Introducing Safer FFI
Blog post from Ditto
Safer_ffi is a Rust framework developed to address the challenges faced by Ditto when building a cross-platform SDK using Rust while maintaining memory safety and readability. Initially, Ditto used a C-FFI layer to interact with higher-level languages like Swift, Java, and C#, but this approach led to the proliferation of unsafe code blocks, increasing the risk of memory-related bugs and complicating maintenance. Safer_ffi was created to reduce the reliance on unsafe code by providing a safer and more readable way to write foreign function interfaces. It significantly decreased Ditto's use of unsafe code blocks by 83% and improved the readability of function signatures, preserving Rust's ownership and borrowing semantics even in a C-compatible context. This framework allows for easier handling of complex data structures and return types between Rust and C, enhancing the overall development experience. By open-sourcing safer_ffi, Ditto aims to help other developers avoid similar pitfalls and streamline cross-language integration in their projects.
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