mirror of
https://github.com/mofeng-git/One-KVM.git
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92 lines
3.4 KiB
Python
92 lines
3.4 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 multiprocessing
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import multiprocessing.queues
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import multiprocessing.sharedctypes
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import queue
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from typing import Dict
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from . import aiotools
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# =====
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class AioProcessNotifier:
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def __init__(self) -> None:
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self.__queue: multiprocessing.queues.Queue = multiprocessing.Queue()
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def notify(self) -> None:
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self.__queue.put_nowait(None)
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async def wait(self) -> None:
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while not (await aiotools.run_async(self.__inner_wait)):
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pass
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def __inner_wait(self) -> bool:
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try:
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self.__queue.get(timeout=0.1)
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while not self.__queue.empty():
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self.__queue.get()
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return True
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except queue.Empty:
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return False
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# =====
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class AioSharedFlags:
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def __init__(
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self,
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initial: Dict[str, bool],
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notifier: AioProcessNotifier,
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) -> None:
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self.__notifier = notifier
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self.__flags: Dict[str, multiprocessing.sharedctypes.RawValue] = {
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key: multiprocessing.RawValue("i", int(value)) # type: ignore
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for (key, value) in initial.items()
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}
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self.__lock = multiprocessing.Lock()
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def update(self, **kwargs: bool) -> None:
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changed = False
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with self.__lock:
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for (key, value) in kwargs.items():
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value = int(value) # type: ignore
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if self.__flags[key].value != value:
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self.__flags[key].value = value
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changed = True
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if changed:
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self.__notifier.notify()
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async def get(self) -> Dict[str, bool]:
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return (await aiotools.run_async(self.__inner_get))
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def __inner_get(self) -> Dict[str, bool]:
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with self.__lock:
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return {
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key: bool(shared.value)
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for (key, shared) in self.__flags.items()
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}
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