[Closed] Running a fn inside a Struct in another Thread?

Hi there everyone,

I’m having problems with dotNET and multi threading (BackgroundWorker) inside a Struct.

I’m trying to create a general purpose Struct with various methods etc… to use in my workflow. I started with a method I need now, that takes a current maxFile and packs it externally in WinRAR via the Process class. I wanted to make this operation run in another thread so that I can still use Max while the process is being executed (packing certain large files takes time), however, I bumped into a problem I don’t really know how to deal with.

Here’s a snippet of the struct:

struct duberOps
(
	duberPath = @"C:\duber",
	sysPath = dotNetClass "System.IO.Path",
	process = dotNetClass "System.Diagnostics.Process",
	startInfo = dotNetClass "System.Diagnostics.ProcessStartInfo",
	MainThread = dotnetobject "CSharpUtilities.SynchronizingBackgroundWorker",
	
	fn runWinRARInBG sender ev =
	(
		for i = 1 to 10 do print ( "iter: " + (i as string) + " it works!" )
		return "SOMETHING"
	),
	
	fn compressCurrentSceneFile method:#rar =
	(
		-- the path to the rar.exe file
		local archiverPath = this.sysPath.Combine this.duberPath @"WinRAR\4.01_x64\Rar.exe"
		local process = dotNetObject this.process
		local startInfo = dotNetObject this.startInfo
		
		-- multithreading support
		this.MainThread.WorkerSupportsCancellation = true
		this.MainThread.WorkerReportsProgress = true
		dotNet.addEventHandler this.MainThread "DoWork" this.runWinRARInBG
		if this.MainThread.IsBusy do this.MainThread.CancelAsync()
		
		-- check whether the current file is saved to disk
		if maxFileName != "" or maxFilePath != "" do
		(
			local completeFileName = this.sysPath.Combine maxFilePath maxFileName
			if not this.MainThread.IsBusy do this.MainThread.RunWorkerAsync()
		)
	)	
)

duberOps = duberOps()

As you can see, I’m using a similar approach to Lonerobot’s multithreading example. But, when executing the duberOps.compressCurrentSceneFile() function that should trigger the runWinRARInBG() function in another thread via the dotnetobject “CSharpUtilities.SynchronizingBackgroundWorker” object, it only returns undefined. That’s it.

But when I add the dotNet eventHandler to a globally declared function outside that Struct, it runs it without problems.

Am I missing something here? Why isn’t the backgroundWorker triggering the function inside the same struct?

Thanks a lot for any tips in advance!