Function thread_yield

thread/thread.cpp:1301–1309

    }

    int thread_yield()
    {
        RunQ rq;
        if_update_now();
        rq.current->error_number = 0;
        auto sw = AtomicRunQ(rq).goto_next();
        switch_context(sw.from, sw.to);
        return rq.current->error_number;
    }

    inline void thread_yield_fast() {
        auto sw = AtomicRunQ().goto_next();