QThread: Destroyed while thread is still running

void QThread::requestInterruption()
{
    Q_D(QThread);
    QMutexLocker locker(&d->mutex);
    if (!d->running || d->finished || d->isInFinish)
        return;
    if (this == QCoreApplicationPrivate::theMainThread) {
        qWarning("QThread::requestInterruption has no effect on the main thread");
        return;
    }
    d->interruptionRequested = true;
}
 
bool QThread::isInterruptionRequested() const
{
    Q_D(const QThread);
    QMutexLocker locker(&d->mutex);
    if (!d->running || d->finished || d->isInFinish) // 如果线程已经结束就。。。
        return false;
    return d->interruptionRequested;
}

while (!isInterruptionRequested())
{
     /////

     /////  
}

ThreadToDisks:: ~ThreadToDisks()
{
    requestInterruption();
    quit();
    wait();
}