void pwr_callback(void *x, io_service_t srv, natural_t msg_type, void *arg);

static io_connect_t root_port;

void BBRegisterForPowerNotifications()
{
    /* Taken from Apple's documentation. */
    IONotificationPortRef   notify;
    io_object_t             iterator;
    
    root_port = IORegisterForSystemPower(NULL,         /* Date returned on state notification */
                                         &notify,      /* Port that will receive notifications */
                                         pwr_callback, /* Callback function */
                                         &iterator);   /* Pointer to notifier */
    if (!root_port) return;
    
    CFRunLoopAddSource(CFRunLoopGetCurrent(),                      /* Run loop to modify */
                       IONotificationPortGetRunLoopSource(notify), /* Run loop source to add */
                       kCFRunLoopDefaultMode);                     /* Mode */
}

void pwr_callback(void *x, io_service_t srv, natural_t msg_type, void *arg)
{
    if (msg_type == kIOMessageSystemHasPoweredOn) {
        CFNotificationCenterPostNotification(CFNotificationCenterGetLocalCenter(), /* The notification center to post to */
                                             BBComputerDidWakeNotification,        /* The name of the notification */
                                             NULL,                                 /* Object posting notification */
                                             NULL,                                 /* Additional info */
                                             false);                               /* Deliver immediately? */
    } else if (msg_type == kIOMessageCanSystemSleep || msg_type == kIOMessageSystemWillSleep) {
        /* If this is not implemented, there is a 30-second delay before sleep. */
        IOAllowPowerChange(root_port, (long)arg);
    }
}

- (id)init
{
    if (self = [super init]) {
        dataFileParser = [[MDDataFileParser alloc] init];
        dockMenu = nil;
        timer = nil;
    }
    return self;
}

- (void)dealloc
{
    [[NSNotificationCenter defaultCenter] removeObserver:self];
    [dataFileParser release]; dataFileParser = nil;
    [dockMenu release]; dockMenu = nil;
    [timer invalidate]; timer = nil;   // Do not release -- not retained by object
    [super dealloc];
}