Function rt_ringbuffer_getchar

components/drivers/ipc/ringbuffer.c:346–368

* @brief Get a byte from the ring buffer. * * @param rb The pointer to the ring buffer object. * @param ch A pointer to the buffer, used to store one byte. * * @return 0 The ring buffer is empty. * @return 1 Success */

 * @return 1    Success
 */
rt_size_t rt_ringbuffer_getchar(struct rt_ringbuffer *rb, rt_uint8_t *ch)
{
    RT_ASSERT(rb != RT_NULL);

    /* ringbuffer is empty */
    if (!rt_ringbuffer_data_len(rb))
        return 0;

    /* put byte */
    *ch = rb->buffer_ptr[rb->read_index];

    if (rb->read_index == rb->buffer_size - 1)
    {
        rb->read_mirror = ~rb->read_mirror;
        rb->read_index = 0;
    }
    else
    {
        rb->read_index++;
    }

    return 1;
}
RTM_EXPORT(rt_ringbuffer_getchar);

/**