Re: [boost] [Boost.utility]

Subject: Re: [boost] [Boost.utility]
From: Stewart, Robert (Robert.Stewart_at_[hidden])
Date: 2010-01-26 17:11:18

GMan wrote:
> Frank Mori Hess wrote:
>
> > If you peel off the singleton aspect of singletons, you're
> > left with global
> > state and lazy initialization.  A facility that supports
> > thread-safe lazy
> > initialization might be useful, but why tie it to global
> > state (which is of more dubious value)?
>
> Hm, good point. Perhaps there are three  "levels" here:
>
> 1) Thread-safe, lazy initialized, general creation methods
> 2) 1 with global access
> 3) 2 with guaranteed same-instance access.

What does "global access" mean to you that isn't embodied in 1)?

As I see it, you declare an extern instance of 1) in a header and you have 2).  global<T> is a template, so it could have a static member that could be initialized in a header, but then you could only have one.  I'm confused.

_____
Rob Stewart                           robert.stewart_at_[hidden]
Software Engineer, Core Software      using std::disclaimer;
Susquehanna International Group, LLP  http://www.sig.com

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