---
title: "SCDynamicStoreCreateRunLoopSource(_:_:_:)"
framework: systemconfiguration
role: symbol
role_heading: Function
path: "systemconfiguration/scdynamicstorecreaterunloopsource(_:_:_:)"
---

# SCDynamicStoreCreateRunLoopSource(_:_:_:)

Creates a run loop source object that can be added to the application’s run loop.

## Declaration

```swift
func SCDynamicStoreCreateRunLoopSource(_ allocator: CFAllocator?, _ store: SCDynamicStore, _ order: CFIndex) -> CFRunLoopSource?
```

## Parameters

- `allocator`: The allocator that should be used to allocate memory for the run loop source. This parameter may be NULL in which case the current default allocator is used. If this value is not a valid doc://com.apple.documentation/documentation/CoreFoundation/CFAllocator, the behavior is undefined.
- `store`: The dynamic store session.
- `order`: The order in which the sources that are ready to be processed are handled, on platforms that support it and for source versions that support it. A source with a lower order number is processed before a source with a higher order number. It is inadvisable to depend on the order number for any architectural or design aspect of code. In the absence of any reason to do otherwise, pass 0 for this parameter.

## Return Value

Return Value The new run loop source object. You must release the returned value.

## Discussion

Discussion Note that all dynamic store notifications are delivered using the run loop source this function returns.