mynet开源库

1.介绍

个人实现的c++开源网络库．

2.软件架构

1.结构图

2.基于event的自动分发机制

3.多优先级分发队列，延迟分发队列

内部event服务于通知机制的优先级为0，外部event优先级为1．

当集中处理分发的event_callback时，若激活了更高优先级的event_callback，可在当前event_callback回调处理结束．进入下次时间循环，以便高优先级event_callback及时得到处理．

4.主动分发event_callback来向工作线程提交回调任务

5.通信对象的高效缓存区管理

5.1.以携带管理信息的可变尺寸块作为基础缓存单位

5.2.以可变尺寸块的链式队列构成的缓存区

5.3.块的可复用

对由于消耗而需释放的块，采用缓存而非释放来管理．

释放块时候，依据块容量，释放到缓存指定容量下块的容器．

需要新块时，依据所需容量，先从缓存取块，取不到时，再动态分配新的块．

5.4.连接对象的连接管理

采用一个互斥锁，实现连接对象上连接建立过程，连接断开过程至多只有一个并发．

a. 连接过程

b.断开过程

c.断开投递快速响应

设置手动分发event_callback的优先级为0，借助event_callback的多优先级分发队列．可使得当前event_callback回调处理结束，即可开始下轮循环，从而快速处理分发的高优先级的event_callback．

5.5.连接对象高效锁管理

a. 通过连接锁实现连接建立，连接断开的串行化．

b. 可读事件处理，收包回调无锁处理．

因为可读事件及收包回调只在单个工作线程引发，且通过连接建立，连接断开的串行化处理．收包过程及其回调可以实现为无锁的．

c. 通过发送锁实现发送缓存区并发管理

用户线程执行发送，工作线程可写事件执行异步发送分别充当了发送缓存的生产者，消费者．我们用发送互斥锁进行并发管理．

5.6.高效的io复用

a. 采用epoll作为io复用器，其比select，poll在管理大规模事件监控时性能更优异．

b. 只在必要时注册连接对象可写event到event_base．

b.1. 连接建立过程，我们将其注册到event_base，以便实现连接结果异步处理．

b.2. 用户线程向发送缓存写入新数据时，我们将其注册到event_base以便实现数据在可写事件中的异步发送．

b.3. 在异步发送里，判断发送缓存为空时，自动移除可写event．以便减少不必要的事件分发．

5.7.简单易用

a. 以c++实现．

b. 以工厂模式管理资源．

c. 接口定义清晰，详见使用说明．

系统要求

1.支持c++11

2.支持cmake

3.linux系统

安装教程

1.在mynet/build下执行：cmake ../

2.在mynet/build下执行：make

3.在mynet/build/demo下执行：./srv_test开启服务端

4.在mynet/build/demo下执行：./cli_test开启客户端

使用说明

1.客户端demo

#include "ifactory.h"
#include "ilog.h"
#include "iclient.h"
#include "define.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <thread>  
#include <chrono>
#include <mutex> 
#include <iostream>  
#include <fstream>
#include <endian.h>

std::mutex mtx;  
std::ofstream logFile("cli_logfile.txt", std::ios_base::out);  
void logcb(mynet::LOGLEVEL nLevel, const char *msg){
    //if(nLevel == mynet::LOGLEVEL::EVENT_LOG_ERR){
        pthread_t thread_id = pthread_self(); 
        std::lock_guard<std::mutex> lock(mtx);  
        logFile << "tid:" << (uint32_t)thread_id << " level: " << (int32_t)nLevel << ": msg: " << msg << std::endl; 
    //}
}

struct Msg1{
    int32_t nLen;
    int32_t nType;
    int32_t nMsg1;
    char strName[100];
    Msg1(){
        nLen = CalculateSize();
        nType = 1;
    }
    static int32_t CalculateSize(){
        return 112;
    }
    void Serialize(char* lpOut){
        int32_t nTmpLen = htobe32(nLen);
        memcpy(lpOut, (char*)&nTmpLen, 4);
        int32_t nTmpType = htobe32(nType);
        memcpy(lpOut+4, (char*)&nTmpType, 4);
        
        int32_t nMsg = htobe32(nMsg1);
        memcpy(lpOut+8, (char*)&nMsg, 4);
        memcpy(lpOut+12, strName, 100);
    }
    Msg1* DeSerialize(char* lpIn){
        Msg1* lpM = new Msg1();
        int32_t nTmpLen = *(int32_t*)lpIn;
        lpM->nLen = be32toh(nTmpLen);
        int32_t nTmpType = *(int32_t*)((char*)lpIn+4);
        lpM->nType = be32toh(nTmpType);

        int32_t nMsg = *(int32_t*)(lpIn+8);
        lpM->nMsg1 = be32toh(nMsg);
        memcpy(lpM->strName, lpIn+12, 100);
        return lpM;
    }
};
struct Msg2{
    int32_t nLen;
    int32_t nType;
    int32_t nMsg2;
    char strName1[100];
    char strName2[100];
    Msg2(){
        nLen = CalculateSize();
        nType = 2;
    }
    static int32_t CalculateSize(){
        return 212;
    }
    void Serialize(char* lpOut){
        int32_t nTmpLen = htobe32(nLen);
        memcpy(lpOut, (char*)&nTmpLen, 4);
        int32_t nTmpType = htobe32(nType);
        memcpy(lpOut+4, (char*)&nTmpType, 4);

        int32_t nMsg = htobe32(nMsg2);
        memcpy(lpOut+8, (char*)&nMsg, 4);
        memcpy(lpOut+12, strName1, 100);
        memcpy(lpOut+112, strName2, 100);
    }
    Msg2* DeSerialize(char* lpIn){
        Msg2* lpM = new Msg2();
        int32_t nTmpLen = *(int32_t*)lpIn;
        lpM->nLen = be32toh(nTmpLen);
        int32_t nTmpType = *(int32_t*)(lpIn+4);
        lpM->nType = be32toh(nTmpType);

        int32_t nMsg = *(int32_t*)(lpIn+8);
        lpM->nMsg2 = be32toh(nMsg);
        memcpy(lpM->strName1, lpIn+12, 100);
        memcpy(lpM->strName2, lpIn+112, 100);
        return lpM;
    }
};
class ClientCallback:public mynet::IClientCallback{
public:
    virtual ~ClientCallback(){
        printf("~ClientCallback\n");
    }
    virtual void OnEvent(short events){
        printf("recv event %d\n", events);
    }
    virtual void OnMessage(char* lpMsg, int32_t nLen){
        printf("msg len:%d\n", nLen);
    }
};
int main(){
    mynet::SetLogCb(logcb);
    mynet::FactoryConfig stConfig;
    stConfig.nWorkThreadNum = 1;
    mynet::IFactory* lpFac = mynet::CreateFactory(stConfig);
    lpFac->Start();
    mynet::ClientConfig stCliConfig;
    stCliConfig.nConnTimeout = 4;
    stCliConfig.nPort = 13142;
    strcpy(stCliConfig.strIp, "127.0.0.1");
    stCliConfig.nThreadIndex = 0;

    ClientCallback stCall;
    mynet::IClient* lpCli = lpFac->CreateClient(stCliConfig, &stCall);
    int32_t nRet = lpCli->DoConnect(13142, stCliConfig.strIp, 4, true, true);
    printf("conn ret %d\n", nRet);
    if(nRet != RET_CODE_CONN_SUCC){
        return 0;
    }

    char* lpBuf = (char*)malloc(Msg1::CalculateSize());
    for(int32_t i = 0; i < 10; i++){
        Msg1 stM1;
        stM1.nMsg1 = 11;
        strcpy(stM1.strName, "StrName1"); 
        stM1.Serialize(lpBuf);
        int32_t nSend = lpCli->SendData(lpBuf, Msg1::CalculateSize());
        printf("%d send ret %d\n", i, nSend);
    }

    std::this_thread::sleep_for(std::chrono::seconds(6)); 
    lpCli->DoDisconnect(true, true);
    lpFac->Stop();
    mynet::DestroyFactory(lpFac);
    return 0;
}

2.服务端demo

#include "ifactory.h"
#include "ilog.h"
#include "iserver.h"
#include "define.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <thread>  
#include <chrono>
#include <mutex> 
#include <iostream>  
#include <fstream>
std::mutex mtx;  
std::ofstream logFile("svr_logfile.txt", std::ios_base::out);  
void logcb(mynet::LOGLEVEL nLevel, const char *msg){
    //if(nLevel == mynet::LOGLEVEL::EVENT_LOG_ERR){
    	pthread_t thread_id = pthread_self(); 
        std::lock_guard<std::mutex> lock(mtx);  
        logFile << "tid:" << (uint32_t)thread_id << " level: " << (int32_t)nLevel << ": msg: " << msg << std::endl; 
    //}
}

struct Msg1{
    int32_t nLen;
    int32_t nType;
    int32_t nMsg1;
    char strName[100];
    Msg1(){
        nLen = CalculateSize();
        nType = 1;
    }
    static int32_t CalculateSize(){
        return 112;
    }
    void Serialize(char* lpOut){
        int32_t nTmpLen = htobe32(nLen);
        memcpy(lpOut, (char*)&nTmpLen, 4);
        int32_t nTmpType = htobe32(nType);
        memcpy(lpOut+4, (char*)&nTmpType, 4);
        
        int32_t nMsg = htobe32(nMsg1);
        memcpy(lpOut+8, (char*)&nMsg, 4);
        memcpy(lpOut+12, strName, 100);
    }
    Msg1* DeSerialize(char* lpIn){
        Msg1* lpM = new Msg1();
        int32_t nTmpLen = *(int32_t*)lpIn;
        lpM->nLen = be32toh(nTmpLen);
        int32_t nTmpType = *(int32_t*)((char*)lpIn+4);
        lpM->nType = be32toh(nTmpType);

        int32_t nMsg = *(int32_t*)(lpIn+8);
        lpM->nMsg1 = be32toh(nMsg);
        memcpy(lpM->strName, lpIn+12, 100);
        return lpM;
    }
};
struct Msg2{
    int32_t nLen;
    int32_t nType;
    int32_t nMsg2;
    char strName1[100];
    char strName2[100];
    static int32_t CalculateSize(){
        return 212;
    }
    void Serialize(char* lpOut){
        int32_t nTmpLen = htobe32(nLen);
        memcpy(lpOut, (char*)&nTmpLen, 4);
        int32_t nTmpType = htobe32(nType);
        memcpy(lpOut+4, (char*)&nTmpType, 4);

        int32_t nMsg = htobe32(nMsg2);
        memcpy(lpOut+8, (char*)&nMsg, 4);
        memcpy(lpOut+12, strName1, 100);
        memcpy(lpOut+112, strName2, 100);
    }
    Msg2* DeSerialize(char* lpIn){
        Msg2* lpM = new Msg2();
        int32_t nTmpLen = *(int32_t*)lpIn;
        lpM->nLen = be32toh(nTmpLen);
        int32_t nTmpType = *(int32_t*)(lpIn+4);
        lpM->nType = be32toh(nTmpType);

        int32_t nMsg = *(int32_t*)(lpIn+8);
        lpM->nMsg2 = be32toh(nMsg);
        memcpy(lpM->strName1, lpIn+12, 100);
        memcpy(lpM->strName2, lpIn+112, 100);
        return lpM;
    }
};

class ServerCallback:public mynet::IServerCallback{
public:
    ServerCallback(){
    }
    virtual ~ServerCallback(){
        printf("~ServerCallback\n");
    }
    virtual void OnEvent(int32_t nIndex, short events){
        printf("index_%d,events_%d\n", nIndex, events);
    }
    virtual void OnMessage(int32_t nIndex, char* lpMsg, int32_t nLen){
        printf("index_%d,len_%d\n", nIndex, nLen);
        m_lpSvr->SendData(nIndex, lpMsg, nLen);
    }
public:
    mynet::IServer* m_lpSvr = nullptr;
};

int main(){
    mynet::SetLogCb(logcb);
    mynet::FactoryConfig stConfig;
    stConfig.nWorkThreadNum = 1;
    mynet::IFactory* lpFac = mynet::CreateFactory(stConfig);
    lpFac->Start();
   
    mynet::ServerConfig stSvrConfig;
    stSvrConfig.nPort = 13142;
    stSvrConfig.nListenThreadIndex = 0;
    
    ServerCallback stSvrCallback;
    mynet::IServer* lpSvr = lpFac->CreateServer(stSvrConfig, &stSvrCallback);
    stSvrCallback.m_lpSvr = lpSvr;
    lpSvr->Start();
    
    while(true){
        std::this_thread::sleep_for(std::chrono::seconds(6)); 
    }
    lpSvr->Stop();
    lpFac->Stop();
    mynet::DestroyFactory(lpFac);
    return 0;
}

后续待处理事项

1.完善各类场景单元测试

2.支持epoll的et模式事件分发

3.制作规范清晰的使用文档

开源地址

1.https://github.com/xubenhao/mynet

2. https://gitee.com/xubenhao2/mynet