processpolicy.h

封装的http和文件存取的c++类例子

#ifndef _PROC_PLCY_h_
#define _PROC_PLCY_h_


struct ConnectionPolicy
{
	static bool isReusable()
	{
		return true;
	}
	
};




template <class Y, class F>
struct pkCBK0
{

	void setCallback(Y* y, F fx)
	{
		y_ = y;
		f_ = fx;
	}
	
	static void callbackHandler(void* v)
	{
		
		typedef pkCBK0<Y,F> pk;
		pk* z = static_cast<pk*>(v);
		F fx = z->f_;
		Y* y = z->y_;
		(*y.*fx)();
	}
	
	
	Y* y_;
	F f_;
};


template <class Y, class F>
struct pkCBK1
{

	void setCallback(Y* y, F fx)
	{
		y_ = y;
		f_ = fx;
	}
	
	template <class Z>
	static void callbackHandler(void* v, Z me)
	{
		
		typedef pkCBK1<Y,F> pk;
		pk* z = static_cast<pk*>(v);
		F fx = z->f_;
		Y* y = z->y_;
		(*y.*fx)(me);
	}

	Y* y_;
	F f_;
};

template <class Y>
struct pkAEECBK 
{
	typedef void (Y::*FNX)( );
	void setCallback(Y* y, FNX fx, IShell* shell)
	{
		y_ = y;
		f_ = fx;
		shell_ = shell;
	}
	
	static void callbackHandler(void* v)
	{
		typedef pkAEECBK<Y> pk;
		pk* z = static_cast<pk*>(v);
		typedef void (Y::*FNX)();
		FNX fx = z->f_;
		Y* y = z->y_;
		(*y.*fx)();
	}

	void operator()()
	{
		cb_.pfnNotify = (PFNNOTIFY)callbackHandler; 
		cb_.pNotifyData = this; 
		cb_.pfnCancel = NULL; 
		ISHELL_Resume(shell_,&cb_);
	}
	
	template <class U, class R>
	static U& initCbk(R* rr, Y* me, FNX  onEndCbk, IShell* shell, Type2Type<U>  )
	{
		U* prp = static_cast<U*>(rr->getRegistered(U::getID()));
		if (!prp)
			prp = new U;
		U& pr = *prp;
		pr.setCallback(me, onEndCbk, shell);
		rr->registerResource(prp);
		return pr;
	}

	AEECallback cb_;
	Y* y_;
	FNX f_;
	IShell* shell_;
};





#endif