---
title: retain
framework: driverkit
role: symbol
role_heading: Instance Method
path: driverkit/osboolean/retain
---

# retain

Retains the OSObject instance

## Declaration

```occ
virtual void retain() const;
```

## Discussion

Discussion Increases the retain count of the instance by one.

## See Also

### Configuring a Boolean Type

- [free](driverkit/osboolean/free.md)
- [release](driverkit/osboolean/release.md)
- [OSBooleanPtr](driverkit/osbooleanptr.md)