watchdog.py 文件源码

def expired(self):
        """
        bool: Indicates if the watchdog timer expired. You can read this
            property only while the task is running.
        """
        val = c_bool32()

        cfunc = lib_importer.windll.DAQmxGetWatchdogHasExpired
        if cfunc.argtypes is None:
            with cfunc.arglock:
                if cfunc.argtypes is None:
                    cfunc.argtypes = [
                        lib_importer.task_handle, ctypes.POINTER(c_bool32)]

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

        return val.value