Create platform-dependent locks

[pblazej]

Addresses lock-related concepts like:

• How can we use more recent APIs (without dynamic dispatch)
• How can we fix this kind of warning

[ilo-nanpa]

it seems like you haven't added any nanpa changeset files to this PR.

if this pull request includes changes to code, make sure to add a changeset, by writing a file to .nanpa/<unique-name>.kdl:

minor type="added" "Introduce frobnication algorithm"

refer to the manpage for more information.

[pblazej]

I think the idea is generally good, maybe would be nice to run another benchmark on our new (and concrete) implementation here.

[pblazej]

There's no clear performance winner here (iOS ⬅️ macOS ➡️), but I think it's still beneficial to fix the warning and consume future improvements in the newer APIs.

[hiroshihorie]

Nice. Even though there isn’t a significant gain at the moment, it’s good to transition to the safer locks.

[pblazej]

Nice. Even though there isn’t a significant gain at the moment, it’s good to transition to the safer locks.

👍 Haven't noticed any perf degradation with our new measurements 📐