[Tinyos-devel] ENOMEM in TinyError.h

[Philip Levis]

On May 8, 2008, at 8:45 AM, David Moss wrote:
>
>
> Undocumented error codes are defined in custom applications.  Can we  
> suggest
> end users define error codes above 128 to avoid conflict with an  
> evolving
> TinyOS baseline?

Is the issue that components want to use the current error_t values  
but add new ones? One could always define a new app_error_t. Or is it  
that you want to use standard interfaces?

One approach is to define some content-free names for specific error  
codes, such as ECUSTOM1, ECUSTOM2, ECUSTOM3. Another is to define an  
ELAST, which is the last value+1, and allow systems to extend the set  
with unique() + ELAST. I think error codes are a slightly different  
beast than AM IDs, in that there aren't the same kind of  
interoperability issues.

Phil