---
title: IOUSBHostControllerInterfaceDoorbellHandler
framework: IOUSBHost
role: symbol
role_heading: Type Alias
platforms: [Mac Catalyst 14.0+, macOS 10.15+]
path: iousbhost/iousbhostcontrollerinterfacedoorbellhandler
---

# IOUSBHostControllerInterfaceDoorbellHandler

## Declaration

```swift
typealias IOUSBHostControllerInterfaceDoorbellHandler = (IOUSBHostControllerInterface, UnsafeMutablePointer<IOUSBHostCIDoorbell>, UInt32) -> Void
```

## See Also

### Data Types

- [IOUSBHostCIDoorbell](iousbhost/iousbhostcidoorbell.md)
- [IOUSBHostCIPortStatus](iousbhost/iousbhostciportstatus.md)
- [IOUSBHostControllerInterfaceCommandHandler](iousbhost/iousbhostcontrollerinterfacecommandhandler.md)
- [IOUSBHostIsochronousTransactionCompletionHandler](iousbhost/iousbhostisochronoustransactioncompletionhandler.md)