void IoAudioMixer_mark(IoAudioMixer *self)
{
/* buffer is a UArray */
List_do_(DATA(self)->sounds, (ListDoCallback *)IoObject_makeGrayIfWhite);
List_do_(DATA(self)->events, (ListDoCallback *)AudioEvent_mark);
List_do_(DATA(self)->activeEvents, (ListDoCallback *)AudioEvent_mark);
List_do_(DATA(self)->soundsToRemove, (ListDoCallback *)IoObject_makeGrayIfWhite);
IoObject_makeGrayIfWhite(DATA(self)->ioAudioDevice);
IoObject_makeGrayIfWhite(DATA(self)->writeMessage);
IoObject_makeGrayIfWhite(DATA(self)->nonBlockingWriteMessage);
IoObject_makeGrayIfWhite(DATA(self)->ioBuffer);
}
void IoEventManager_mark(IoEventManager *self)
{
IoObject_shouldMark(DATA(self)->handleEventMessage);
List_do_(DATA(self)->activeEvents, (ListDoCallback *)IoObject_shouldMark);
// add code to walk event list and mark context values
}