---
title: sendOutputNotification
framework: kernel
role: pseudoSymbol
path: kernel/iostream/1809783-sendoutputnotification
---

# sendOutputNotification

Send a notification to the user client that data is available for reading on the output queue. This will result in the user's output handler being called, if they registered one.

## Declaration

```occ
virtual IOReturn sendOutputNotification(
 void); 
```

## Return Value

Return Value Returns kIOReturnSuccess if the notification was successfully sent.

## See Also

### Managing notification ports

- [getInputPort](kernel/iostream/1809770-getinputport.md)
- [getOutputPort](kernel/iostream/1809774-getoutputport.md)
- [setInputPort](kernel/iostream/1809793-setinputport.md)
- [setOutputPort](kernel/iostream/1809801-setoutputport.md)