Experimental Physics and
Industrial Control System

"Hu, Yong" <[email protected]> · Fri, 30 Nov 2012 19:43:02 +0000

I guess "r" in rsrv stands for "resource". see [1] and search "rsrv", it says: Channel access ioc resource server library.

[1] http://www.aps.anl.gov/epics/base/R3-14/12-docs/README.html 

HTH,

Yong

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Andrew Johnson
Sent: Friday, November 30, 2012 11:47 AM
To: Jack Smith
Cc: [email protected]
Subject: Re: caRepeater object code not cross-compiled in R3.14.12.2

Hi Jack,

On 2012-11-30 Jack Smith wrote:
> 
> I am trying to look through base-3.14.*/src/misc/iocInit.c. I guess 
> the only function related to caRepeater would be rsrv_init(). Then I 
> take a quick look at src/rsrv/caservertask.c, but still don't see how 
> the caRepeater get spawned. Could you tell me how the caRepeater is 
> started during iocInit? Also what does "rsrv" mean / stand for?

As Ralph said, the repeater is started by the CA client library, so the call chain from iocInit() is that iocBuild() calls db/dbCa.c:dbCaLinkInit() which starts dbCaTask() in its own thread, and that calls ca_context_create() to initialize the CA client library and start the repeater if necessary.  Then later on iocBuild() also calls as/asDbLib.c:asInit() which can also initialize the CA client library via the code in as/asCa.c:asCaStart() although normally the dbCaLinkInit() would have taken care of that.

I don't know what the "r" in rsrv stands for either; if he's reading this Jeff Hill might remember...

HTH,

- Andrew
--
Computer science is as much about computers as astronomy is about telescopes. -- Edsger Dijkstra

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System