Subject: Re: [Boost-users] [interprocess] 32 to 64 bit ?
From: Ion Gaztañaga (igaztanaga_at_[hidden])
Date: 2009-04-20 16:45:00
Allen Cronce wrote:
> I was very excited about using the interprocess library to solve a set
> of problems in our current project, until I saw this post. We have to
> support 32 and 64 bit binaries. Falling back to using the low level
> utilities like mapped_region means that much of the appealing
> functionality from the interprocess library is unavailable to us.
Yes, you loose a lot of funcionality, but
> I understand that certain functionally between different sized address
> spaces doesn't make sense. A very large shared space from a 64 bit
> process would not be addressable in 32 bits. But I doubt that people are
> really using this library to share address spaces larger than 4 gig.
> More than likely developers want to share comparatively small amounts of
> data between processes.
>
> Is there any plan to add support for 32/64 bit in the future?
It's not that I don't find it interesting, especially the goal of having
(if the ABI of two compilers is the same) portable managed segments
(all internal poitners might be offset_ptr_32 or uint32_t, etc...). That
would allow also quite portable (supposing alignment is correctly
configured in the compilers) mapped files. But this requires a huge
effort (I would need to rewrite all the allocation algorithms,
containers, allocators, etc...) and I don't have time to implement this
type of costly features.
Best,
Ion