Re: [boost] [lexical_cast] optimization commited to HEAD

From: Jeff Garland (jeff_at_[hidden])
Date: 2006-08-27 16:45:11

Peter Dimov wrote:
> Jeff Garland wrote:
> 
>> The current lexical_cast makes no claim of thread safety so why would
>> you expect an optimization to?
> 
> The default level of thread safety shall always be "basic", and since 
> lexical_cast has no state, this means that it should be usable in a threaded 
> program without explicit synchronization.
> 
> Components wouldn't be able to use lexical_cast for fear of stepping on each 
> other's toes otherwise. 

They can't. lexical_cast uses iostreams which has global data like the global 
locale and no guarantee of "thread safety" w.r.t to this global state.

Jeff