al_get_max_haptic_effects - Allegro 5 API

       Returns  the  maximum  amount  of haptic effects that can be uploaded to the device.  This depends on the
       operating system, driver, platform and the device itself.  This may return a value as low as 1.

       al_get_max_haptic_effects - Allegro 5 API

       5.1.8

              [UnstableAPI]: Perhaps could be simplified due to limited support for all  the  exposed  features
              across all of the platforms.  Awaiting feedback from users.

Allegro reference manual                                                      al_get_max_haptic_effects(3alleg5)

              #include <allegro5/allegro.h>

              int al_get_max_haptic_effects(ALLEGRO_HAPTIC *hap)