<!--
{
  "availability" : [
    "DriverKit: 27.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "VideoDriverKit",
  "identifier" : "/documentation/VideoDriverKit/IOUserVideoClockDevice/SetDeviceIsAlive",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Method",
  "symbol" : {
    "kind" : "Instance Method",
    "modules" : [
      "VideoDriverKit"
    ],
    "preciseIdentifier" : "c:@S@IOUserVideoClockDevice@F@SetDeviceIsAlive#b#"
  },
  "title" : "SetDeviceIsAlive"
}
-->

# SetDeviceIsAlive

Sets a Boolean value to indicate the device is alive.

```
kern_return_t SetDeviceIsAlive(bool in_is_alive);
```

## Parameters

`in_is_alive`

True if device is alive.

## Discussion

A true  value means the device is ready and available and false
means the device is unusable and will most likely go away shortly.

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)