Function lwp_signal_kill

components/lwp/lwp_signal.c:991–1055

}

rt_err_t lwp_signal_kill(struct rt_lwp *lwp, long signo, long code, lwp_siginfo_ext_t value)
{
    rt_err_t ret = -1;

    lwp_siginfo_t siginfo;
    rt_bool_t terminated;
    rt_bool_t need_schedule;

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

    if (!lwp || signo < 0 || signo > _LWP_NSIG)
    {
        ret = -RT_EINVAL;
    }
    else if (signo == 0)
    {
        /* process exist and current process have privileges */
        ret = 0;
    }
    else
    {
        LOG_D("%s(lwp=%p \"%s\",signo=%ld,code=%ld,value=%ld)",
              __func__, lwp, lwp->cmd, signo, code, value);

        need_schedule = RT_FALSE;

        LWP_LOCK(lwp);
        terminated = lwp->terminated;

        /* short-circuit code for inactive task, ignored signals */
        if (terminated)
        {
            /* no one rely on this, then free the resource */
            if (value)
                rt_free(value);
            ret = 0;
        }
        else
        {
            siginfo = siginfo_create(rt_thread_self(), signo, code, value);

            if (siginfo)
            {
                if (_is_jobctl_signal(lwp, signo))
                    _before_sending_jobctl_signal(signo, lwp, siginfo);

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