IOKit notifications

FROM : ed despard
DATE : Fri Nov 17 14:52:05 2006

I apologize for the other two empty body messages with the same 
title, Im not sure what was happening with my mail client.

Hi, Im trying to receive notifications of usb device connection and 
termination from within my cocoa apps.  Apples CF based example code 
works fine, but when I converted their code to work in my 
application, i never receive any notifications.  The relevent code is 
provided below


- (void) awakeFromNib
{
   kern_return_t        kr;
       
   NSMutableDictionary* matchingDict = IOServiceMatching
(kIOUSBDeviceClassName);
   NSNumber* usbVendor = [NSNumber numberWithInt:1027];
   NSNumber* usbProduct = [NSNumber numberWithInt:24592];
   [matchingDict takeValue:usbVendor forKey:@"kUSBVendorID"];
   [matchingDict takeValue:usbProduct forKey:@"kUSBProductID"];
   
   notifyPort = IONotificationPortCreate(kIOMasterPortDefault);
   CFRunLoopSourceRef        runLoopSource;
   runLoopSource = IONotificationPortGetRunLoopSource(notifyPort);
   NSRunLoop* currentRunLoop = [NSRunLoop currentRunLoop];
   CFRunLoopRef CFRunLoop = [currentRunLoop getCFRunLoop];
   CFRunLoopAddSource(CFRunLoop, runLoopSource, kCFRunLoopDefaultMode);
   
   kr = IOServiceAddMatchingNotification(    notifyPort,            // notifyPort
                       kIOFirstMatchNotification,    // notificationType
                       matchingDict,            // matching
                       DeviceAdded,            // callback
                       NULL,                // refCon
                       &gAddedIter    
                       );        
   DeviceAdded(NULL,gAddedIter);
}

the usbVendor and USBProduct ids are correct for my device.
notifyport is a member of the class
IOServiceAddMatchingNotification does return KERN_SUCCESS


thanks,
Ed Despard