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# MTLIOScratchBufferAllocator

A protocol your app implements to provide scratch memory to an input/output command queue.

```
protocol MTLIOScratchBufferAllocator : NSObjectProtocol
```

## Overview

An allocator returns instances of [`MTLIOScratchBuffer`](/documentation/Metal/MTLIOScratchBuffer), another type your app implements.

## Topics

### Providing scratch memory to a queue

[`makeScratchBuffer(minimumSize:)`](/documentation/Metal/MTLIOScratchBufferAllocator/makeScratchBuffer(minimumSize:))

Creates a scratch memory buffer for an input/output command queue.


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