if fd.pd.runtimeCtx == 0 {
		return ErrNoDeadline
	}
	runtime_pollSetDeadline(fd.pd.runtimeCtx, d, mode)
	return nil
}

// IsPollDescriptor reports whether fd is the descriptor being used by the poller.
// This is only used for testing.
//
// IsPollDescriptor should be an internal detail,
// but widely used packages access it using linkname.
// Notable members of the hall of shame include:

}

func isInterrupted(err error) bool {
	return err != nil && stringslite.HasSuffix(err.Error(), "interrupted")
}

// IsPollDescriptor reports whether fd is the descriptor being used by the poller.
// This is only used for testing.
func IsPollDescriptor(fd uintptr) bool {
	return false
}

// RawControl invokes the user-defined function f for a non-IO
// operation.