---
title: sem
framework: Kernel
role: symbol
platforms: [macOS 10.6+]
path: kernel/sem
---

# sem

## Declaration

```occ
struct sem {
    ...
};
```

## Topics

### Instance Properties

- [semncnt](kernel/sem/1574538-semncnt.md)
- [sempid](kernel/sem/1574568-sempid.md)
- [semval](kernel/sem/1574544-semval.md)
- [semzcnt](kernel/sem/1574558-semzcnt.md)