Darwin Notification

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Darwin Notification

  • 跨进程间消息收发
  • 接收到系统发出的消息

发送通知：

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/* This function is called when a notification is received. */
void MyNotificationCenterCallBack(CFNotificationCenterRef center,
        void *observer,
        CFStringRef name,
        const void *object,
        CFDictionaryRef userInfo)
{
    printf("Notification center handler called\n");
}

...

/* Create a notification center */
CFNotificationCenterRef center = CFNotificationCenterGetDarwinNotifyCenter();

/* Tell notifyd to alert us when this notification
   is received. */
if (center) {
    CFNotificationCenterAddObserver(center,
        NULL,
        MyNotificationCenterCallBack,
        CFSTR("org.apache.httpd.configFileChanged"),
        NULL,
        CFNotificationSuspensionBehaviorDeliverImmediately);
    ...
}

// Post
CFNotificationCenterPostNotification(center, CFSTR("Notification Name"), NULL, NULL, TRUE);

参考

钟颖 Cyan知乎专栏
Apple doc
开源项目