Method with_lock

util/thread/pool.cpp:463–475

    inline void Add(IObjectInQueue* obj) {
        with_lock (Mutex_) {
            while (Obj_ != nullptr) {
                CondFree_.Wait(Mutex_);
            }

            if (Free_ == 0) {
                AddThreadNoLock();
            }

            Obj_ = obj;

            Y_ENSURE_EX(!AllDone_, TThreadPoolException() << TStringBuf("adding to a stopped queue"));
        }

        CondReady_.Signal();
    }