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# MTLIOStatus

Represents the state of an input/output command buffer.

```
enum MTLIOStatus
```

## Topics

### I/O command queue states

[`MTLIOStatus.pending`](/documentation/Metal/MTLIOStatus/pending)

Indicates the GPU hasn’t finished executing the input/output command buffer.

[`MTLIOStatus.complete`](/documentation/Metal/MTLIOStatus/complete)

Indicates the GPU has successfully finished executing the input/output command buffer.

[`MTLIOStatus.cancelled`](/documentation/Metal/MTLIOStatus/cancelled)

Indicates the GPU has successfully abandoned the input/output command buffer.

[`MTLIOStatus.error`](/documentation/Metal/MTLIOStatus/error)

Indicates the GPU experienced a problem with the input/output command buffer.


---

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