[ECOS] diag_printf

[Pete Barrie]

At 14:19 05/03/2003 -0700, you wrote:
>On Wed, 2003-03-05 at 14:08, Pete Barrie wrote:
> > At 13:58 05/03/2003 -0700, you wrote:
> > >On Wed, 2003-03-05 at 13:53, Pete Barrie wrote:
> > > > Can somebody tell me what the mutual exclusion issues are with
> > > diag_printf()
> > > > I cannot find anything specific in the documentation.
> > >
> > >What sort of issues are you thinking about?
> >
> > I was wondering whether it was thread-safe.
> > I take it that it isn't...
> >
>
>It is because interrupts are always off for the duration of
>the call to diag_printf().

Gary, many thanks for that clarification. I understand exactly how it is 
set up now.


Pete


> >
> > Thanks
> >
> > Pete
> >
> >
> >
> > >'diag_printf()' is designed to be "straight to the hardware",
> > >mainly used for diagnostic purposes.  As such, it will access
> > >the hardware directly, without any regard for other threads
> > >or uses of the diagnostic device.  If you are using a serial
> > >port that is also used for diag_printf(), then the diagnostic
> > >purpose simply wins.  Other uses of the same hardware are
> > >possible, but they need to be cognizant of these facts.
> > >
> > >--
> > >.--------------------------------------------------------.
> > >|       Mind: Embedded Linux and eCos Development        |
> > >|--------------------------------------------------------|
> > >| Gary Thomas              email:  gary.thomas@mind.be   |
> > >| Mind ( http://mind.be )  tel:    +1 (970) 229-1963     |
> > >| gpg: http://www.chez-thomas.org/gary/gpg_key.asc       |
> > >'--------------------------------------------------------'
> > >
> > >
> > >--
> > >Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
> > >and search the list archive: http://sources.redhat.com/ml/ecos-discuss
>--
>.--------------------------------------------------------.
>|       Mind: Embedded Linux and eCos Development        |
>|--------------------------------------------------------|
>| Gary Thomas              email:  gary.thomas@mind.be   |
>| Mind ( http://mind.be )  tel:    +1 (970) 229-1963     |
>| gpg: http://www.chez-thomas.org/gary/gpg_key.asc       |
>'--------------------------------------------------------'


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