boost::asio::tcp 异步

/*---------------------------------------------------------------------------
文件    : SockServer.h
版本    : V1.0
描述    : asio socket server
---------------------------------------------------------------------------*/
#pragma once
#include <list>
#include <thread>
#include <boost/asio.hpp>
#include <boost/serialization/singleton.hpp>
using namespace std;
using boost::asio::ip::tcp;


#define tcpServer CSockServer::get_mutable_instance()
class CSockServer : public boost::serialization::singleton<CSockServer>
{
public:
    CSockServer();
    ~CSockServer();

    bool Init();
    bool Start();
    void Stop();
protected:
    void Run();

    //Accept 模板
    template <class S>
    void Accept(std::shared_ptr<tcp::acceptor> accept)
    {
        //异步等待一个客户端来连接
        accept->async_accept(
            [this, accept](const boost::system::error_code& ec, tcp::socket socket)
        {
            printf("%s %d 
", __FUNCTION__, __LINE__);
            if (!ec) {

                //实例化连接对象（自定义一个类，实现业务操作 StartWork） 
                std::make_shared<S>(std::move(socket))->StartWork();
            }
            else {
                std::string xx = ec.message();
                printf("Accept fsu session error:%s
", ec.message().c_str());
                exit(-1);    
            }
            //创建完一个新的连接后， 需要再次异步等待下一个连接。不然Accept函数会退出。
            Accept<S>(accept);
        });
    }
protected:
    //asio程序必须的io_service对象,使用io_service与系统的输入输出进行交互
    boost::asio::io_service m_ios;
    //守护io_service
    boost::asio::io_service::work m_work;
    //保存线程句柄
    std::vector<std::shared_ptr<std::thread>> m_vtxThreads;
};

/*---------------------------------------------------------------------------
文件    : SockServer.cpp
版本    : V1.0
描述    : asio socket server,终端数据接收tcp端口，创建连接session
---------------------------------------------------------------------------*/
#include <algorithm>
#include <string>
#include <thread>
#include "com_def.h"
#include "ClientSession.h"
#include "SockServer.h"
using namespace std;

CSockServer::CSockServer()
    : m_work(m_ios)
{
}


CSockServer::~CSockServer()
{
}

//------------------------------------------------------------------------
// 函数名称: Init
// 返 回 值: bool    -- true 成功，false失败，一般是端口被占用
// 说    明: 初始化，监听端口并开始异步accept
//------------------------------------------------------------------------
bool CSockServer::Init()
{
    boost::system::error_code ec;
    try
    {
        std::shared_ptr<tcp::acceptor> accept1(new tcp::acceptor(m_ios, tcp::endpoint(tcp::v4(), 7200), false));
        Accept<ClientSession>(accept1);
    }
    catch (boost::system::system_error& e)
    {
        printf("Construct tcp::acceptor error:%s
", e.what());
        throw std::string("Construct tcp::acceptor error");
    }
    printf("CSockServer::Init() success! 
");
    return true;
}

//------------------------------------------------------------------------
// 函数名称: Start
// 返 回 值: bool    -- true成功， false 失败
// 说    明: 多线程异步调用socket事件
//------------------------------------------------------------------------
bool CSockServer::Start()
{
    if (!m_vtxThreads.empty())
    {
        printf("Attempt to start socket server while it's running!!
");
        return false;
    }

    unsigned int uCount = MAX_T((unsigned int)4, std::thread::hardware_concurrency());
    try
    {
        for (unsigned int i = 0; i < uCount; ++i)
        {
            //多线程异步调用socket事件
            std::shared_ptr<std::thread> t(new std::thread(&CSockServer::Run, this));
            m_vtxThreads.emplace_back(t);
        }
    }
    catch (const std::string&)
    {
        throw ("CSockServer::Start() error");
    }

    printf("CSockServer::Start() success! 
");
    return true;
}

//------------------------------------------------------------------------
// 函数名称: Run
// 返 回 值: void
// 说    明: socket 事件循环
//------------------------------------------------------------------------
void CSockServer::Run()
{
    boost::system::error_code ec;
    m_ios.run(ec);
    if (ec)
    {
        printf("Exit one socket server running thread with error msg:%s!", ec.message().c_str());
    }
    else
    {
        printf("Exit one socket server running thread with normal code!
");
    }
}


//------------------------------------------------------------------------
// 函数名称: Stop
// 返 回 值: void
// 说    明: 服务停止
//------------------------------------------------------------------------
void CSockServer::Stop()
{
    m_ios.stop();
}