How to shut down LUA cleanly?

[Luke Kolin]

I have a LUA script for my aircraft that runs and handles custom actions for button presses. I've registered a shutdown handler to run when the sim shuts down, and it is being called correctly. The last three lines in the shutdown handler are as follows:

event.cancel("HandleShutdown")
ipc.log("TFDi MD-11 Button Handler shutdown (" .. btnCount .. " buttons, " .. updCount .. " LED updates)")
ipc.exit()

When P3Dv5 shuts down, the handler is called correctly, and I can see the last log line execute. However, in the log I see a 2150ms wait time, then the LUA thread gets killed. Should it not be dead already given the ipc.exit()?

Full FSUIPC log attached.

Cheers

 

FSUIPC6.log

[John Dowson]

An ipc.exit() call will not do anything when called in a shutdown handler as the thread is already exiting.
A shutdown handler is only needed to close any opened resources really - files, ports (com), pipes, etc. No need to cancel events.

John

[Luke Kolin]

That's helpful. Is this part of the log expected:

   662000 Lua threads being terminated:
   662000       1 = "D:\Program Files\FSUIPC6\tfdimd11.lua"
   662000 LUA: "D:\Program Files\FSUIPC6\tfdimd11.lua": killed

It feels like an unclean shutdown.

Cheers

[John Dowson]

31 minutes ago, Luke Kolin said:

It feels like an unclean shutdown.

It is expected (if the lua thread does not exit of its own accord in the required time limit) and it is forced / unclean shutdown, but nothing to worry about. You can try increasing the TimeForLuaClosing ini parameter, but this may not help either.
But it really is nothing to worry about. A lua termination handler should only be used to free any windows resources acquired.