Method pop

capstone/sensor_pipeline.hpp:51–62

Consumer: pop with blocking wait (Module 08: std::optional)

    // Consumer: pop with blocking wait (Module 08: std::optional)
    [[nodiscard]] std::optional<T> pop() {
        std::unique_lock<std::mutex> lock(mux_);
        cv_data_.wait(lock, [this] { return count_ > 0 || !active_; });
        if (count_ == 0) return std::nullopt; // Shutdown signal

        T item = buffer_[head_];
        head_ = (head_ + 1) % N;
        --count_;
        lock.unlock();
        cv_space_.notify_one();
        return item;
    }

    void shutdown() {
        {