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feat(mpsc): prototype bounded permits with sequenced publication #291

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feat(mpsc): add bounded permits with sequenced publication
tisonkun Sep 8, 2026
22f6c6e
test(mpsc): benchmark reservations and inline bounded messages
tisonkun Sep 8, 2026
82d6992
chore: remove the unused internal atomic waker
tisonkun Sep 8, 2026
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4 changes: 4 additions & 0 deletions CHANGELOG.md
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Expand Up @@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.

## Unreleased

### New features

* Add bounded MPSC `reserve` and `try_reserve` methods returning a `Permit`, allowing callers to wait for capacity before constructing a message; unused permits release capacity without claiming message order.

### Bug fixes

* Release MPSC receiver wakers when the receiver is dropped, avoiding retained tasks and ownership cycles when a waker holds a sender.
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12 changes: 0 additions & 12 deletions LICENSE
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Expand Up @@ -377,18 +377,6 @@ the Apache-2.0 option for the incorporated portions.
Asyncband does not provide the upstream crate's synchronized receive
operations and simplifies the incorporated implementation accordingly.

Portions of asyncband/src/internal/atomic_waker.rs are derived from futures-rs
0.3.34 at the following exact revision and source path:

https://github.com/rust-lang/futures-rs/blob/705e6b5c0f06535b1aac1cb1989a172b3d45be8c/futures-core/src/task/__internal/atomic_waker.rs

futures-rs is licensed under Apache-2.0 or MIT. Apache Asyncband uses the
Apache-2.0 option for the incorporated portions. The upstream source carries
the following copyright notices:

Copyright (c) 2016 Alex Crichton
Copyright (c) 2017 The Tokio Authors

The polling loop in asyncband/src/blocking/executor.rs is adapted from Pollster
1.0.1 at the following exact revision and source path:

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