yamt commented on PR #14348:
URL: https://github.com/apache/nuttx/pull/14348#issuecomment-2415754141
> Sorry, my commit message may not be clear enough.
>
> > > The malloc() function allocates size bytes and returns a pointer to
the allocated memory. The memory is not initialized. If size is 0, then
malloc() returns a unique pointer value that can later be successfully passed
to free().
> >
> >
> > do you mean to require host malloc to follow the specific behavior? why?
>
> I want to align the behavior of sim_heap(Customized heap manager) and
mm_heap(Default heap manager).
>
> The default heap management in nuttx returns a valid memory address when
malloc(0), In sim_heap, malloc(0) returns NULL. This PR makes malloc(0) in
sim_heap return a valid pointer
to me, this PR seems to make it return whatever host_realloc(..., 0) returns.
depending on the host os, it might or might not be NULL.
am i missing something?
if you want to make it return non-NULL, the usual trick is `if (size == 0) {
size = 1; }`.
> > > (See "Nonportable behavior" for portability issues.)
> >
> >
> > what exactly are you referring to here?
>
> This part is an excerpt from the man manual，It might be missing some
context, I've updated the commit message
ok. please don't forget that not everyone uses linux.
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