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#!/usr/bin/env python
############################################################################
#
# Copyright (C) 2004-2005 Trolltech AS. All rights reserved.
#
# This file is part of the example classes of the Qt Toolkit.
#
# This file may be used under the terms of the GNU General Public
# License version 2.0 as published by the Free Software Foundation
# and appearing in the file LICENSE.GPL included in the packaging of
# self file. Please review the following information to ensure GNU
# General Public Licensing requirements will be met:
# http://www.trolltech.com/products/qt/opensource.html
#
# If you are unsure which license is appropriate for your use, please
# review the following information:
# http://www.trolltech.com/products/qt/licensing.html or contact the
# sales department at sales@trolltech.com.
#
# This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
# WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
#
############################################################################
import sys
import random
from PyQt4 import QtCore
DataSize = 100000
BufferSize = 8192
buffer = list(range(BufferSize))
bufferNotEmpty = QtCore.QWaitCondition()
bufferNotFull = QtCore.QWaitCondition()
mutex = QtCore.QMutex()
numUsedBytes = 0
class Producer(QtCore.QThread):
def run(self):
global numUsedBytes
for i in range(DataSize):
mutex.lock()
if numUsedBytes == BufferSize:
bufferNotFull.wait(mutex)
mutex.unlock()
buffer[i % BufferSize] = "ACGT"[random.randint(0, 3)]
mutex.lock()
numUsedBytes += 1
bufferNotEmpty.wakeAll()
mutex.unlock()
class Consumer(QtCore.QThread):
def run(self):
global numUsedBytes
for i in range(DataSize):
mutex.lock()
if numUsedBytes == 0:
bufferNotEmpty.wait(mutex)
mutex.unlock()
sys.stderr.write(buffer[i % BufferSize])
mutex.lock()
numUsedBytes -= 1
bufferNotFull.wakeAll()
mutex.unlock()
sys.stderr.write("\n")
if __name__ == '__main__':
app = QtCore.QCoreApplication(sys.argv)
producer = Producer()
consumer = Consumer()
producer.start()
consumer.start()
producer.wait()
consumer.wait()
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