Function rt_pipe_close

components/drivers/ipc/pipe.c:463–479

* @brief This function will close the pipe and release the pipe buffer. * * @param device is a pointer to the pipe device descriptor. * * @return Return the operation status. * When the return value is RT_EOK, the operation is successful. * When the return value is -RT_EINVAL, it means the device handle is empty. */

 *           When the return value is -RT_EINVAL, it means the device handle is empty.
 */
rt_err_t rt_pipe_close(rt_device_t device)
{
    rt_pipe_t *pipe = (rt_pipe_t *)device;

    if (device == RT_NULL)
    {
        return -RT_EINVAL;
    }
    rt_mutex_take(&pipe->lock, RT_WAITING_FOREVER);

    rt_ringbuffer_destroy(pipe->fifo);
    pipe->fifo = RT_NULL;

    rt_mutex_release(&pipe->lock);

    return RT_EOK;
}

/**
 * @brief    This function will read the specified length of data from the pipe.