[asio-users] basic_stream_socket::async_connect -- non-blockingconnect vs async connect

[Chauhan, V. <Vik...@an...>]

Hello all,

I think I have found the reason for this.

Actually, I had the following sequence of calls earlier :
1. tcp::socket::async_connect(peer_endpoint,connect_handler ).
2. io_service::run()=20

Logically, step 2 should precede step 1, but I could not do that as
io_service::run() was failing as there was nothing registered to it.=20

Now, I have created an instance of  "boost::asio::io_service::work " in
the beginning of program. It helps the io_service to queue any aync
calls.
Hence now the sequence of calls is :
1. boost::asio::io_service::work(ioservice)=20
2. io_service::run()=20
3. tcp::socket::async_connect(peer_endpoint,connect_handler ).

Thanks to those who may have tried to find out reasons for the problem.

Regards,
Vikas

> -----Original Message-----
> From: Chauhan, Vikas=20
> Sent: 12 September 2007 20:58
> To: asi...@li...
> Cc: Sykes, Rob
> Subject: [asio-users] basic_stream_socket::async_connect --=20
> non-blockingconnect vs async connect
>=20
> Hello Chris et al,
>=20
> I am trying to use "basic_stream_socket::async_connect" for=20
> non-blocking socket connect operation on Windows XP.
> In case of connect failures, I have observed that this=20
> function is async but the connect functionality is still=20
> blocking. That is when connect operation fails, the=20
> "connect_handler" is getting called after the same duration=20
> as the time taken by "basic_stream_socket::connect" function=20
> to return.
>=20
> Any comments?
>=20
> I have implemented a similar functionality in my code (not=20
> using asio at the moment) using "select" API. Where I can=20
> retry non-blocking connect operation in less than 5 seconds.
> However it is not possible using=20
> "basic_stream_socket::async_connect".=20
>=20
> It is very likely that this behaviour is due to lack of my=20
> knowledge of asio. Please advise me of possible way to=20
> achieve the desired functionality.=20
>=20
> Thanks in advance.
>=20
> Regards,
> Vikas
>=20
>=20
>=20