創建擴展性良好的框架-通知框架(實現)

       一般來說通知框架可以有效的解耦業務邏輯，就類似於訂閱者模式，任何模塊都可以註冊自己關注的接口，接口事件發生時會主動通知該模塊。

  通知框架向外部提供的宏:

//註冊通知
#define LISTEN(INotify)\
AddInterface(#INotify, (void*)(INotify*)this);

//去除通知
#define UNLISTEN(INotify)\
RemoveInterface(#INotify, (void*)(INotify*)this);

//分發通知
#define NOTIFY(INotify, function)\
ActiveNotifyInstance(#INotify);\
for(int i=0; i< GetInterfaceCount(#INotify); ++i)\
{\
   INotify* pInterface = (INotify*)(GetInterface(#INotify, i));\
   if (nullptr != pInterface)\
      {\
      pInterface->function;\
      }\
}\

  接口實現:

// CoreCenter.cpp : 定義 DLL 應用程序的導出函數。
//

#include "CoreCenterDefine.h"
#include <map>
#include <vector>
#include <string>
typedef std::map<std::string, std::vector<void*> > TypeCoreMap;
namespace
{
	TypeCoreMap _coreNotify;
}

void* GetInterface(const char* strNotify, int index)
{
	return _coreNotify[strNotify][index];
}

int GetInterfaceCount(const char* strNotify)
{
	auto iter = _coreNotify.find(strNotify);
	if (iter != _coreNotify.end())
	{
		std::vector<void*>& vecInterfaces = iter->second;
		return vecInterfaces.size();
	}
	return 0;
}

void AddInterface(const char* strNotify, void* pNotifyObject)
{
	std::vector<void*>& vecInterfaces = _coreNotify[strNotify];
	vecInterfaces.push_back(pNotifyObject);
}

void RemoveInterface(const char* strNotify, void* pNotifyObject)
{
	if (_coreNotify.empty())
	{
		return;
	}
	auto iter = _coreNotify.find(strNotify);
	if (iter != _coreNotify.end())
	{
		std::vector<void*>& vecNotifyObjects = iter->second;
		std::vector<void*>::iterator iterObject = vecNotifyObjects.begin();
		for (; iterObject != vecNotifyObjects.end(); ++iterObject)
		{
			if (*iterObject == pNotifyObject)
			{
				vecNotifyObjects.erase(iterObject);
				break;
			}
		}
	}
}