More lockfree structures

[Sudha247]

Below is a list of OCaml 5 lockfree data structures done by some awesome hackers. These were done either out of curiosity, or due to the needing them for applications. In any case, it would be nice to upstream these structures to lockfree. This would involve writing qcheck or alcotest, and dscheck tests for these structures. (@lyrm @bartoszmodelski feel free to add more details about upstreaming part).

Data Structure	Link
Concurrent Trie	https://github.com/ocaml-bench/sandmark/pull/181/files
MPSC Queue	https://github.com/haesbaert/ocaml-mpsc
MPMC Unbounded Queue	https://github.com/ocaml-multicore/lockfree/pull/35
Lockfree Stack	https://github.com/bartoszmodelski/ebsl/blob/main/datastructures/stack.ml
Paradict	https://github.com/ElectreAAS/Paradict
Lockfree sets and Maps	https://github.com/art-w/mcavl
List	https://github.com/ocaml-multicore/lockfree/blob/old/src/lf_list.ml
Bag	https://github.com/ocaml-multicore/lockfree/blob/old/src/lf_bag.ml
Containers Lock free Queue	https://github.com/c-cube/ocaml-containers/blob/wip-lfqueue/src/lf_queue/containers_lfqueue.ml#L3-L58
SkipMap	https://github.com/ocaml-multicore/dscheck/blob/skipmap/src/lf_skipmap.ml

[ElectreAAS]

You rang? -> #49 :)