Pass (const) reference not copy of listener and sender lists

Resolves #246

src/sacn/streamingacn.h

@@ -46,6 +46,59 @@ enum StreamingACNProtocolVersion
     sACNProtocolRelease,
 };
 
+// The sACNManager class is a singleton that manages the lifespan of sACNTransmitters and sACNListeners.
+class sACNManager : public QObject
+{
+    Q_OBJECT
+public:
+    static sACNManager *getInstance();
+
+    typedef QSharedPointer<sACNListener> tListener;
+    typedef QSharedPointer<sACNSentUniverse> tSender;
+
+public slots:
+    void listenerDelete(QObject *obj = Q_NULLPTR);
+
+    void senderDelete(QObject *obj = Q_NULLPTR);
+private:
+    sACNManager();
+    static sACNManager *m_instance;
+    QMutex sACNManager_mutex;
+
+    QHash<QObject*, quint16> m_objToUniverse;
+    QHash<QObject*, CID> m_objToCid;
+
+    QHash<quint16, QWeakPointer<sACNListener>> m_listenerHash;
+    QHash<quint16, QThread *> m_listenerThreads;
+
+    tSender createSender(CID cid, quint16 universe);
+    QHash<CID, QHash<quint16, QWeakPointer<sACNSentUniverse>> > m_senderHash;
+
+public:
+    tListener getListener(quint16 universe);
+    const decltype(m_listenerHash) &getListenerList() { return m_listenerHash; }
+
+    tSender getSender(quint16 universe, CID cid = CID::CreateCid());
+    const decltype(m_senderHash) &getSenderList() { return m_senderHash; }
+
+signals:
+    void newSender();
+    void deletedSender(CID cid, quint16 universe);
+
+    void newListener(quint16 universe);
+    void deletedListener(quint16 universe);
+
+    void sourceFound(quint16 universe, sACNSource *source);
+    void sourceLost(quint16 universe, sACNSource *source);
+    void sourceResumed(quint16 universe, sACNSource *source);
+    void sourceChanged(quint16 universe, sACNSource *source);
+
+private slots:
+    void senderUniverseChanged();
+    void senderCIDChanged();
+
+private:
+};
 
 class sACNSource : public QObject
 {