mirror of https://github.com/logos-messaging/nim-ffi.git synced 2026-06-21 00:40:16 +00:00

History

fix(codegen): emit 3-arg async destroy ABI in C++/Rust bindings

The recycle/async-destroy work changed the Nim `ffiDtor` export from
`int destroy(ctx)` to `int destroy(ctx, callback, userData)`, but the C++
and Rust generators still emitted the 1-arg signature. Foreign callers
therefore passed only `ctx`; inside Nim, `callback`/`userData` held
uninitialised register garbage. `requestRecycle` stored the garbage
callback and the recycle handler later invoked it — a jump through a wild
pointer that segfaulted in every C++ E2E / ASan / TSan job (the crash
surfaced at teardown, after each test's assertions had already passed).

Generate the 3-arg ABI and have the destructor/Drop block on the recycle
callback via the existing sync-call helper, so the pool slot is fully
drained and parked before the handle goes away — otherwise rapid
create/destroy churn (StressShortLivedPerThreadContext, ThreadedHammer)
could outrun the recycle and exhaust the pool.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

2026-06-12 16:12:33 +02:00

CMakeLists.txt

fix(ffi): set up foreign-thread GC in entry procs; recycle/event cleanup

2026-06-12 11:28:48 +02:00

main.cpp

Remove wildcard event listener; keep per-event dispatch (#70 )

2026-06-02 22:22:35 +02:00

my_timer.hpp

fix(codegen): emit 3-arg async destroy ABI in C++/Rust bindings

2026-06-12 16:12:33 +02:00

README.md

Add basic cpp e2e tests (#27 )

2026-05-19 12:43:34 +02:00

README.md

C++ Bindings for nim-timer

Purpose

This folder contains auto-generated C++ bindings for the my_timer Nim library. It is generated from ../timer.nim and provides:

my_timer.hpp: High-level C++ class (MyTimerCtx) wrapping the FFI interface
main.cpp: Example executable demonstrating how to use the bindings
CMakeLists.txt: Build configuration that compiles the Nim library and links the C++ example

How It's Generated

Generate or regenerate these bindings by running from the parent directory:

cd examples/timer
nimble genbindings_cpp

This command:

Invokes the Nim compiler with -d:targetLang:cpp flag
Triggers genBindings("examples/timer/cpp_bindings", "../timer.nim") in timer.nim
Creates/updates the generated binding files

Building the Example

cd examples/timer/cpp_bindings
cmake -S . -B build
cmake --build build
./build/example

Do Not Edit

The generated files in this folder are overwritten each time nimble genbindings_cpp runs. Any manual changes will be lost.