usbloadergx/source/utils/Callback.hpp

/****************************************************************************
 * Copyright (C) 2010
 * by Dimok
 *
 * This software is provided 'as-is', without any express or implied
 * warranty. In no event will the authors be held liable for any
 * damages arising from the use of this software.
 *
 * Permission is granted to anyone to use this software for any
 * purpose, including commercial applications, and to alter it and
 * redistribute it freely, subject to the following restrictions:
 *
 * 1. The origin of this software must not be misrepresented; you
 * must not claim that you wrote the original software. If you use
 * this software in a product, an acknowledgment in the product
 * documentation would be appreciated but is not required.
 *
 * 2. Altered source versions must be plainly marked as such, and
 * must not be misrepresented as being the original software.
 *
 * 3. This notice may not be removed or altered from any source
 * distribution.
 *
 * WiiXplorer 2010
 ***************************************************************************/
#ifndef _CPP_CALLBACK_HPP
#define _CPP_CALLBACK_HPP

class cCallback
{
    public:
        virtual void Execute(void * arg) const =0;
};

template <class cInstance>
class TCallback : public cCallback
{
    public:
        TCallback() : cInst(0), pFunction(0)    // constructor
        {
        }

        typedef void (cInstance::*tFunction)(void * arg);

        virtual void Execute(void * arg) const
        {
            if (pFunction)
                (cInst->*pFunction)(arg);
        }

        void SetCallback (cInstance * cInstancePointer, tFunction pFunctionPointer)
        {
            cInst     = cInstancePointer;
            pFunction = pFunctionPointer;
        }

    private:
        cInstance *cInst;
        tFunction pFunction;
};

#endif