mirror of
https://github.com/pyqt/examples.git
synced 2025-08-22 17:47:10 +00:00
54f8b69baa
The commits since then moved many files into the src/ subdirectory. This would have broken existing links on the internet. To solve this, we leave the master branch as-is and make such breaking changes on a different branch.
107 lines
3.4 KiB
Python
107 lines
3.4 KiB
Python
#!/usr/bin/env python
|
|
|
|
|
|
#############################################################################
|
|
##
|
|
## Copyright (C) 2013 Riverbank Computing Limited.
|
|
## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
|
|
## All rights reserved.
|
|
##
|
|
## This file is part of the examples of PyQt.
|
|
##
|
|
## $QT_BEGIN_LICENSE:BSD$
|
|
## You may use this file under the terms of the BSD license as follows:
|
|
##
|
|
## "Redistribution and use in source and binary forms, with or without
|
|
## modification, are permitted provided that the following conditions are
|
|
## met:
|
|
## * Redistributions of source code must retain the above copyright
|
|
## notice, this list of conditions and the following disclaimer.
|
|
## * Redistributions in binary form must reproduce the above copyright
|
|
## notice, this list of conditions and the following disclaimer in
|
|
## the documentation and/or other materials provided with the
|
|
## distribution.
|
|
## * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
|
|
## the names of its contributors may be used to endorse or promote
|
|
## products derived from this software without specific prior written
|
|
## permission.
|
|
##
|
|
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
|
|
## $QT_END_LICENSE$
|
|
##
|
|
#############################################################################
|
|
|
|
|
|
import sys
|
|
import random
|
|
|
|
from PyQt5.QtCore import QCoreApplication, QMutex, QThread, QWaitCondition
|
|
|
|
|
|
DataSize = 100000
|
|
BufferSize = 8192
|
|
buffer = list(range(BufferSize))
|
|
|
|
bufferNotEmpty = QWaitCondition()
|
|
bufferNotFull = QWaitCondition()
|
|
mutex = QMutex()
|
|
numUsedBytes = 0
|
|
|
|
|
|
class Producer(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(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 = QCoreApplication(sys.argv)
|
|
producer = Producer()
|
|
consumer = Consumer()
|
|
producer.start()
|
|
consumer.start()
|
|
producer.wait()
|
|
consumer.wait()
|