out_stream.py 文件源码

def output_buf_size(self):
        """
        int: Specifies the number of samples the output buffer can hold
            for each channel in the task. Zero indicates to allocate no
            buffer. Use a buffer size of 0 to perform a hardware-timed
            operation without using a buffer. Setting this property
            overrides the automatic output buffer allocation that NI-
            DAQmx performs.
        """
        val = ctypes.c_uint()

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

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

        return val.value