[lwip-users] Re: [lwip] mem_realloc bug?

[Adam Dunkels]

Hi!

On Mon, 2002-08-05 at 20:33, Earle Clubb wrote:
> I noticed that if mem_realloc() in mem.c is called in an attempt to increase
> the size of a given memory block, mem_realloc does nothing and returns no
> errors.  Is this a bug or is it there by design?

It is there by design - it wasn't intended to be used to increase the
memory allocation.

> 1) Why doesn't mem_realloc have the capability to increase the size of a
> memory block?
>
> 2) Is there a reason why it should not be added?

The reason was quite simple; it wasn't needed for anything in the lwIP
stack.
 
> 3) I believe that an error should be returned if mem_realloc cannot
> accomodate the requested new size.

That probably would be a better way to handle it.

Actually, I have been thinking about the necessity of the mem_realloc()
function as it is very rarely used in lwIP. I suppose you are using it
for something in your code - what is your oppinion about it?

/adam
-- 
Adam Dunkels <address@hidden>
http://www.dunkels.com/adam/

[This message was sent through the lwip discussion list.]