Function rt_ringbuffer_putchar_force

components/drivers/ipc/ringbuffer.c:305–334

* @brief Put a byte into the ring buffer. If ring buffer is full, it will discard an old data and put into a new data. * * @param rb A pointer to the ring buffer object. * @param ch A byte put into the ring buffer. * * @return Return the data size we put into the ring buffer. Always return 1. */

 * @return Return the data size we put into the ring buffer. Always return 1.
 */
rt_size_t rt_ringbuffer_putchar_force(struct rt_ringbuffer *rb, const rt_uint8_t ch)
{
    enum rt_ringbuffer_state old_state;

    RT_ASSERT(rb != RT_NULL);

    old_state = rt_ringbuffer_status(rb);

    rb->buffer_ptr[rb->write_index] = ch;

    /* flip mirror */
    if (rb->write_index == rb->buffer_size - 1)
    {
        rb->write_mirror = ~rb->write_mirror;
        rb->write_index = 0;
        if (old_state == RT_RINGBUFFER_FULL)
        {
            rb->read_mirror = ~rb->read_mirror;
            rb->read_index = rb->write_index;
        }
    }
    else
    {
        rb->write_index++;
        if (old_state == RT_RINGBUFFER_FULL)
            rb->read_index = rb->write_index;
    }

    return 1;
}
RTM_EXPORT(rt_ringbuffer_putchar_force);

/**