QSharedMemory, signals and QBuffer

[sky]

Hi,

I am trying to get signals when a QSharedMemory is written to. I tried it a few times in the folowing way:

QSharedMemory *sm = new QSharedMemory("key", this);
    QByteArray *ba;
    QBuffer *buff;
    if(sm->create(1024))
    {
        ba = new QByteArray();
        ba->setRawData((char*)sm->data(), sm->size());
        buff = new QBuffer(ba, this);
        connect(buff, SIGNAL(readyRead()), this, SLOT(bufferReadyRead()));
 
        memset(sm->data(), NULL, sm->size());
        QByteArray response = myDomDoc.toByteArray();
 
            sm->lock();
            buff->open(QIODevice::ReadWrite);
            memcpy((char*)sm->data(), response.data(), sm->size()-1);
            buff->close();
           // Here I want the QBuffer's readyRead() signal to emit
            sm->unlock();
        }

QSharedMemory *sm = new QSharedMemory("key", this);
    QByteArray *ba;
    QBuffer *buff;
    if(sm->create(1024))
    {
        ba = new QByteArray();
        ba->setRawData((char*)sm->data(), sm->size());
        buff = new QBuffer(ba, this);
        connect(buff, SIGNAL(readyRead()), this, SLOT(bufferReadyRead()));

        memset(sm->data(), NULL, sm->size());
        QByteArray response = myDomDoc.toByteArray();

            sm->lock();
            buff->open(QIODevice::ReadWrite);
            memcpy((char*)sm->data(), response.data(), sm->size()-1);
            buff->close();
           // Here I want the QBuffer's readyRead() signal to emit
            sm->unlock();
        }

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My attempt might be a little contorted but I hope you get the idea. I am trying to wrap a QBuffer around a QSharedMemory data so that I can get a signal when somebody writes to the QSharedMemory.

Is this a good way to do this? Is there a better way to do it? If not what is best way to get a signal when my QSharedMemory is written to.

Best regards.