Re: [boost] [ptr_container] and [multi_index] and [thread] - capable containers ?

From: Thorsten Ottosen (thorsten.ottosen_at_[hidden])
Date: 2006-11-21 07:16:29

Janek Kozicki wrote:
> Thorsten Ottosen said:     (by the date of Tue, 21 Nov 2006 00:03:21 +0100)

> I'm still thinking how to best refactor my current containers. They
> are in bad need for refactoring and I'm still not sure where to go.
> MultiIndex + PtrContainer are one of alternatives. If it turns out
> that this is the way to go, I will want to try this task.
> 
> Also I'm sure that my new container will have to support threading. I
> was thinking about something like accessor methods that will lock for
> reading and lock for writing:
> 
> template <T>
> class my_superb_container {
> 
> // only one can write to item 'item_index', no reading allowed
>     T& lock_write(int item_index); 
> 
> // multiple reads of item 'item_index' are allowed, no writing
>     const T& lock_read(int item_index);
> }
> 
> Lock will be released when leaving current block, in the destructor.
> (destructor of what? - still thinking about that).

It seems like a bad idea to mix threading into the container itself. 
Threading should be an orthogonal issue; once you have the container 
design worked out, threading can be added by your-self on top of that.

-Thorsten