Skip to content

Impl Drop for PyAtomicRef #5970

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom
Merged
merged 1 commit into from
Jul 14, 2025
Merged

Impl Drop for PyAtomicRef #5970

merged 1 commit into from
Jul 14, 2025

Conversation

youknowone
Copy link
Member

@youknowone youknowone commented Jul 14, 2025 •
edited by coderabbitai bot
Loading

@qingshi163 basically everything is PyObjectRef. So this will be fine, right?

Summary by CodeRabbit

  • Bug Fixes
    • Improved memory management to ensure that Python object references are safely released when no longer needed, reducing the risk of resource leaks.

@youknowone youknowone requested a review from qingshi163 July 14, 2025 10:55
@coderabbitai coderabbitai
Copy link
Contributor

coderabbitai bot commented Jul 14, 2025 •
edited
Loading

Caution

Review failed

The pull request is closed.

Walkthrough

A Drop trait implementation was introduced for the generic struct PyAtomicRef<T>. The new drop method ensures that when a PyAtomicRef instance is dropped, its internal atomic pointer is safely swapped out and the referenced Python object is properly released.

Changes

File(s) Change Summary
vm/src/object/ext.rs Added Drop trait implementation for PyAtomicRef<T>.

Poem

When PyAtomicRef hops away,
It drops its pointer, clears the way.
With a gentle swap and careful touch,
Python objects thank it much!
In memory meadows, clean and bright,
Rusty rabbits sleep at night. 🐇✨

📜 Recent review details

Configuration used: .coderabbit.yml
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 1e23d9a and ef1d292.

📒 Files selected for processing (1)
  • vm/src/object/ext.rs (1 hunks)
✨ Finishing Touches
  • 📝 Generate Docstrings

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share
🪧 Tips

Chat

There are 3 ways to chat with CodeRabbit:

  • Review comments: Directly reply to a review comment made by CodeRabbit. Example:
    • I pushed a fix in commit <commit_id>, please review it.
    • Explain this complex logic.
    • Open a follow-up GitHub issue for this discussion.
  • Files and specific lines of code (under the "Files changed" tab): Tag @coderabbitai in a new review comment at the desired location with your query. Examples:
    • @coderabbitai explain this code block.
    • @coderabbitai modularize this function.
  • PR comments: Tag @coderabbitai in a new PR comment to ask questions about the PR branch. For the best results, please provide a very specific query, as very limited context is provided in this mode. Examples:
    • @coderabbitai gather interesting stats about this repository and render them as a table. Additionally, render a pie chart showing the language distribution in the codebase.
    • @coderabbitai read src/utils.ts and explain its main purpose.
    • @coderabbitai read the files in the src/scheduler package and generate a class diagram using mermaid and a README in the markdown format.
    • @coderabbitai help me debug CodeRabbit configuration file.

Support

Need help? Create a ticket on our support page for assistance with any issues or questions.

Note: Be mindful of the bot's finite context window. It's strongly recommended to break down tasks such as reading entire modules into smaller chunks. For a focused discussion, use review comments to chat about specific files and their changes, instead of using the PR comments.

CodeRabbit Commands (Invoked using PR comments)

  • @coderabbitai pause to pause the reviews on a PR.
  • @coderabbitai resume to resume the paused reviews.
  • @coderabbitai review to trigger an incremental review. This is useful when automatic reviews are disabled for the repository.
  • @coderabbitai full review to do a full review from scratch and review all the files again.
  • @coderabbitai summary to regenerate the summary of the PR.
  • @coderabbitai generate docstrings to generate docstrings for this PR.
  • @coderabbitai generate sequence diagram to generate a sequence diagram of the changes in this PR.
  • @coderabbitai resolve resolve all the CodeRabbit review comments.
  • @coderabbitai configuration to show the current CodeRabbit configuration for the repository.
  • @coderabbitai help to get help.

Other keywords and placeholders

  • Add @coderabbitai ignore anywhere in the PR description to prevent this PR from being reviewed.
  • Add @coderabbitai summary to generate the high-level summary at a specific location in the PR description.
  • Add @coderabbitai anywhere in the PR title to generate the title automatically.

Documentation and Community

  • Visit our Documentation for detailed information on how to use CodeRabbit.
  • Join our Discord Community to get help, request features, and share feedback.
  • Follow us on X/Twitter for updates and announcements.

coderabbitai[bot]
coderabbitai bot reviewed Jul 14, 2025
View reviewed changes
Copy link
Contributor

@coderabbitai coderabbitai bot left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Actionable comments posted: 0

🧹 Nitpick comments (1)
vm/src/object/ext.rs (1)

248-259: Consider using stronger memory ordering for consistency and safety.

The Drop implementation looks correct for preventing memory leaks, but there are a couple of considerations:

  1. Memory ordering: You're using Ordering::Relaxed for the swap operation, but all other swap methods in this file use Ordering::AcqRel (lines 319, 360, 405, 451). For consistency and to ensure proper synchronization in multi-threaded scenarios, consider using AcqRel ordering.

  2. Import consistency: Use the imported null_mut from line 20 instead of std::ptr::null_mut().

Apply this diff to address the concerns:

-            let ptr = self.inner.swap(std::ptr::null_mut(), Ordering::Relaxed);
+            let ptr = self.inner.swap(null_mut(), Ordering::AcqRel);
📜 Review details

Configuration used: .coderabbit.yml
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between eef8890 and dd09503.

📒 Files selected for processing (1)
  • vm/src/object/ext.rs (1 hunks)
🧰 Additional context used
📓 Path-based instructions (1)
**/*.rs

Instructions used from:

Sources:
📄 CodeRabbit Inference Engine

  • .github/copilot-instructions.md
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (9)
  • GitHub Check: Check the WASM package and demo
  • GitHub Check: Run snippets and cpython tests on wasm-wasi
  • GitHub Check: Run snippets and cpython tests (windows-latest)
  • GitHub Check: Run snippets and cpython tests (ubuntu-latest)
  • GitHub Check: Run snippets and cpython tests (macos-latest)
  • GitHub Check: Run tests under miri
  • GitHub Check: Check Rust code with rustfmt and clippy
  • GitHub Check: Run rust tests (windows-latest)
  • GitHub Check: Ensure compilation on various targets

@youknowone
Copy link
Member Author

#5968 is calling Drop, and it looks fine!

@youknowone youknowone merged commit fd35c7a into RustPython:main Jul 14, 2025
11 of 12 checks passed
@youknowone youknowone deleted the drop-atomic-ref branch July 14, 2025 13:54
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Reviewers

@coderabbitai coderabbitai[bot] coderabbitai[bot] left review comments

@qingshi163 qingshi163 Awaiting requested review from qingshi163

Assignees
No one assigned
Labels
None yet
Projects
None yet
Milestone
No milestone
Development

Successfully merging this pull request may close these issues.
1 participant
@youknowone
pFad - Phonifier reborn

Pfad - The Proxy pFad of © 2024 Garber Painting. All rights reserved.

Note: This service is not intended for secure transactions such as banking, social media, email, or purchasing. Use at your own risk. We assume no liability whatsoever for broken pages.


Alternative Proxies:

Alternative Proxy

pFad Proxy

pFad v3 Proxy

pFad v4 Proxy