[llvm] [Support/rpmalloc] Updated fake atomics with Interlocked functions (PR #148303)

[Dmitry Vasilyev via llvm-commits]

slydiman wrote:

All `Atomic access abstraction` related code has been removed from the upstream rpmalloc 2 years ago.
The initial rpmalloc code in LLVM (since 2024) contained `Atomic access abstraction`.
So these implementations were out of sync from the beginning.

> Send a PR with your changes to https://github.com/mjansson/rpmalloc/pulls
> Once that is approved and merged, we integrate the latest rpmalloc in LLVM.
> Are you able to do that first step?

I will not send a PR to https://github.com/mjansson/rpmalloc because it means reverting 2 years of work. And such PR will never be approved.


https://github.com/llvm/llvm-project/pull/148303