python-trio / python-trio/trio
Consider supporting POSIX aio for disk I/O (mostly useful for FreeBSD)
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- Python
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Description
Since trio seems to be growing support for the Linux specific io_uring including its async disk I/O features, what about POSIX aio support?
To might knowledge only FreeBSD (and possibly NetBSD) implements this in a useful, in kernel manner. Otherwise its usually user space threads managed by the systems C library, which is probably not much better than the current implementation.
If started on CFFI bindings at /wagnerflo/aiosix including an example how to use this with kqueue. Other operating systems would need to use other sigevent request completion notification mechanism (SIGEV_SIGNAL with a self-pipe or signalfd probably).
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reading the referenced aiosix CFFI bindings and its example.py, especially the kqueue-based completion flow. Then compare that approach with Trio's existing io_uring support and identify the platform-specific entry points and tests needed; the issue does not name Trio files or define a completion criterion.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- backend, operating-systems
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 20/100