Other threads can still hold a valid handle to the tsfn after
finalization if finalization was triggered by
- release with napi_tsfn_abort, or
- environment shutdown
Handle this by:
- protecting finalization itself with the mutex
- if necessary, delay deletion after finalization to when thread_count
drops to 0
- releasing all resources as soon as possible before deletion
Fixes: https://github.com/nodejs/node/issues/55706
PR-URL: https://github.com/nodejs/node/pull/55877
Co-Authored-By: Gabriel Schulhof <gabrielschulhof@gmail.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
