src_corelib_thread_qreadwritelock.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
QReadWriteLock lock;
 
void ReaderThread::run()
{
    ...
    lock.lockForRead();
    read_file();
    lock.unlock();
    ...
}
 
void WriterThread::run()
{
    ...
    lock.lockForWrite();
    write_file();
    lock.unlock();
    ...
}
 
 
QReadWriteLock lock;
 
QByteArray readData()
{
    QReadLocker locker(&lock);
    ...
    return data;
}
 
 
QReadWriteLock lock;
 
QByteArray readData()
{
    lock.lockForRead();
    ...
    lock.unlock();
    return data;
}
 
 
QReadWriteLock lock;
 
void writeData(const QByteArray &data)
{
    QWriteLocker locker(&lock);
    ...
}
 
 
QReadWriteLock lock;
 
void writeData(const QByteArray &data)
{
    lock.lockForWrite();
    ...
    lock.unlock();
}