class ClientsTread
{
public:
    ClientsTread(){ _clients.clear(); }
    ~ClientsTread()
    {
        for(std::set<ClientSocket*>::iterator it = _clients.begin(); it != _clients.end(); it++)
        {
            if ((*it)->_socket)
            {
                shutdown((*it)->_socket, 2);
                close((*it)->_socket);
            }
        }
    }
    void add(ClientSocket *cs)
    {
        _clients.insert(cs);
        if (DEBUG)
            std::cout << "ClientsTread add:" << cs->_socket << std::endl;
    }
private:
    std::set<ClientSocket*> _clients;
} *_clientsthread;