producer–consumer.cpp

template <typename T>
class producer_consumer_queue {
public:
  void put(T &&data) {
    std::unique_lock lock{_mtx};
    _queue.push(std::move(data));
    _cv.notify_one();
  }

  T get() {
    std::unique_lock lock{_mtx};
    _cv.wait(lock, [this] { return !_queue.empty(); });
    auto data = std::move(_queue.front());
    _queue.pop();
    return data;
  }

private:
  std::condition_variable _cv;
  std::mutex _mtx;
  std::queue<T> _queue;
};