Thread real time indicating

[javince80]

Hi everyone

I would like to have two (or more) threads (while or for loops), which changes a value, data, whatever in each etaration, and indicate that with an interface thread, which is independend from the others (so I have only one indicator for more threads). Something, like (just as a dummy example):
 

Is this possible, and if so, then how?

Thanks in advance.

[udka]

Check Synchronization Examples using Queues,Notifiers and rendezvous in Labview. Then you can get idea.

[javince80]

Thanks, but I already tried with a queue, like:

but the indicator thread waits until the worker thread finishes, and then shows the values.

[udka]

-I didn't understand which indicator you are talking about.
-You have given Queue length as 1, which means it can accomodate only one value in buffer.
-For second loop N, you ave 1, which means dequeue will be done for only once.
-And the Producer will be waiting forever, because the buffer is full and no one is removing the elements from queue.
-Please correct accordingly.

[javince80]

Yeah, I forgot to change it back to 5000 (N for the first loop), but it still doens't do what I want.

Now I have two threads. One is changing the value, the other one is showing, but after each other, not simultaniously. 

[udka]

Use rendezvous in that case.

[javince80 · Accepted solution]

Ok, this works now:

Thanks anyway.

[udka]

It might work now. But there is serious problem of race condition can happen with Local variables.
Please be aware of that.