Are concurrent read/writes to UnsafeCell possible?

[LtdJorge]

I'm implementing a SeqLock and the underlying data is behind an UnsafeCell. Concurrent readers with a single writer are required, since the readers will check on an atomic value after reading to see if the data was written to by the reader while they were reading, and discard the data in that case.

There can only be one writer though, multiple concurrent writers should still fail the test. However, for now I'm having to use a standard UnsafeCell because this use case is not supported in Loom. Would something like this be possible to implement in Loom?

[mox692]

I don't think there's a way to do that. You'll need to avoid data races explicitly.