[ISSUE #1872]⚡️Optimize RunningFlags logic and add doc #1873
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Actionable comments posted: 0
🧹 Nitpick comments (4)
rocketmq-store/src/store/running_flags.rs (4)
20-28: Clarify the choice of i32 for bit flags.
The constants are now i32, which works but may be slightly confusing since bit flags are typically unsigned. Ensure that using signed values is intentional and does not cause unexpected behavior when combining flags.
29-32: Struct doc explanation is helpful.
Storing flags in an AtomicI32 is straightforward, but consider adding a comment clarifying the rationale for using i32 over u32 to avoid confusion.
49-51: Consistent memory ordering on load.
Using SeqCst ensures the strongest memory ordering. This is correct, though potentially more expensive; consider Acquire for loads if performance is critical and no release semantics are needed in the read path.
102-111: Combining multiple bits for is_writeable check.
Excluding all error bits ensures the state is fully writeable. The logic is correct, but consider a descriptive comment summarizing the condition for future maintainers.
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rocketmq-store/src/store/running_flags.rs(1 hunks)
🔇 Additional comments (19)
rocketmq-store/src/store/running_flags.rs (19)
17-17: Question about signed vs. unsigned flags.
Switching from AtomicU32 to AtomicI32 introduces the possibility of negative values. If negative sign bits are never used for these flags, consider whether an unsigned integer would more intuitively represent bit flags.
42-45: Initialization with zero preserves all flags as “off.”
The default constructor properly sets the atomic bits to 0, ensuring flags begin in a neutral state.
54-60: Atomic operations use bitwise AND with a negated flag.
This effectively clears the NOT_READABLE_BIT. Perfect for toggling flags. Implementation looks correct.
65-67: Simple bitwise check for readability.
Your check correctly ensures that NOT_READABLE_BIT is not set. Code is concise and correct.
70-72: Fenced flag check is consistent with usage.
Uses the same bitwise pattern. Matches other checks throughout the file.
75-80: Conditional toggle to make state not readable.
fetch_or is used to set the NOT_READABLE_BIT. Implementation is aligned with naming.
85-88: Clearing the write logics queue error flag.
Bitwise AND with the negated flag is a standard approach. This is safe and correct.
91-97: Conditional toggle to make state writeable.
Clearing the NOT_WRITEABLE_BIT is symmetrical to the make_readable logic. Implementation is valid.
114-122: is_cq_writeable skip the DISK_FULL_BIT.
The partial set of flags makes sense for checking only the consume queue. Implementation is consistent with the doc comment.
125-130: Toggle to make state not writeable.
fetch_or sets the NOT_WRITEABLE_BIT. Matches the design pattern used for readability toggling.
135-138: Setting the logics queue error bit.
Straightforward fetch_or usage. Matches your approach in clearing the bit.
141-146: Controlled fenced flag updates.
Using fetch_or or fetch_and is properly toggling the bit. Good approach for a binary fence state.
150-153: Checking logics queue error bit.
Matches the other “is_*” pattern. Implementation is consistent.
156-159: Setting index file error flag.
fetch_or is the correct choice for turning on an error condition bit. Straightforward.
162-165: Verifying index file error state.
This matches the same “is_*” pattern. Code is consistent.
168-171: Disk full toggling.
fetch_or is used for setting disk full. The returned boolean logic correctly indicates the previous state to the caller.
175-179: Disk OK toggling.
Bitwise negation of DISK_FULL_BIT ensures clearing that flag. Logic is consistent with the naming.
182-187: Toggle logic disk full.
Identical approach to the standard disk full logic. Returned boolean is correct.
191-197: Toggle logic disk OK.
Bitwise AND with the negated LOGIC_DISK_FULL_BIT is correct. Consistency remains strong throughout.
Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## main #1873 +/- ##
==========================================
+ Coverage 28.47% 28.49% +0.01%
==========================================
Files 475 475
Lines 66798 66809 +11
==========================================
+ Hits 19024 19035 +11
Misses 47774 47774 ☔ View full report in Codecov by Sentry. |
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Which Issue(s) This PR Fixes(Closes)
Fixes #1872
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New Features
Bug Fixes