ObjFW  Diff

		extraAlignment = ((instanceSize + extraAlignment - 1) &
		    ~(extraAlignment - 1)) - extraAlignment;

	instance = malloc(PRE_IVAR_ALIGN + instanceSize +
	    extraAlignment + extraSize);

	if OF_UNLIKELY (instance == nil) {
		object_setClass((id)&alloc_failed_exception,
		    [OFAllocFailedException class]);
		alloc_failed_exception.isa = [OFAllocFailedException class];
		@throw (id)&alloc_failed_exception;
	}

	((struct pre_ivar*)instance)->retainCount = 1;
	((struct pre_ivar*)instance)->firstMem = NULL;
	((struct pre_ivar*)instance)->lastMem = NULL;