[Futures-Util] Add monotonic_token and waiter_queue modules#4446
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AhmedSoliman wants to merge 2 commits intomainfrom
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[Futures-Util] Add monotonic_token and waiter_queue modules#4446AhmedSoliman wants to merge 2 commits intomainfrom
AhmedSoliman wants to merge 2 commits intomainfrom
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Test Results 7 files 7 suites 5m 42s ⏱️ Results for commit 7e9c487. ♻️ This comment has been updated with latest results. |
This was referenced Mar 4, 2026
Extract two generic, reusable utilities into restate-futures-util: **monotonic_token**: A lightweight mechanism for a producer to signal completion of a prefix of sequentially issued work items. Provides Token<T>, TokenOwner<T>, Tokens<T>, and TokenListener<T> types with a phantom type parameter to prevent mixing tokens from different domains. Uses atomics (Relaxed/Release/Acquire) for lock-free operation — no RwLock or watch overhead. **waiter_queue**: A priority-drainable queue (WaiterQueue<K, V>) designed for the common case where entries arrive in key-order. Uses an adaptive strategy: push_back for in-order inserts (O(1)), binary-search insert for out-of-order (rare). Drain is always a simple front-pop. Includes a Criterion benchmark comparing four strategies (naive, compact, adaptive, sorted-insert). Both modules include comprehensive documentation and tests. Neither references any specific use-case — they are general-purpose building blocks.
This was referenced Mar 9, 2026
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Extract two generic, reusable utilities into restate-futures-util:
monotonic_token: A lightweight mechanism for a producer to signal
completion of a prefix of sequentially issued work items. Provides
Token, TokenOwner, Tokens, and TokenListener types with
a phantom type parameter to prevent mixing tokens from different domains.
Uses atomics (Relaxed/Release/Acquire) for lock-free operation — no
RwLock or watch overhead.
waiter_queue: A priority-drainable queue (WaiterQueue<K, V>) designed
for the common case where entries arrive in key-order. Uses an adaptive
strategy: push_back for in-order inserts (O(1)), binary-search insert for
out-of-order (rare). Drain is always a simple front-pop. Includes a
Criterion benchmark comparing four strategies (naive, compact,
adaptive, sorted-insert).
Both modules include comprehensive documentation and tests. Neither
references any specific use-case — they are general-purpose building
blocks.
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