📦 Start building wheels with free-threading

[webknjaz]

What do these changes do?

Fancy 3.13t stuff.

Are there changes in behavior for the user?

Being able to install from wheels under free-threaded Python builds.

Related issue number

N/A

Checklist

• I think the code is well written
• Unit tests for the changes exist
• Documentation reflects the changes

[webknjaz]

Looks like this needs an unreleased Cython version from Git.

[bdraco]

I think we need to wait for Cython 3.1+ to do this

https://docs.cython.org/en/latest/src/userguide/freethreading.html

[bdraco]

Looks like 3.1 is getting closer https://github.com/cython/cython/milestone/65

[isuruf]

Projects like numpy use a development version of cython to build wheels because the cython release might be far away.

[webknjaz]

This is fine, we're not in a hurry. It's always been like this.

[asvetlov]

The target cannot be solved by upgrading Cython version only.

IIRC the quoter uses pre-allocated memory buffer for small strings: https://github.com/aio-libs/yarl/blob/master/yarl/_quoting_c.pyx#L28

Now it's access is protected by GIL, gil-less solution requires some sort of explicit synchronization.