---
title: cdevsw_isfree
framework: Kernel
role: symbol
role_heading: Function
platforms: [macOS 10.4+]
path: kernel/1457965-cdevsw_isfree
---

# cdevsw_isfree

## Declaration

```occ
int cdevsw_isfree(int);
```

## See Also

### Block Device

- [bdevsw_add](kernel/1457957-bdevsw_add.md)
- [bdevsw_isfree](kernel/1457925-bdevsw_isfree.md)
- [bdevsw_remove](kernel/1457943-bdevsw_remove.md)
- [cdevsw_add](kernel/1457951-cdevsw_add.md)
- [cdevsw_add_with_bdev](kernel/1458015-cdevsw_add_with_bdev.md)
- [cdevsw_remove](kernel/1458013-cdevsw_remove.md)