---
title: CFNotificationCenterGetDarwinNotifyCenter()
framework: Core Foundation
role: symbol
role_heading: Function
path: corefoundation/cfnotificationcentergetdarwinnotifycenter()
---

# CFNotificationCenterGetDarwinNotifyCenter()

Returns the application’s Darwin notification center.

## Declaration

```swift
func CFNotificationCenterGetDarwinNotifyCenter() -> CFNotificationCenter!
```

## Return Value

Return Value The application’s Darwin notification center.

## Discussion

Discussion This notification center is used to cover the <notify.h> Core OS notification mechanism (see /usr/include/notify.h). An application has only one Darwin notification center, so this function returns the same value each time it is called. The Darwin Notify Center has no notion of per-user sessions, all notifications are system-wide. As with distributed notifications, the main thread’s run loop must be running in one of the common modes (usually kCFRunLoopDefaultMode) for Darwin-style notifications to be delivered. important: Several function parameters are ignored by Darwin notification centers. To ensure future compatibility, you should pass NULL or 0 for all ignored arguments.

## See Also

### Accessing a Notification Center

- [CFNotificationCenterGetDistributedCenter()](corefoundation/cfnotificationcentergetdistributedcenter().md)
- [CFNotificationCenterGetLocalCenter()](corefoundation/cfnotificationcentergetlocalcenter().md)