---
title: FSPreallocateKOIOResult
framework: fskit
role: symbol
role_heading: Class
path: fskit/fspreallocatekoioresult
---

# FSPreallocateKOIOResult

The result of a kernel-offloaded preallocate call.

## Declaration

```swift
class FSPreallocateKOIOResult
```

## Overview

Overview Use this type in your implementation of preallocateSpace(for:at:length:flags:packer:context:replyHandler:)

## Relationships

### Inherits From

- [FSPreallocateResult](fskit/fspreallocateresult.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)

## See Also

### Working with items

- [createFile(named:in:attributes:packer:context:replyHandler:)](fskit/fsvolume/kerneloffloadediohandler/createfile(named:in:attributes:packer:context:replyhandler:).md)
- [FSItem.SetAttributesRequest](fskit/fsitem/setattributesrequest.md)
- [FSCreateFileKOIOResult](fskit/fscreatefilekoioresult.md)
- [lookupItem(named:in:packer:context:replyHandler:)](fskit/fsvolume/kerneloffloadediohandler/lookupitem(named:in:packer:context:replyhandler:).md)
- [FSLookupItemKOIOResult](fskit/fslookupitemkoioresult.md)
- [preallocateSpace(for:at:length:flags:packer:context:replyHandler:)](fskit/fsvolume/kerneloffloadediohandler/preallocatespace(for:at:length:flags:packer:context:replyhandler:).md)
- [FSVolume.PreallocateFlags](fskit/fsvolume/preallocateflags.md)