bpo-43908: Make heap types converted during 3.10 alpha immutable (GH-26351)

* Make functools types immutable

* Multibyte codec types are now immutable

* pyexpat.xmlparser is now immutable

* array.arrayiterator is now immutable

* _thread types are now immutable

* _csv types are now immutable

* _queue.SimpleQueue is now immutable

* mmap.mmap is now immutable

* unicodedata.UCD is now immutable

* sqlite3 types are now immutable

* _lsprof.Profiler is now immutable

* _overlapped.Overlapped is now immutable

* _operator types are now immutable

* winapi__overlapped.Overlapped is now immutable

* _lzma types are now immutable

* _bz2 types are now immutable

* _dbm.dbm and _gdbm.gdbm are now immutable

1 files changed, 6 insertions, 4 deletions

diff --git a/Modules/_functoolsmodule.c b/Modules/_functoolsmodule.c
index 218a8d1..fa14521 100644
--- a/Modules/_functoolsmodule.c
+++ b/Modules/_functoolsmodule.c
@@ -491,7 +491,8 @@ static PyType_Spec partial_type_spec = {
     .name = "functools.partial",
     .basicsize = sizeof(partialobject),
     .flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
-             Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_VECTORCALL,
+             Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_VECTORCALL |
+             Py_TPFLAGS_IMMUTABLETYPE,
     .slots = partial_type_slots
 };
 
@@ -559,7 +560,7 @@ static PyType_Spec keyobject_type_spec = {
     .name = "functools.KeyWrapper",
     .basicsize = sizeof(keyobject),
     .flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_DISALLOW_INSTANTIATION |
-              Py_TPFLAGS_HAVE_GC),
+              Py_TPFLAGS_HAVE_GC | Py_TPFLAGS_IMMUTABLETYPE),
     .slots = keyobject_type_slots
 };
 
@@ -781,7 +782,8 @@ static PyType_Slot lru_list_elem_type_slots[] = {
 static PyType_Spec lru_list_elem_type_spec = {
     .name = "functools._lru_list_elem",
     .basicsize = sizeof(lru_list_elem),
-    .flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_DISALLOW_INSTANTIATION,
+    .flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_DISALLOW_INSTANTIATION |
+             Py_TPFLAGS_IMMUTABLETYPE,
     .slots = lru_list_elem_type_slots
 };
 
@@ -1417,7 +1419,7 @@ static PyType_Spec lru_cache_type_spec = {
     .name = "functools._lru_cache_wrapper",
     .basicsize = sizeof(lru_cache_object),
     .flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
-             Py_TPFLAGS_METHOD_DESCRIPTOR,
+             Py_TPFLAGS_METHOD_DESCRIPTOR | Py_TPFLAGS_IMMUTABLETYPE,
     .slots = lru_cache_type_slots
 };