If you do use it, only do so sparingly and for allocations of no more than a
few hundred bytes.
http://stackoverflow.com/questions/1018853/why-is-alloca-not-considered-good-practice
From: Bradley Lowekamp
Sent: March 12, 2013 8:54 AM
To: <[email protected]> Developers
Subject: [Insight-developers] Using alloca
Hello,
I am thinking about using the "alloca" function in some code I'm working on for
ITK, and wonder what other people think of it or others experience...
From the BSD Library Functions Manual:
DESCRIPTION
The alloca() macro allocates size bytes of space in the stack frame of the
caller. This temporary space is automatically freed on return.
I am planning on using it for some dimension sized array in compiled
templateless code, in lieu of C99 dynamic stack based arrays.
Best as I can tell Windows defines it as _alloca, so a little CMake try compile
is going to be needed, not a big deal.
Thanks,
Brad
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