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<== Date ==> <== Thread ==>

Subject: RE: Race condition during IOC startup?
From: Mark Rivers <[email protected]>
To: "Zhang, Dehong" <[email protected]>, "[email protected]" <[email protected]>
Date: Fri, 22 Feb 2013 22:08:01 +0000
What device support and drivers are you using?

It is necessary to wait to do callbacks until iocInit is complete.  This can be done by not doing callbacks until interruptAccept is 1.  

The asynPortDriver base class takes care of this for you, by creating a thread that waits for interruptAccept and then doing all callbacks that the driver has requested.

Mark

________________________________________
From: [email protected] [[email protected]] on behalf of Zhang, Dehong [[email protected]]
Sent: Friday, February 22, 2013 4:00 PM
To: [email protected]
Subject: Race condition during IOC startup?

Hi,

I seem to have such a problem: when my IOC starts up, some of my records
want to callback almost immediately.  Then my IOC crashes, because the "onceQ"
related stuff are not created yet -- is this possible?

Is it safe to move the "scanInit" call in iocBuild to just before "initDrvSup"
(EPICS base 3.14.12, src/misc/iocInit.c)?

Thank you for your advices!  Best regards,
Dehong





References:
Race condition during IOC startup? Zhang, Dehong

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