> m_ioService.post(m_strand.wrap(
>                             boost::bind(&LogWriter::append,
> (*logWritersItr), _logMessage, _logLevelString)
>                          ));
>
> The second param of Bind, (*logWritersItr), is a shared_ptr of LogWriter's
> subclass. The signature of LogWriter::append() is as following:
>
> virtual void append(const std::string& _logMessage, const std::string&
> _logLevelString) = 0;
>
> Base on document at
> http://www.boost.org/doc/libs/1_44_0/libs/bind/bind.html, the way I use bind
> will duplicate a copy of that shared_ptr. Any idea when will the duplicated
> shared_ptr become invalid so that the reference count decreases by one?

bind() takes your shared_ptr by value, so it won't become "invalid".
After io_service executes your functor, it will be destroyed, so all
its internal copies of that shared_ptr will be destroyed as well.
_______________________________________________
Boost-users mailing list
Boost-users@lists.boost.org
http://lists.boost.org/mailman/listinfo.cgi/boost-users