---
title: ReadPipeTO
framework: IOKit
role: symbol
role_heading: Instance Property
platforms: [Mac Catalyst 18.4+, macOS 10.14+]
path: iokit/iousbinterfaceinterface942/2977237-readpipeto
---

# ReadPipeTO

## Declaration

```occ
IOReturn (*ReadPipeTO)(void *self, UInt8 pipeRef, void *buf, UInt32 *size, UInt32 noDataTimeout, UInt32 completionTimeout);
```