Function allegro_audio_sys::allegro_audio::al_set_mixer_postprocess_callback

pub unsafe extern "C" fn al_set_mixer_postprocess_callback(
    mixer: *mut ALLEGRO_MIXER, 
    cb: Option<extern "C" fn(arg1: *mut c_void, arg2: c_uint, arg3: *mut c_void)>, 
    data: *mut c_void
) -> c_bool