Function rt_pic_detach_irq

components/drivers/pic/pic.c:419–485

}

rt_err_t rt_pic_detach_irq(int irq, void *uid)
{
    rt_err_t err = -RT_EINVAL;
    struct rt_pic_irq *pirq = irq2pirq(irq);

    if (pirq)
    {
        rt_bool_t will_free = RT_FALSE;
        struct rt_pic_isr *isr = RT_NULL;
        rt_ubase_t level = rt_spin_lock_irqsave(&pirq->rw_lock);

        isr = &pirq->isr;

        if (isr->action.param == uid)
        {
            if (rt_list_isempty(&isr->list))
            {
                isr->action.handler = RT_NULL;
                isr->action.param = RT_NULL;
            }
            else
            {
                struct rt_pic_isr *next_isr = rt_list_first_entry(&isr->list, struct rt_pic_isr, list);

                rt_list_remove(&next_isr->list);

                isr->action.handler = next_isr->action.handler;
                isr->action.param = next_isr->action.param;
            #ifdef RT_USING_INTERRUPT_INFO
                isr->action.counter = next_isr->action.counter;
                rt_strncpy(isr->action.name, next_isr->action.name, RT_NAME_MAX);
            #ifdef RT_USING_SMP
                rt_memcpy(isr->action.cpu_counter, next_isr->action.cpu_counter, sizeof(next_isr->action.cpu_counter));
            #endif
            #endif

                isr = next_isr;
                will_free = RT_TRUE;
            }

            err = RT_EOK;
        }
        else
        {
            rt_list_for_each_entry(isr, &pirq->isr.list, list)
            {
                if (isr->action.param == uid)
                {
                    err = RT_EOK;

                    will_free = RT_TRUE;
                    rt_list_remove(&isr->list);
                    break;
                }
            }
        }

        rt_spin_unlock_irqrestore(&pirq->rw_lock, level);