On Thu, Aug 28, 2025 at 5:26 PM Philipp Klaus Krause <p...@spth.de> wrote: > do any of you use realloc(p, 0) for non-null p?
It seems that you are not alone in asking yourself that. https://lwn.net/Articles/995196/ In my code I use realloc to ensure the sizing of an array is correct, relying on realloc returning an usable pointer. I admit to very rarely realloc to 0, but my code always assumes a non NULL, unique, pointer is returned that it can reuse for another realloc call. As, when I get NULL from realloc, I'm always treating it as an ENOMEM and fail the execution accordingly. It also makes sense as it preserves the symmetry : * malloc/calloc does reserve an mem area * realloc does change the mem area size * free does dispose of the mem area And to me a pointer to a 0 sized mem area has a different meaning than a simple pointer to NULL, since that area might still be prefixed/suffixed by metadata. Cheers, -- Steve Schnepp _______________________________________________ Sdcc-user mailing list Sdcc-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sdcc-user
