Function bthread_id_join

src/bthread/id.cpp:513–536

}

int bthread_id_join(bthread_id_t id) {
    const bthread::IdResourceId slot = bthread::get_slot(id);
    bthread::Id* const meta = address_resource(slot);
    if (!meta) {
        // The id is not created yet, this join is definitely wrong.
        return EINVAL;
    }
    const uint32_t id_ver = bthread::get_version(id);
    uint32_t* join_butex = meta->join_butex;
    while (1) {
        meta->mutex.lock();
        const bool has_ver = meta->has_version(id_ver);
        const uint32_t expected_ver = *join_butex;
        meta->mutex.unlock();
        if (!has_ver) {
            break;
        }
        if (bthread::butex_wait(join_butex, expected_ver, NULL) < 0 &&
            errno != EWOULDBLOCK && errno != EINTR) {
            return errno;
        }
    }
    return 0;
}

int bthread_id_trylock(bthread_id_t id, void** pdata) {
    bthread::Id* const meta = address_resource(bthread::get_slot(id));