[ISSUE #2087]🐛Fix ReferenceResource#hold not correct

[mxsm]

Which Issue(s) This PR Fixes(Closes)

Fixes #2087

Brief Description

How Did You Test This Change?

Summary by CodeRabbit

• Refactor
  • Updated atomic reference count operations to improve thread synchronization and consistency in the RocketMQ store implementation.

[coderabbitai]

Walkthrough

The pull request modifies the ReferenceResource struct's hold method in the default_mapped_file_impl.rs file. The primary change involves updating atomic operations for managing reference counts by switching from Ordering::Relaxed to Ordering::SeqCst (Sequentially Consistent) ordering. This modification aims to enhance thread synchronization and ensure more predictable visibility of reference count changes across different threads.

Changes

File	Change Summary
rocketmq-store/src/log_file/mapped_file/default_mapped_file_impl.rs	Updated atomic reference count operations from Relaxed to SeqCst ordering

Assessment against linked issues

Objective	Addressed	Explanation
Fix ReferenceResource#hold incorrect behavior [#2087]	✅

Suggested Labels

auto merge, ready to review, waiting-review, AI review first

Suggested Reviewers

• TeslaRustor
• SpaceXCN
• rocketmq-rust-bot

Poem

🐰 In the realm of threads, a change so bright,
Atomic orders now shine with might!
SeqCst replaces Relaxed with care,
Synchronization beyond compare!
Reference counts dance in perfect sync,
A rabbit's code that makes systems think! 🚀

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📜 Recent review details

Configuration used: .coderabbit.yaml
Review profile: CHILL
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📥 Commits

Reviewing files that changed from the base of the PR and between 2cd44af and 3506b60.

📒 Files selected for processing (1)

• rocketmq-store/src/log_file/mapped_file/default_mapped_file_impl.rs (1 hunks)

🔇 Additional comments (1)

rocketmq-store/src/log_file/mapped_file/default_mapped_file_impl.rs (1)

812-815: Ensure proper concurrency ordering

Switching to Ordering::SeqCst can improve data-race protection, but it may incur more performance overhead compared to AcqRel. If this level of synchronization is necessary, then this approach is correct for guaranteeing that all threads observe reference count updates consistently. Otherwise, consider using AcqRel or a combination of Acquire/Release for more nuanced performance. Also, double-check concurrency tests to confirm correctness across multi-threaded scenarios.

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[rocketmq-rust-bot]

🔊@mxsm 🚀Thanks for your contribution🎉！

💡CodeRabbit(AI) will review your code first🔥！

Note

🚨The code review suggestions from CodeRabbit are to be used as a reference only, and the PR submitter can decide whether to make changes based on their own judgment. Ultimately, the project management personnel will conduct the final code review💥.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 28.50%. Comparing base (2cd44af) to head (3506b60).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...c/log_file/mapped_file/default_mapped_file_impl.rs	0.00%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2088   +/-   ##
=======================================
  Coverage   28.50%   28.50%           
=======================================
  Files         492      492           
  Lines       69790    69790           
=======================================
  Hits        19896    19896           
  Misses      49894    49894           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[rocketmq-rust-bot]

LGTM