Robert, Thanks for the reply, however it's not that something is not working. I am just trying to understand boost and how it works as a personal professional development exercise. It just happens to be that I am looking at interprocess - I could have started looking at something else but it relates to some coding I have done myself. I suppose it is a general question about advanced template programming and I think it is a valid one for this group. But I am certainly open to a better suggestion for where I can get the information I seek. ----- Original Message ----- From: Robert Jones To: boost-users@lists.boost.org Sent: Tuesday, March 16, 2010 5:32 PM Subject: Re: [Boost-users] Possibly too newbie a question? On Tue, Mar 16, 2010 at 5:44 PM, Eric Whitcombe <ericwsf@gmail.com> wrote: I haven't received any response to my question. If this is is not the appropriate forum I would appreciate some suggestions as to where to ask the question. I have gone over the mailing list groups page and this seems to be the place to ask it but I could be wrong. I am stepping through interprocess shared memory code and I was a little confused by the offset_ptr code that I was hitting*. I cannot figure out how that is specified to the template of rbtree_best_fit. I see in boost/interprocess/interprocess_fwd.hpp the declaration of managed_shared_memory by typedef'ing basic_managed_shared_memory with rbtree_best_fit<mutex_family> as the AllocationAlgorithm argument but I can't figure out how offset_ptr is is supplied as the VoidPointer argument to the rbtree_best_fit template. That template has 3 arguments but the forward declaration only provides one. Are the other two somehow inferred? If so, how? * I have looked at the documentation for interprocess - including the explanation of offset_ptr. I understand the need for it. I just don't see how it is incorporated into the rbtree_best_fit template. Hi Eric - I don't have the knowledge to answer your question I'm afraid, but as a general comment your question is too vague and general. You might get a better response by composing the shortest example bit of code that demonstrates your point, and then asking why line 'X' doesn't work/compile or whatever. It's generally easier to answer highly specific questions rather than general ones, and then you have to do the generalisation. Hope that helps a little. Regards, Rob. ------------------------------------------------------------------------------ _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users