Re: [boost] [xint] Boost.XInt formal review

Subject: Re: [boost] [xint] Boost.XInt formal review
From: Ivan Le Lann (ivan.lelann_at_[hidden])
Date: 2011-03-07 06:02:43

----- "DE" <satan66613_at_[hidden]> a écrit :

> on 07.03.2011 at 9:17
>  Jeffrey Lee Hellrung, Jr. wrote :
> > Another concern with COW in general is iterator invalidation. Either
> > your iterator gets "fatter" and slower (e.g., by being implemented as a
> > pointer to the object + offset), or you expand the class of operations
> > that invalidate iterators beyond just resizing operations to *any* 
> > modification operation (compared to a class which does not use COW).
> 
> been the cow atomically ref counted you will NEVER notice it's there

I can't wait for the day "atomic free" will be a marketing point, 
just like "lock free" is today.

> think of it: if an operation requires reallocation of the storage
> then anyway iterators are invalidated

Without COW, the iterators used in another thread are not invalidated,
since no data is shared.

Anyway, this whole thing sums up to: let me choose the container that suits
my needs.

Ivan