Implementation of threadsafe functions

[paradowstack]

This pull request introduces a complete implementation of Node-API's thread-safe function support for the host runtime, including its registration, lifecycle management, and queueing semantics.

Thread-safe function implementation:

• Implemented all core threadsafe related Node-API functions (napi_create_threadsafe_function, napi_call_threadsafe_function, napi_acquire_threadsafe_function, napi_release_threadsafe_function, napi_unref_threadsafe_function, napi_ref_threadsafe_function, napi_get_threadsafe_function_context) in RuntimeNodeApiAsync.cpp
• Added a new ThreadSafeFunction class , providing a full implementation of Node-API's thread-safe function, including queueing, reference management, context retrieval, and finalization logic. This includes a global registry for safe handle management.

Testing and examples:

• Adopted node.js test

[Copilot]

Pull Request Overview

This pull request implements complete thread-safe function support for Node-API, enabling cross-thread communication between native code and JavaScript. The implementation provides all core Node-API threadsafe functions with proper lifecycle management, queueing semantics, and reference counting.

Key changes:

• Added ThreadSafeFunction class with full Node-API compatibility including creation, calling, acquire/release, and ref/unref operations
• Implemented all seven Node-API threadsafe functions in RuntimeNodeApiAsync.cpp with proper error handling and state management
• Added comprehensive test suite based on Node.js official tests to validate functionality across different threading scenarios

Reviewed Changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
packages/host/cpp/ThreadsafeFunction.hpp	Header defining the ThreadSafeFunction class with thread-safe queue management and lifecycle controls
packages/host/cpp/ThreadsafeFunction.cpp	Complete implementation of thread-safe function with global registry, queueing, and finalization logic
packages/host/cpp/RuntimeNodeApiAsync.cpp	Node-API function implementations delegating to ThreadSafeFunction class methods
packages/host/scripts/generate-weak-node-api-injector.ts	Added threadsafe function names to implemented functions list
packages/node-addon-examples/tests/threadsafe_function/*	Test suite files including C++ addon and JavaScript test harness
packages/host/android/CMakeLists.txt	Build configuration updates to include new ThreadsafeFunction source files

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