Event loop

Event loop — Integrate libvirt with the GMain event framework

Stability Level

Stable, unless otherwise indicated

Synopsis

#include <libvirt-glib/libvirt-glib.h>

void                gvir_event_register                 (void);

Description

The libvirt API has the ability to provide applications with asynchronous notifications of interesting events. To enable this functionality though, applications must provide libvirt with an event loop implementation. The libvirt-glib API provides such an implementation, which naturally integrates with the GMain event loop framework.

To enable use of the GMain event loop glue, the gvir_event_register() should be invoked. Once this is done, it is mandatory to have the default GMain event loop run by a thread in the application, usually the primary thread, eg by using gtk_main() or g_application_run()

Example 3. Registering for events with a GTK application

int main(int argc, char **argv) {
  ...setup...
  gvir_event_register();
  ...more setup...
  gtk_main();
  return 0;
}

Example 4. Registering for events using Appplication

int main(int argc, char **argv) {
  ...setup...
  GApplication *app = ...create some impl of GApplication...
  gvir_event_register();
  ...more setup...
  g_application_run(app);
  return 0;
}

Details

gvir_event_register ()

void                gvir_event_register                 (void);

Registers a libvirt event loop implementation that is backed by the default GMain context. If invoked more than once this method will be a no-op. Applications should, however, take care not to register any another non-GLib event loop with libvirt.

After invoking this method, it is mandatory to run the default GMain event loop. Typically this can be satisfied by invoking gtk_main or g_application_run in the application's main thread. Failure to run the event loop will mean no libvirt events get dispatched, and the libvirt keepalive timer will kill off libvirt connections frequently.

			Libvirt GLib Reference Manual
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