77 lines
2.2 KiB
Python
77 lines
2.2 KiB
Python
########################################################################
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# File name: custom_queue.py
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# This file is part of: aioxmpp
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#
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# LICENSE
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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 Lesser General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (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, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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########################################################################
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import asyncio
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import collections
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class AsyncDeque:
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def __init__(self, *, loop=None):
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super().__init__()
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self._loop = loop
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self._data = collections.deque()
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self._non_empty = asyncio.Event()
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self._non_empty.clear()
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def __len__(self):
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return len(self._data)
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def __contains__(self, obj):
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return obj in self._data
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def empty(self):
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return not self._non_empty.is_set()
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def put_nowait(self, obj):
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self._data.append(obj)
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self._non_empty.set()
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def putleft_nowait(self, obj):
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self._data.appendleft(obj)
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self._non_empty.set()
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def get_nowait(self):
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try:
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item = self._data.popleft()
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except IndexError:
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raise asyncio.QueueEmpty() from None
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if not self._data:
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self._non_empty.clear()
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return item
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def getright_nowait(self):
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try:
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item = self._data.pop()
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except IndexError:
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raise asyncio.QueueEmpty() from None
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if not self._data:
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self._non_empty.clear()
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return item
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async def get(self):
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while not self._data:
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await self._non_empty.wait()
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return self.get_nowait()
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def clear(self):
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self._data.clear()
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self._non_empty.clear()
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