---
title: kIOMatchingCalloutFuncIndex
framework: Kernel
role: symbol
role_heading: Enumeration Case
platforms: [macOS 10.12+]
path: kernel/1645645-anonymous/kiomatchingcalloutfuncindex
---

# kIOMatchingCalloutFuncIndex

## Declaration

```occ
kIOMatchingCalloutFuncIndex = kIOAsyncReservedCount
```