Re: [boost] RFC - lifetime management

From: Martin Schulz (Martin.Schulz_at_[hidden])
Date: 2007-09-18 04:16:49

> For classes with loads of RAII object members, usage could 
> look like this:
> 
>   class Foo {
>     Foo()  {
>       keep_alive_.put(new RAIIBar(...));
>       keep_alive_.put(new RAIIWhatever(...));
>     }
>   private:
>     heap keep_alive_;
>   };

To me, that sounds very much like a std::vector<boost:shared_ptr<void>
>:

  typedef std::vector<boost::shared_ptr<void> > heap;

  class Foo {
    Foo()  {
      keep_alive_.push_back(boost::shared_ptr<RAIIBar>(new
RAIIBar(...)));
      keep_alive_.push_back(boost::shared_ptr<RAIIWhatever>(new
RAIIWhatever(...)));
    }
  private:
    heap keep_alive_;
  };

Does this do what you intended? 

With a bit of syntactic sugar, it would be possible to avoid the
intermediate shared_ptr type, probably. I consider all real work already
done. 

> Support should be added for putting shared_ptrs and 
> auto_ptrs. 

You get this for free with the above.

> I have a wide variety of naming suggestions and an 
> extended interface for premature deletion but I'll save those 
> for a later post.

keep_alive_.erase(keep_alive_.begin()+n); 

Should do that. Again, some syntactic sugar might help.

Is that what you thought about?

Yours,
        Martin.

-- 
Dr. Martin Schulz (schulz_at_[hidden])
Software Engineer 
Synopsys GmbH 
Karl-Hammerschmidt-Str. 34
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