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This article mainly explains "what is the function of C # thread and how to create it". Interested friends might as well take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "what is the function of C # thread and how to create it?"

The function and significance of threads

A thread is defined as the execution path of the program. Each thread defines a unique control flow. If your application involves complex and time-consuming operations, it is often beneficial to set different thread execution paths, and each thread performs specific work.

Threads are lightweight processes. A common example of using threads is the implementation of parallel programming in modern operating systems. Using threads saves the waste of CPU cycles and improves the efficiency of the application.

The program we have written so far runs as a single process of a single thread as a running instance of the application. However, in this way the application can only perform one task at a time. In order to perform multiple tasks simultaneously, it can be divided into smaller threads.

Thread life cycle

The thread life cycle begins when an object of the System.Threading.Thread class is created and ends when the thread is terminated or finishes execution.

The various states in the thread life cycle are listed below:

Unstarted state: the situation when a thread instance is created but the Start method is not called.

Ready state: what happens when a thread is ready to run and wait for a CPU cycle.

Unrunnable state: threads are not runnable in the following situations:

The Sleep method has been called

The Wait method has been called

Blocking by Icano operation

Dead state: the condition when a thread has finished execution or aborted

C # create thread

When using a thread in the C # language, you first need to create a thread, and when you use the constructor of the Thread class to create its instance, you need to use a ThreadStart delegate or a ParameterizedThreadStart delegate to create an instance of the Thread class. ThreadStart delegates can only be used for methods that have no return value and no parameters, while ParameterizedThreadStart delegates can be used for methods with parameters.

Created in the way of ThreadStar

Example:

Using System;using System.Threading;namespace MultithreadingApplication {class ThreadCreationProgram {/ / Thread function public static void CallToChildThread () {Console.WriteLine ("Child thread starts");} static void Main (string [] args) {/ / create a delegated instance of ThreadStart ThreadStart childref = new ThreadStart (CallToChildThread) Console.WriteLine ("In Main: Creating the Child thread"); / / create an instance of the Thread class Thread childThread = new Thread (childref); childThread.Start (); / / start a thread Console.ReadKey ();}

Running result:

ParameterizedThreadStart

Example:

Using System;using System.Threading;namespace MultithreadingApplication {class Program {static void Main (string [] args) {/ / create a thread delegate object ParameterizedThreadStart pts = new ParameterizedThreadStart (PrintEven); Console.WriteLine ("In Main: Creating the Child thread"); / / create a thread object Thread childThread = new Thread (pts) ChildThread.Start (10); Console.ReadKey ();} / / function running by thread / / print the even number private static void PrintEven (Object n) {Console.WriteLine ("Child thread started") in 0roomn; for (int item0; I)

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