Hello,
unfortunately I couldn't find the answer in the documentation. If the
scheduler runs a DSR. Can this DSR become interrupted by an other thread or
another DSR? (Of cause an ISR can interrupt it)
The background is that I wanna share data between a thread an a DSR and
want to know whether I have to call cyg_(un)lock_scheduler when changing
the data.
And another question about that - how are memory barriers implemented in
eCos? (Are they implemented at all?)
Background: I have - for example - a status bit field that is copied to a
(ISR/DSR) shared variable in the ISR. Now - if the compiler decides to put
this variable into a register (in the ISR function) the DSR will get the
wrong data. I could of cause declare the variable as volatile but this
might be a performance issue in other cases where more data is affected.
Best regards,
Martin Laabs
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