Suriyakumarvijayanayagam 8c88aad06e Stopping the engine on Windows stops the whole engine ...

The installer runs the engine as <venv>\Scripts\python.exe, and since
Python 3.7.2 that file is a redirector that spawns the real interpreter
as a child. Stop() terminated the redirector and left the interpreter -
the process holding the cameras and the SQLite WAL - running with no
parent and nothing able to stop it. Seen on a Windows install: Quit from
the tray, and recognition still running.

The child is now started suspended, placed in a job object with
KILL_ON_JOB_CLOSE, and resumed. Cancel terminates the job, so the whole
tree goes; and the job dies with this process, so it goes even if the app
crashes. CREATE_NO_WINDOW while here: python.exe is a console program
and a GUI parent otherwise opens a black console on the shop counter.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KGcjxF1cNLcuwc3DAPcnfj

2026-09-18 11:06:49 +05:30

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