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  1. #include <stdlib.h>
  2. #include <stdio.h>
  3. #include <iostream>
  4. #include <map>
  5.  
  6. class Callback {
  7. public:
  8.     Callback(const char *message) : message(message) {
  9. 	}
  10.  
  11. 	void callbackMethod() {
  12. 		std::cout << message << std::endl;
  13. 	}
  14.  
  15. private:
  16. 	const char *message;
  17. };
  18.  
  19. template<typename T>
  20. class Worker {
  21. public:
  22. 	typedef void (T::*CALLBACK_METHOD)();
  23.  
  24. 	void registerCallback(T *callbackObj, CALLBACK_METHOD callbackMethod) {
  25. 		callbacks.insert(callbacks.end(), std::pair<T *, CALLBACK_METHOD>(callbackObj, callbackMethod));
  26. 	}
  27.  
  28. 	void executeCallbacks() {
  29. 		for (typename std::map<T *, CALLBACK_METHOD>::const_iterator iter = callbacks.begin(); iter != callbacks.end(); ++iter) {
  30. 			((*iter).first->*((*iter).second))();
  31. 		}
  32. 	}
  33.  
  34. private:
  35. 	std::map<T *, CALLBACK_METHOD> callbacks;
  36. };
  37.  
  38. int main(int argc, char **argv) {
  39. 	Callback firstCallback("first callback called");
  40. 	Callback secondCallback("second callback called");
  41.  
  42. 	Worker<Callback> worker;
  43. 	worker.registerCallback(&firstCallback, &Callback::callbackMethod);
  44. 	worker.registerCallback(&secondCallback, &Callback::callbackMethod);
  45. 	worker.executeCallbacks();
  46.  
  47. 	return EXIT_SUCCESS;
  48. }
Success #stdin #stdout 0s 3476KB
comments (?)
stdin 
Standard input is empty
stdout 
first callback called
second callback called
https://ideone.com/GCvt1U
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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