Function rt_thread_kill

src/signal.c:593–669

* @ingroup group_thread_management * * @brief This function can be used to send any signal to any thread. * * @param tid is a pointer to the thread that receives the signal. * * @param sig is a specific signal value (range: 0 ~ RT_SIG_MAX). * * @return Return the operation status. When the return value is RT_EOK, the operation is successful. * If the return value is a

 *           If the return value is any other values, it means that the signal send failed.
 */
int rt_thread_kill(rt_thread_t tid, int sig)
{
    siginfo_t si;
    rt_base_t level;
    struct siginfo_node *si_node;

    RT_ASSERT(tid != RT_NULL);
    if (!sig_valid(sig)) return -RT_EINVAL;

    LOG_I("send signal: %d", sig);
    si.si_signo = sig;
    si.si_code  = SI_USER;
    si.si_value.sival_ptr = RT_NULL;

    level = rt_spin_lock_irqsave(&_thread_signal_lock);
    if (tid->sig_pending & sig_mask(sig))
    {
        /* whether already emits this signal? */
        struct rt_slist_node *node;
        struct siginfo_node  *entry;

        si_node = (struct siginfo_node *)tid->si_list;
        if (si_node)
            node = (struct rt_slist_node *)&si_node->list;
        else
            node = RT_NULL;

        /* update sig info */
        for (; (node) != RT_NULL; node = node->next)
        {
            entry = rt_slist_entry(node, struct siginfo_node, list);
            if (entry->si.si_signo == sig)
            {
                memcpy(&(entry->si), &si, sizeof(siginfo_t));
                rt_spin_unlock_irqrestore(&_thread_signal_lock, level);
                return 0;
            }
        }
    }
    rt_spin_unlock_irqrestore(&_thread_signal_lock, level);

    si_node = (struct siginfo_node *) rt_mp_alloc(_siginfo_pool, 0);
    if (si_node)
    {
        rt_slist_init(&(si_node->list));
        memcpy(&(si_node->si), &si, sizeof(siginfo_t));

        level = rt_spin_lock_irqsave(&_thread_signal_lock);

        if (tid->si_list)
        {
            struct siginfo_node *si_list;

            si_list = (struct siginfo_node *)tid->si_list;
            rt_slist_append(&(si_list->list), &(si_node->list));
        }
        else
        {