Function rt_dm_ida_alloc

components/drivers/core/dm.c:63–85

* @brief This function will alloc an id in an IDA object * * @param ida is the IDA object * * @return the id or -RT_EEMPTY */

 * @return the id or -RT_EEMPTY
 */
int rt_dm_ida_alloc(struct rt_dm_ida *ida)
{
    int id;
    RT_ASSERT(ida != RT_NULL);

    rt_spin_lock(&ida->lock);

    id = rt_bitmap_next_clear_bit(ida->map, 0, RT_DM_IDA_NUM);

    if (id != RT_DM_IDA_NUM)
    {
        rt_bitmap_set_bit(ida->map, id);
    }

    rt_spin_unlock(&ida->lock);

    if (id != RT_DM_IDA_NUM)
    {
        return id;
    }

    return -RT_EEMPTY;
}

/**
 * @brief This function will take (force) an id in an IDA object