---
title: IO_Impl
framework: kernel
role: symbol
role_heading: Instance Method
path: kernel/iousbhostpipe/3294716-io_impl
---

# IO_Impl

## Declaration

```occ
kern_return_t IO_Impl(IOMemoryDescriptor *dataBuffer, uint32_t dataBufferLength, uint32_t *bytesTransferred, uint32_t completionTimeoutMs);
```