Re: Calling the streamReload IOC Shell function within C

["Zimoch Dirk \(PSI\) via Tech-talk" <tech-talk at aps.anl.gov>]

Hi Andy

You can call extern „C“ long streamReload(const char* recordname) directly from C/C++. If NULL is passed for recordname, then all StreamDevice records reload. If a record is in the middle of processing, the running protocol is aborted and the record goes to INVALID alarm until the next processing.

It seems I have forgotten to put the function prototype into devStream.h. Will be done in the next release.

Dirk

> Am 22.01.2022 um 06:08 schrieb Michael Davidsaver via Tech-talk <tech-talk at aps.anl.gov>:
> On 1/21/22 19:39, Wang, Andrew via Tech-talk wrote:
>> This is a far-fetched question, but I was wondering whether there is a possibility of executing streamReload, or a similar functionality, within a C function. The reason why I ask is because I saw within this Github link (https://github.com/epics-modules/ioczed/blob/master/zzzApp/Db/streamExample.db <https://github.com/epics-modules/ioczed/blob/master/zzzApp/Db/streamExample.db>) that the SUB record calls streamReload. However, I couldn’t locate the source code for that, so I am not entirely sure how it is used and what its arguments are. Thoughts?
> 
> The registrar code adding both the function callable
> from subRecord as well as iocsh.
> 
> https://github.com/paulscherrerinstitute/StreamDevice/blob/dfbd308d4602e7cb99d7f60ddf35909a70f41c4f/src/StreamEpics.cc#L297-L307
> 
> So you could do something like
> 
>> iocshCmd("streamReload");
> 
> cf. iocsh.h from Base.
> 
> Since it is already callable from a subRecord I assume
> it is thread-safe.