Re: What's wrong with alloca() ?

In article 92-01-020 pcg@aber.ac.uk (Piercarlo Grandi) writes:
> void withvector(proc,bytes)
> void (*proc)(/* char *, unsigned */);
> unsigned bytes;
> {
> char *vector = malloc(bytes);
> proc(vector,bytes);
> if (vector)
> free(vector);
> }


This implementation doesn't free the vector if proc exits via longjmp().
One of the advantages of stack allocation is that nothing special has to be
done to free the data. There's absolutely no way it can stick around when
you exit the stack frame by any means.
--
Barry Margolin, Thinking Machines Corp.


barmar@think.com
{uunet,harvard}!think!barmar
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