Re: [Drizzle-discuss] Removing Array custom vector allocation for semi-join subqueries

[Konstantin Osipov]

* Monty Taylor <mordred@stripped> [09/02/27 10:21]:
> > My C++ skills have faded given what I work on. What does C++ have that
> > is similar to mem_root? That is, I want an allocator to be used with a
> > variety of STL classes for which I will deallocate everyting all at
> > once but at some random point in the future. And since I don't want to
> > have to retain handles to everything that has been allocated, I prefer
> > to invoke deallocate on the allocator rather than all of the objects
> > that have been allocated from it.
> 
> No. C++ does not have a thing that behaves exactly like mem_root does.
> You could build one, but it would be (and is) a bad idea, because things
> you're allocating in C++ are objects, and you need to run destructors on
> them, and because then you'd be trying to program idiomatic C in C++.

Memory life cycle != object life cycle. Mark, you need to look at
STL allocators. 


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