提升async_read

时间:2011-12-13 05:35:06

标签: c++ boost boost-asio

我正在尝试创建一个TCP服务器,其中Start()方法阻塞,直到接受连接,然后开始一系列异步读取。我有以下代码,当我使用telnet连接时,我得到了这个输出:

  

等待新连接

     

接受连接

     

终止调用抛出异常陷阱陷阱:6

以下是代码:

void SocketReadThread::Start()
{
    bzero(m_headerBuffer, HEADER_LEN);
    m_running = true;

    asio::io_service ios;
    asio::ip::tcp::acceptor acp (ios,
        boost::asio::ip::tcp::endpoint(boost::asio::ip::tcp::v4(), GUI_PORT));

    asio::ip::tcp::socket sock(ios);
    std::cout << "Waiting for a new connection" << std::endl;

    acp.accept(sock); 
    std::cout << "Connection accepted" << std::endl;

    asio::async_read(sock, asio::buffer(m_headerBuffer, HEADER_LEN),
        boost::bind(&SocketReadThread::handleReadHeader, shared_from_this(),
        asio::placeholders::error));

    ios.run();
}

void SocketReadThread::handleReadHeader(const system::error_code& error)
{
    std::cout << "Read two bytes!" << std::endl;
}

2 个答案:

答案 0 :(得分:2)

您应该将main()功能包装在try {...} catch (std::exception& e) { cout << e.what(); }区块中。

答案 1 :(得分:1)

你可能通过错误地声明你的ReadHandler而对堆栈做了一些可怕的(并且很棒)。即使您忽略某些参数,签名也必须是:

void handler (
  const boost::system::error_code& error, // Result of operation.

  std::size_t bytes_transferred           // Number of bytes copied into the
                                          // buffers. If an error occurred,
                                          // this will be the  number of
                                          // bytes successfully transferred
                                          // prior to the error.
);