Function lwp_thread_signal_kill

components/lwp/lwp_signal.c:1193–1252

}

rt_err_t lwp_thread_signal_kill(rt_thread_t thread, long signo, long code, lwp_siginfo_ext_t value)
{
    rt_err_t ret = -1;

    struct rt_lwp *lwp;
    lwp_siginfo_t siginfo;
    rt_bool_t need_schedule;

    /** must be able to be suspended */
    RT_DEBUG_SCHEDULER_AVAILABLE(RT_TRUE);

    LOG_D("%s(signo=%d)", __func__, signo);

    if (!thread || signo < 0 || signo >= _LWP_NSIG)
    {
        ret = -RT_EINVAL;
    }
    else if (signo == 0)
    {
        /* thread exist and current thread have privileges */
        ret = 0;
    }
    else
    {
        lwp = thread->lwp;
        need_schedule = RT_FALSE;

        RT_ASSERT(lwp);

        LWP_LOCK(lwp);

        if (!lwp)
            ret = -RT_EPERM;
        else if (lwp->terminated || _sighandler_is_ignored(lwp, signo))
            ret = 0;
        else
        {
            siginfo = siginfo_create(rt_thread_self(), signo, code, value);

            if (siginfo)
            {
                need_schedule = _siginfo_deliver_to_thread(thread, siginfo);
                lwp_signal_notify(&lwp->signalfd_notify_head, siginfo);
                ret = 0;
            }
            else
            {
                LOG_I("%s: siginfo malloc failed", __func__);
                ret = -RT_ENOMEM;
            }
        }

        LWP_UNLOCK(lwp);

        if (need_schedule)
            rt_schedule();
    }