Re: [Boost-users] [ASIO] async_accept : Error m_val 1.

Subject: Re: [Boost-users] [ASIO] async_accept : Error m_val 1.
From: Viatcheslav.Sysoltsev_at_[hidden]
Date: 2011-03-10 09:42:30

On Thu, 10 Mar 2011 13:47:46 +0100, Cyprien DIOT <cyprien.diot_at_[hidden]>  
wrote:

>
> I've made unit test for this problem.
>
> Server.h:
>
> #pragma once
>
>
> #include <boost/thread/thread.hpp>
> #include <boost/asio.hpp>
> #include <boost/array.hpp>
> #include <iostream>
>
> class Server
> {
> public:
> 	AssistGui(boost::asio::io_service &);
> 	~AssistGui(void);
>
> 	void	accept(const boost::system::error_code& e);
> 	void	sendMsg(const char *msg, unsigned int size);
>
> private:
> 	boost::asio::io_service &io;
> 	boost::asio::ip::tcp::socket	_client;
> 	boost::asio::ip::tcp::acceptor	_acceptor;
>
> };
>
> Server.cpp:
>
> #include "Server.h"
>
> using boost::asio::ip::tcp;
>
> Server::Server(boost::asio::io_service &ios) : io(ios), _client(ios),  
> _acceptor(ios, tcp::endpoint(tcp::v4(), 14242))
> {
> 	_acceptor.async_accept(_client, boost::bind(&Server::accept, this,  
> boost::asio::placeholders::error));
> }
>
> void	Server::sendMsg(const char *msg, unsigned int size)
> {
>
> }
> Server::~Server(void)
> {
> }
>
> void		Server::accept(const boost::system::error_code& e)
> {
>   // same error :-( : "Already open"
> }
>
> int		main()
> {
> 	boost::asio::io_service ios;
>
> 	Server	s(ios);
> 	ios.run();
> }
>
>
> The error is still the same "Already open".
> _WIN32_WINNT=0x0501 is defined.
> I tried to change port.
> No warnings at program compilation.
> Can you help me?
>
> Thank you
>
> Cyprien DIOT
>

Hi Cyprien,

as far as I remember from socket programming, if you open a socket without  
REUSE option, it is marked busy even after releasing for a some time  
afterwards depending on your kernel implementation. Probably if you reboot  
or wait some time, your testcase will work but again only once. Try  
setting REUSE flag for your socket to check if it helps.

-- Slava