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bus

Crates.io Documentation Codecov

Bus provides a lock-free, bounded, single-producer, multi-consumer, broadcast channel.

NOTE: bus sometimes busy-waits in the current implementation, which may cause increased CPU usage โ€” see #23.

It uses a circular buffer and atomic instructions to implement a lock-free single-producer, multi-consumer channel. The interface is similar to that of the std::sync::mpsc channels, except that multiple consumers (readers of the channel) can be produced, whereas only a single sender can exist. Furthermore, in contrast to most multi-consumer FIFO queues, bus is broadcast; every send goes to every consumer.

I haven't seen this particular implementation in literature (some extra bookkeeping is necessary to allow multiple consumers), but a lot of related reading can be found in Ross Bencina's blog post "Some notes on lock-free and wait-free algorithms".

See the documentation for usage examples.

License

Licensed under either of

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Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

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