[Boost-users] Re: status of boost::signal multi-threading support

From: Eric Niebler (eric_at_[hidden])
Date: 2005-01-10 13:10:19

Douglas Gregor wrote:
> 
> On Jan 10, 2005, at 9:04 AM, Stephen torri wrote:
> 
>> On Tue, 2005-01-04 at 21:27 -0500, Douglas Gregor wrote:
>>
>>>>> If you're using a signal from two threads concurrently, you will most
>>>>> likely see random crashes and other bad behavior. Signals keep a lot
>>>>> of
>>>>> state, even when they are being invoked, so just about anything can
>>>>> trip it up.
>>>>
>>>>
>>>> The first thing that came to mind about this was thread specific
>>>> storage
>>>> (TSS). Here is a design pattern that will do what I think we need.
>>>> http://www.cs.wustl.edu/~schmidt/PDF/TSS-pattern.pdf
>>>
>>>
>>> That solves part of the problem, but there's more too it. Eric Niebler
>>> wrote a few posts to the developer's list describing some locking
>>> mechanisms that could be used to make signals work in a multithreaded
>>> environment.
>>>
>>>     Doug
>>
>>
>> Do you know how to get a hold of Eric? I would like to see if he has
>> done any work on the locking mechanisms.
> 

I'm right over here. :)

> 
> Well, he's on the Boost mailing lists (probably all of them). I don't 
> know if he's working on any of this, but you can read his ideas in this 
> thread:
> 
>   http://lists.boost.org/MailArchives/boost/msg63938.php
> 

I haven't looked into this any further, sorry.

-- 
Eric Niebler
Boost Consulting
www.boost-consulting.com