文件描述符的分析（35-2）

代码

#include <muduo/net/TcpServer.h>
#include <muduo/net/EventLoop.h>
#include <muduo/net/InetAddress.h>

#include <boost/bind.hpp>

#include <stdio.h>

using namespace muduo;
using namespace muduo::net;

class TestServer
{
 public:
  TestServer(EventLoop* loop,
             const InetAddress& listenAddr)
    : loop_(loop),
      server_(loop, listenAddr, "TestServer")
  {
    server_.setConnectionCallback(
        boost::bind(&TestServer::onConnection, this, _1));
    server_.setMessageCallback(
        boost::bind(&TestServer::onMessage, this, _1, _2, _3));
  }

  void start()
  {
      server_.start();
  }

 private:
  void onConnection(const TcpConnectionPtr& conn)
  {
    if (conn->connected())
    {
      printf("onConnection(): new connection [%s] from %s\n",
             conn->name().c_str(),
             conn->peerAddress().toIpPort().c_str());
    }
    else
    {
      printf("onConnection(): connection [%s] is down\n",
             conn->name().c_str());
    }
  }

  void onMessage(const TcpConnectionPtr& conn,
                   const char* data,
                   ssize_t len)
  {
    printf("onMessage(): received %zd bytes from connection [%s]\n",
           len, conn->name().c_str());
  }

  EventLoop* loop_;
  TcpServer server_;
};


int main()
{
  printf("main(): pid = %d\n", getpid());

  InetAddress listenAddr(8888);
  EventLoop loop;

  TestServer server(&loop, listenAddr);
  server.start();

  loop.loop();
}

---

分析结果

0 ， 1  ，2 进程默认打开
3 EpollerFd
4 timerFd
5 wakeupFd
6 listenFd
7 idleFd

ubuntu@ubuntu-virtual-machine:~/pro/35$ ./build/debug/bin/reactor_test09
main(): pid = 10797
20131023 08:05:04.423104Z 10797 TRACE updateChannel fd = 4 events = 3 - EPollPoller.cc:104
20131023 08:05:04.423413Z 10797 TRACE EventLoop EventLoop created 0xBF97AAB4 in thread 10797 - EventLoop.cc:62
20131023 08:05:04.423489Z 10797 TRACE updateChannel fd = 5 events = 3 - EPollPoller.cc:104
20131023 08:05:04.423883Z 10797 TRACE updateChannel fd = 6 events = 3 - EPollPoller.cc:104
20131023 08:05:04.423968Z 10797 TRACE loop EventLoop 0xBF97AAB4 start looping - EventLoop.cc:94
20131023 08:05:13.376959Z 10797 TRACE poll 1 events happended - EPollPoller.cc:65
20131023 08:05:13.377558Z 10797 TRACE printActiveChannels {6: IN }  - EventLoop.cc:257-----》》有连接到来
20131023 08:05:13.377681Z 10797 INFO  TcpServer::newConnection [TestServer] - new connection [TestServer:0.0.0.0:8888#1] from 127.0.0.1:57756 - TcpServer.cc:93
20131023 08:05:13.377719Z 10797 DEBUG TcpConnection TcpConnection::ctor[TestServer:0.0.0.0:8888#1] at 0x8BB3490 fd=8 - TcpConnection.cc:62-------》》已连接的套接字
20131023 08:05:13.377746Z 10797 TRACE newConnection [1] usecount=1 - TcpServer.cc:111
20131023 08:05:13.377772Z 10797 TRACE newConnection [2] usecount=2 - TcpServer.cc:113
20131023 08:05:13.377819Z 10797 TRACE connectEstablished [3] usecount=6 - TcpConnection.cc:78
20131023 08:05:13.377846Z 10797 TRACE updateChannel fd = 8 events = 3 - EPollPoller.cc:104
onConnection(): new connection [TestServer:0.0.0.0:8888#1] from 127.0.0.1:57756
20131023 08:05:13.377902Z 10797 TRACE connectEstablished [4] usecount=6 - TcpConnection.cc:83
20131023 08:05:13.377915Z 10797 TRACE newConnection [5] usecount=2 - TcpServer.cc:122
20131023 08:05:23.388224Z 10797 TRACE poll  nothing happended - EPollPoller.cc:74
20131023 08:05:32.910851Z 10797 TRACE poll 1 events happended - EPollPoller.cc:65
20131023 08:05:32.910969Z 10797 TRACE printActiveChannels {8: IN }  - EventLoop.cc:257----->>已连接的套接字有可读事件
20131023 08:05:32.910990Z 10797 TRACE handleEvent [6] usecount=2 - Channel.cc:67
onMessage(): received 5 bytes from connection [TestServer:0.0.0.0:8888#1]
20131023 08:05:32.911066Z 10797 TRACE handleEvent [12] usecount=2 - Channel.cc:69