Is there a way to implement the Cleaner with primitives other than boxing them in classes?

Asked Apr 24 '19 at 15:09

Active Apr 24 '19 at 15:09

Viewed 36 times

So, we have a kotlin wrapper around vulkan which relies on inline classes for vulkan identifiers (which are usually Longs)

As far as I got, Java (9+) Cleaner is supposed to work only with classes.

Here an example

I tried to modify that in order to run with plain primitives

fun main() {
    val cleaner = Cleaner.create()
    for (i in 0..9) {
        val id = Integer.toString(i)
        val vkObject = 0L + i
        cleaner.register(vkObject, CleanerRunnable(id))
    }

    //myObjects are not reachable anymore
    //do some other memory intensive work
    for (i in 1..10000) {
        val a = IntArray(10000)
        try {
            Thread.sleep(1)
        } catch (e: InterruptedException) {
        }

    }
}

But unfortunately without success.

So my question is if there is a way to have Cleaner working with primitives representing native off-heap resources without having to wrap them in classes

asked Apr 24 '19 at 15:09

elect

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Maybe using the object type e.g. Long and rely on auto boxing? – IEE1394 Apr 24 '19 at 16:36
What do you mean by rely on auto boxing? – elect Apr 24 '19 at 16:58
`Cleaner` and off-heap are mutually exclusive. `Cleaner` and primitives are mutually exclusive. What is your actual goal? – a better oliver Apr 24 '19 at 19:03
To replicate the `Unique` handle of [vulkan hpp](https://github.com/KhronosGroup/Vulkan-Hpp#uniquehandle-for-automatic-resource-management) for automatic resource management – elect Apr 25 '19 at 06:21

Is there a way to implement the Cleaner with primitives other than boxing them in classes?

0 Answers0