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https://github.com/PaiGramTeam/MibooGram.git
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51 lines
1.4 KiB
Python
51 lines
1.4 KiB
Python
import asyncio
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from asyncio import Task
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from multiprocessing import RLock as Lock
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from typing import Any, Dict, TYPE_CHECKING
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if TYPE_CHECKING:
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from multiprocessing.synchronize import RLock as LockType
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__all__ = ("HashLock",)
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_lock: "LockType" = Lock()
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_locks: Dict[int, "LockType"] = {}
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_clean_lock_task_map: Dict[int, Task] = {}
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async def delete_lock(target: int) -> None:
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await asyncio.sleep(3)
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with _lock:
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del _locks[target]
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del _clean_lock_task_map[target] # pylint: disable=E0602
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class HashLock:
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"""可以根据 hash 来获取锁的类"""
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target: int
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@property
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def lock(self) -> "LockType":
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# noinspection PyTypeChecker
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with _lock:
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if self.target not in _locks:
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# noinspection PyTypeChecker
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_locks[self.target] = Lock()
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else:
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_clean_lock_task_map[self.target].cancel()
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_clean_lock_task_map.update({self.target: asyncio.create_task(delete_lock(self.target))})
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return _locks[self.target]
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def __init__(self, target: Any) -> None:
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if not isinstance(target, int):
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target = hash(target)
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self.target = target
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def __enter__(self) -> bool:
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# noinspection PyTypeChecker
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return self.lock.__enter__()
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def __exit__(self, exc_type=None, exc_val=None, exc_tb=None):
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return self.lock.__exit__(exc_type, exc_val, exc_tb)
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