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c5a46fda44
Fix: <asyncio.locks.Semaphore object at 0xabcd [locked]> is bound to a different event loop
57 lines
1.8 KiB
Python
57 lines
1.8 KiB
Python
#
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# Copyright 2026 The InfiniFlow Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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import asyncio
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import weakref
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class LoopLocalSemaphore:
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"""
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Asyncio synchronization primitives bind to the event loop that waits on them.
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Keep one semaphore per running loop for module-level concurrency limiters.
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"""
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def __init__(self, value: int):
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self._value = int(value)
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self._semaphores: "weakref.WeakKeyDictionary[asyncio.AbstractEventLoop, asyncio.Semaphore]" = (
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weakref.WeakKeyDictionary()
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)
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def _get(self) -> asyncio.Semaphore:
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loop = asyncio.get_running_loop()
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for cached_loop in list(self._semaphores):
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if cached_loop.is_closed():
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self._semaphores.pop(cached_loop, None)
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sem = self._semaphores.get(loop)
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if sem is None:
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sem = asyncio.Semaphore(self._value)
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self._semaphores[loop] = sem
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return sem
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async def acquire(self) -> bool:
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return await self._get().acquire()
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def release(self) -> None:
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self._get().release()
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async def __aenter__(self):
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await self.acquire()
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return self
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async def __aexit__(self, exc_type, exc, tb):
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self.release()
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return False
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