CodaDevicePtr SymbianDeviceManager::getCodaDevice(const QString &port)
{
ensureInitialized();
QMutexLocker lock(&d->m_devicesLock);
const int idx = findByPortName(port);
if (idx == -1) {
qWarning("Attempt to acquire device '%s' that does not exist.", qPrintable(port));
if (debug)
qDebug() << *this;
return CodaDevicePtr();
}
SymbianDevice& device = d->m_devices[idx];
CodaDevicePtr& devicePtr = device.m_data->codaDevice;
if (devicePtr.isNull() || !devicePtr->device()->isOpen()) {
// Check we instanciate in the correct thread - we can't afford to create the CodaDevice (and more specifically, open the VirtualSerialDevice) in a thread that isn't guaranteed to be long-lived.
// Therefore, if we're not in SymbianDeviceManager's thread, rejig things so it's opened in the main thread
if (QThread::currentThread() != thread()) {
// SymbianDeviceManager is owned by the main thread
d->m_codaPortWaitMutex.lock();
QWaitCondition waiter;
QCoreApplication::postEvent(this, new QConstructCodaPortEvent((QEvent::Type)d->m_constructCodaPortEventType, port, &devicePtr, &waiter));
waiter.wait(&d->m_codaPortWaitMutex);
// When the wait returns (due to the wakeAll in SymbianDeviceManager::customEvent), the CodaDevice will be fully set up
d->m_codaPortWaitMutex.unlock();
} else {
// We're in the main thread, just set it up directly
constructCodaPort(devicePtr, port);
}
// We still carry on in the case we failed to open so the client can access the IODevice's errorString()
}
if (devicePtr->device()->isOpen())
device.m_data->deviceAcquired++;
return devicePtr;
}
void SymbianDeviceManager::customEvent(QEvent *event)
{
if (event->type() == d->m_constructTcfPortEventType) {
QConstructTcfPortEvent* constructEvent = static_cast<QConstructTcfPortEvent*>(event);
constructCodaPort(*constructEvent->m_device, constructEvent->m_portName);
constructEvent->m_waiter->wakeAll(); // Should only ever be one thing waiting on this
}
}
