在指定端口监听

下面的程序会在7905端口持续监听，其他的什么也不做

#include <iostream>
using namespace std;
#include "ace/INET_Addr.h"
#include "ace/Svc_Handler.h"
#include "ace/SOCK_Stream.h"
#include "ace/SOCK_Acceptor.h"
#include "ace/Acceptor.h"
class ClientService : public ACE_Svc_Handler<ACE_SOCK_STREAM,ACE_NULL_SYNCH> 
{
};

int main(int, char *[])
{
    ACE_INET_Addr addr("7905");
    typedef ACE_Acceptor<ClientService,ACE_SOCK_ACCEPTOR> ClientAcceptor;
    ClientAcceptor acceptor;
    if (acceptor.open(addr)== -1)
    {
        cout<<"acceptor open failed !"<<endl;
        return -1;
    }
    ACE_Reactor::instance()->run_reactor_event_loop();

    return 0;

};