Function pthread_getspecific

components/libc/posix/pthreads/pthread_tls.c:49–66

* @brief Retrieves the value associated with a thread-specific data key for the calling thread. * * This function returns the value that was previously set for the specified key * in the calling thread using `pthread_setspecific`. Each thread has its own independent * value for the same key. * * @param[in] key * The thread-specific data key, created using `pthread_key_create`. * * @re

 * @see pthread_key_create(), pthread_setspecific(), pthread_key_delete()
 */
void *pthread_getspecific(pthread_key_t key)
{
    struct _pthread_data* ptd;

    if (rt_thread_self() == NULL) return NULL;

    /* get pthread data from user data of thread */
    ptd = (_pthread_data_t *)rt_thread_self()->pthread_data;
    RT_ASSERT(ptd != NULL);

    if (ptd->tls == NULL)
        return NULL;

    if ((key < PTHREAD_KEY_MAX) && (_thread_keys[key].is_used))
        return ptd->tls[key];

    return NULL;
}
RTM_EXPORT(pthread_getspecific);

/**