Why does FPlatformProcess::Sleep sleep all threads (including the game thread)? (FRunnable)

[Ivan3z]

I’m trying to create threads.
I actually think they are created correctly.

If I run them this way there is no problem, and I can see that the thread ids are different numbers.

	virtual uint32 Run() override
	{		
		if (Thread!=nullptr) 
        Message::Warning("ThreadID --> " 
        + FString::FromInt(Thread->GetThreadID()));	
		return 0;
	}

However when I run them this way the whole game freezes.

	virtual uint32 Run() override
	{		
		while (bRunThread)
		{
			FPlatformProcess::Sleep(1.0f);
		}		
		return 0;
	}

I think FPlatformProcess::Sleep is sleeping on the game thread too…

But in theory this should not happen. All the examples I have seen use FPlatformProcess::Sleep inside the Run() function.

Does anyone know what the problem could be?

Thank you so much!!

---

Has anyone had the same problem…
but I can’t find a solution on the forum

500×500 2.84 KB

Ok so here’s some more info to digest: First I changed the call to Run() to execute in the Tick() function. Then I put the first thread to sleep for 20 seconds. Lastly I used an AddOnScreenDebugMessage() to BeginPlay() Results: The whole game is paused until Sleep(20) has run it’s course. The debug message in BeginPlay() doesn’t display until the sleep has run it’s course and the threads are still running first to last.

[Ivan3z]

Ok… I got it

Most tutorials I’ve seen leave out the most important part. “How to run”
Why do you make a tutorial if it doesn’t show everything?

The Run() function is executed automatically.
Should not be run from the main thread.

Benui is the best…

FRunnable and Threads

Thank you very much Benui!!