spawn loops at runtime

[pgraebel]

Hi,

I want to program a timed loop that spawns new parallel processes (e. g. while loops) at specific points in time. It's kind of a C++ loop that dynamically creates thread objects at certain interation points and calls the thread member function start() immediately. The loop can continue iteration after spawning a thread, regardless of the threads runtime.

At the moment placing a number of LabView while loops that are waiting for a start signal (via notifier or queue) from a main loop is the best way I can think of. But this approach is fixed in number.

Is there something I can do via VI references?

[GerdW]

Hi pgraebel,

"Is there something I can do via VI references?"

Well you could use VI templates with your while loop and start them via VI server method calls...

[pgraebel]

I found a forum thread that discusses a similar topic: Link

They open a VI reference (which I want to do anyway) and they call the VI via a method node "Run VI", where a "wait until done" flag is available.

But how do I specify input values for the VI?

[SteveChandler]

You might be able to leverage these techniques.

[SteveChandler]

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@pgraebel wrote:

But how do I specify input values for the VI?

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Use the Set Control Value method.

[pgraebel]

I managed it to open and call two instances of the same VI (CallMe.vi). These two instances get different input values (Wait Time). The CallMe.vi block diagram shows a double run arrow instead of a simple white arrow and both CallMe.vi instances terminate at different times according to their different Wait Time input values. I had to check "invariant execution" in the CallMe.vi VI settings.

Is this a or the correct way to dynamically call different instances of the same VI or various VIs without having to wait for their termination?