Experimental Physics and
Industrial Control System

Marty Kraimer <[email protected]> · Wed, 16 Apr 2003 06:12:05 -0500

Benjamin Franksen wrote:

Hi Marty (and all),
one important limitation (at least in 3.13.x) is missing in appDevGuide:
 dbNotifyCancel must not be called from interrupt context.
I did and very bad things happened. BTW, i wonder what will happen if
such a record (i.e. one with asynch soft support) is processed as a
result of a ca_put_calback. Hmmm...
Ben

VERY few things can be called from interrupt context.

The Application Developer's Guide says if a routine can get called from
interrupt routines. If it does not say this it should be assumed that the
routine can't be called from interrupt context.
Note that the following can be called from interrupt level
callbackRequest
callbackRequestProcessCallback
scanIorequest
One of these should be all you need. For example callbackRequest can cause a
user supplied routine to be called by a general purpose callback thread.
Marty Kraimer

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System