private void DeviceRemoved(DeviceWatcherCallbackReference data, IntPtr service, uint messageType, IntPtr messageArgument)
{
if (messageType == IOKitFramework.kIOMessageServiceIsTerminated)
{
Debug.WriteLine("Device Removed");
var removed = (DeviceRemoved)(GCHandle.FromIntPtr(data.removedCallback).Target);
removed(data.deviceIndex);
}
}
public void RunScanner()
{
int usbVendor = (int)TreehopperUsb.Settings.Vid;
int usbProduct = (int)TreehopperUsb.Settings.Pid;
IntPtr gAddedIter = IntPtr.Zero;
var matchingDict = NativeMethods.IOServiceMatching(IOKitFramework.kIOUSBDeviceClassName);
if (matchingDict == IntPtr.Zero)
{
throw new Exception("IOServiceMatching returned NULL");
}
var numberRef = NativeMethods.CFNumberCreate(IOKitFramework.kCFAllocatorDefault, CFNumberType.kCFNumberSInt32Type, ref usbVendor);
NativeMethods.CFDictionarySetValue(matchingDict, NativeMethods.__CFStringMakeConstantString(IOKitFramework.kUSBVendorID), numberRef);
NativeMethods.CFRelease(numberRef);
numberRef = NativeMethods.CFNumberCreate(IOKitFramework.kCFAllocatorDefault, CFNumberType.kCFNumberSInt32Type, ref usbProduct);
NativeMethods.CFDictionarySetValue(matchingDict, NativeMethods.__CFStringMakeConstantString(IOKitFramework.kUSBProductID), numberRef);
NativeMethods.CFRelease(numberRef);
gNotifyPort = NativeMethods.IONotificationPortCreate(IOKitFramework.kIOMasterPortDefault);
var runLoopSource = NativeMethods.IONotificationPortGetRunLoopSource(gNotifyPort);
gRunLoop = NativeMethods.CFRunLoopGetCurrent();
NativeMethods.CFRunLoopAddSource(gRunLoop, runLoopSource, NativeMethods.__CFStringMakeConstantString(IOKitFramework.kCFRunLoopDefaultMode));
IOServiceMatchingCallback deviceAdded = new IOServiceMatchingCallback(DeviceAdded);
DeviceWatcherCallbackReference callbackRef = new DeviceWatcherCallbackReference();
var kr = NativeMethods.IOServiceAddMatchingNotification(
gNotifyPort, // notifyPort
IOKitFramework.kIOFirstMatchNotification, // notificationType
matchingDict, // matching
DeviceAdded, // callback
callbackRef, // refCon
ref gAddedIter // notification
);
DeviceAdded(callbackRef, gAddedIter);
NativeMethods.CFRunLoopRun();
}
// why does this have to be async?
private async void DeviceAdded(DeviceWatcherCallbackReference callbackRef, IntPtr iterator)
{
var it = new IOIterator(iterator);
var usbDevice = it.Next();
while (usbDevice != null)
{
var vendorString = usbDevice.GetCFPropertyString(IOKitFramework.kUSBVendorString);
var productString = usbDevice.GetCFPropertyString(IOKitFramework.kUSBProductString);
var serialNumber = usbDevice.GetCFPropertyString(IOKitFramework.kUSBSerialNumberString);
Debug.WriteLine("Found Device:");
Debug.WriteLine("Vendor: " + vendorString);
Debug.WriteLine("Product: " + productString);
Debug.WriteLine("Serial Number: " + serialNumber);
Debug.WriteLine("");
var idx = OnDeviceAdded(usbDevice, productString, serialNumber);
var ptr = GCHandle.ToIntPtr(GCHandle.Alloc(this.OnDeviceRemoved, GCHandleType.Pinned));
var removedCallback = new DeviceWatcherCallbackReference()
{
deviceIndex = idx, removedCallback = ptr
};
GCHandle.Alloc(removedCallback, GCHandleType.Pinned);
GCHandle.Alloc(this, GCHandleType.Pinned);
GCHandle.Alloc(this.OnDeviceRemoved, GCHandleType.Pinned);
var kr = NativeMethods.IOServiceAddInterestNotification(
gNotifyPort, // notifyPort
usbDevice.Handle, // service
IOKitFramework.kIOGeneralInterest, // interestType
DeviceRemoved, // callback
removedCallback, // refCon
ref notificationPtr // notification
);
usbDevice = it.Next();
}
}
