al_stop_timer - Allegro 5 API

       Stop the timer specified.  The timer’s counter will stop incrementing and it will stop generating events.
       Stopping a timer that is already stopped does nothing.

       al_stop_timer - Allegro 5 API

al_start_timer(3alleg5), al_get_timer_started(3alleg5), al_resume_timer(3alleg5)

Allegro reference manual                                                                  al_stop_timer(3alleg5)

              #include <allegro5/allegro.h>

              void al_stop_timer(ALLEGRO_TIMER *timer)