EventCallback.h

00001 /*
00002     EventCallback.h 
00003     Copyright (c) Donatien Garnier 2012
00004     donatien.garnier@appnearme.com
00005     http://www.appnearme.com/
00006 */
00007 
00008 
00009 #ifndef EVENTCALLBACK_H_
00010 #define EVENTCALLBACK_H_
00011 
00012 #include "NFCEvent.h"
00013 
00014 #include "munfc/core/fwk.h"
00015 #include "munfc/event/transaction_event.h"
00016 
00017 class EventCallback
00018 {
00019 protected:
00020   EventCallback();
00021 
00022   void init( void (*fn)(transaction_event_callback, void*) ); //Callable by MuNFC
00023 
00024   void attach(void (*fn)(NFCEvent, void*), void* arg);
00025 
00026   template <class T>
00027   void attach(T* inst, void (T::*member)(NFCEvent))
00028   {
00029     m_fn = NULL;
00030     m_inst = inst;
00031     memcpy(m_pMember, (char*)&member, sizeof(member));
00032     m_caller = &EventCallback::memberCaller<T>;
00033   }
00034 
00035 
00036 private:
00037   void callback(transaction_event event, transaction_type type);
00038 
00039   //Function
00040   void(*m_fn)(NFCEvent, void*);
00041   void* m_arg;
00042 
00043 
00044   //Member of object instance
00045   void* m_inst;
00046   char m_pMember[16];
00047   void (*m_caller)(EventCallback*, NFCEvent);
00048 
00049   template <class T>
00050   static inline void memberCaller(EventCallback* p, NFCEvent event)
00051   {
00052     T* inst = (T*) p->m_inst;
00053     void (T::*member)(NFCEvent);
00054     memcpy(&member, p->m_pMember, sizeof(member));
00055     (inst->*member)(event);
00056   }
00057 
00058   static void staticCallback(transaction_event event, transaction_type type, void* param);
00059 
00060   friend class MuNFC;
00061 };
00062 
00063 
00064 
00065 #endif /* EVENTCALLBACK_H_ */