FreeLists / openbeosnetteam / [openbeosnetteam] Re: NetDebug.h break BC

["Axel Dörfler" <axeld@xxxxxxxxxxxxxxxx>]

Philippe Houdoin <philippe.houdoin@xxxxxxx> wrote:
> So, based on this HOW-TO, the current/headers/os/net/NetBuffer.h
> break BC because:
> 
> - the protected status_t m_init should be somewhere. 
> I guess fInitialized make a good candidate to be replace by m_init...

AFAICT the NetBuffer.h is very different from the one in R5:
- different class size; R5's header only has two variables, one of them 
is protected (m_init), and must be exported, and m_impl which could be 
used for anything (also with another name) - all other variables must 
be removed, also the fPrivateData[] field doesn't match reality, since 
there aren't any reserved variables.
- the reserved virtual slots have been removed and must be added again 
to have the same vtable size and layout.

> How I understand it, the order in which variables appears 

protected variables must be on the same location, with the same name 
(for source compatibility), private variables can be moved and renamed, 
though.

> - And what about the newly added protected variables fData, 
> fDataSize, fStackSize, fCapacity? No issue here?

There is no space in the class left, so they had to be removed. (you 
could use the m_impl as the private data field - which would obviously 
be the same as it is now).

Adios...
   Axel.