QueueReceiverModel.hpp

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#ifndef IOMANAGER_INCLUDE_IOMANAGER_QUEUE_QUEUERECEIVERMODEL_HPP_
#define IOMANAGER_INCLUDE_IOMANAGER_QUEUE_QUEUERECEIVERMODEL_HPP_
 
#include "iomanager/Receiver.hpp"
#include "iomanager/queue/Queue.hpp"
 
#include "logging/Logging.hpp"
 
#include <atomic>
#include <memory>
#include <optional>
#include <string>
#include <thread>
 
namespace dunedaq::iomanager {
 
// QImpl
template<typename Datatype>
class QueueReceiverModel : public ReceiverConcept<Datatype>
{
public:
  explicit QueueReceiverModel(ConnectionId const& request);
 
  QueueReceiverModel(QueueReceiverModel&& other);
 
  ~QueueReceiverModel() { remove_callback(); }
 
  Datatype receive(Receiver::timeout_t timeout) override;
 
  std::optional<Datatype> try_receive(Receiver::timeout_t timeout) override;
 
  bool data_pending() override { return m_queue && m_queue->can_pop(); }
 
  void add_callback(std::function<void(Datatype&)> callback) override;
 
  void remove_callback() override;
 
  // Topics are not used for Queues
  void subscribe(std::string) override {}
  void unsubscribe(std::string) override {}
 
private:
  std::function<void(Datatype&)> m_callback;
  std::unique_ptr<std::jthread> m_event_loop_runner;
  std::shared_ptr<Queue<Datatype>> m_queue;
};
 
} // namespace dunedaq::iomanager
 
#include "detail/QueueReceiverModel.hxx"
 
#endif // IOMANAGER_INCLUDE_IOMANAGER_QUEUE_QUEUERECEIVERMODEL_HPP_