ned模块
simple Txc1 { gates: input in; output out; } network Tictoc1 { submodules: tic: Txc1; toc: Txc1; connections: tic.out --> { delay = 100ms; } --> toc.in; tic.in <-- { delay = 100ms; } <-- toc.out; }cc模块
#include <string.h> #include <omnetpp.h> using namespace omnetpp; class Txc1 : public cSimpleModule { protected: // The following redefined virtual function holds the algorithm. //重写函数 所有继承自simple的类都要重写这两个函数 //重写虚函数，注册后程序运行时自动调用，initialize调用一次，handleMessage接收到消息后运行 virtual void initialize() override;//初始化 virtual void handleMessage(cMessage *msg) override;//接收消息 }; // The module class needs to be registered with OMNeT++ //所有模块实现时，必须添加下面这个定义 Define_Module(Txc1); void Txc1::initialize() { // Initialize is called at the beginning of the simulation. // To bootstrap the tic-toc-tic-toc process, one of the modules needs // to send the first message. Let this be `tic'. // Am I Tic or Toc? //getName获取当前实例的名称，也就是NED模块中实例的名称 //strcmp函数是string compare(字符串比较)的缩写，用于比较两个字符串并根据比较结果返回整数。 if (strcmp("tic", getName()) == 0) { // create and send first message on gate "out". "tictocMsg" is an // arbitrary string which will be the name of the message object. //定义消息 消息中传入字符串 字符串中就是消息的名称 cMessage *msg = new cMessage("tictocMsg"); //进行消息发送 通过out输出门 send(msg, "out"); //当send通过Out输出门发送出去后，OMnet++默认加入一个消息事件，toc默认通过内部的消息接受到这个事件 } } //再通过handleMessage回调处理这个事件,回调接收到之后toc将这个消息通过send函数再发送出去，也就是通过toc的out void Txc1::handleMessage(cMessage *msg) { // The handleMessage() method is called whenever a message arrives // at the module. Here, we just send it to the other module, through // gate `out'. Because both `tic' and `toc' does the same, the message // will bounce between the two. send(msg, "out"); // send out the message }运行
