调用函数函数从功能指针向量向量的函数指针

calling function pointer of a member function from a function pointer vector

本文关键字：函数 指针 向量 功能 调用      更新时间：2023-10-16

我认为这主要是语法错误（尽管在汇编过程中未捕获，但仅在运行时发生错误）

我正在尝试开发一个事件驱动的体系结构，在该体系结构中我保留了EventReceiver的向量，并尝试从向量拨打它们。

commonio.h 

    class CommonIO {
    public:
        typedef void (*incomingMsgReceiver)(char*);
            void registerForIncomingMsg(incomingMsgReceiver);
            void incomingMsgReceived(char*);
    }

commonio.cpp 

    std::vector<void (*)(char*)> listeners;
    void CommonIO::registerForIncomingMsg(incomingMsgReceiver receiverFunction) {
        listeners.push_back(receiverFunction);
    }
    void CommonIO::incomingMsgReceived(char* buf) {
        for (unsigned int j = 0; j < listeners.size(); j++) {
                listeners[i](buf);  //error, segmentation fault..how do i call it?
            }
    }

main.h 

class Main {
public:
     static void msgReceived(char*);
     void mainLoop();
}

main.cpp 

void Main::msgReceived(char* msg)
{
    printf("nn --------->>>>> %s nn" , msg);
}
void Main::mainLoop()
{
     CommonIO::incomingMsgReceiver receiver = &Main::msgReceived;
     CommonIO::getInstance()->registerForIncomingMsg( receiver );
}

IncomingMsgreceived函数通过异步过程调用

该程序编译了罚款。。。。。。。。。。。。。。。。。。。线。适当的语法是什么？

为什么不使用继承和公共基类？制作更简单的代码，并且您正在使用对象进行详细信息，以便您拥有数据，其他方法等。

即。像这样的东西

class incomingMsgReceiver {
   public:
      virtual void msgReceived(char *msg) = 0;
};
class MyMessage : public incomingMsgReceiver {
   public virual void msgReceieved(char *msg);
}
class OtherMyMessage : public incomingMsgReceiver {
   public virual void msgReceieved(char *msg);
}
void MyMessage::msgReceived(char *msg)
{
   /// Do stuff here
}
void msgReceived::OtherMyMessage(char *msg)
{
   /// Do stuff here
}

然后为您的common.h：

class CommonIO
{
   private:
      std::vector<incomingMsgReceiver *> listeners;
   public:
      void addListner(incomingMsgReceiver *reveiver) { listners.push_back(reveiver); }
      void incomingMsgReceived(char*msg)
      {
         for (unsigned int j = 0; j < listeners.size(); j++)
         {
            listeners[j]->msgReceived((msg);
         }
      }
};
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