# libtmux::CommandRuntime::close

- **Module:** libtmux::CommandRuntime
- **Package:** libtmux-cxx
- **Language:** C++
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-cxx/blob/85e8bd603a322dc32bb8b9aeb1a72bcf36945f1d/include/libtmux/async.hpp#L84
- **Page:** https://libtmux.org/reference/cxx/libtmux-commandruntime-close/

```
libtmux::CommandRuntime::close() -> CommandRuntimeShutdown
```

Joins every owned thread without invoking or discarding observers.

The first successful report is cached; a throwing shutdown can be retried.