On Tue, 12 Feb 2019, Alexey Kardashevskiy wrote:

> Now it is 3 independent accesses (actually 4 but the last one is
> diagnostic) with no locking around them. Why do not we need a lock
> anymore precisely? Thanks,

Updating a regular counter is racy and requires a lock. It was converted
to be an atomic which can be incremented without a race.

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