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18 lines
458 B
Python
18 lines
458 B
Python
from calibre.utils.lock import create_single_instance_mutex
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class SingleInstance:
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def __init__(self, name):
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self.name = name
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self.release_mutex = None
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def __enter__(self):
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self.release_mutex = create_single_instance_mutex(self.name)
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return self.release_mutex is not None
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def __exit__(self, *a):
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if self.release_mutex is not None:
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self.release_mutex()
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self.release_mutex = None
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