<!--
{
  "availability" : [
    "macOS: 27.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "FSKit",
  "identifier" : "/documentation/FSKit/FSFreeSpace",
  "metadataVersion" : "0.1.0",
  "role" : "Class",
  "symbol" : {
    "kind" : "Class",
    "modules" : [
      "FSKit"
    ],
    "preciseIdentifier" : "c:objc(cs)FSFreeSpace"
  },
  "title" : "FSFreeSpace"
}
-->

# FSFreeSpace

A free space object that pairs free space values with atomic sequence numbers.

```
class FSFreeSpace
```

## Topics

### Creating a free space instance

[`init()`](/documentation/FSKit/FSFreeSpace/init())

Creates an unpopulated free space instance.

### Setting the free space value

[`func populate(bytes: UInt64)`](/documentation/FSKit/FSFreeSpace/populate(bytes:))

Populates this instance with the given free space value and atomically assigns a sequence number.

### Working with special instances

[`class var noUpdate: FSFreeSpace`](/documentation/FSKit/FSFreeSpace/noUpdate)

A sentinel instance that indicates no free space update occurred.

## Relationships

### Conforms To

[`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible)

[`CVarArg`](/documentation/Swift/CVarArg)

[`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol)

[`Hashable`](/documentation/Swift/Hashable)

[`Equatable`](/documentation/Swift/Equatable)

[`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible)

### Inherits From

[`NSObject-swift.class`](/documentation/ObjectiveC/NSObject-swift.class)

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)