---
title: reservedSpaceLength
framework: foundation
role: symbol
role_heading: Instance Property
path: foundation/port/reservedspacelength
---

# reservedSpaceLength

The number of bytes of space reserved by the receiver for sending data.

## Declaration

```swift
var reservedSpaceLength: Int { get }
```

## Discussion

Discussion The number of bytes reserved by the receiver for sending data. The default length is 0.

## See Also

### Setting information

- [send(before:components:from:reserved:)](foundation/port/send(before:components:from:reserved:).md)
- [send(before:msgid:components:from:reserved:)](foundation/port/send(before:msgid:components:from:reserved:).md)