Experimental Physics and
Industrial Control System

Benjamin Franksen <[email protected]> · Mon, 16 Mar 1998 16:09:58 +0100

Jeff Hill wrote:
> I still worry that an exception might occur while intLock() is applied,
> but perhaps this risk is worth taking in order to allow unconstrained
> synchronized access to globally known variables.

I must admit, I am not exactly sure what happens in case of an
exception/interrupt if there is an intLock active.

Are interrupts (on VME processor cards) completely lost if currently
blocked by an intLock? Or are they queued or cached somehow so that the
handler will only be called a little later?

How often does VxWorks itself call intLock?

Is there a way resp. does it make sense to test this?

Marty Kraimer wrote:
> 
...SNIP
>
> Ok it sounds like there are no strong objections to intLock/intUnlock.
> 
> Benjamin can you make and test the changes?

Yes. I will ask my colleague (Goetz Pfeiffer, who uses Symb support
heavily) to incorporate the changes and let his application run with it.

	Ben
-- 
The Notorious Neb Nesknarf
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System