def niDigital_FrequencyCounter_MeasureFrequency(self, vi, channel_list, frequencies_buffer_size, frequencies, actual_num_frequencies):
    with self._func_lock:
        if (self.niDigital_FrequencyCounter_MeasureFrequency_cfunc is None):
            self.niDigital_FrequencyCounter_MeasureFrequency_cfunc = self._get_library_function('niDigital_FrequencyCounter_MeasureFrequency')
            self.niDigital_FrequencyCounter_MeasureFrequency_cfunc.argtypes = [ViSession, ctypes.POINTER(ViChar), ViInt32, ctypes.POINTER(ViReal64), ctypes.POINTER(ViInt32)]
            self.niDigital_FrequencyCounter_MeasureFrequency_cfunc.restype = ViStatus
    return self.niDigital_FrequencyCounter_MeasureFrequency_cfunc(vi, channel_list, frequencies_buffer_size, frequencies, actual_num_frequencies)
def niDigital_FrequencyCounter_MeasureFrequency(self, vi, channel_list, frequencies_buffer_size, frequencies, actual_num_frequencies):
    with self._func_lock:
        if (self.niDigital_FrequencyCounter_MeasureFrequency_cfunc is None):
            self.niDigital_FrequencyCounter_MeasureFrequency_cfunc = self._get_library_function('niDigital_FrequencyCounter_MeasureFrequency')
            self.niDigital_FrequencyCounter_MeasureFrequency_cfunc.argtypes = [ViSession, ctypes.POINTER(ViChar), ViInt32, ctypes.POINTER(ViReal64), ctypes.POINTER(ViInt32)]
            self.niDigital_FrequencyCounter_MeasureFrequency_cfunc.restype = ViStatus
    return self.niDigital_FrequencyCounter_MeasureFrequency_cfunc(vi, channel_list, frequencies_buffer_size, frequencies, actual_num_frequencies)