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POHow to launch an "event" when my Boost::asio tcp server just start running ( AKA io_service.run() )?
 

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  1. POHow to launch an "event" when my Boost::asio tcp server just start running ( AKA io_service.run() )?
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    <p>Based on an boost::asio client/server relationship, I have to launch the client program from the server program only when the server thread is in a "<strong>waiting to be connected</strong>" state.<br> <br/> My question is how to have the knowledge of that state ? <br/></p> <p>As a sample use the <a href="http://www.boost.org/doc/libs/1_53_0/doc/html/boost_asio/example/serialization/" rel="nofollow">asio example/serialization</a> <a href="http://www.boost.org/doc/libs/1_53_0/doc/html/boost_asio/example/serialization/" rel="nofollow">link</a>, and replace the main function of server.cpp with that code:</p> <pre><code>#include &lt;conio.h&gt; #include &lt;concrt.h&gt; // wait function #include &lt;future&gt; #include &lt;thread&gt; void server_thread( std::promise&lt;bool&gt;&amp; run ) { boost::asio::io_service io_service; s11n_example::server server(io_service, 123); // too early to run.set_value( true ); io_service.run(); // too late to run.set_value( true ); } int main(int argc, char* argv[]) { std::promise&lt;bool&gt; run; std::thread thrd( server_thread, boost::ref( run ) ); thrd.detach(); bool launched = run.get_future().get(); // server is waiting for connection // launch the client if( launched ) { int rc = system( "start client.exe localhost 123" ); if( rc ) std::cerr &lt;&lt; "system failed returning " &lt;&lt; rc &lt;&lt; std::endl ; } else std::cerr &lt;&lt; "server_thread failure" &lt;&lt; std::endl ; std::cout &lt;&lt; "hit a key to exit" ; while( !_kbhit() ) Concurrency::wait( 100 ); return 0; } </code></pre> <p>Thanks,</p>
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    1. USJean Davy
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      1. POHow to launch an "event" when my Boost::asio tcp server just start running ( AKA io_service.run() )?
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      1. POHow to launch an "event" when my Boost::asio tcp server just start running ( AKA io_service.run() )?
      1. USDavid Baird
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    1. COyour server will accept a connection as a result of the `async_accept` callback, you can set the `future` result inside the callback.
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      1. POHow to launch an "event" when my Boost::asio tcp server just start running ( AKA io_service.run() )?
      1. USSam Miller
    2. CO@SamMiller I would like to synchronize on "ready to connect" state of the talk object. I presume that I have to install a handler in the talk object, and from that handler launch run.set_value( true ) ... But which handler and how ? That is the question ! async_accept is called when a connection is made, I want to synchronize on "able to accept a connection" state.
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      1. POHow to launch an "event" when my Boost::asio tcp server just start running ( AKA io_service.run() )?
      1. USJean Davy
    3. COBoost.Asio's acceptors do not provide reactor based operations for accepting (i.e. connection ready to be accepted).
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      1. POHow to launch an "event" when my Boost::asio tcp server just start running ( AKA io_service.run() )?
      1. USTanner Sansbury
 

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