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# MTLCommandBufferStatus

The discrete states for a command buffer that represent its life cycle stages.

```
enum MTLCommandBufferStatus
```

## Topics

### Command buffer states

[`MTLCommandBufferStatus.notEnqueued`](/documentation/Metal/MTLCommandBufferStatus/notEnqueued)

A command buffer’s initial state, which indicates its command queue isn’t reserving a place for it.

[`MTLCommandBufferStatus.enqueued`](/documentation/Metal/MTLCommandBufferStatus/enqueued)

A command buffer’s second state, which indicates its command queue is reserving a place for it.

[`MTLCommandBufferStatus.committed`](/documentation/Metal/MTLCommandBufferStatus/committed)

A command buffer’s third state, which indicates the command queue is preparing to schedule the command buffer by resolving its dependencies.

[`MTLCommandBufferStatus.scheduled`](/documentation/Metal/MTLCommandBufferStatus/scheduled)

A command buffer’s fourth state, which indicates the command buffer has its resources ready and is waiting for the GPU to run its commands.

[`MTLCommandBufferStatus.completed`](/documentation/Metal/MTLCommandBufferStatus/completed)

A command buffer’s successful, final state, which indicates the GPU finished running the command buffer’s commands without any problems.

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

A command buffer’s unsuccessful, final state, which indicates the GPU stopped running the buffer’s commands because of a runtime issue.


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