稳扎稳打Silverlight(26) - 2.0线程之Lock, Interlocked, EventWaitHandle, Monitor, ThreadStaticAttribute_app

概述[索引页] [源码下载] 稳扎稳打Silverlight(26) - 2.0线程之Lock, Interlocked, EventWaitHandle, Monitor, ThreadStaticAttribute 作者： webabcd 介绍 Silverlight 2.0 使用Lock, Interlocked, EventWaitHandle, Monitor来实现线程同步     Lock [索引页]
[源码下载]

稳扎稳打Silverlight(26) - 2.0线程之Lock,Interlocked,EventWaitHandle,Monitor,ThreadStaticAttribute

作者： webabcd

介绍
Silverlight 2.0 使用Lock,Monitor来实现线程同步
    Lock - 确保代码块完成运行，而不会被其他线程中断
    Interlocked - 为多个线程共享的变量提供原子级的 *** 作
    EventWaitHandle - 通知其他线程是否可入的类
    Monitor - 提供同步访问对象的机制
    ThreadStaticAttribute - 所指定的静态变量对每个线程都是唯一的

在线DEMO
http://www.cnblogs.com/webabcd/archive/2008/10/09/1307486.html

示例
1、Lock.xaml

< UserControl x:Class ="Silverlight20.Thread.Lock"

xmlns ="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x ="http://schemas.microsoft.com/winfx/2006/xaml" >

< StackPanel HorizontalAlignment ="left" margin ="5" >

< TextBlock x:name ="txtMsg" />

</ StackPanel >

</ UserControl >

Lock.xaml.cs

using System;

using System.Collections.Generic;

using System.linq;

using System.Net;

using System.windows;

using System.windows.Controls;

using System.windows.documents;

using System.windows.input;

using System.windows.Media;

using System.windows.Media.Animation;

using System.windows.Shapes;

namespace Silverlight20.Thread

{

public partial class Lock : UserControl

{

@H_480_301@//@H_480_301@ 需要被 lock 的静态变量@H_480_301@

private static Readonly object objLock = new object();

private static int i;

public Lock()

{

InitializeComponent();

i = @H_390_404@0;

for (int x = @H_390_404@0; x < @H_390_404@100; x++)

{

@H_480_301@//@H_480_301@ 开 100 个线程去 *** 作静态变量 i@H_480_301@

System.Threading.Thread thread = new System.Threading.Thread(new System.Threading.ThreadStart(DoWork));

thread.Start();

}

System.Threading.Thread.Sleep(@H_390_404@3000);

@H_480_301@//@H_480_301@ 3 秒后 100 个线程都应该执行完毕了，取得 i 的结果

@H_480_301@//@H_480_301@ 做了并发处理的结果为 100 ，去掉 lock 可得到不做并发处理的结果@H_480_301@

txtMsg.Text = i.ToString();

}

private voID DoWork()

{

try

{

@H_480_301@//@H_480_301@ lock() - 确保代码块完成运行，而不会被其他线程中断。其参数必须为一个引用类型的对象@H_480_301@

lock (objLock)

{

int j = i + @H_390_404@1;

@H_480_301@//@H_480_301@ 模拟多线程并发 *** 作静态变量 i 的情况@H_480_301@

System.Threading.Thread.Sleep(@H_390_404@10);

i = j;

}

finally

{

@H_480_301@//@H_480_301@ code@H_480_301@

}

2、Interlocked.xaml

< UserControl x:Class ="Silverlight20.Thread.Interlocked"

xmlns ="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x ="http://schemas.microsoft.com/winfx/2006/xaml" >

< StackPanel HorizontalAlignment ="left" margin ="5" >

< TextBlock x:name ="txtMsg" />

</ StackPanel >

</ UserControl >

Interlocked.xaml.cs

using System;

using System.Collections.Generic;

using System.linq;

using System.Net;

using System.windows;

using System.windows.Controls;

using System.windows.documents;

using System.windows.input;

using System.windows.Media;

using System.windows.Media.Animation;

using System.windows.Shapes;

namespace Silverlight20.Thread

{

public partial class Interlocked : UserControl

{

private static int i;

public Interlocked()

{

InitializeComponent();

i = @H_390_404@0;

for (int x = @H_390_404@0; x < @H_390_404@100; x++)

{

@H_480_301@//@H_480_301@ 开 100 个线程去 *** 作静态变量 i@H_480_301@

System.Threading.Thread thread = new System.Threading.Thread(new System.Threading.ThreadStart(DoWork));

thread.Start();

}

System.Threading.Thread.Sleep(@H_390_404@1000);

@H_480_301@//@H_480_301@ 1 秒后 100 个线程都应该执行完毕了，取得 i 的结果@H_480_301@

txtMsg.Text = i.ToString();

}

private voID DoWork()

{

try

{

@H_480_301@//@H_480_301@ Interlocked - 为多个线程共享的变量提供原子级的 *** 作（避免并发问题）

@H_480_301@//@H_480_301@ i 加 1@H_480_301@

System.Threading.Interlocked.Increment(ref i);

@H_480_301@//@H_480_301@ i 减 1@H_480_301@

System.Threading.Interlocked.Decrement(ref i);

@H_480_301@//@H_480_301@ i 加 1@H_480_301@

System.Threading.Interlocked.Add(ref i, @H_390_404@1);

@H_480_301@//@H_480_301@ 如果 i 等于 100 ，则将 i 赋值为 101@H_480_301@

System.Threading.Interlocked.CompareExchange(ref i, @H_390_404@101, @H_390_404@100);

@H_480_301@//@H_480_301@ 将 i 赋值为 1000

@H_480_301@//@H_480_301@ System.Threading.Interlocked.Exchange(ref i, 1000);@H_480_301@

}

finally

{

@H_480_301@//@H_480_301@ code@H_480_301@

}

3、EventWaitHandle.xaml

< UserControl x:Class ="Silverlight20.Thread.EventWaitHandle"

xmlns ="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x ="http://schemas.microsoft.com/winfx/2006/xaml" >

< StackPanel HorizontalAlignment ="left" margin ="5" >

< TextBlock x:name ="txtautoresetEvent" />

< TextBlock x:name ="txtManualresetEvent" />

</ StackPanel >

</ UserControl >

EventWaitHandle.xaml.cs

using System;

using System.Collections.Generic;

using System.linq;

using System.Net;

using System.windows;

using System.windows.Controls;

using System.windows.documents;

using System.windows.input;

using System.windows.Media;

using System.windows.Media.Animation;

using System.windows.Shapes;

namespace Silverlight20.Thread

{

public partial class EventWaitHandle : UserControl

{

@H_480_301@//@H_480_301@ autoresetEvent(bool state) - 通知其他线程是否可入的类，自动 reset()

@H_480_301@//@H_480_301@ bool state - 是否为终止状态，即是否禁止其他线程入内@H_480_301@

private System.Threading.autoresetEvent autoresetEvent =

new System.Threading.autoresetEvent(false);

@H_480_301@//@H_480_301@ ManualresetEvent(bool state) - 通知其他线程是否可入的类，手动 reset()

@H_480_301@//@H_480_301@ bool state - 是否为终止状态，即是否禁止其他线程入内@H_480_301@

private System.Threading.ManualresetEvent manualresetEvent =

new System.Threading.ManualresetEvent(false);

private static int i;

public EventWaitHandle()

{

InitializeComponent();

@H_480_301@//@H_480_301@ 演示 autoresetEvent@H_480_301@

autoresetEventDemo();

@H_480_301@//@H_480_301@ 演示 ManualresetEvent@H_480_301@

ManualresetEventDemo();

}

private voID autoresetEventDemo()

{

i = @H_390_404@0;

for (int x = @H_390_404@0; x < @H_390_404@100; x++)

{

@H_480_301@//@H_480_301@ 开 100 个线程去 *** 作静态变量 i@H_480_301@

System.Threading.Thread thread =

new System.Threading.Thread(new System.Threading.ThreadStart(autoresetEventDemoCallback));

thread.Start();

@H_480_301@//@H_480_301@ 阻塞当前线程，直到 autoresetEvent 发出 Set() 信号@H_480_301@

autoresetEvent.WaitOne();

}

System.Threading.Thread.Sleep(@H_390_404@1000);

@H_480_301@//@H_480_301@ 1 秒后 100 个线程都应该执行完毕了，取得 i 的结果@H_480_301@

txtautoresetEvent.Text = i.ToString();

}

private voID autoresetEventDemoCallback()

{

try

@H_403_2223@

{

int j = i + @H_390_404@1;

@H_480_301@//@H_480_301@ 模拟多线程并发 *** 作静态变量 i 的情况@H_480_301@

System.Threading.Thread.Sleep(@H_390_404@5);

i = j;

}

finally

{

@H_480_301@//@H_480_301@ 发出 Set() 信号，以释放 autoresetEvent 所阻塞的线程@H_480_301@

autoresetEvent.Set();

}

private voID ManualresetEventDemo()

{

i = @H_390_404@0;

for (int x = @H_390_404@0; x < @H_390_404@100; x++)

{

@H_480_301@//@H_480_301@ reset() - 将 ManualresetEvent 变为非终止状态，即由此线程控制 ManualresetEvent，

@H_480_301@//@H_480_301@ 其他线程排队，直到 ManualresetEvent 发出 Set() 信号（autoresetEvent 在 Set() 时会自动 reset()）@H_480_301@

manualresetEvent.reset();

@H_480_301@//@H_480_301@ 开 100 个线程去 *** 作静态变量 i@H_480_301@

System.Threading.Thread thread =

new System.Threading.Thread(new System.Threading.ThreadStart(ManualresetEventDemoCallback));

thread.Start();

@H_480_301@//@H_480_301@ 阻塞当前线程，直到 ManualresetEvent 发出 Set() 信号@H_480_301@

manualresetEvent.WaitOne();

}

System.Threading.Thread.Sleep(@H_390_404@1000);

@H_480_301@//@H_480_301@ 1 秒后 100 个线程都应该执行完毕了，取得 i 的结果@H_480_301@

txtManualresetEvent.Text = i.ToString();

}

private voID ManualresetEventDemoCallback()

{

try

{

int j = i + @H_390_404@1;

@H_480_301@//@H_480_301@ 模拟多线程并发 *** 作静态变量 i 的情况@H_480_301@

System.Threading.Thread.Sleep(@H_390_404@5);

i = j;

}

finally

{

@H_480_301@//@H_480_301@ 发出 Set() 信号，以释放 ManualresetEvent 所阻塞的线程，同时 ManualresetEvent 变为终止状态）@H_480_301@

manualresetEvent.Set();

}

4、Monitor.xaml

< UserControl x:Class ="Silverlight20.Thread.Monitor"

xmlns ="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x ="http://schemas.microsoft.com/winfx/2006/xaml" >

< StackPanel HorizontalAlignment ="left" margin ="5" >

< TextBlock x:name ="txtMsg" />

</ StackPanel >

</ UserControl >

Monitor.xaml.cs

using System;

using System.Collections.Generic;

using System.linq;

using System.Net;

using System.windows;

using System.windows.Controls;

using System.windows.documents;

using System.windows.input;

using System.windows.Media;

using System.windows.Media.Animation;

using System.windows.Shapes;

namespace Silverlight20.Thread

{

public partial class Monitor : UserControl

@H_844_3018@

{

private static Readonly object objLock = new object();

private static int i;

public Monitor()

{

InitializeComponent();

i = @H_390_404@0;

for (int x = @H_390_404@0; x < @H_390_404@100; x++)

{

@H_480_301@//@H_480_301@ 开 100 个线程去 *** 作静态变量 i@H_480_301@

System.Threading.Thread thread = new System.Threading.Thread(new System.Threading.ThreadStart(DoWork));

thread.Start();

}

System.Threading.Thread.Sleep(@H_390_404@1000);

@H_480_301@//@H_480_301@ 1 秒后 100 个线程都应该执行完毕了，取得 i 的结果@H_480_301@

txtMsg.Text = i.ToString();

}

private voID DoWork()

{

try

{

@H_480_301@//@H_480_301@ Monitor - 提供同步访问对象的机制

@H_480_301@//@H_480_301@ Enter() - 在指定对象上获取排他锁@H_480_301@

System.Threading.Monitor.Enter(objLock);

int j = i + @H_390_404@1;

@H_480_301@//@H_480_301@ 模拟多线程并发 *** 作静态变量 i 的情况@H_480_301@

System.Threading.Thread.Sleep(@H_390_404@5);

i = j;

@H_480_301@//@H_480_301@ Exit() - 释放指定对象上的排他锁@H_480_301@

System.Threading.Monitor.Exit(objLock);

}

finally

{

@H_480_301@//@H_480_301@ code@H_480_301@

}

}

5、ThreadStaticAttribute.xaml

< UserControl x:Class ="Silverlight20.Thread.ThreadStaticAttribute"

xmlns ="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x ="http://schemas.microsoft.com/winfx/2006/xaml" >

< StackPanel HorizontalAlignment ="left" margin ="5" >

< TextBlock x:name ="txtMsg" />

< TextBlock x:name ="txtMsg2" />

</ StackPanel >

</ UserControl >

ThreadStaticAttribute.xaml.cs

using System;

using System.Collections.Generic;

using System.linq;

using System.Net;

using System.windows;

using System.windows.Controls;

using System.windows.documents;

using System.windows.input;

using System.windows.Media;

using System.windows.Media.Animation;

using System.windows.Shapes;

namespace Silverlight20.Thread

{

public partial class ThreadStaticAttribute : UserControl

{

@H_480_301@//@H_480_301@ ThreadStatic - 所指定的静态变量对每个线程都是唯一的@H_480_301@

[System.ThreadStatic]

private static int value;

@H_480_301@//@H_480_301@ 一般的静态变量，对每个线程都是共用的@H_480_301@

private static int value2;

public ThreadStaticAttribute()

{

InitializeComponent();

Demo();

}

voID Demo()

{

System.Threading.Thread thread = new System.Threading.Thread(DoWork);

thread.name = "线程1";

thread.Start();

System.Threading.Thread.Sleep(@H_390_404@100);

System.Threading.Thread thread2 = new System.Threading.Thread(DoWork2);

thread2.name = "线程2";

thread2.Start();

}

voID DoWork()

{

for (int i = @H_390_404@0; i < @H_390_404@10; i++)

{

@H_480_301@//@H_480_301@ 线程1对静态变量的 *** 作@H_480_301@

value++;

value2++;

}

string s = value.ToString(); @H_480_301@//@H_480_301@ value - 本线程独有的静态变量@H_480_301@

string s2 = value2.ToString(); @H_480_301@//@H_480_301@ value2 - 所有线程共用的静态变量@H_480_301@

this.dispatcher.BeginInvoke(delegate

{ txtMsg.Text = s + " - " + s2; });

@H_480_301@//@H_480_301@ this.dispatcher.BeginInvoke(delegate { txtMsg.Text = value + " - " + value2; }); @H_480_301@//@H_480_301@ 在UI线程上调用，所以value值为UI线程上的value值，即 0 @H_480_301@

}

voID DoWork2()

{

for (int i = @H_390_404@0; i < @H_390_404@10; i++)

{

@H_480_301@//@H_480_301@ 线程2对静态变量的 *** 作@H_480_301@

value++;

value2++;

}

string s = value.ToString(); @H_480_301@//@H_480_301@ value - 本线程独有的静态变量@H_480_301@

string s2 = value2.ToString(); @H_480_301@//@H_480_301@ value2 - 所有线程共用的静态变量@H_480_301@

this.dispatcher.BeginInvoke(delegate @H_688_4403@

{ txtMsg2.Text = s + " - " + s2; });

@H_480_301@//@H_480_301@ this.dispatcher.BeginInvoke(delegate { txtMsg2.Text = value + " - " + value2; }); @H_480_301@//@H_480_301@ 在UI线程上调用，所以value值为UI线程上的value值，即 0 @H_480_301@

}

OK
[源码下载] 总结

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