Get the best of both worlds: Integrating Rust with other languages
summary
Integrates Rust with C, C++ and Java by exposing a BinaryHeap-backed priority queue over a C FFI (extern "C", no_mangle) and generating headers with cbindgen, using the Option<Box<usize> nullability trick for nullable pointers, mapping C++ via the cxx crate, and calling from Java via JNI plus the JNI + jni-fn macro to simplify signatures. Valgrind shows no leaks; example image filters measure big wins: grayscale ~18ms → ~8ms and blur ~85ms → ~33ms, and build scripts automate header and binding generation.
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chapters (15)
- 0:00Start
- 1:58Introduction
- 5:26Use a Rust library from C - Constructor
- 10:14cbindgen - Build script (build.rs)
- 11:21cbindgen - Generated header file
- 13:16C++ bindings using cxx - Declarations
- 14:48C++ bindings using cxx - Implementation
- 16:11Conclusion
- 16:52Code repo & presentation slides
- 18:03Java Native Interface (JNI)
- 18:20Native method declaration
- 22:02Implement the Rust side
- 28:15Load native Library
- 33:58Demo
- 40:56Filter Kernel
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