public Task<int> RequestTimeoutAsync (IOUSBDevRequestTO request)
{
ThrowIfDisposed ();
var completionSource = new TaskCompletionSource<int> ();
GCHandle callbackHandle = new GCHandle ();
IOAsyncCallback1 callback = (refCon, callbackResult, arg0) => {
callbackHandle.Free ();
if (callbackResult == IOReturn.Success)
completionSource.TrySetResult ((int)arg0);
else
completionSource.TrySetException (callbackResult.ToNSErrorException ());
};
callbackHandle = GCHandle.Alloc (callback, GCHandleType.Pinned);
var result = Interface.DeviceRequestAsyncTO (InterfaceRef, request, callback, IntPtr.Zero);
IOObject.ThrowIfError (result);
return completionSource.Task;
}
public void RequestTimeout (ref IOUSBDevRequestTO request)
{
ThrowIfDisposed ();
var result = Interface.DeviceRequestTO (InterfaceRef, ref request);
IOObject.ThrowIfError (result);
}