mirror of
https://github.com/pyqt/examples.git
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85 lines
2.8 KiB
Python
85 lines
2.8 KiB
Python
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#!/usr/bin/env python
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#############################################################################
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##
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## Copyright (C) 2014 Riverbank Computing Limited.
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## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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## All rights reserved.
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##
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## This file is part of the examples of PyQt.
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##
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## $QT_BEGIN_LICENSE:BSD$
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## You may use this file under the terms of the BSD license as follows:
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##
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## "Redistribution and use in source and binary forms, with or without
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## modification, are permitted provided that the following conditions are
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## met:
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## * Redistributions of source code must retain the above copyright
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## notice, this list of conditions and the following disclaimer.
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## * Redistributions in binary form must reproduce the above copyright
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## notice, this list of conditions and the following disclaimer in
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## the documentation and/or other materials provided with the
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## distribution.
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## * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
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## the names of its contributors may be used to endorse or promote
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## products derived from this software without specific prior written
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## permission.
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##
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## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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## $QT_END_LICENSE$
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##
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#############################################################################
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import sys
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import random
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from PyQt5.QtCore import QCoreApplication, QSemaphore, QThread
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DataSize = 100000
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BufferSize = 8192
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buffer = list(range(BufferSize))
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freeBytes = QSemaphore(BufferSize)
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usedBytes = QSemaphore()
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class Producer(QThread):
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def run(self):
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for i in range(DataSize):
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freeBytes.acquire()
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buffer[i % BufferSize] = "ACGT"[random.randint(0, 3)]
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usedBytes.release()
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class Consumer(QThread):
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def run(self):
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for i in range(DataSize):
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usedBytes.acquire()
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sys.stderr.write(buffer[i % BufferSize])
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freeBytes.release()
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sys.stderr.write("\n")
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if __name__ == '__main__':
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app = QCoreApplication(sys.argv)
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producer = Producer()
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consumer = Consumer()
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producer.start()
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consumer.start()
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producer.wait()
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consumer.wait()
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