Function _pthread_data_create

components/libc/posix/pthreads/pthread.c:109–142

* @brief Create and initialize a new thread data structure with index allocation * * This function allocates memory for a new thread data structure, initializes its default state, * and registers it in the global thread table. Uses spinlock synchronization to ensure safe * access to the global thread table in multi-threaded environments. * * @return Allocated index value of type pthread_t *

 *     - Magic number validation (PTHREAD_MAGIC) for structure integrity
 */
pthread_t _pthread_data_create(void)
{
    int index;
    _pthread_data_t *ptd = NULL;

    ptd = (_pthread_data_t*)rt_malloc(sizeof(_pthread_data_t));
    if (!ptd) return PTHREAD_NUM_MAX;

    memset(ptd, 0x0, sizeof(_pthread_data_t));
    ptd->canceled = 0;
    ptd->cancelstate = PTHREAD_CANCEL_DISABLE;
    ptd->canceltype = PTHREAD_CANCEL_DEFERRED;
    ptd->magic = PTHREAD_MAGIC;

    rt_hw_spin_lock(&pth_lock);
    for (index = 0; index < PTHREAD_NUM_MAX; index ++)
    {
        if (pth_table[index] == NULL)
        {
            pth_table[index] = ptd;
            break;
        }
    }
    rt_hw_spin_unlock(&pth_lock);

    /* full of pthreads, clean magic and release ptd */
    if (index == PTHREAD_NUM_MAX)
    {
        ptd->magic = 0x0;
        rt_free(ptd);
    }

    return index;
}

/**
 * @brief Destroy thread local storage item at specified index