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c90200de2b
Increment 2: wires the host-call machinery into the running FFI thread so a host answer (delivered from any thread) resolves the chronos Future an awaiting handler is blocked on. - FFICompletionQueue (ffi_host.nim): a GC-free intrusive queue. host_complete pushes c_malloc'd nodes from any thread; the FFI thread drains, copies the payload into GC memory, completes the future by token, and frees the node. - FFIContext gains hostRegistry / pendingTable / completionQueue, init'd and deinit'd alongside the event registry. - completeHostCall parks the answer and fires the EXISTING reqSignal — no second ThreadSignalPtr needed; the loop drains completions every iteration, on the loop thread (chronos single-thread invariant). - On shutdown the loop failAllPendings first, so a handler awaiting a host answer that never arrives can't hang the allFutures(pending) drain. 4 new queue unit tests (10 total) pass under orc+refc; the 19 ffi_context integration tests stay green. 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.