+    return &pysqlite_global_state;  // Replace with PyType_GetModuleState
+}
+
+static inline pysqlite_state *
+pysqlite_get_state_by_type(PyTypeObject *Py_UNUSED(tp))
+{
+    // Replace with _PyType_GetModuleByDef & PyModule_GetState
     return &pysqlite_global_state;
 }