napi acquire threadsafe function

NAPI_EXTERN napi_status
napi_acquire_threadsafe_function(napi_threadsafe_function func);

• [in] func: The asynchronous thread-safe JavaScript function to start making use of.

A thread should call this API before passing func to any other thread-safe function APIs to indicate that it will be making use of func. This prevents func from being destroyed when all other threads have stopped making use of it.

This API may be called from any thread which will start making use of func.