internal void Init(NativeMethods.io_string_t path)
{
IntPtr handle; int retryCount = 0, maxRetries = 10;
while (true)
{
var newPath = path.Clone();
using (var service = NativeMethods.IORegistryEntryFromPath(0, ref newPath).ToIOObject())
{
string error;
if (service.IsSet)
{
handle = NativeMethods.IOHIDDeviceCreate(IntPtr.Zero, service);
if (handle != IntPtr.Zero)
{
var ret = NativeMethods.IOHIDDeviceOpen(handle);
if (ret == NativeMethods.IOReturn.Success)
{
break;
}
NativeMethods.CFRelease(handle);
// TODO: Only count up if IOReturn is ExclusiveAccess or Offline.
error = string.Format("Unable to open HID class device (error {1}): {0}", newPath.ToString(), ret);
}
else
{
error = string.Format("HID class device not found: {0}", newPath.ToString());
}
}
else
{
error = string.Format("HID class device path not found: {0}", newPath.ToString());
}
if (++retryCount == maxRetries)
{
throw DeviceException.CreateIOException(Device, error);
}
Debug.WriteLine(string.Format("Retrying ({0})", error));
Thread.Sleep(100);
}
}
_handle = handle;
HandleInitAndOpen();
_readThread.Start();
_writeThread.Start();
}
