[fpc-pascal] Barriers semantics

[denisgolovan]

Hi all

Now we have "volatile" intrinsic for assignments in place, I'd like to ask for another clarification.
Documentation states we have following barriers - ReadBarrier, WriteBarrier, ReadDependencyBarrier, ReadWriteBarrier.

I'd like to get an idea how those related to more common / standard terms - Acquire/Release & their combinations?
Is it safe to assume that:

ReadBarrier - Acquire
WriteBarrier - Release
ReadWriteBarrier - Acquire+Release 
ReadDependencyBarrier - which one is that?

-- Regards,
Denis Golovan