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"""Event loop mixins."""
import threading
from . import events
_global_lock = threading.Lock()
class _LoopBoundMixin:
_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'{self!r} is bound to a different event loop')
return loop
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