---
name: "al_is_event_source_registered"
section: "3"
platform: "linux"
package: "allegro"
version: "5.2.11.3-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/al_is_event_source_registered"
---

# al\_is\_event\_source\_registered(3)

Allegro 5 API

## NAME

al\_is\_event\_source\_registered - Allegro 5 API

## SYNOPSIS

-

  ```
  #include <allegro5/allegro.h>
  bool al_is_event_source_registered(ALLEGRO_EVENT_QUEUE *queue,
        ALLEGRO_EVENT_SOURCE *source)
  ```

## DESCRIPTION

Return true if the event source is registered.

## SEE ALSO

[al\_register\_event\_source(3)](/al_register_event_source/3.md)

## SINCE

5\.2.0