Hello Maxim,
> SW> And some embedded/old processor cores simply
> SW> don't have these very convenient instructions.
>
> Probably, you can use something like:
>
> disable_interrupts
> compare and exchange
> enable_interrupts
Sorry, I'm in user mode.
And disabling interrupts in user mode is not allowed.
Never the less, the construction that I used to fix the bug
was:
jthread_suspendall
compare and exchange
jthread_unsuspendall
Which looks rather similar to your suggestion and (if you
use jthreads) it's even portable. The jthread_suspendall is
a cheap way to temporarily prevent Kaffe's jthread
scheduler from scheduling.
Kind regards,
Walter
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