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Subject: Re: iocShutdown() hooks
From: Andrew Johnson <anj@aps.anl.gov>
To: Michael Davidsaver <mdavidsaver@gmail.com>, EPICS core-talk <core-talk@aps.anl.gov>
Date: Tue, 30 May 2017 11:42:56 -0500
Hi Michael,

On 05/25/2017 09:06 AM, Michael Davidsaver wrote:
> I've realized that I need to hook into iocShutdown() to be able to
> automatically shutdown QSRV during unittests.  I need to do so during
> the "stop" phase (eg. scanStop()) before records and lockSets are free'd.
> 
> My first though would be to use initHooks.h.  So I'd like to add
> 
> * initHookAtShutdown  - at start of iocShutdown()
> * initHookAfterCloseLinks - after dbCaShutdown()
> * initHookAtStopped - Just after iocShutdown() returns

No objections in principle, but a cleaner option might be to add methods
to the dbServer structure (which QSRV should support if possible) and
make the rsrv_init(), rsrv_run() and rsrv_pause() calls in iocInit into
calls to all registered servers through this interface. The
dbRegisterServer() call in rsrv_init() would move into a registrar
routine referenced in a new rsrv.dbd file.

Will QSRV support pausing? This was added for DESY's hot-standby work; I
don't see it as particularly important, but QSRV should probably display
a warning message when someone tries to use it if it's not supported.

- Andrew

-- 
Arguing for surveillance because you have nothing to hide is no
different than making the claim, "I don't care about freedom of
speech because I have nothing to say." -- Edward Snowdon

Replies:
Re: iocShutdown() hooks Michael Davidsaver
References:
iocShutdown() hooks Michael Davidsaver

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