flutter_cpp_bridge 1.0.4

Bridge Flutter to C++ shared libraries via FFI. C++ owns all memory; Dart receives opaque message pointers with zero-copy, event-driven delivery.

1.0.4

• Guard against double-free: assignJob now asserts that no subscription is already registered on the same Service (a broadcast stream would deliver each pointer to every listener, causing each to call freeMessage — UB).
• Fix callback race on dispose: _setMessageCallback(nullptr) is called before _callable.close() so the C++ worker sees a null pointer before the NativeCallable is torn down.
• Fix notify_cb data race in ServiceBase: changed from a raw function pointer to std::atomic<void(*)()> with acquire/release ordering.
• Guard against NativeCallable leak when a subclass constructor throws after super(): a Finalizer is attached immediately after _callable is created and detached in both dispose() and the constructor catch block.
• Guard against partial construction: constructor wraps all FFI setup in try/catch; on failure sets _disposed = true, closes the stream controller, and rethrows so callers see the original error.
• Guard against double worker thread in ServicePool: addService now asserts that the service is not already in the pool.
• _setMessageCallback and _callable are now private to Service.
• service_helpers.h: Queue::release and CurrentValue::release guard against null pointer before dereferencing.

1.0.3

• Fix README image URLs to use absolute raw.githubusercontent.com paths so diagrams render correctly on pub.dev.

1.0.2

• Add byte-buffer service support via FCB_EXPORT_BYTES_SYMBOLS and fcb::BytesQueue, enabling zero-copy FlatBuffers / protobuf message delivery to Dart.
• Add ZMQ transport variant: C++ worker subscribes to a ZMQ PUB socket, dispatches messages with a switch-case, and forwards only the relevant payloads to the Dart queue.
• Add architecture and API diagrams to the documentation.
• Fix stale description in pubspec.yaml (removed reference to polling).

1.0.1

• Update README installation instructions now that the package is on pub.dev.
• Remove unused ffigen dev dependency.

1.0.0

• First stable release — event-driven delivery is now the default and only delivery mechanism. No breaking changes relative to 0.1.0.
• Published on pub.dev.

0.1.0

• Replace the Timer.periodic polling loop with an event-driven delivery mechanism using dart:ffi NativeCallable.listener. Zero CPU consumption at idle.
• Each service now requires a fifth mandatory C symbol, set_message_callback(void (*cb)()). The C++ worker calls cb immediately after pushing a message; Dart processes it on the event loop.
• ServicePool no longer owns a periodic timer. The poll interval parameter has been removed.
• Service.dispose() closes the NativeCallable and stops the service.

0.0.0

• Initial release.
• Service: base class to wrap a C++ shared library via dart:ffi. Binds four mandatory C functions (start_service, stop_service, get_next_message, free_message) and exposes a broadcast message stream.
• ServicePool: manages multiple services and polls them at a configurable interval (default 100 ms).
• StandaloneService: a Service subclass that starts immediately on construction and exposes a dispose() method.