device.py 文件源码

def carrier_serial_num(self):
        """
        int: Indicates the serial number of the device carrier. This
            value is zero if the carrier does not have a serial number.
        """
        val = ctypes.c_uint()

        cfunc = lib_importer.windll.DAQmxGetCarrierSerialNum
        if cfunc.argtypes is None:
            with cfunc.arglock:
                if cfunc.argtypes is None:
                    cfunc.argtypes = [
                        ctypes_byte_str, ctypes.POINTER(ctypes.c_uint)]

        error_code = cfunc(
            self._name, ctypes.byref(val))
        check_for_error(error_code)

        return val.value