Re: [boost] boost::bimap and boost::interprocess

Subject: Re: [boost] boost::bimap and boost::interprocess
From: Andrey Semashev (andrey.semashev_at_[hidden])
Date: 2013-01-25 05:37:32

On Friday 25 January 2013 11:20:48 Matias Capeletto wrote:
> Hi Joel,
> 
> On Thu, Jan 24, 2013 at 10:54 PM, Joel Young <jdy_at_[hidden]> wrote:
> > I've been trying to get boost::bimap to work in a
> > boost::interprocess::managed_mapped_file.
> > 
> > The other program (bimap.c++) does exactly the same thing, but when
> > run the second time it crashes.  My guess is because bimap isn't quite
> > interprocess compatible---that is, it isn't using the provided
> > allocator for EVERYTHING.
> 
> That is not the problem in this case, Bimap is just given your
> allocator to MultiIndex.
> The issue is that the map views (left, right and relation set) are
> initialized with a reference to the multiindex core in construction
> time... when interprocess read it from memory the second time this
> references are garbage. A direct solution will be to use interprocess
> offset_ptr, but that will have a performance hit so I will have to
> rethink how the views are accessing the core, probably using CRTP.

Is it possible to port both Boost.MultiIndex and Boost.Bimap to 
Boost.Intrusive? The latter is capable of being process-independent (this 
feature is used in Boost.Interprocess). I guess this would also simplify 
Boost.MultiIndex significantly.