---
title: asyncLock
framework: kernel
role: symbol
role_heading: Instance Method
path: kernel/iofirewirecontroller/3516567-asynclock
---

# asyncLock

## Declaration

```occ
virtual IOReturn asyncLock(UInt32 generation, UInt16 nodeID, UInt16 addrHi, UInt32 addrLo, int speed, int label, int type, IOMemoryDescriptor *buf, IOByteCount offset, int size, IOFWAsyncCommand *cmd);
```