---
title: CAClockListenerProc
framework: audiotoolbox
role: symbol
role_heading: Type Alias
path: audiotoolbox/caclocklistenerproc
---

# CAClockListenerProc

## Declaration

```swift
typealias CAClockListenerProc = (UnsafeMutableRawPointer, CAClockMessage, UnsafeRawPointer) -> Void
```

## See Also

### Adding and Removing Listeners

- [CAClockAddListener(_:_:_:)](audiotoolbox/caclockaddlistener(_:_:_:).md)
- [CAClockRemoveListener(_:_:_:)](audiotoolbox/caclockremovelistener(_:_:_:).md)
- [CAClockMessage](audiotoolbox/caclockmessage.md)