![]() Both binding interfaces require unsafe code due to raw pointer use, but this can be contained within the interface functions. The two binding interfaces, C and JNI can be conditionally compiled depending on target architecture and share dispatch to a Rust API shared between them. There is however now mature support for exporting a JNI interface directly from a Rust library using the reliably named JNI crate. The painful way to do this was via traditional tooling like SWIG, on top of the C interface. Android / JNI interfaceĪs Android uses Java, you cannot directly call standard C ABI functions and must implement a JNI interface. The sn-bingen crate is at the time of writing the most well maintained tool for this. Rust has a built in way of declaring functions to be accessible via a C ABI, but it is convenient to use additional tooling to generate and maintain a header file automatically for use by swift and other potential consumers. ![]() For iOS, you will need a universal static library generated by the cargo-lipo tool. Usefully, this includes iOS and 64 bit android - 32 bit android can be a little more difficult due to some interesting design choices in its LibC design but it only a common target in embedded systems rather than handsets or tablets nowadays.įor Android, you will require a. Rust, as a system programming language has supported native targets for a bewildering number of chip sets and platforms. An architecture for native cross platform development In the end, almost everything in modern software will be able to call into a Rust library. Rust’s pros and cons as a general purpose or systems programming language are discussed at great length in other places, but any language that has a bidirectional, transparent C ABI is highly amenable to integration into other language ecosystems. Having this client functionality as a cross platform component that could also be tested on a non mobile platform independently of a user interface seemed to have a number of advantages, as did developing a client in the same language and ecosystem as our firmware - Rust. A memory efficient DOM, updated asynchronously as devices connected to the gateway changed stateĪ component this intricate would be difficult to both develop, test and maintain over the 3 required platforms.Real time messaging utilising operational transformations within 50ms time windows to combine outgoing commands and state changes into their simplest possible representations.Highly efficient binary protocol using Captain Protocol and shared dictionaries.TLS 1.3, as it solved security issues that made our local PKI much simpler, but was not yet available on mobile platforms. ![]()
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