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Notes on Concurrency Bugs
A triple buffer is a good choice if all you want is polling the latest data at any given time, and you want to avoid mutexes altogether. If you want each piece of data to be delivered exactly once, you can use a queue (bounded or "unlimited" though the latter doesn't supply backpressure which I hear causes problems). SPSC lock-free bounded queues are dead simple to write, and can be tuned for higher throughput even with contention (https://github.com/rigtorp/SPSCQueue claims to be nice, and I haven't had issues working with it aside from having to peek and pop separately, but it's C++, and not a misuse-proof API since it doesn't use the "handles" idea I talked about, and you can push/read/pop from the wrong thread). If you want the reader to poll/WaitForMultipleObjects until the queue has items, that has to be done separately from the SPSC.
And mutexes make a lot of things easier... and introduces "oops wrong mutex!" (Rust solves it) and deadlock (Rust doesn't solve it).
Stats
Basic SPSCQueue.h repo stats
1
852
4.6
5 months ago
rigtorp/SPSCQueue is an open source project licensed under MIT License which is an OSI approved license.
The primary programming language of SPSCQueue.h is C++.
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