From 1387a9efa92bf91bd084b7eaaa9d9f3e0c427990 Mon Sep 17 00:00:00 2001
From: Nikita Sobolev <mail@sobolevn.me>
Date: Sun, 19 Feb 2023 15:21:55 +0300
Subject: [PATCH] Mark `threading.(R)Lock` as `final` (#9753)

These are actually factory functions: https://github.com/python/cpython/blob/128379b8cdb88a6d3d7fed24df082c9a654b3fb8/Lib/threading.py#L108

The pure-Python version of `RLock` is, strictly-speaking, subclassable. But you're not *meant* to subclass `RLock`, even if you *can* with the pure-Python version: https://discuss.python.org/t/make-threading-lock-rlock-factory-functions-subclassable/24008/2
---
 stdlib/threading.pyi | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/stdlib/threading.pyi b/stdlib/threading.pyi
index c0b344fe7..c01797880 100644
--- a/stdlib/threading.pyi
+++ b/stdlib/threading.pyi
@@ -3,6 +3,7 @@ from _typeshed import ProfileFunction, TraceFunction
 from collections.abc import Callable, Iterable, Mapping
 from types import TracebackType
 from typing import Any, TypeVar
+from typing_extensions import final
 
 _T = TypeVar("_T")
 
@@ -101,6 +102,7 @@ class Thread:
 class _DummyThread(Thread):
     def __init__(self) -> None: ...
 
+@final
 class Lock:
     def __enter__(self) -> bool: ...
     def __exit__(
@@ -110,6 +112,7 @@ class Lock:
     def release(self) -> None: ...
     def locked(self) -> bool: ...
 
+@final
 class _RLock:
     def acquire(self, blocking: bool = True, timeout: float = -1) -> bool: ...
     def release(self) -> None: ...