No std ThreadId

[Person-93]

Re-implement ThreadId using PyThread_get_thread_ident. This makes is usable in no_std context.

[clin1234]

lgtm

[davidhewitt]

Thanks, one comment on the FFI definition (see below).

Do you expect that the test suite (which does a lot of thread spawning) will need to change?

[Person-93]

Do you expect that the test suite (which does a lot of thread spawning) will need to change?

I don't think it will need to change, but it might be worth enabling it for wasm build and pulling in one of the wasm threading crates as a dev dependency.

[davidhewitt]

Thanks

[codspeed-hq]

Merging this PR will improve performance by 12.96%

⚡ 1 improved benchmark
✅ 125 untouched benchmarks

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
⚡	critical_section_creation	762.5 ns	675 ns	+12.96%

Tip

Curious why this is faster? Comment @codspeedbot explain why this is faster on this PR, or directly use the CodSpeed MCP with your agent.

---

_{Comparing Person-93:no_std_thread_id (def302d) with main (cd128ed)}

[clin1234]

@codspeedbot explain why this is faster

[Person-93]

Should we exclude PyPy from no_std support?