[boost] Re: Proposal: Efficient Pointers

From: Philippe A. Bouchard (philippeb_at_[hidden])
Date: 2002-07-15 23:08:23

Here is shared_ptr.h with little corrections...

Philippe

"Philippe A. Bouchard" <philippeb_at_[hidden]> wrote in message
news:ah005q$b1s$1_at_main.gmane.org...
> Greeting,
>
>     After a usefull discussion under comp.lang.c++ newsgroup I've made
some
> modifications to pointers I've already suggested.  I am proposing two
> different pointers that emphasize efficienty:
>
> mutable_ptr<>:
>     - literally breaks some compiler assertions that prevents
> std::auto_ptr<> from being easily copied;
>     - is really beneficial for STL container self destructions - believe
me;
>     - copies are a lot easier to manage: work with secondary pure pointers
> assignments;
>     - member declarations identical to std::auto_ptr<>;
>     - as fast as std::auto_ptr<>.
>
> shared_ptr<>:
>     - functionality is similar to boost::shared_ptr<> except:
>         - reference counters are merged with instanciated objects:
>             - operator new () is called once in the end (like
> boost::shared_ptr<>);
>             - the pointer is same size as sizeof(void *);
>             - reference counters are not copied when assignments are
called;
>         - little drawback: assignments work only with other
> fdi::shared_ptr<>
>     - the only change from std::auto_ptr<> interface was that release()
was
> renamed to share();
>     - faster than boost::shared_ptr<>.
>
> A personnaly prefer using mptr<> and sptr<> because the code is easier to
> read in one line.  I won't recommend macros but simply to rename classes.
> One other thing: the fdi:: namespace is volatile.  I hope someone will
share
> the same vision of efficienty benefits I have.
>
>
>
> Thank you,
>
> Philippe A. Bouchard
>
>
>
>

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----
>
>
>
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begin 666 shared_ptr.h
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`
end