Function _pthread_data_destroy

components/libc/posix/pthreads/pthread.c:205–271

* @brief Destroy and clean up a thread data structure along with associated resources * * This function releases all resources associated with a thread data structure including: * - Thread-local storage (TLS) destructors execution * - Joinable semaphore deletion * - Global thread table entry cleanup * - Memory deallocation after proper resource release * * @param ptd Pointer to the thread

 *   - Thread-safe operation through spinlock protection during critical sections
 */
void _pthread_data_destroy(_pthread_data_t *ptd)
{
    pthread_t pth;

    if (ptd)
    {
        /* if this thread create the local thread data,
         * destruct thread local key
         */
        if (ptd->tls != RT_NULL)
        {
            int index;
#ifdef RT_USING_CPLUSPLUS11
            /* If C++11 is enabled and emutls is used,
             * destructors of C++ object must be called safely.
             */
            extern pthread_key_t emutls_get_pthread_key(void);
            pthread_key_t emutls_pthread_key = emutls_get_pthread_key();

            if (emutls_pthread_key != NOT_USE_CXX_TLS)
            {
                /* If execution reaches here, C++ 'thread_local' may be used.
                 * Destructors of c++ class object must be called before emutls_key_destructor.
                 */
                int start = ((emutls_pthread_key - 1 + PTHREAD_KEY_MAX) % PTHREAD_KEY_MAX);
                int i = 0;
                for (index = start; i < PTHREAD_KEY_MAX; index = (index - 1 + PTHREAD_KEY_MAX) % PTHREAD_KEY_MAX, i ++)
                {
                    _destroy_item(index, ptd);
                }
            }
            else
#endif
            {
                /* If only C TLS is used, that is, POSIX TLS or __Thread_local,
                 * just iterate the _thread_keys from index 0.
                 */
                for (index = 0; index < PTHREAD_KEY_MAX; index ++)
                {
                    _destroy_item(index, ptd);
                }
            }
            /* release tls area */
            rt_free(ptd->tls);
            ptd->tls = RT_NULL;
        }

        pth  = _pthread_data_get_pth(ptd);
        /* remove from pthread table */
        rt_hw_spin_lock(&pth_lock);
        pth_table[pth] = NULL;
        rt_hw_spin_unlock(&pth_lock);

        /* delete joinable semaphore */
        if (ptd->joinable_sem != RT_NULL)
        {
            rt_sem_delete(ptd->joinable_sem);
            ptd->joinable_sem = RT_NULL;