Shared mutable state in Rust (2022)
by vinhnx on 4/1/2026, 11:33:41 PM
https://draft.ryhl.io/blog/shared-mutable-state/
Comments
by: the__alchemist
I think which tools you use for concurrency depends on your code style and what you're doing. For example, I haven't reached for Arc in a while. Example of the two primary ways I've been doing it:<p>Embedded: Mutex + critical sections + hardware interrupts. The Mutex isn't std::Mutex, but a hardware-specific one. (E.g. ARM) works in a similar way. The default syntax is a mess of RefCell, Cell, Option, with the requisite < and > characters. (The Option is so you can insert a value in on init, then it's never None) etc. I work around this with macros.<p>PC applications (GUI, 3D etc): std::thread and MPSC receivers/transmitters which update a state struct when they're ready. Then poll in the GUI's event loop or w/e. I believe this workflow has worked for me in lieu of Arc because I have been structuring programs with a single main thread, then sub threads which perform non-blocking tasks, then return data to the main thread.<p>Also: If it's a primitive type, Atomics are nice.
4/5/2026, 3:21:58 PM
by:
4/5/2026, 2:41:45 PM
by: FpUser
I have shared mutable state which is available through the whole application lifetime. Having ARC in this situation makes no sense, single mutex should be all I need.
4/5/2026, 12:44:16 PM