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

From: Douglas Gregor (dgregor_at_[hidden])
Date: 2005-01-10 09:30:08

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.

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

        Doug