Issue #13380: add an internal function for resetting the ctypes caches
diff --git a/Lib/ctypes/__init__.py b/Lib/ctypes/__init__.py
index 71686e7..111209a 100644
--- a/Lib/ctypes/__init__.py
+++ b/Lib/ctypes/__init__.py
@@ -265,7 +265,21 @@
class c_wchar(_SimpleCData):
_type_ = "u"
-POINTER(c_wchar).from_param = c_wchar_p.from_param #_SimpleCData.c_wchar_p_from_param
+def _reset_cache():
+ _pointer_type_cache.clear()
+ _c_functype_cache.clear()
+ if _os.name in ("nt", "ce"):
+ _win_functype_cache.clear()
+ # _SimpleCData.c_wchar_p_from_param
+ POINTER(c_wchar).from_param = c_wchar_p.from_param
+ # _SimpleCData.c_char_p_from_param
+ POINTER(c_char).from_param = c_char_p.from_param
+ _pointer_type_cache[None] = c_void_p
+ # XXX for whatever reasons, creating the first instance of a callback
+ # function is needed for the unittests on Win64 to succeed. This MAY
+ # be a compiler bug, since the problem occurs only when _ctypes is
+ # compiled with the MS SDK compiler. Or an uninitialized variable?
+ CFUNCTYPE(c_int)(lambda: None)
def create_unicode_buffer(init, size=None):
"""create_unicode_buffer(aString) -> character array
@@ -285,7 +299,6 @@
return buf
raise TypeError(init)
-POINTER(c_char).from_param = c_char_p.from_param #_SimpleCData.c_char_p_from_param
# XXX Deprecated
def SetPointerType(pointer, cls):
@@ -445,8 +458,6 @@
descr = FormatError(code).strip()
return WindowsError(code, descr)
-_pointer_type_cache[None] = c_void_p
-
if sizeof(c_uint) == sizeof(c_void_p):
c_size_t = c_uint
c_ssize_t = c_int
@@ -529,8 +540,4 @@
elif sizeof(kind) == 8: c_uint64 = kind
del(kind)
-# XXX for whatever reasons, creating the first instance of a callback
-# function is needed for the unittests on Win64 to succeed. This MAY
-# be a compiler bug, since the problem occurs only when _ctypes is
-# compiled with the MS SDK compiler. Or an uninitialized variable?
-CFUNCTYPE(c_int)(lambda: None)
+_reset_cache()