Re: [Boost-users] Problem with signals2 and shared_ptr

Subject: Re: [Boost-users] Problem with signals2 and shared_ptr
From: Nat Goodspeed (nat_at_[hidden])
Date: 2010-05-26 11:52:23

Glenn Macgregor wrote:

> I am using boost 1.41.0 on Windows with Visual Studio 2008 and am seeing 
> what seems to be an issue with signals2 and shared_ptr.  The problem is 
> that the shared_ptr does not decrement is reference count after I 
> disconnect the signals2::connection.

<snip>

> The 
> strange thing is the use_count does not decrement after the disconnect 
> or exiting the caller.run function.
> 
> Is there a way to force the connection/signal to release that shared_ptr?

This thread may discuss the same issue:
http://old.nabble.com/Re%3A--signals2--review--The-review-of-the-signals2-library-%28formerly-thread_safe_signals%29-begins-today%2C-Nov-1st-p22102367.html

Frank has stated that cleaning up the slot earlier is actually a tricky 
problem, because of the necessity to avoid possible race conditions.

Nonetheless I too would be interested in a fix that allows a 
disconnected connection involving a bound shared_ptr to destroy the 
shared_ptr instance.