bool AMGenericLinuxJoystick::attemptConnection()
{
// Do we have a connection open already? Close the reading thread, and close the file descriptor.
if(readThread_) {
disconnect(readThread_, SIGNAL(finished()), this, SLOT(onReadThreadFinished()));
readThread_->stop();
readThread_->wait();
delete readThread_;
readThread_ = 0;
close(fd_);
fd_ = -1;
AMErrorMon::information(this, 0, QString("Disconnected from joystick: '%1' before attempting to reconnect on '%2'").arg(deviceDescription()).arg(deviceIdentifier()));
emit connected(false);
}
// Try opening the joystick device
fd_ = open(deviceIdentifier_.toAscii().constData(), O_RDONLY | O_NONBLOCK);
if(fd_ == -1) {
// Failed to open. Maybe not plugged in yet? Just keep trying. We'll re-attempt in 2 seconds.
QTimer::singleShot(2000, this, SLOT(attemptConnection()));
return false;
}
// Get the number of buttons and number of axes, using special ioctl() on the file descriptor.
char numAxes;
ioctl(fd_, JSIOCGAXES, &numAxes);
axisCount_ = numAxes;
axisPositions_.resize(axisCount_);
char numButtons;
ioctl(fd_, JSIOCGBUTTONS, &numButtons);
buttonCount_ = numButtons;
buttonStates_.resize(buttonCount_);
// Get the joystick description
char description[256];
if(ioctl(fd_, JSIOCGNAME(sizeof(description)), description) < 0)
deviceDescription_ = "Unknown";
else
deviceDescription_ = QString(description);
// Finally, start up the thread for reading from the joystick.
readThread_ = new AMGenericLinuxJoystickThread(fd_, this);
connect(readThread_, SIGNAL(finished()), this, SLOT(onReadThreadFinished()));
connect(readThread_, SIGNAL(joystickEvents(QVector<AMGenericLinuxJoystickEvent>)), this, SLOT(onJoystickEvents(QVector<AMGenericLinuxJoystickEvent>)));
readThread_->start();
AMErrorMon::information(this, 0, QString("Connected to joystick: '%1' on '%2'.").arg(deviceDescription()).arg(deviceIdentifier()));
emit connected(true);
return true;
}
QList<QSerialPortInfo> QSerialPortInfo::availablePorts()
{
CFMutableDictionaryRef serialPortDictionary = ::IOServiceMatching(kIOSerialBSDServiceValue);
if (!serialPortDictionary)
return QList<QSerialPortInfo>();
::CFDictionaryAddValue(serialPortDictionary,
CFSTR(kIOSerialBSDTypeKey),
CFSTR(kIOSerialBSDAllTypes));
io_iterator_t serialPortIterator = 0;
if (::IOServiceGetMatchingServices(kIOMasterPortDefault, serialPortDictionary,
&serialPortIterator) != KERN_SUCCESS) {
return QList<QSerialPortInfo>();
}
QList<QSerialPortInfo> serialPortInfoList;
forever {
io_registry_entry_t serialPortService = ::IOIteratorNext(serialPortIterator);
if (!serialPortService)
break;
QSerialPortInfoPrivate priv;
forever {
if (priv.portName.isEmpty())
priv.portName = devicePortName(serialPortService);
if (priv.device.isEmpty())
priv.device = deviceSystemLocation(serialPortService);
if (priv.description.isEmpty())
priv.description = deviceDescription(serialPortService);
if (priv.manufacturer.isEmpty())
priv.manufacturer = deviceManufacturer(serialPortService);
if (priv.serialNumber.isEmpty())
priv.serialNumber = deviceSerialNumber(serialPortService);
if (!priv.hasVendorIdentifier) {
priv.vendorIdentifier =
deviceVendorIdentifier(serialPortService,
priv.hasVendorIdentifier);
}
if (!priv.hasProductIdentifier) {
priv.productIdentifier =
deviceProductIdentifier(serialPortService,
priv.hasProductIdentifier);
}
if (isCompleteInfo(priv)) {
::IOObjectRelease(serialPortService);
break;
}
serialPortService = parentSerialPortService(serialPortService);
if (!serialPortService)
break;
}
serialPortInfoList.append(priv);
}
::IOObjectRelease(serialPortIterator);
return serialPortInfoList;
}
void AMGenericLinuxJoystick::onReadThreadFinished()
{
delete readThread_;
readThread_ = 0;
close(fd_);
fd_ = -1;
QTimer::singleShot(2000, this, SLOT(attemptConnection())); // try to keep re-connecting, if it gets plugged back in.
AMErrorMon::alert(this, -1, QString("Disconnected from joystick: '%1' because of a read error. Is it possible the joystick was unplugged?").arg(deviceDescription()));
emit connected(false);
}
