Re: [boost] Re: cyclic ptr (was: Re: Re: Re: Re: Re: Re: Re: Proposals: p2m offsets, prebuild<>, squad_ptr<> (of course))

From: Greg Colvin (Gregory.Colvin_at_[hidden])
Date: 2002-09-07 12:26:36

At 10:39 AM 9/7/2002, Larry Evans wrote:
>Larry Evans wrote:
>
>>Greg Colvin wrote:
>>
>>Anyway, the shared_ptr and shared_count also were modified to allow this.  I could
>>post these if you want, or I could give further explanation.  I realize this is kinda sketchy,
>>but let me know and I try and be clearer.
>Another modification I was thinking of was using the allocator from the conservative
>collector of cmm (ftp://ftp.di.unipi.it/pub/project/posso/cmm/cmm.tgz). I figured
>it could be used to enumerate all the allocated objects (much like iterating
>through cyclic_ptr's recycler's handles).  In addition, since this is a conservative collector,
>it would be easy to check for any leaks.  What do you think?  Also, it could be used
>to eliminate the need for a weak_ptr count (as mentioned in my earlier post about "conserve+
>shared_ptr advantages.")

Sounds like a tradoff -- the advantages of a custom allocator versus the
convenience to the user of using whatever allocator they want.  Also, a
conservative collector can fail to release memory.  And besides, if you
are going with a conservative collector there is no need for any smart
pointers.