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# MTLPurgeableState

The purgeable state of the resource.

```
enum MTLPurgeableState
```

## Topics

### Specifying purgeable states

[`MTLPurgeableState.keepCurrent`](/documentation/Metal/MTLPurgeableState/keepCurrent)

The current state is queried but doesn’t change.

[`MTLPurgeableState.nonVolatile`](/documentation/Metal/MTLPurgeableState/nonVolatile)

The contents of the resource aren’t allowed to be discarded.

[`MTLPurgeableState.volatile`](/documentation/Metal/MTLPurgeableState/volatile)

The system is allowed to discard the resource to free up memory.

[`MTLPurgeableState.empty`](/documentation/Metal/MTLPurgeableState/empty)

A state that indicates to the system that it needs to consider
the contents of a resource as invalid, typically because you’re discarding it.


---

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