Module show_notes::e031

FFI Deep Dive

• Date: May 11, 2019
• Subject: Exposing Rust types and functions to C API consumers.
• download mp3
• script

Modules

• unions
  Demonstrate unions! Combines an enum and a union into a struct that acts mostly like a regular Rust enum.

Structs

• OpaquePoint
  A struct identical to Point, but which is not #[repr(C)]!
• Point
  A simple struct which we can expose to a C API. Note that it is #[repr(C)]!
• Script
  e031: FFI Deep Dive!

Functions

• add_in_rust
  The simplest possible example of exposing Rust functions via a C FFI.
• concat_strings^⚠
  Take two strings in and concatentate them without mutating either.
• free_rust_string^⚠
  Free any string allocated by Rust.
• opaque_point_describe^⚠
  Safety
• opaque_point_free^⚠
  Safely drops the OpaquePoint instance.
• opaque_point_new
• opaque_point_translate^⚠
  Expose an interface for C API callers to call the OpaquePoint impl.
• point_translate^⚠
  Expose an interface for C API callers to call the Point impl.