Is there a class which more directly represents "b...

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[bbaldino]

Is there a class which more directly represents "block until a condition is met" behavior? Or is the idea to just use CountdownLatch with a value of 1?

[Nir]

Can someone else signal when a change has been made which might cause the condition to have been met? (typical)

[Nir]

if so, this sounds like a condition variable

[Nir]

If not then i'm not sure how you can do better than polling (possibly though I'm completely misunderstanding)

[bbaldino]

Yeah I thought there was a ConditionVariable but I didn't see it...the result I saw was an Android thing

[bbaldino]

But that's the idea, yeah

[bbaldino]

So I was looking at wrapping a CountdownLatch with a value of 1 to act more like a conditionvariable, but it seems like there must be some existing class for that.

[bbaldino]

I do need to support the 'waiter' completing immediately if the condition is already met.

[Nir]

ah ok, not familiar with wha'ts available on android

[Nir]

just speaking from general multithreading knowledge

[bbaldino]

Sorry, to be clear I'm not on android

[bbaldino]

Ah, gotcha

[Nir]

ah, I see 🙂

[Nir]

Well, CV should support that, CV's should always support that

[Nir]

CV's typically have a wait call that supports a predicate; they check the predicate before sleeping

[bbaldino]

Ok, that wasn't my memory from posix-style CVs but it's been a while

[nanodeath]

CyclicBarrier might be helpful...

[Nir]

at a lower level, you might want to offer wait with no predicate, to more efficiently help construct more multi threading primitives

[bbaldino]

My use case is pretty simple, I think I'll go with CountdownLatch (or a simple wrapper which hard-codes the countdown value to 1) for now and see what needs come up in the future