Re: alloca / _alloca / dynamic stack memory

"Michael Crawley" <Michael Crawley@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in
message news:3EFCAF3F-7BF3-4641-AE18-0488FB97D545@xxxxxxxxxxxxx
The
most popular is alloca(size_t), which is not found in the default
libraries of many C++ compilers. If I am not mistaken, I do not
believe VS 2003 had it, but VS 2005 has it.

_alloca (with leading underscore) has been there since at least VC6.

It is my understanding
that developers can invoke alloca(size_t) to allocate memory on the
stack and pass the allocated memory reference as a parameter into
placement new.

Why not just declare a local variable? It would go on the stack, and
would be constructed and destroyed automatically.

What exactly are you trying to achieve? I'm missing the point of the
exercise.
--
With best wishes,
Igor Tandetnik

With sufficient thrust, pigs fly just fine. However, this is not
necessarily a good idea. It is hard to be sure where they are going to
land, and it could be dangerous sitting under them as they fly
overhead. -- RFC 1925


.

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