88c7c8b8b7
Adds native (zero-CBOR) event support to the Rust generator, mirroring the cpp_native / Go event path: a per-event `add_<wire>_listener` registrar takes a closure, boxes it, and registers it through the bare `<lib>_add_event_listener` (native) entry point. The extern "C" trampoline reads the payload as the raw C-POD struct and hands the consumer a borrowed idiomatic value via from_c — no serialization on the hot path. The node owns the boxed closures in a Mutex<HashMap<id, Box<dyn Any>>> keyed by listener id so they outlive the call, and `remove_event_listener` drops them and calls the bare remove entry point. Event externs are only emitted when the library declares events, so event-free crates stay minimal. Verified end-to-end: the demo registers a listener, echo fires on_echo_fired inline, the typed EchoEvent reaches the closure, and removal returns true. 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