Re: [Boost-users] Re: Re: Re: Q: Stopping threads (Win32)or...themysterious case of the thread with split personality

From: Ben Hutchings (ben.hutchings_at_[hidden])
Date: 2004-12-06 10:27:52

Dan Dimerman wrote:
> "Ben Hutchings" <ben.hutchings_at_[hidden]> wrote in message 
> news:41B47000.1030500_at_businesswebsoftware.com...
> 
>>That still won't solve your problem, in general.  Multithreading is an / 
>>... /
>>You should protect all access to the controlling flag with a mutex.  In 
>>this case it would probably be sufficient to use the "volatile" qualifier 
>>on the controlling member, but this is not generally a good solution.
>>Ben.
> 
> 
> In this case, I think the problem was that by {mis,ab,}using the boost 
> thread lib, I passed a copy of
> the functor that would be the worker thread instead of just a reference to 
> it, hence the duplicity.
> Protecting that variable with a mutex wouldn't have had any effect, since 
> there would have been two copies still.

I realise that, but I think eliminating the copy only solves half the 
problem.

Ben.