Re: [Boost-users] [interprocess]files locations for mutex and named shm

Subject: Re: [Boost-users] [interprocess]files locations for mutex and named shm
From: Mike Spertus (mike_at_[hidden])
Date: 2009-07-30 13:13:21

I'm being bitten by the surprise discovery that different Windows users
can't(?) communicate via named shared memory using Boost Interprocess as
in the post below from 2008-09-18 (Changing all processes to use the
same TMP directory is not an option for us due to interoperability
requirements).  Is there a workaround? Was anything ever done about the
proposed solution below? Another alternative would be to make it
possible to specify the "Boost Interprocess temp directory".

Mike

Eugen Stoianovici wrote:
>
> Ion Gaztañaga wrote:
> > Eugen Stoianovici wrote:
> >> Ion Gaztañaga wrote:
> >>> You can't, unless you modify the code in:
> >>>
> >>> boost/interprocess/detail/temp_dir_helper.hpp
> >>>
> >>> Why do you want to change the location of those files?
> >>>
> >>> Ion
> >> This is only a problem if you run processes with different users. Ex:
> >> if you're using shared memory between an user app and a service, the
> >> service will look for the segment in C:\Windows\Temp\ and the user
> >> app will look for it in C:\Documents and settings\user\local
> >> settings\etc.
> >> My changes should go in the temp_dir_helpers.hpp file, right?
> >
> > Good point. I'll try to see if I can unify this when I have a bit of
> > time. Maybe we can find a common directory for all processes. Any hint
> > or suggestion?
> >
> On XP C:\Windows\Temp would be a good idea but i don't know if it is
> writable by all users. I'm going to look into it when i get the chance,
> but for now, changing the "TMP" env to something else is enough for me.
>
> Thanks again,
> Eugen Stoianovici