---
title: IO
framework: kernel
role: symbol
role_heading: Instance Method
path: kernel/iousbhostpipe/3294715-io
---

# IO

## Declaration

```occ
kern_return_t IO(IOMemoryDescriptor *dataBuffer, uint32_t dataBufferLength, uint32_t *bytesTransferred, uint32_t completionTimeoutMs, OSDispatchMethod supermethod);
```