- (void)release
{
    if(NSDecrementExtraRefCountWasZero(self))
        [self dealloc];
}

BOOL
NSDecrementExtraRefCountWasZero(id anObject)
{
    if(((struct obj_layout *)anObject)[-1].retained == 0){
        return YES;
    } else {
        ((struct obj_layout *)anObject)[-1].retained--;
        return NO;
    }
}