Ревью: очередь задач и рабочий поток

class Worker {
public:
    void start() {
        std::thread([this] { loop(); }).detach();
    }
    void post(std::function<void()> task) {
        queue_.push(std::move(task));
        cv_.notify_one();
    }
    void stop() { stopped_ = true; cv_.notify_all(); }
    int processed() const { return processed_; }
private:
    void loop() {
        while (!stopped_) {
            std::unique_lock lock(m_);
            cv_.wait(lock);
            auto task = std::move(queue_.front());
            queue_.pop();
            task();
            ++processed_;
        }
    }
    std::queue<std::function<void()>> queue_;
    std::mutex m_;
    std::condition_variable cv_;
    bool stopped_ = false;
    int processed_ = 0;
};

void transfer(Account& a, Account& b, int x) {
    std::lock_guard l1(a.m);
    std::lock_guard l2(b.m);
    a.balance -= x;
    b.balance += x;
}