Function lwp_exit

components/lwp/lwp_pid.c:855–902

* @brief Terminates a lightweight process and cleans up its resources * * @param[in,out] lwp The lightweight process to terminate * @param[in] status The exit status to set for the process * * @note This function handles both MMU and non-MMU architectures differently. * For MMU architectures, it clears child TID, sets exit status, and terminates. * For non-MMU, it terminates the

 *       For non-MMU, it terminates the main thread and all subthreads.
 */
void lwp_exit(rt_lwp_t lwp, lwp_status_t status)
{
    rt_thread_t thread;

    if (!lwp)
    {
        LOG_W("%s: lwp should not be null", __func__);
        return ;
    }

    thread = rt_thread_self();
    RT_ASSERT((struct rt_lwp *)thread->lwp == lwp);
    LOG_D("process(lwp.pid=%d) exit", lwp->pid);

#ifdef ARCH_MM_MMU
    _clear_child_tid(thread);

    LWP_LOCK(lwp);
    /**
     * Brief: only one thread should calls exit_group(),
     * but we can not ensured that during run-time
     */
    lwp->lwp_status = status;
    LWP_UNLOCK(lwp);

    lwp_terminate(lwp);
#else
    main_thread = rt_list_entry(lwp->t_grp.prev, struct rt_thread, sibling);
    if (main_thread == tid)
    {
        rt_thread_t sub_thread;
        rt_list_t *list;

        lwp_terminate(lwp);

        /* delete all subthread */
        while ((list = tid->sibling.prev) != &lwp->t_grp)
        {
            sub_thread = rt_list_entry(list, struct rt_thread, sibling);
            rt_list_remove(&sub_thread->sibling);
            rt_thread_delete(sub_thread);
        }
        lwp->lwp_ret = value;
    }
#endif /* ARCH_MM_MMU */

    _thread_exit(lwp, thread);
}

/**
 * @brief Handles thread exit for a lightweight process