Method sync

src/core/impl/utils/thread_pool.cpp:117–131

}

void ThreadPool::sync() {
    bool no_finished = false;
    do {
        no_finished = false;
        for (uint32_t i = 0; i < m_nr_threads - 1; ++i) {
            if (m_workers[i]->work_flag) {
                no_finished = true;
                break;
            }
        }
        if (no_finished) {
            std::this_thread::yield();
        }
    } while (no_finished);
}
void ThreadPool::active() {
    if (!m_active) {
        std::unique_lock<std::mutex> lock(m_mutex);