bpo-42392: Remove loop parameter form asyncio locks and Queue (#23420)
Co-authored-by: Andrew Svetlov <andrew.svetlov@gmail.com>
diff --git a/Lib/asyncio/mixins.py b/Lib/asyncio/mixins.py
new file mode 100644
index 0000000..dbc4b5f
--- /dev/null
+++ b/Lib/asyncio/mixins.py
@@ -0,0 +1,21 @@
+"""Event loop mixins."""
+
+import threading
+from . import events
+
+_global_lock = threading.Lock()
+
+
+class _LoopBoundedMixin:
+ _loop = None
+
+ def _get_loop(self):
+ loop = events._get_running_loop()
+
+ if self._loop is None:
+ with _global_lock:
+ if self._loop is None:
+ self._loop = loop
+ if loop is not self._loop:
+ raise RuntimeError(f'{type(self).__name__} have already bounded to another loop')
+ return loop