Re: [Boost-users] AsIO daytime example needs terminate code

Subject: Re: [Boost-users] AsIO daytime example needs terminate code
From: Christopher Yeleighton (giecrilj_at_[hidden])
Date: 2010-04-28 17:47:13

Boris Schaeling <boris <at> highscore.de> writes:

> 
> On Wed, 28 Apr 2010 16:23:43 +0200, Christopher Yeleighton  
> <giecrilj <at> stegny.2a.pl> wrote:
> 
> > [...]Of course this works for the synchronous server where there is an  
> > explicit loop;
> > an asynchronous server needs to call { service->stop(); }  My experiment  
> > shows
> > that it is does not produce any visible failure under SuSE; however, it  
> > is not
> > clear whether io_service::stop can be called from within a signal  
> > handler.
> 
> It's not safe to call io_service::stop in a signal handler (io_service is  
> thread-safe; there are Pthread functions called in io_service::stop which  
> are not safe to call in signal handlers).
> 

So how do I handle signals without breaking something?

I applied this technique to the TCP echo server example [1]; the result is the
active sessions are never destroyed (leaking) because they are destroyed in
response to a network error only.  

Please help.  The assumption that the server runs forever is unacceptable.

Chris