Stuart Et. Al.,
> I may be mistaken, but I think in RTAI/RTL, you can set a
> semaphore from
> within the ISR, exit and on exit the real-time task/thread
> will run its
> code. If it doesn't work this way, it would be nice to have this
> facility available as this is typical of the sort of thing I
> used to do
> with pSOS.
That is exactly the same structure I used in VxWorks. I was under
the impression, from messages on the list, that this did not work in RTL.
As far as semaphores go, I demand a stable base for RTL, so I am
still using RTL 2.2 on Linux 2.2-14. This version does not contain
semaphores as near as I can tell. I am also not certain that semaphores
work as expected in V3. Anybody want to fill us in (after answering my
original question)?
It seems to me that the semaphore handling routines should simply
check to see if anyone is waiting for a semaphore (when it is given) and, if
so, call the scheduler. The scheduler should also be called on return from
every interrupt. Is this the case?
Still Confusedly Yours,
Steve
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