[Bacnet4linux-developer] Re: Blocking Calls and Threads

[Steve K. <st...@ka...>]

Hi Coleman,

>>Okay.  I suppose that we need to think about making the rest of the code
>>thread safe, which it currently is not (i.e. globals and function static
>>variables).
> 
> I already did some of that.  My code is so different from what's in Sourcesafe 
> that I should probably create another dev tree.  How would I do that?  

Well, you did it once with the MS/TP checkin ;-)  Perhaps just use CVS 
and import the new project.  bacnet-mt or something.  Perhaps someday we 
can collaborate on the work and the core files, but until then multiple 
projects might be the way to go.  I would be interested in seeing your 
router code someday.  Did you see the new project that Joel created on 
SourceForge for routing?
http://sourceforge.net/projects/bfr/

> You hit the nail on the head (as always).  Tags sound like the way to go.  
> 
> However, my level of confusion grows exponentially when I start trying to 
> understand tags as they're described in the BACnet spec.  Can you (or is 
> there a tutorial or something) help be better understand them?

bacdcode.c has some information about data type tags, but it all came 
from the BACnet Standard, clause 20, Encoding BACnet Protocol Data 
Units.  When trying to figure out how to encode or decode a message, 
that is the clause that I go to.

There is another document, "Understanding BACnet Encoding," on the 
BACnet.org site that talks about tags and other low level details:
ftp://ftp.bacnet.org/Encoding.doc

Best Regards,

Steve
PS: I am sending this along to the developers list.
-- 
http://kargs.net/