Re: [boost] interprocess with unordered_map

Subject: Re: [boost] interprocess with unordered_map
From: Olaf van der Spek (ml_at_[hidden])
Date: 2012-03-23 19:50:39

2012/3/23 Ion Gaztañaga <igaztanaga_at_[hidden]>:
> El 23/03/2012 12:57, Olaf van der Spek escribió:
>>
>> 2012/3/23 Ion Gaztañaga<igaztanaga_at_[hidden]>:
>>>
>>> El 21/03/2012 22:56, Joel escribió:
>>>
>>>> Perhaps the interprocess docs can be updated to show how to create a
>>>> simple
>>>> allocator from the heap for easy creation of these temporary copiers and
>>>> how to
>>>> cleanly provide the thunking between "normal" equivalent types (e.g.
>>>> strings)
>>>> and those used in memory regions (basic_string).
>>>
>>>
>>>
>>> Interprocess allocators would require changes to support that and I need
>>> to
>>> think about it, but I definitely think it should ease this task, as it is
>>> demanded by users.
>>
>>
>> There's still no technical reason to require this copy, is there?
>> Can't we come up with a solution that avoids this copy?
>
>
> Without changing the container the copy (either implicit or explicit) is
> unavoidable. In those cases, maybe we can avoid a shared memory allocation
> (which will be always slower than a heap allocation) for that copy.

What's stopping us from changing the container?

-- 
Olaf