Synchronizing auxiliary mutex data

[Andreas Schwab]

On Jun 20 2017, Torvald Riegel <triegel@redhat.com> wrote:

> I described exactly that above.  It is guaranteed for the code above by
> the memory model.  Implementations of the memory model (so in our case,
> the compiler and the HW) have to ensure that.  For example, in the x86
> memory model, acquire and release MO are implicit, so because the
> compiler is not allowed to reorder in this case, the HW ensures that
> lock()'s write to owner happens after unlock's write to owner.

What about the read in the locking thread?

Andreas.

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Andreas Schwab, SUSE Labs, schwab@suse.de
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