2025-10-23 14:08:08 +08:00
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from threading import Lock
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2025-10-24 00:11:52 +08:00
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2025-10-23 14:08:08 +08:00
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class SingletonMeta(type):
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_instances = {}
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_lock: Lock = Lock()
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def __call__(cls, *args, **kwargs):
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with cls._lock:
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if cls not in cls._instances:
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2026-05-29 22:19:58 +08:00
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cls._instances[cls] = super().__call__(*args, **kwargs)
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2025-10-24 00:11:52 +08:00
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return cls._instances[cls]
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