Always use atomics to get the shape count
When sharing between threads we need both atomic reads and writes. We probably didn't need to use this in some cases (where we weren't running in multi-ractor mode) but I think it's best to be consistent.
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Always use atomics to get the shape count
When sharing between threads we need both atomic reads and writes. We
probably didn't need to use this in some cases (where we weren't running
in multi-ractor mode) but I think it's best to be consistent.