The C libffi library provides two main facilities: assembling calls to functions dynamically, and creating closures that can be called as ordinary C functions. This is an undocumented wrapper, generated by bindgen, intended as the basis for higher-level bindings, but you can see the C libffi documentation.
See the libffi crate for a higher-level API.
It’s on crates.io, so it can be
used by adding libffi-sys to the dependencies in your project’s
Cargo.toml:
toml
[dependencies]
libffi-sys = "0.2"
It is necessary to have C libffi installed first. (We’ve tested with libffi version 3.2.1.)