Re: [Boost-users] [Asio] [Solved] Dispatch question

Subject: Re: [Boost-users] [Asio] [Solved] Dispatch question
From: Malinka Rellikwodahs (aelmalinka_at_[hidden])
Date: 2010-07-30 22:40:43

On Fri, Jul 30, 2010 at 04:14, Malinka Rellikwodahs
<aelmalinka_at_[hidden]> wrote:
> On Fri, Jul 30, 2010 at 02:50, Igor R <boost.lists_at_[hidden]> wrote:
>>> Attached is a piece of sample code in which I'm trying to use
>>> Boost.Asio to dispatch a call that will cause the program to shutdown,
>>> however for some reason the io_service is not ever calling the
>>> handle_stop method, so the program does not shutdown.
>>
>>
>>> Â bool run = m_io.poll_one() >= 0;
>>
>> the return value of poll_one() is always >=0 (it's size_t), so run is
>> always true and the condition if(!run && m_stop) is always false.
>
> sorry that's a typo but actually irrelevant as the handle_stop is
> still never called.
>
> here is a simpler version with output that shows the same behavior
> http://ix.io/16b
>
> and here is a fixed version of what was previously attached with
> output http://ix.io/16c
>

After some help in the irc channel I've found the problem to be
related to the calls to poll_one having no work to do, so subsequent
calls to poll_one are invalid, as per
http://www.boost.org/doc/libs/1_43_0/doc/html/boost_asio/reference/io_service/reset.html
thank you for your help.

As an interesting side note windows has the unfortunately incorrect
behavior of working, which ends up making it look like a bug >.<;;;