---
title: CFPlugInFactoryFunction
framework: corefoundation
role: symbol
role_heading: Type Alias
path: corefoundation/cfpluginfactoryfunction
---

# CFPlugInFactoryFunction

Callback function that a plug-in author must implement to create a plug-in instance.

## Declaration

```swift
typealias CFPlugInFactoryFunction = (CFAllocator?, CFUUID?) -> UnsafeMutableRawPointer?
```

## Parameters

- `allocator`: The allocator to use to allocate memory for the new object. Pass NULL or kCFAllocatorDefault to use the default allocator.
- `typeUUID`: The UUID type to instantiate.

## Discussion

Discussion The plug-in author’s implementation of this function is registered with CFPlugIn either statically in the plug-in’s information property list, or dynamically. This function is executed as a result of a call to CFPlugInInstanceCreate(_:_:_:) by the plug-in host.

## See Also

### Callbacks

- [CFPlugInDynamicRegisterFunction](corefoundation/cfplugindynamicregisterfunction.md)
- [CFPlugInUnloadFunction](corefoundation/cfpluginunloadfunction.md)