[ECOS] Determining current context

David Brennan eCos@brennanhome.cxm
Tue May 27 08:15:00 GMT 2003

On Mon, 2003-05-26 at 14:38, Gary D. Thomas wrote:
> On Mon, 2003-05-26 at 11:51, David Brennan wrote:
> > Is there a function somewhere which will tell my code what context it is
> > currently in?
> > Specifically this is for i386-pc platform if that matters.
> What sort of context are you referring to?  Do you mean ISR vs DSR vs
> thread?  In this case, you'll just have to know by design.  In other
> words, an ISR will be a particular piece of code that only runs as
> a direct result of an interrupt.  This code should not be used any
> other way.  Similarly, a DSR is only run as a result of an ISR causing
> it to be dispatched.  All other code is thread code.
> -- 
> Gary D. Thomas <gary.thomas@mind.be>

That was the impression that I got from the sample code.  However, I
have a generic function which I would like to be able to call from any
context, but it must behave slightly differently in interrupt context. 
I was hoping that there was an operating system call of some sort which
could tell me.  (Obviously it must know the current context).  I'd even
settle for something as crazy as checking to see if the current stack
area is the isr area.

David Brennan

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