rav1d

FYI to non-Rust devs wondering what's going on with this code: Those two abstractions (FFISafe and WithOffset) are not standard Rust abstractions. They're something the author is building within their own library: https://github.com/memorysafety/rav1d/blob/25e5574/src/ffi_s... So for all of the complaining about Rust abstractions and syntax in this thread, keep in mind that these particular abstractions that caused this problem are not standard. If you just want to call an extern "C" function you can do so directly in an unsafe block. The article should be read as the author debugging their Rust wrapper types, not as a generic article about calling C functions from Rust.

> if called from the non-abstract horror of a language C, and the (partial) fix for that is really ugly looking low-level Rust crap that that took a _long_ time to figure out and is the exact opposite of an abstraction, In case it's not clear, the FFISafe abstraction is not a Rust standard library feature. It's a wrapper type that the author created within their library to bypass some compiler warnings: https://github.com/memorysafety/rav1d/blob/25e5574/src/ffi_s... If you want to call C functions from Rust it's as simple as writing an extern block and then calling the function, though you'll have to put the call in an unsafe block because obviously the Rust compiler can't make safety guarantees across that boundary. The Rust docs for extern are concise: https://doc.rust-lang.org/std/keyword.extern.html