mirror of
https://github.com/mofeng-git/One-KVM.git
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56 lines
2.2 KiB
Python
56 lines
2.2 KiB
Python
# ========================================================================== #
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# #
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# KVMD - The main Pi-KVM daemon. #
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# #
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# Copyright (C) 2018 Maxim Devaev <mdevaev@gmail.com> #
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# #
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# This program is free software: you can redistribute it and/or modify #
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# it under the terms of the GNU General Public License as published by #
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# the Free Software Foundation, either version 3 of the License, or #
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# (at your option) any later version. #
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# #
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# This program is distributed in the hope that it will be useful, #
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# but WITHOUT ANY WARRANTY; without even the implied warranty of #
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
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# GNU General Public License for more details. #
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# #
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# You should have received a copy of the GNU General Public License #
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# along with this program. If not, see <https://www.gnu.org/licenses/>. #
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# #
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# ========================================================================== #
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import types
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from typing import Type
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# =====
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class AioExclusiveRegion:
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def __init__(self, exc_type: Type[Exception]) -> None:
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self.__exc_type = exc_type
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self.__busy = False
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def is_busy(self) -> bool:
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return self.__busy
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def enter(self) -> None:
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if not self.__busy:
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self.__busy = True
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return
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raise self.__exc_type()
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def exit(self) -> None:
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self.__busy = False
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def __enter__(self) -> None:
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self.enter()
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def __exit__(
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self,
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_exc_type: Type[BaseException],
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_exc: BaseException,
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_tb: types.TracebackType,
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) -> None:
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self.exit()
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