al_start_thread - Man Page

#include <allegro5/allegro.h>

void al_start_thread(ALLEGRO_THREAD *thread)

When a thread is created, it is initially in a suspended state. Calling al_start_thread(3) will start its actual execution.

Starting a thread which has already been started does nothing.

al_create_thread(3).

al_create_thread(3), al_create_thread_with_stacksize(3), al_run_detached_thread(3).