Remove (implicit) T: Sized bound from Arc
#226
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WaffleLapkin
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Sorry this took so long to review --- this seems like a reasonable approach! @WaffleLapkin are you interested in continuing to work on this? |
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Yes, I'm still interested! |
This function allows creating `Arc<T>` where `T: !Sized` by unsizing the std's `Arc` first.
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(remove them from the global map on drop of the last `Arc`)
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@hawkw I believe this is ready for review |
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(@hawkw friendly ping) |
hawkw
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Jan 27, 2022
Co-authored-by: Eliza Weisman <eliza@buoyant.io>
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@hawkw what is left for this PR? |
hawkw
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Apr 20, 2022
src/sync/arc.rs
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| /// use loom::sync::Arc; | ||
| /// | ||
| /// # loom::model::model(|| { | ||
| /// // std's arc can be automatically coerced |
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nit: maybe
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| /// // std's arc can be automatically coerced | |
| /// // std's arc can be automatically coerced from a `!Sized` value |
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That's not really correct though, the coercion goes Arc<[u8; 3]> -> Arc<[u8]>, so it is not "from a !Sized value" but more like "to a !Sized value"?
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ah, okay, "to" would also be fine, i just thought it was nice if the comment explicitly stated the coercion that was happening. not a big deal!
src/sync/arc.rs
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| /// # loom::model::model(|| { | ||
| /// // std's arc can be automatically coerced | ||
| /// let std = std::sync::Arc::new([1, 2, 3]); | ||
| /// let loom: Arc<[u8]> = Arc::from_std(std); | ||
| /// | ||
| /// let std = std::sync::Arc::new([1, 2, 3]); | ||
| /// let loom: Arc<dyn Sync + Send> = Arc::from_std(std); | ||
| /// # }); |
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a very minor docs suggestion, take it or leave it: it could also be nice to have a compile_fail example showing how loom::sync::Arc::new cannot be used with !Sized values directly, so that users can see why this function is necessary? not a blocker.
Co-authored-by: Eliza Weisman <eliza@buoyant.io>
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@hawkw I believe I've addressed your nitpicks :) |
hawkw
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Apr 23, 2022
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Yay! 🎉 |
This was referenced Apr 24, 2022
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May 10, 2022
# 0.5.5 (May 10, 2022) ### Added - sync: Add `Arc::from_std` without `T: Sized` bound (#226) - sync: Implement `Debug` for `AtomicPtr` for all `T` (#255) - logs: Add location tracking for threads and atomic operations (#258) - logs: Add additional location tracking to `Arc`, `alloc`, and `mpsc` (#265) - logs: Improve `tracing` configuration for `LOOM_LOG` (#266) - logs: Add a span for the current model's iteration (#267) ### Documented - Add note about in-memory representation of atomic types (#253) - Document `LOOM_LOG` syntax (#257) ### Fixed - Fix double panic when exceeding the branch limit in `Drop` (#245) - cell: Allow using `{Mut,Const}Ptr::{deref,with}` when the pointee is `!Sized` (#247) - thread: Fix semantics of `thread::park` after `Thread::unpark` (#250)
hawkw
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May 13, 2022
# 0.5.5 (May 10, 2022) ### Added - sync: Add `Arc::from_std` without `T: Sized` bound (#226) - sync: Implement `Debug` for `AtomicPtr` for all `T` (#255) - logs: Add location tracking for threads and atomic operations (#258) - logs: Add additional location tracking to `Arc`, `alloc`, and `mpsc` (#265) - logs: Improve `tracing` configuration for `LOOM_LOG` (#266) - logs: Add a span for the current model's iteration (#267) ### Documented - Add note about in-memory representation of atomic types (#253) - Document `LOOM_LOG` syntax (#257) ### Fixed - Fix double panic when exceeding the branch limit in `Drop` (#245) - cell: Allow using `{Mut,Const}Ptr::{deref,with}` when the pointee is `!Sized` (#247) - thread: Fix semantics of `thread::park` after `Thread::unpark` (#250)
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This is an attempt to resolve #85