gh-132776: Cleanup for XIBufferViewType (gh-132821)

* add notes
* rename XIBufferViewObject to xibufferview
* move memoryview XIData code to memoryobject.c

1 files changed, 34 insertions, 4 deletions

diff --git a/Python/crossinterp.c b/Python/crossinterp.c
index 094bbbe54f2..7a19cc3da1f 100644
--- a/Python/crossinterp.c
+++ b/Python/crossinterp.c
@@ -1902,7 +1902,25 @@ _PyXI_Fini(PyInterpreterState *interp)
 PyStatus
 _PyXI_InitTypes(PyInterpreterState *interp)
 {
-    if (init_static_exctypes(&_PyXI_GET_STATE(interp)->exceptions, interp) < 0) {
+    if (_Py_IsMainInterpreter(interp)) {
+        _PyXI_global_state_t *global_state = _PyXI_GET_GLOBAL_STATE(interp);
+        if (global_state == NULL) {
+            PyErr_PrintEx(0);
+            return _PyStatus_ERR(
+                    "failed to get global cross-interpreter state");
+        }
+        xid_lookup_init(&global_state->data_lookup);
+    }
+
+    _PyXI_state_t *state = _PyXI_GET_STATE(interp);
+    if (state == NULL) {
+        PyErr_PrintEx(0);
+        return _PyStatus_ERR(
+                "failed to get interpreter's cross-interpreter state");
+    }
+    xid_lookup_init(&state->data_lookup);
+
+    if (init_static_exctypes(&state->exceptions, interp) < 0) {
         PyErr_PrintEx(0);
         return _PyStatus_ERR(
                 "failed to initialize the cross-interpreter exception types");
@@ -1915,9 +1933,21 @@ _PyXI_InitTypes(PyInterpreterState *interp)
 void
 _PyXI_FiniTypes(PyInterpreterState *interp)
 {
-    // We would finalize heap types here too but that leads to ref leaks.
-    // Instead, we finalize them in _PyXI_Fini().
-    fini_static_exctypes(&_PyXI_GET_STATE(interp)->exceptions, interp);
+    _PyXI_state_t *state = _PyXI_GET_STATE(interp);
+    if (state != NULL) {
+        // We would finalize heap types here too but that leads to ref leaks.
+        // Instead, we finalize them in _PyXI_Fini().
+        fini_static_exctypes(&state->exceptions, interp);
+
+        xid_lookup_fini(&state->data_lookup);
+    }
+
+    if (_Py_IsMainInterpreter(interp)) {
+        _PyXI_global_state_t *global_state = _PyXI_GET_GLOBAL_STATE(interp);
+        if (global_state != NULL) {
+            xid_lookup_fini(&global_state->data_lookup);
+        }
+    }
 }