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这个问题有点烦人,我无法编译下面的代码。您必须编译下面的代码。

我在使用 boost asio 时遇到了一些问题,我试图将接受连接的逻辑抽象为一个统一的抽象,以便我可以使用常规 TCP/IP 统一启动 Windows 命名管道和 Unix 域套接字的连接。

下面的代码中显示了 3 个类,前 2 个是接受 TCP 连接的实现,下面的第三个类是根据前 2 个实现的泛型类。我在boost::bind调用时遇到问题。问题可能在于我对语义的理解。

如果我创建TcpDestinationAcceptor::handle_accept一个常规成员函数(即,不是模板成员函数),导致我没有传递AcceptHandler参数。代码编译得很好。注意:我不会从TcpDestinationAcceptor::StartAccepting.

注意:我已经开始了不同的设计,如果可能的话,我仍然想继续这个设计。

自包含代码:

#include <boost/asio/ip/tcp.hpp>
#include <boost/asio/io_service.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/bind.hpp>
#include <boost/asio/placeholders.hpp>

class TcpDestinationConnection
{
public:
  typedef boost::asio::ip::tcp::socket t_io_object;
  TcpDestinationConnection(boost::asio::io_service & io_s)
    : m_io_object(io_s) {} ;
  t_io_object & io_object() { return m_io_object; }
private:
  t_io_object m_io_object;
};

class TcpDestinationAcceptor
{
public:
  typedef boost::asio::ip::tcp::acceptor t_acceptor;
  typedef boost::shared_ptr<TcpDestinationConnection> t_connection_ptr;


  TcpDestinationAcceptor( boost::asio::io_service & io_s)
    : m_io_service(io_s),
      m_acceptor(io_s) 
  {
    m_acceptor.open(boost::asio::ip::tcp::v4());
  }

  TcpDestinationAcceptor( boost::asio::io_service & io_s , 
                          const boost::asio::ip::tcp::endpoint & endpoint)
    : m_io_service(io_s),
      m_acceptor(io_s, endpoint) 
    {
      m_acceptor.open(boost::asio::ip::tcp::v4());
    }

  t_acceptor & acceptor() { return m_acceptor; } 

  template<typename AcceptHandler>
  void StartAccepting(AcceptHandler h)
  {   
    t_connection_ptr new_session(new TcpDestinationConnection(m_io_service));

    m_acceptor.async_accept(  new_session->io_object(),
                              boost::bind(  &TcpDestinationAcceptor::handle_accept<AcceptHandler>, this,
                                              boost::asio::placeholders::error, new_session, h));
  }

  template<typename AcceptHandler>
  void handle_accept(const boost::system::error_code & err, t_connection_ptr cur, AcceptHandler h)  {
  }
private:
  boost::asio::io_service & m_io_service;
  boost::asio::ip::tcp::acceptor m_acceptor;
};

template<typename t_acceptor>
class ConnectionOracle
{
public:
  ConnectionOracle()
    : m_io_service(),
      m_acceptor(m_io_service) {}

  typename t_acceptor::t_acceptor & native_acceptor() { return m_acceptor.acceptor(); }
  boost::asio::io_service & io_service() { return m_io_service; }

  void StartConnection( typename t_acceptor::t_connection_ptr connection,
                        boost::system::error_code & error)
  {

  }
  void Begin()
  {
    m_acceptor.StartAccepting(  boost::bind(  &ConnectionOracle::StartConnection,this,
                                              _1,
                                              boost::asio::placeholders::error));
    m_io_service.run();
  } 
private:
  boost::asio::io_service m_io_service;
  t_acceptor m_acceptor;
};

int main()
{
  ConnectionOracle<TcpDestinationAcceptor> ConOracle;
  ConOracle.native_acceptor().
    bind(boost::asio::ip::tcp::endpoint(boost::asio::ip::tcp::v4(),50000));
  ConOracle.Begin();

  return 0;
}
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