Method wait

library/PluginManager.cpp:118–125

        mut->unlock();
    }
    void wait()
    {
        std::unique_lock<std::mutex> lock{*mut,  std::defer_lock};
        while(refcount)
        {
            wakeup->wait(lock);
        }
    }
    std::condition_variable * wakeup;
    std::mutex * mut;
    int refcount;