---
title: Activate
framework: DriverKit
role: symbol
role_heading: Instance Method
path: driverkit/ioeventlink/activate
---

# Activate

## Declaration

```occ
kern_return_t Activate();
```

## Return Value

Return Value kIOReturnSuccess on success. See IOReturn.h for error codes.

## Discussion

Discussion Activate the event link. The event link must be activated before it can be signaled or waited on. This is not real-time safe.