---
name: "IO::Async::Loop::Glib"
section: "3pm"
platform: "linux"
package: "libio-async-loop-glib-perl"
version: "0.22-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/IO::Async::Loop::Glib"
---

# IO::Async::Loop::Glib(3pm)

use "IO::Async" with Glib or GTK

## NAME

"IO::Async::Loop::Glib" - use "IO::Async" with Glib or GTK

## SYNOPSIS

```
   use IO::Async::Loop::Glib;
   my $loop = IO::Async::Loop::Glib->new();
   $loop->add( ... );
   ...
   # Rest of GLib/Gtk program that uses GLib
   Glib::MainLoop->new->run();
```

Or

```
   $loop->run;
```

Or

```
   while(1) {
      $loop->loop_once();
   }
```

## DESCRIPTION

This subclass of `"IO::Async::Loop"` uses the `"Glib::MainLoop"` to perform read-ready and write-ready tests.

The appropriate `"Glib::IO"` sources are added or removed from the `"Glib::MainLoop"` when notifiers are added or removed from the set, or when they change their `"want_writeready"` status. The callbacks are called automatically by Glib itself; no special methods on this loop object are required.

## CONSTRUCTOR

### new

```
   $loop = IO::Async::Loop::Glib->new()
```

This function returns a new instance of a `"IO::Async::Loop::Glib"` object. It takes no special arguments.

## METHODS

There are no special methods in this subclass, other than those provided by the `"IO::Async::Loop"` base class.

### loop\_once

```
   $loop->loop_once( $timeout )
```

This method calls the `iteration()` method on the underlying  `"Glib::MainContext"`. If a timeout value is supplied, then a Glib timeout will be installed, to interrupt the loop at that time. If Glib indicates that any callbacks were fired, then this method will return 1 (however, it does not mean that any `"IO::Async"` callbacks were invoked, as there may be other parts of code sharing the Glib main context. Otherwise, it will return 0.

## SEE ALSO

- •

  Glib - Perl wrappers for the GLib utility and Object libraries

- •

  Gtk2 - Perl interface to the 2.x series of the Gimp Toolkit library

## AUTHOR

Paul Evans \<leonerd@leonerd.org.uk\>