phish thread

Original: http://www.cnblogs.com/luckboy/archive/2010/12/19/1910785.html1. Set the Checkforillegalcrossthreadcalls to False2, the use of commissionedDelegate voidSettextcallback (stringtext); Private voidSetText (stringtext) { if( This. txt_a.invokerequired) {Settextcallback STCB=NewSettextcallback (SetText); This. Invoke (STCB,New Object[] {text}); } Else { This. Txt_a.text =text; } } Private voidLoadData () {SetText ("Test"); }

I. OverviewPriority of the thread:When we create a thread, we specify a priority that affects the chance that the thread will execute.The meaning of the opportunity is that the thread executes more, but there is no guarantee that the thread will execute more times than the lower priority

One. Thread queueIncoming thread queue: Import Queue #和普通队列引入方法相同Thread Queue method:Q = queue. Queue () #实例化对列, FIFOQ = queue. Lifoqueue () #实例化队列, LIFO (last on, first out)Q = queue. Priorityqueue () #实例化队列, priority queueThe priority queue, the put () method receives a tuple, the first element is the priority, the second element is the dataPriority if numeric,

The difference between synchronous code block and synchronous method: Synchronous code block can pass in arbitrary object, synchronous method if more than one thread examines a new object, different synchronization locks are not exclusive to different threads, cannot realize thread synchronization effect, then thread synchronization fails.The difference between t

Use thread task class and thread class summary in C #Just contact c#3 months or so, has been using C + + development, because the company's needs, the use of C # development, mainly control the real-time operation of equipment, this is the background.For task and thread in C # I do not introduce here, to learn more, if you look at the considerable information. Us

One, the thread stops:There is a stop () method, which, while still available, is obsolete, and therefore recommends the following methods.1, stop a thread: we generally will be controlled by a variable. 2, if you need to stop a thread in the waiting state, then we need to use the variable with the Notify method or interrupt ().Prerequisite: A

1. Create a new thread () using new threads () The new state system does not allocate resources for it at this time 2. The thread object calls the start () method into the Ready state 3. Wait for the system to be scheduled into operation (if you know that you have completed the work required in one iteration of the loop of the Run () method, you can schedule a mechanism for the

Requirements: Assume that a thread (Jarthread) is reading a jar archive from a network connection (modeled by System.in). The first item in this archive is the manifest file (end With '/' identity). Another thread (mainthread) may be interested in the contents of this manifest file, even if the remainder of the archive is not yet available. The thread that is int

under what circumstances the thread pool is used. 1. Single task processing time is relatively short2. The number of tasks to be addressed is largebenefits of using a thread pool:1. Reduce the time spent on creating and destroying threads and the overhead of system resources2. If you do not use a thread pool, it is possible that the system creates a large number

One, asynchronous + callback: Who is the thread who is empty, the process is the main process callFrom concurrent.futures import Processpoolexcutor,threadpoolexecutorFrom threading Import Current_threadImport Requests,os,time,randomdef get (URL):Print ('%s GET%s '% (Current_thread (). Name,url))Response=requests.get (URL)Time.sleep (Random.randint (1,3))If response.status_code=200:Return Response.textdef pasrse (obj):Res=obj.result ()Print ('%s parsin

When we need to control access to shared resources, we can use a simple lock-up method to control. We can create a read / write program that shares a shared buffer and uses a mutex to control access to the buffer. 　The function pthread_mutex_init () is used to generate a mutex lock. Its function prototype is as follows:#include int Pthread_mutex_init (pthread_mutex_t *restrict Mutex,const pthread_mutexattr_t *restrict attr) ;The first parameter is the address of the mutex, and the second paramet

There are often problems with Android projects that update the UI after a time-consuming operation in a child thread, and then summarize the updated methods for some of the projects that you have experienced:Look at the message mechanism in Android before looking at the method:ReferenceMessage: Messages that contain the message ID, the message Processing object, and the processed data are queued by MessageQueue and processed by handler.Handler: Handle

What is a thread-local variable (thread-local variable). Easy to use threads: do not share sometimes the best ThreadLocal classes are quietly appearing in version 1.2 of the Java platform. Although supporting thread-local variables has long been part of many threading tools, such as the Posix pthreads tool, the original design of the Java Threads API does not hav

/*** Book: Thinking in Java * Function: We can set the corresponding priority when executing the thread * file: simplepriorities.java* time: May 7, 2015 15:17:09* Author: cutter_point*/ Package Lesson21concurency;import Java.util.concurrent.executorservice;import java.util.concurrent.Executors; public class Simplepriorities implements runnable{private int countdown = 5;//Here we use volatile in order to ensure that no compiler optimizations are made t

private void Button1_Click (object sender, EventArgs e){int i = 0;Thread th = new Thread (new ThreadStart () ={while (true){Thread.Sleep (1000);//tedious operation, or IO waiting to be placed inside this threadThis. Invoke (new Action () ={//When you need to manipulate interface elements, you need to use invoke, note that there is no cumbersome operation of the surfaceTxtbox.text = (i++). ToString ();Thread

When learning a thread, you must be exposed to a class thread and an interface runnableBoth of these methods can be used for threading, then I will use two examples to explain how these two separate use//=======================================================================//Implement Runnable//=======================================================================//Code:Package test;public class Demo exte

Packagecom. Thread; PublicclassState { PublicStaticvoidMain (string[] args) {Study s =New Study ();Thread t =NewThread (s);T.start (); //External interference--stop thread body for(inti = 0; i if(i==500) {S.setflag (false);}System. out. println ("main Thread ..."+ i);}}}classStudyImplementsRunnable {///1, define--->

frequency at which the timer should be triggered. The unit of the third parameter is microseconds - The other two parameters are not described here first, if interested can read "Windows core Programming (Fifth Edition)" 245 pages or refer to MSDN. - if it is just a simple application, the following three parameters, followed by filling in Null,null,false can, hey, simple! - - in Special attention: - If the timer is reset manually, then all threads that are waiting for that

(type type in types) { Console.WriteLine ("Type is{0}, type"); Console.WriteLine ("\n{0} types found." Types. Length); } Latebinding Type MathType =type.gettype ("System.Math"); Object obj = activator.createrinstance (MathType); type[] parametertypes = new type[2]; Parametertypes[0] = Type.GetType ("System.Double"); PARAMETERTYPES[1] = Type.GetType ("System.Double"); MethodInfo powinfo = Mathtype.getmethod ("Pow", parametertypes); object[] Parameters = new Object[2]; Parameters[0] = 5; PARAM

The topic of this article is thread collaboration and deadlock. Thread collaboration I personally think is thread communication. For example, if there are two threads a and B, both A and B can run independently, and a and B sometimes exchange information, this is the thread collaboration. In Java,