---
title: IOWorkGroup
framework: DriverKit
role: symbol
role_heading: Class
path: driverkit/ioworkgroup
---

# IOWorkGroup

## Declaration

```occ
class IOWorkGroup;
```

## Overview

Overview Workgroups allow multiple threads to coordinate activities for realtime operations. Applications that open user clients to a DriverKit driver can send a workgroup to use in the driver. The application will have to first create an workgroup object. The application then should copy the workgroup port with os_workgroup_copy_port(). To send the workgroup port to the driver, use: const char * name = “Work Group Name”; // This must match the name the driver used in IOWorkGroup::Create(). kern_return_t ret = IOConnectTrap3(connect, // user client connection (io_connect_t) 1, // specifies event link configuration trap (uintptr_t)name, (uintptr_t)strlen(name), (uintptr_t)wgPort // port from os_workgroup_copy_port ); Once the workgroup port has been sent to the driver, the driver should be notified with a user-defined external method or other existing signaling mechanism.

## Topics

### Instance Methods

- [GetTokenSize](driverkit/ioworkgroup/gettokensize.md)
- [Invalidate](driverkit/ioworkgroup/invalidate.md)
- [Join](driverkit/ioworkgroup/join.md)
- [Leave](driverkit/ioworkgroup/leave.md)
- [free](driverkit/ioworkgroup/free.md)
- [init](driverkit/ioworkgroup/init.md)

### Type Methods

- [Create](driverkit/ioworkgroup/create.md)

## Relationships

### Inherits From

- [OSObject](driverkit/osobject.md)