---
title: CreateDeviceAsyncEventSource
framework: IOKit
role: symbol
role_heading: Instance Property
platforms: [Mac Catalyst 18.4+, macOS 10.14+]
path: iokit/iousbdeviceinterface942/2977136-createdeviceasynceventsource
---

# CreateDeviceAsyncEventSource

## Declaration

```occ
IOReturn (*CreateDeviceAsyncEventSource)(void *self, CFRunLoopSourceRef *source);
```