offscreen dispatch

Introduction: Grand Central Dispatch (GCD) is a technology developed by Apple to optimize applications that support multi-core processors and other systems of Symmetric Multi-processing systems. This is based on the Thread Pool Mode for concurrent task execution. It is released on Mac OS X 10.6 For the first time, and is also available for iOS 4 and later versions.Design: GCD works as follows: allows programs to queue specific tasks in parallel and sc

DetailsIOS developmentApplicationConcurrent Dispatch QueuesThis document introduces almost all tasks completed by threads in the scheduling queue. The scheduling queue is simpler, easier to use, and more efficient than the thread code. The following describes how to use a scheduling queue to execute tasks in an application. 1. about scheduling queues All scheduling queues are first-in-first-out queues. Therefore, the Starting sequence of tasks in the

follows: [Java]View plaincopy Public void method (Father ){ If (father instanceof son1 ){ Method (son1) Father ); } Else if (father instanceof son2 ){ Method (son2) Father ); } Else if (father instanceof father ){ System. Out. println ("this is Father's method "); } } Please note that we must put the condition for determining whether the class is a parent class (that is, the condition for determining whether the class is a father class) At the end, otherwise it will be regarded as a

Differences between render, redirect, and dispatch in CakePHP. csdn. in CakePHP, netkunshan_shenbinarticledetails6221219 redirects to three commonly used functions: render, redirect, dispatch1, and render functions publicfunctionrender (render, redirect, and dispatch in CakePHP ). Http://blog.csdn.net/kunshan_shenbin/article/details/6221219 In CakePHP, the three functions that are frequently used for jump a

Differences between render, redirect, and dispatch in CakePHP: differences between render, redirect, and dispatch in CakePHP Http://blog.csdn.net/kunshan_shenbin/article/details/6221219 In CakePHP, the three functions that are frequently used for jump are render, redirect, and dispatch. 1. render function Public function render ($ action = null, $ layout = null,

Let's understand it literally. intuitively, it refers to two dispatches. What does dispatch mean here? For example: Class Event{ Public : Virtual Void Printname (){Cout " I am a general event " Endl;}} Class Keyevent: Public Event{ Public : Virtual Void Printname (){Cout " I am a key event " Endl;}} Class Clickevent: Public Event{ Public : Virtual Void Printname (){Cout " Click events " Endl;}}

The difference between Render,redirect,dispatch in cakephp http://blog.csdn.net/kunshan_shenbin/article/details/6221219 In cakephp, jump through three commonly used functions, render,redirect,dispatch 1. Render function Public function render ($action = null, $layout = NULL, $file = NULL) Render String $action String $layout String $file Render rendered view, you may not use this method often, because the

I. ConceptsStatic Dispatch occurs during the compilation period. The assignment is based on the Static type information, and the method overload is Static assignment.Dynamic Dispatch (Dynamic Dispatch) occurs during the running period. Dynamic Dispatch dynamically replaces a method. Object-oriented languages use dynami

One, the implementation of the Dispatch queue:1, used to manage the FIFO queue implemented by the C language layer of the appended block.A lightweight signal for exclusive control implemented in the 2,atomic function.3, some containers that are implemented by the C language layer for managing threads.Second, the benefits of CGD.No matter how hard programmers try to write code that manages threads, it is not possible to outperform the GCD implemented a

Abstract state machine class QFSM or QHSM has a function pointer that points to the specific state function in the inherited state machine class, which has two interface function init () and dispatch (), which works by understanding the key of the state machine handling event process.The State machine class inherits from QFSM or QHSM, and inherits this function pointer, which is used to dynamically point to the private state function in the specific s

based on the new URL. There is a typical feature of redirection, that is, when a request is redirected, the URL displayed on the browser is often no longer the one requested at the beginning. This is the origin of redirection. A typical application of HTTP redirection is to prevent repeated submission of forms. The principle is: if a user information editing page is used, the form is submitted to saveuser through post. action. After the request is submitted, a redirected response can be returne

Java design pattern (3) Visitor pattern and Application in Multi-Dispatch scenariosThe basic concept of Visitor encapsulates operations that act on each element in the data structure. Different operations can be implemented with the help of the new visitor, reducingCouplingVisitors canData StructureAndData OperationsDecoupling makes it unnecessary to modify the data structure or modify the original operation for the added operations on the data struct

in entry. S in:......Ret_from_exception: #从异常中返回的入口Preempt_stop #解释为 CLI, off interrupt, which is not allowed to be preempted during return from exceptionRET_FROM_INTR: #从中断返回的入口Get_thread_info (%EBP) #取task_struct的thread_info信息MOVL eflags (%ESP),%eaxMovb CS (%ESP),%alTestl $ (Vm_mask | 3),%EAXJZ Resume_kernel # "Return to User state" and "return in nuclear mentality" junctionENTRY (Resume_userspace)CliMOVL ti_flags (%EBP),%ecxAndl $_tif_work_mask,%ECX #(_tif_notify_resume | _tif_sigpending#| _

Design Summary Network Office is the trend of modern enterprise development. This paper mainly expounds the function module of the transceiver management system based on B/s structure and how to use ASP and SQL Server to solve some related technologies, including the security of the system. Keywords network office; b/S structure; receipt and dispatch management system; ASP technology; security Introduction Traditional manual Office is unable to mee

This evening, I read "multi-purpose dispatch queue, less synchronization lock" for the second time, understood it again, and typed the code again. After reading this section, you cannot see the calendar. I will sort out what I understand and what I want to express. (Title: 52 effective methods for compiling high-quality iOS and OS X code) During the encoding process, if multiple threads need to execute the same code, problems may occur sometimes, such

boss's number must be less than his own numberBI . Output outputs a number that represents the maximum value of customer satisfaction in the budget. Sample Input5 40 3 31 3 52 2 21 2 42 3 1Sample Output6HINTIf we choose a ninja numbered 1 as a manager and dispatch a third and fourth Ninja, the sum of the salaries is 4, not exceeding the total budget of 4. Since 2 ninjas were dispatched and the manager's leadership was 3,User satisfaction is 6, is the

The dispatch methods provided by the system are as follows: //dispatch methods provided by the system//Background execution:Dispatch_async (Dispatch_get_global_queue (0,0), ^{ //something }); //main thread Execution:Dispatch_async (Dispatch_get_main_queue (), ^{ //something }); //Disposable Execution: Staticdispatch_once_t Oncetoken; Dispatch_once (oncetoken, ^{ //something

Label: style blog io color ar use sp strong divTo create your own dispatch queue with a unique name: Use the dispatch_queue_create function.Discussion:With GCD, you can create your own serial dispatch queue: We will use the dispatch_queue_create function to create a serial queue. This functionThe first parameter is a C string (char *),It uniquely identifies the serial queue in the system. The reason why I s

Use of DISPATCH commands General Command execution [Email protected]/]# date >>/home/mydate.txt#--------------------------- View effects---------------------------------[[email protected]/]# Cat/home/mydate.txtmon 07:04:56 EDT 20152. Execution of DISPATCH commands[[email protected]/]# Crontab-eno crontab for root-using an empty one* * * * * Date >>/home/mydate.txt# time of the moon Week #* * *

Building projectsCreate a Springboot project, add @enablescheduling to its program entry, and start the dispatch task.@SpringBootApplication @enableschedulingpublic class Springbootschedulingtasksapplication {public static void Main (string[] args) { springapplication.run (springbootschedulingtasksapplication.class, args);} }　　Create a timed taskCreate a timed task that prints the current time in the console every 5s.@Componentpublic clas