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GeezerVison is showing github.com — add free-threading support by kumaraditya303 · Pull Request #693 · MagicStack/uvloop

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@kumaraditya303

@kumaraditya303 kumaraditya303 commented Oct 11, 2025 •
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This adds free-threading support by adding freethreading_compatible=True in loop.pyx and also enables CI and wheels for 3.14t.

cc @fantix

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fantix and Vizonex reacted with heart emoji achimnol, Vizonex, Ahajha, doronz88, fukutu, and EDM115 reacted with eyes emoji
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@kumaraditya303
add free-threading support
2a6cd13
@kumaraditya303
kumaraditya303 force-pushed the master branch from 0060018 to 2a6cd13 Compare October 11, 2025 14:33
kumaraditya303
kumaraditya303 commented Oct 11, 2025
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Comment thread tests/test_tcp.py Resolved

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@kumaraditya303
kumaraditya303 force-pushed the master branch from 26da437 to 155374c Compare October 11, 2025 14:48
@kumaraditya303 kumaraditya303 mentioned this pull request Oct 11, 2025
uvloop 0.22.0 #692
Merged
@kumaraditya303
fix test
9168e62
@kumaraditya303
kumaraditya303 force-pushed the master branch from 155374c to 9168e62 Compare October 11, 2025 16:00
@Vizonex

Vizonex commented Oct 11, 2025

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Don’t mind by me asking but do you have the time to look into winloop as well? Or will I have to mirror everything and guess with blind faith?
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@achimnol

achimnol commented Oct 12, 2025

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👀 Also looking forward to MagicStack/asyncpg having free-threading support...
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@Vizonex

Vizonex commented Oct 12, 2025

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👀 Also looking forward to MagicStack/asyncpg having free-threading support...

Same
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@kumaraditya303

kumaraditya303 commented Oct 12, 2025

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Don’t mind by me asking but do you have the time to look into winloop as well? Or will I have to mirror everything and guess with blind faith?

There isn't anything to guess with blind faith here, you can follow the guide at https://py-free-threading.github.io/ci/ to add free-threading CI to projects you wish. I have never looked at winloop before so I'll not have time for that atm.
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@1st1

1st1 commented Oct 14, 2025

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Would be nice to add a test (should be possible with uv) that it does actually work cc @fantix
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@kumaraditya303

kumaraditya303 commented Oct 14, 2025

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Would be nice to add a test (should be possible with uv) that it does actually work cc

The existing tests pass on free-threading 3.14t CI which I added as part of this PR (the failing one test is a flaky test), do you want a test where uvloops are run in parallel threads?
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fantix
fantix approved these changes Oct 14, 2025
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@fantix
Add test
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@fantix

fantix commented Oct 14, 2025

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I added a race-condition test, which is confirmed to fail without freethreading_compatible=True. @1st1

Many thanks to @kumaraditya303 for putting this altogether!
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@fantix
Bump Cython version
0509ee4
@Vizonex Vizonex mentioned this pull request Oct 15, 2025
add 3.14 free-threading support Vizonex/Winloop#83
Merged
3 tasks done
@Vizonex

Vizonex commented Oct 15, 2025

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@kumaraditya303 I'm going to start mirroring these changes going on. No promises of when I'll finish unless It gets done in a rational amount of time. If needed I will open a uv virtual environment with the free-threading settings and version 3.14 set and testing locally.
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@Vizonex

Vizonex commented Oct 15, 2025 •
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Good News: I have successfully mirrored the changes from here, winloop 0.3.0 will release soon since I now obey how version numbers actually work and since the __init__.py script for winloop significantly changed. Thanks for your help again.

Bad News: uvloop also seems there's some rounding bugs with macos from the tests that I've seen I am also question why my library has the same problem. But maybe if we find a way to fix it I'll try doing the same with winloop's end. Rounding has always been a bit of a problem for a while (not sure why exactly).
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@fantix

fantix commented Oct 15, 2025

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Yeah, it's definitely getting more flaky to run tests, and there're a few warnings to take care of. Let's release for Python 3.14 first, and get back to those as follow-ups.
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@Vizonex

Vizonex commented Oct 15, 2025

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Yeah, it's definitely getting more flaky to run tests, and there're a few warnings to take care of. Let's release for Python 3.14 first, and get back to those as follow-ups.

Good idea.
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@fantix
fantix merged commit 286b370 into MagicStack:master Oct 15, 2025
fantix added a commit that referenced this pull request Oct 15, 2025
@fantix
uvloop 0.22.0
c660c77 
Changes
=======

* Fixes for Python 3.14 (#638)
  (by @graingert @hroncok @paulocheque @fantix in 46456b6 for #637)

* Add free-threading support (#693)
  (by @kumaraditya303 in 286b370 for #642)

Fixes
=====

* Use Cython `enum` for `__PREALLOCED_BUFS` (#634)
  (by @jakirkham in 7bb12a1 for #634)

* test: fix getaddrinfo test (#663)
  (by @fantix in 5680792 for #663)

* test: fix task name for Python 3.13.3/3.14 (#662)
  (by @cjwatson in 96b7ed3 for #662)
@fantix fantix mentioned this pull request Oct 15, 2025
Add support for free-threaded (nogil) 3.13 Python #642
Closed
fantix added a commit that referenced this pull request Oct 15, 2025
@fantix
uvloop 0.22.0
4106f7f 
Changes
=======

* Fixes for Python 3.14 (#638)
  (by @graingert @hroncok @paulocheque @fantix in 46456b6 for #637)

* Add free-threading support (#693)
  (by @kumaraditya303 in 286b370 for #642)

Fixes
=====

* Use Cython `enum` for `__PREALLOCED_BUFS` (#634)
  (by @jakirkham in 7bb12a1 for #634)

* test: fix getaddrinfo test (#663)
  (by @fantix in 5680792 for #663)

* test: fix task name for Python 3.13.3/3.14 (#662)
  (by @cjwatson in 96b7ed3 for #662)
@fantix fantix mentioned this pull request Oct 16, 2025
Upgraded Upload artifact to 4.6.2 #694
Closed
fantix added a commit that referenced this pull request Oct 16, 2025
@fantix
uvloop 0.22.0
5229115 
Changes
=======

* Fixes for Python 3.14 (#638)
  (by @graingert @hroncok @paulocheque @fantix in 46456b6 for #637)

* Add free-threading support (#693)
  (by @kumaraditya303 in 286b370 for #642)

Fixes
=====

* Use Cython `enum` for `__PREALLOCED_BUFS` (#634)
  (by @jakirkham in 7bb12a1 for #634)

* test: fix getaddrinfo test (#663)
  (by @fantix in 5680792 d9fa054 for #663)

* test: fix task name for Python 3.13.3/3.14 (#662)
  (by @cjwatson in 96b7ed3 for #662)
fantix added a commit that referenced this pull request Oct 16, 2025
@fantix
uvloop 0.22.0
3cf6b44 
Changes
=======

* Fixes for Python 3.14 (#638)
  (by @graingert @hroncok @paulocheque @fantix in 46456b6 for #637)

* Add free-threading support (#693)
  (by @kumaraditya303 in 286b370 for #642)

Fixes
=====

* Use Cython `enum` for `__PREALLOCED_BUFS` (#634)
  (by @jakirkham in 7bb12a1 for #634)

* test: fix getaddrinfo test (#663)
  (by @fantix in 5680792 d9fa054 for #663)

* test: fix task name for Python 3.13.3/3.14 (#662)
  (by @cjwatson in 96b7ed3 for #662)
@samypr100 samypr100 mentioned this pull request Apr 3, 2026
fix(build): use packaging instead of relying on pkg_resources from setuptools #742
Merged
@rgommers rgommers mentioned this pull request May 15, 2026
[Feature] Free-Threaded Python (3.14t / nogil) Support for SGLang sgl-project/sglang#22889
Open
@maartenbreddels maartenbreddels mentioned this pull request Nov 8, 2026
Segfault in call_soon_threadsafe() when another thread closes the loop (free-threaded Python) #788
Open
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5 participants

@kumaraditya303 @Vizonex @achimnol @1st1 @fantix
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