python
diff --git a/‎Modules/_ctypes/_ctypes.c
Copy file name to clipboardExpand all lines: Modules/_ctypes/_ctypes.c
+2Lines changed: 2 additions & 0 deletions b/‎Modules/_ctypes/_ctypes.c
Copy file name to clipboardExpand all lines: Modules/_ctypes/_ctypes.c
+2Lines changed: 2 additions & 0 deletions
diff --git a/‎Modules/_ctypes/cfield.c
Copy file name to clipboardExpand all lines: Modules/_ctypes/cfield.c
+2-18Lines changed: 2 additions & 18 deletions b/‎Modules/_ctypes/cfield.c
Copy file name to clipboardExpand all lines: Modules/_ctypes/cfield.c
+2-18Lines changed: 2 additions & 18 deletions
diff --git a/‎Modules/_ctypes/ctypes.h
Copy file name to clipboardExpand all lines: Modules/_ctypes/ctypes.h
+2Lines changed: 2 additions & 0 deletions b/‎Modules/_ctypes/ctypes.h
Copy file name to clipboardExpand all lines: Modules/_ctypes/ctypes.h
+2Lines changed: 2 additions & 0 deletions
@@ -6239,6 +6239,8 @@ _ctypes_mod_exec(PyObject *mod)
     }
     Py_ffi_closure_free(ptr);
 
+    _ctypes_init_fielddesc();
+
     ctypes_state *st = get_module_state(mod);
     st->_unpickle = PyObject_GetAttrString(mod, "_unpickle");
     if (st->_unpickle == NULL) {
 
@@ -1461,8 +1461,8 @@ _Py_COMP_DIAG_PUSH
 
 /* Delayed initialization. Windows cannot statically reference dynamically
    loaded addresses from DLLs. */
-static void
-_ctypes_init_fielddesc_locked(void)
+void
+_ctypes_init_fielddesc(void)
 {
     /* Fixed-width integers */
 
@@ -1659,30 +1659,14 @@ print(f"    formattable.simple_type_chars[i] = 0;")
 #undef FIXINT_FIELDDESC_FOR
 _Py_COMP_DIAG_POP
 
-static void
-_ctypes_init_fielddesc(void)
-{
-    static bool initialized = false;
-    static PyMutex mutex = {0};
-    PyMutex_Lock(&mutex);
-    if (!initialized) {
-        _ctypes_init_fielddesc_locked();
-        initialized = true;
-    }
-    PyMutex_Unlock(&mutex);
-}
-
 char *
 _ctypes_get_simple_type_chars(void) {
-    _ctypes_init_fielddesc();
     return formattable.simple_type_chars;
 }
 
 struct fielddesc *
 _ctypes_get_fielddesc(const char *fmt)
 {
-    _ctypes_init_fielddesc();
-
     struct fielddesc *result = NULL;
     switch(fmt[0]) {
 /*[python input]
 
@@ -537,6 +537,8 @@ extern int _ctypes_simple_instance(ctypes_state *st, PyObject *obj);
 
 PyObject *_ctypes_get_errobj(ctypes_state *st, int **pspace);
 
+extern void _ctypes_init_fielddesc(void);
+
 #ifdef USING_MALLOC_CLOSURE_DOT_C
 void Py_ffi_closure_free(void *p);
 void *Py_ffi_closure_alloc(size_t size, void** codeloc);
Original file line number	Diff line number	Diff line change
`@@ -6239,6 +6239,8 @@ _ctypes_mod_exec(PyObject *mod)`
`6239`	`6239`	`}`
`6240`	`6240`	`Py_ffi_closure_free(ptr);`
`6241`	`6241`
	`6242`	`+ _ctypes_init_fielddesc();`
	`6243`	`+`
`6242`	`6244`	`ctypes_state *st = get_module_state(mod);`
`6243`	`6245`	`st->_unpickle = PyObject_GetAttrString(mod, "_unpickle");`
`6244`	`6246`	`if (st->_unpickle == NULL) {`