@Override
public void unexportAll() {
// un-export all GPIO pins that are currently exported
for (GpioPin pin : pins) {
if (pin.isExported()) {
pin.unexport();
}
}
}
@Override
public void unexport(GpioPin... pin) {
if (pin == null || pin.length == 0) {
throw new IllegalArgumentException("Missing pin argument.");
}
for (GpioPin p : pin) {
// ensure the requested pin has been provisioned
if (!pins.contains(p)) {
throw new GpioPinNotProvisionedException(p.getPin());
}
// unexport the pin
p.unexport();
}
}
/**
* This method can be called to forcefully shutdown all GPIO controller monitoring, listening, and
* task threads/executors.
*/
@Override
public synchronized void shutdown() {
// prevent reentrant invocation
if (isShutdown()) return;
// shutdown all executor services
//
// NOTE: we are not permitted to access the shutdown() method of the individual
// executor services, we must perform the shutdown with the factory
GpioFactory.getExecutorServiceFactory().shutdown();
// shutdown explicit configured GPIO pins
for (GpioPin pin : pins) {
// perform a shutdown on the GPIO provider for this pin
if (!pin.getProvider().isShutdown()) {
pin.getProvider().shutdown();
}
// perform the shutdown options if configured for the pin
GpioPinShutdown shutdownOptions = pin.getShutdownOptions();
if (shutdownOptions != null) {
// get shutdown option configuration
PinState state = shutdownOptions.getState();
PinMode mode = shutdownOptions.getMode();
PinPullResistance resistance = shutdownOptions.getPullResistor();
Boolean unexport = shutdownOptions.getUnexport();
// perform shutdown actions
if ((state != null) && (pin instanceof GpioPinDigitalOutput)) {
((GpioPinDigitalOutput) pin).setState(state);
}
if (resistance != null) {
pin.setPullResistance(resistance);
}
if (mode != null) {
pin.setMode(mode);
}
if (unexport != null && unexport == Boolean.TRUE) {
pin.unexport();
}
}
}
// set is shutdown tracking variable
isshutdown = true;
}
