i was messing around with the `withTimeout` function and found that if I put a loop, it does not tri...

# coroutines

[WukongRework.exe]

i was messing around with the withTimeout function and found that if I put a loop, it does not trigger the timeout cancellation exception but if I use a delay statement for the same amount of time, then it triggers the catch block. Could anyone explain why?

Untitled

[jw]

Because the loop is just a CPU spin. You either need to use runInterrupt or whatever it's called or check isActive. Cancelation is cooperative.

[WukongRework.exe]

oh thats interesting, thanks!

[WukongRework.exe]

are there any alternatives to the runBlocking or checking isActive? because the code that I am trying to run inside the withTimeout is legacy code that is written in java

[Zach Klippenstein (he/him) [MOD]]

runInterrupting will send a Java thread interrupt to the thread if the coroutine is cancelled while it’s blocked. If your legacy code doesn’t support interrupts, or provide its own cancellation api, I think you’re out of luck.