---
title: alreadyInProcess
framework: system
role: symbol
role_heading: Type Property
path: system/errno/alreadyinprocess
---

# alreadyInProcess

Operation already in progress.

## Declaration

```swift
static var alreadyInProcess: Errno { get }
```

## Mentioned in

Adopting Swift Error Constants

## Discussion

Discussion You attempted an operation on a nonblocking object that already had an operation in progress. The corresponding C error is EALREADY.

## See Also

### System Call Errors

- [badAddress](system/errno/badaddress.md)
- [interrupted](system/errno/interrupted.md)
- [invalidArgument](system/errno/invalidargument.md)
- [noFunction](system/errno/nofunction.md)
- [nowInProgress](system/errno/nowinprogress.md)
- [resourceBusy](system/errno/resourcebusy.md)
- [resourceTemporarilyUnavailable](system/errno/resourcetemporarilyunavailable.md)