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# Objective - Safety comments for the `CommandQueue` type are quite sparse and very imprecise. Sometimes, they are right for the wrong reasons or use circular reasoning. ## Solution - Document previously-implicit safety invariants. - Rewrite safety comments to actually reflect the specific invariants of each operation. - Use `OwningPtr` instead of raw pointers, to encode an invariant in the type system instead of via comments. - Use typed pointer methods when possible to increase reliability. --- ## Changelog + Added the function `OwningPtr::read_unaligned`. |
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bevy_ptr
The bevy_ptr crate provides low-level abstractions for working with pointers in a more safe way than using rust's raw pointers.
Rust has lifetimed and typed references (&'a T), unlifetimed and typed references (*const T), but no lifetimed but untyped references.
bevy_ptr adds them, called Ptr<'a>, PtrMut<'a> and OwningPtr<'a>.
These types are lifetime-checked so can never lead to problems like use-after-frees and must always point to valid data.