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POboost::asio::io_service to retrieve data in main
 

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  1. POboost::asio::io_service to retrieve data in main
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    <p>Come across the following codes (from user368831) which is what I am looking for. I have modified a little to make it a threaded TCP session that listen and read for connection and data while the main loop can do other tasks.</p> <pre><code>class CSession { public: CSession(boost::asio::io_service&amp; io_service) : m_Socket(io_service) {} tcp::socket&amp; socket() return m_Socket; void start() { boost::asio::async_read_until(m_Socket, m_Buffer, " ", boost::bind(&amp;CSession::handle_read, this, boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred)); } void handle_read(const boost::system::error_code&amp; error, size_t bytes_transferred) { if (!error) { ostringstream ss; ss &lt;&lt; &amp;m_Buffer; m_RecvMsg = ss.str(); std::cout &lt;&lt; "handle_read():" &lt;&lt; m_RecvMsg &lt;&lt; std::endl; } else delete this; } private: boost::asio::streambuf m_Buffer; tcp::socket m_Socket; string m_RecvMsg; }; class CTcpServer { public: CTcpServer(short port) : m_Acceptor(m_IOService, tcp::endpoint(tcp::v4(), port)), m_Thread(boost::bind(&amp;boost::asio::io_service::run, &amp;m_IOService)) { CSession* new_session = new CSession(m_IOService); m_Acceptor.async_accept(new_session-&gt;socket(), boost::bind(&amp;CTcpServer::handle_accept, this, new_session, boost::asio::placeholders::error)); }; void handle_accept(CSession* new_session, const boost::system::error_code&amp; error) { if (!error) { new_session-&gt;start(); new_session = new CSession(m_IOService); m_Acceptor.async_accept(new_session-&gt;socket(), boost::bind(&amp;CTcpServer::handle_accept, this, new_session, boost::asio::placeholders::error)); } else delete new_session; } private: boost::asio::io_service m_IOService; tcp::acceptor m_Acceptor; boost::thread m_Thread; }; void main() { : CTcpServer *server = new CTcpServer(6002); // tcp port 6002 /* How to get the incoming data sent from the client here?? */ // string message; // while(1) // { // if ( server-&gt;incomingData(message) ) // { // std::cout &lt;&lt; "Data recv: " &lt;&lt; message.data() &lt;&lt; std::endl; // } // : // : // other tasks // : // } } </code></pre> <p>However, how do I code incomingData() in the main loop such that it will monitor the data from the client and return true whenever handle_read() is called?</p> <p>Can use Boost::signals library in this case? </p>
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    1. COCheck if post function of asio is of any use to you
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    2. COIs placing the server into an own thread an option?
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      1. USTobias Schlegel
 

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