53 lines
1.8 KiB
Python
53 lines
1.8 KiB
Python
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#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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#
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# Copyright 2016-2099 Ailemon.net
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#
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# This file is part of ASRT Speech Recognition Tool.
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#
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# ASRT 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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# ASRT 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 ASRT. If not, see <https://www.gnu.org/licenses/>.
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# ============================================================================
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'''
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@author: nl8590687
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解决python生成器多线程的线程安全问题
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'''
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import threading
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'''
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A generic iterator and generator that takes any iterator and wrap it to make it thread safe.
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This method was introducted by Anand Chitipothu in http://anandology.com/blog/using-iterators-and-generators/
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but was not compatible with python 3. This modified version is now compatible and works both in python 2.8 and 3.0
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'''
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class threadsafe_iter:
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"""Takes an iterator/generator and makes it thread-safe by
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serializing call to the `next` method of given iterator/generator.
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"""
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def __init__(self, it):
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self.it = it
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self.lock = threading.Lock()
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def __iter__(self):
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return self
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def __next__(self):
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with self.lock:
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return self.it.__next__()
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def threadsafe_generator(f):
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"""A decorator that takes a generator function and makes it thread-safe.
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"""
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def g(*a, **kw):
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return threadsafe_iter(f(*a, **kw))
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return g
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