Function thread_key_create

thread/thread-key.cpp:60–72

static thread_key_struct thread_keys[THREAD_KEYS_MAX] = {};

int thread_key_create(thread_key_t* key, void (* destr)(void*)) {
    for (uint64_t index = 0; index < THREAD_KEYS_MAX; ++index) {
        /* Find a slot in thread_keys which is unused. */
        uint64_t seq = thread_keys[index].seq;
        if (key_unused(seq) && key_usable(seq) &&
            __sync_bool_compare_and_swap(&thread_keys[index].seq, seq, seq + 1)) {
            thread_keys[index].dtor = destr;
            *key = index;
            return 0;
        }
    }
    return EAGAIN;
}

void* thread_getspecific(thread_key_t key) {
    auto tls = (thread_local_storage*) (((partial_thread*) CURRENT)->tls);