watrbx-game-engine/iOS/SharedCode/FunctionMarshaller.h

// This file is used for two targets:
// 1. Used in Mac Roblox Player app, this is the place where actual file resides
// 2. Used in Qt version of Roblox Studio as a soft link from above

#pragma once

#ifdef _WIN32
// This code is platform-specific
#error
#endif

#include <map>
#include "rbx/threadsafe.h"
#include "rbx/CEvent.h"

namespace RBX { 

	// A very handy class for marshalling a function across Windows threads (sync and async)
	class FunctionMarshaller
{
public:

private:
	struct StaticData
	{
		std::map<DWORD, FunctionMarshaller*> windows;
		boost::recursive_mutex windowsCriticalSection;	// TODO: Would non-recursive be safe here?
		~StaticData();
	};
	SAFE_STATIC(StaticData, staticData)

	rbx::safe_queue<boost::function<void()>*> asyncCalls;

    int refCount;
	DWORD threadID;
	FunctionMarshaller(DWORD threadID);


	~FunctionMarshaller();
public:
	// TODO: Wrap with a reference counter and then remove ~StaticData() cleanup code and remove ReleaseWindow()
	static FunctionMarshaller* GetWindow();
	static void ReleaseWindow(FunctionMarshaller* window);
	
	static void handleAppEvent(void *pClosure);
	static void freeAppEvent(void *pClosure);
	
	struct Closure
	{
		boost::function<void()>* f;
		std::string errorMessage;
		RBX::CEvent *waitEvent;
	};

	void Execute(boost::function<void()> job, CEvent *waitEvent);
	void Submit(boost::function<void()> job);

	// Call this only from the Window's thread
	void ProcessMessages();

	// virtual void OnFinalMessage(HWND hWnd);
	
private:
	// LRESULT OnEvent(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
	// LRESULT OnAsyncEvent(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
};


}