Function lwp_tid_put

components/lwp/lwp_tid.c:128–162

* @brief Releases a thread ID (TID) and associated resources * * @param[in] tid The thread ID to release * * @note This function performs thread-safe release of a TID by: * 1. Finding the TID in the AVL tree and removing it * 2. Adding the freed TID structure to the free list for reuse * 3. Handling thread reference counting and potential suspension */

 *        3. Handling thread reference counting and potential suspension
 */
void lwp_tid_put(int tid)
{
    struct lwp_avl_struct *p;
    rt_thread_t thread;
    rt_thread_t current;

    lwp_mutex_take_safe(&tid_lock, RT_WAITING_FOREVER, 0);
    p  = lwp_avl_find(tid, lwp_tid_root);
    if (p)
    {
        thread = p->data;
        p->data = RT_NULL;
        lwp_avl_remove(p, &lwp_tid_root);
        p->avl_right = lwp_tid_free_head;
        lwp_tid_free_head = p;
    }
    else
        thread = RT_NULL;

    if (thread && thread->tid_ref_count)
    {
        current = rt_thread_self();
        RT_ASSERT(thread->susp_recycler == RT_NULL);
        thread->susp_recycler = current;

        rt_enter_critical();
        rt_thread_suspend_with_flag(current, RT_UNINTERRUPTIBLE);
        lwp_mutex_release_safe(&tid_lock);
        rt_exit_critical();

        rt_schedule();
    }
    else
        lwp_mutex_release_safe(&tid_lock);
}

/**
 * @brief Retrieves the thread object associated with a thread ID (TID)