Terminating Multiple Running Threads?

[PLan2010]

I have a basic web server that accepts an incoming connection and starts a separate QThread to handle the request -

void Server::incomingConnection(int socketDescriptor)
{
    thread = new ServerThread(socketDescriptor, this);
    connect(thread, SIGNAL(finished()), thread, SLOT(deleteLater()));
    thread->start();
}

void Server::incomingConnection(int socketDescriptor)
{
    thread = new ServerThread(socketDescriptor, this);
    connect(thread, SIGNAL(finished()), thread, SLOT(deleteLater()));
    thread->start();
}

To copy to clipboard, switch view to plain text mode 

If, for example, I have ten download threads running at the same time and I want to stop them all - immediately - what method should I use to terminate all the threads?