Feature Request: add API like addAndGet()

[jianzhongli]

Sometimes we would like to use MMKV as a multiprocess counter, it would be great if MMKV can add an API like addAndGet().

Is this feature on the roadmap? Or will you accept a PR for this?

[lingol]

If we are about to do it, we have to do it right. That means a complete set of atomic operations such as CAS, not just addAndGet().

[lingol]

And to your question, No, it's not on our roadmap.
PR is welcome. But it has to be feature complete regarding atomic operations.