// [DllImport(hid)]
// internal static extern long AllocateHIDObjectFromIOHIDDeviceRef(IOHIDDeviceRef inIOHIDDeviceRef);
internal static long AllocateHIDObjectFromIOHIDDeviceRef(IOHIDDeviceRef inIOHIDDeviceRef)
{
long result = 0;
if (inIOHIDDeviceRef != IntPtr.Zero)
{
// Set up the matching criteria for the devices we're interested in.
// We are interested in instances of class IOHIDDevice.
// matchingDict is consumed below( in IOServiceGetMatchingService )
// so we have no leak here.
//CFMutableDictionaryRef matchingDict = IOServiceMatching(kIOHIDDeviceKey);
byte[] utf8Bytes = Encoding.UTF8.GetBytes(Native.kIOHIDDeviceKey);
//char[] charArr=Native.IOHIDDeviceKey.ToCharArray(
IntPtr bufferIntPtr = Marshal.AllocHGlobal(utf8Bytes.Length);
Marshal.Copy(utf8Bytes, 0, bufferIntPtr, utf8Bytes.Length);
IntPtr matchingDictRef = Native.IOServiceMatching(bufferIntPtr);
matchingDictRef = Native.IOServiceMatching(Native.CFSTR(Native.kIOHIDDeviceKey));
Marshal.FreeHGlobal(bufferIntPtr);
if (matchingDictRef != IntPtr.Zero)
{
Native.CFDictionary dict = new Native.CFDictionary(matchingDictRef);
// Add a key for locationID to our matching dictionary. This works for matching to
// IOHIDDevices, so we will only look for a device attached to that particular port
// on the machine.
IntPtr tCFTypeRef = Native.IOHIDDeviceGetProperty(inIOHIDDeviceRef, Native.CFSTR(Native.kIOHIDLocationIDKey));
if (tCFTypeRef != IntPtr.Zero)
{
dict[Native.kIOHIDLocationIDKey] = tCFTypeRef;
//CFDictionaryAddValue (matchingDictRef, CFSTR (Native.IOHIDLocationIDKey), tCFTypeRef);
// CFRelease( tCFTypeRef ); // don't release objects that we "Get".
// IOServiceGetMatchingService assumes that we already know that there is only one device
// that matches. This way we don't have to do the whole iteration dance to look at each
// device that matches. This is a new API in 10.2
//result = Native.IOServiceGetMatchingService (kIOMasterPortDefault, matchingDictRef);
result = Native.IOServiceGetMatchingService(IntPtr.Zero, matchingDictRef);
}
// Note: We're not leaking the matchingDict.
// One reference is consumed by IOServiceGetMatchingServices
}
}
return(result);
}
