AMDG

On 03/27/2014 09:09 AM, Elad Moshe wrote:
>> If both threads tried to upgrade, you would have a deadlock.
>
> But how is it possible? isn't the upgrade operation atomic?
> if the 2 threads try to upgrade, one will succeed and the other one will
> block until the first thread will unlock.
>

If it worked this way, it would mean that upgrade
lock would not exclude concurrent writes, which
completely defeats the point of using it in the
first place.

In Christ,
Steven Watanabe

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