Re: [Boost-users] [InterProcess] Compatibility with Boost multi_array

From: Ion Gaztañaga (igaztanaga_at_[hidden])
Date: 2008-03-19 04:53:20

sankar lingam wrote:
>    
>  
>             I made the following wrapper over the Boost.InterProcess 
> Allocator,
 >
> [...] 
> 
> and used the shared_allocator as the allocator to Boost.multi_array and
> 
> I find it working fine. The boost multi_array allocates and deallocates 
> the memory
> 
> through shared_allocator.
> 
> Am I doing something wrong here??Can it be used this way??

MultiArray will store a raw pointer as a member. This means that if two 
processes map the shared memory in different addresses, the process that 
didn't create the MultiArray will crash.

This can only work if all processes exactly map the shared memory in the 
same address. MultiArray adaptation would require using 
allocator::pointer instead of raw pointers as member pointers. In case 
you find it useful, latest (SVN) Boost.Multiindex is compatible with 
Boost.Interprocess.

Regards,

Ion