al_free - Allegro 5 API

       Like free() in the C standard library, but the implementation may be overridden.

       Additionally,  on  Windows,  a memory block allocated by one DLL must be freed from the same DLL.  In the
       few places where an Allegro function returns a pointer that must be freed, you must use  al_free(3alleg5)
       for portability to Windows.

       This is a macro.

       al_free - Allegro 5 API

al_malloc(3alleg5), al_free_with_context(3alleg5)

Allegro reference manual                                                                        al_free(3alleg5)

              #include <allegro5/allegro.h>

              #define al_free(p) \
                 (al_free_with_context((p), __LINE__, __FILE__, __func__))