iOS多线程编程之二——NSOperation与NSOperationQueue 一、NSOperation解析 NSOperation是基于Object-C封装的一套管理与执行线程操作的类。这个类是一个抽象类,通常情况下,我们会使用NSInvocationOperation和NSBlockOperation这两个子类进行多线程的开发,当然我们也可以写继承于NSOperatio
NSOperation
操作相关 Operation作为一个对象,为我们提供了更多的选择: 任务依赖(addDependency),可以跨队列设置操作的依赖关系; 在队列中的优先级(queuePriority) 服务质量(qualityOfService, iOS8+); 完成回调(void (^completionBlock)(void) 队列相关 服务质量(qualityOfService, iOS8+); 最大并发操作数(maxConcurrentOperation...
这种类似不是一个巧合,在早期,MacOX 与 iOS 的程序都普遍采用Operation Queue来进行编写后台线程代码,而之后出现的GCD技术大体是依照前者的原则来实现的,而随着GCD的普及,在iOS 4 与 MacOS X 10.6以后,Operation Queue的底层实现都是用GCD来实现的。 那这两者直接有什么区别呢? GCD是底层的C语言构成的API,而NSO...
// set OperationQueue in Server to .userInitiated, // prevent Server from not responding self.webServer = Server(qualityOfService: .userInitiated) self.webServer!.route(.GET, "pose", self.serverHandlePoseRequest) self.webServer!.serveBundle(.main, "/") @@ -42,10 +44,3 @@ public clas...
Queuer is a queue manager, built on top of OperationQueue and Dispatch (aka GCD). - FabrizioBrancati/Queuer
Select this option to assign the task to a user group. Users that belong to the group can be assigned a task in one of the following ways: Assign To Group Queue:Assigns the task to the group’s shared To Do list. Assign to Random User In Group:Assigns the task to any user who bel...
–Load/Store Buffer;LineFill Buffer/Write Combining Buffer;Invalidate Message Queue;... 4. CPU Memory Models Memory consistency models describe how threads may interact through shared memory consistently. There are many types of memory reordering, and not all types of reordering occur equally often...
Each output card memory can be divided into a plurality of queues, in which the number of queues corresponds to the number of flows received by the switch and the size of each queue is proportional to the fractional amount of the total bandwidth of the switch used by the corresponding ...
operation before submitting it to a queue or executing it directly. CloudKit operations involve communicating with the iCloud servers to send and receive data. You can use the properties of this class to configure the behavior of those network requests to ensure the best performance for your app...