7a5ab67831
Aligns the Rust crate names with the C generator and the symbol naming: the native (zero-serialization, same-process) crate is the bare `<lib>` and the CBOR (inter-process) crate carries the `_cbor` suffix — mirroring `<lib>.h` / `<lib>_cbor.h` and the `<name>` / `<name>_cbor` exports. Previously the native crate was `<lib>_native` and the CBOR crate was the bare `<lib>`, which is backwards from the symbol convention. Only the Cargo package name changes; the linked dylib stays `lib<lib>.dylib` (the `#[link]` name and build.rs are untouched). Consumers updated: rust_client depends on `my_timer_cbor` and imports from it; the native demo imports from the bare `my_timer`. Validated: rust_client builds against the renamed CBOR crate; the native demo round-trips version / echo / event / complex / schedule against the bare crate; check_bindings_rust regen is deterministic. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
timer example
This example is a self-contained Nimble project demonstrating how to import nim-ffi and use the .ffiCtor. / .ffi. abstraction.
Two ABIs, one library
Every generated library exports two ABIs side by side, and you choose per call site:
| ABI | Header / symbols | Use it for |
|---|---|---|
| Native (pure C) | <lib>.h / <name> |
Same-process / local calls. Flat C structs by value, zero serialization. |
| CBOR | <lib>_cbor.h / <name>_cbor |
Inter-process communication only — a different process or machine, where the request must be serialized to cross the boundary. |
In a shared address space the CBOR round-trip is pure overhead, so default to the native ABI locally and reach for CBOR only when you actually cross a process/machine boundary (see ipc/). The per-language examples below: native C (c_bindings/), native Go (go_bindings/), native/CBOR C++ (cpp_bindings/), CBOR Rust (rust_client/), and CBOR-over-socket IPC (ipc/).
Usage
-
Change into the example directory:
cd examples/timer -
Install the local
ffidependency:nimble install -y ../.. -
Build the example library:
nimble build -
Generate bindings:
nimble genbindings_rust nimble genbindings_cpp
Rust example clients
The Rust client lives in examples/timer/rust_client.
-
Run the sync example:
cd examples/timer/rust_client cargo run --bin rust_client -
Run the Tokio example:
cd examples/timer/rust_client cargo run --bin tokio_client
C++ example
The generated C++ example lives in examples/timer/cpp_bindings.
Build and run it with:
cd examples/timer/cpp_bindings
cmake -S . -B build
cmake --build build
./build/example