is there a concurrent list/queue that can atomically return its content and clear itself afterwards ...

# announcements

[Nikky]

is there a concurrent list/queue that can atomically return its content and clear itself afterwards ?

[Arkadii Ivanov]

This should work, but might be not efficient: atomic<List<T>>(emptyList())

[Arkadii Ivanov]

Using e.g. atomicfu lib

[bbaldino]

I've used AtomicReference for this use case. Something like:

private val myList = AtomicReference<MutableList<String>>(mutableListOf())

fun addValue(value: String) {
    myList.get().add(value)
}

fun getAndClear(): List<String> {
    // Return the current list, and re-set it to an empty one
    return myList.getAndSet(mutableListOf())
}

[bbaldino]

(which may be the same thing @Arkadii Ivanov was suggesting, I'm not familiar with atomicfu)

[Arkadii Ivanov]

Exactly, atomicfu is a multiplatform implementation