Signals.h

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#pragma once
 
#include "SmartPointer.h"
#include "ScriptFunc.h"
#include "Datum.h"
 
#include <unordered_map>
 
class Node;
 
typedef void (*SignalHandlerFP)(Node*, const std::vector<Datum>&);
 
struct SignalHandlerFunc
{
    SignalHandlerFP mFuncPointer = nullptr;
    mutable ScriptFunc mScriptFunc;
};
 
class Signal
{
public:
 
    void Emit(const std::vector<Datum>& args);
    void Connect(Node* node, SignalHandlerFP func);
    void Connect(Node* node, const ScriptFunc& func);
    void Disconnect(Node* node);
 
private:
 
    void CleanupDeadConnections();
 
    std::unordered_map<NodePtrWeak, SignalHandlerFunc> mConnectionMap;
    std::vector <std::pair<NodePtrWeak, SignalHandlerFunc>> mPendingConnects;
    std::vector <NodePtrWeak> mPendingDisconnects;
    bool mEmitting = false;
 
};