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6bc626946e
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>
nim-ffi
Allows exposing Nim projects to other languages
Example
examples/timer is now a self-contained Nimble project that imports nim-ffi directly.
Use cd examples/timer && nimble install -y ../.. && nimble build to compile the example.