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多线程编程10例(自动保存的).pdf

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1、1/25 1 VC 中多线程使用比较广泛而且实用,在网上看到的教程.感觉写的挺好.一、问题的提出编写一个耗时的单线程程序：新建一个基于对话框的应用程序SingleThread，在主对话框IDD_SINGLETHREAD_DIALOG添加一个按钮，ID 为 IDC_SLEEP_SIX_SECOND，标题为“延时 6 秒”，添加按钮的响应函数，代码如下：void CSingleThreadDlg:OnSleepSixSecond()Sleep(6000);/延时 6 秒编译并运行应用程序，单击“延时 6 秒”按钮，你就会发现在这6 秒期间程序就象“死机”一样，不在响应其它消息。为了更好地处理这种

2、耗时的操作，我们有必要学习多线程编程。二、多线程概述进程和线程都是操作系统的概念。进程是应用程序的执行实例，每个进程是由私有的虚拟地址空间、代码、数据和其它各种系统资源组成，进程在运行过程中创建的资源随着进程的终止而被销毁，所使用的系统资源在进程终止时被释放或关闭。线程是进程内部的一个执行单元。系统创建好进程后，实际上就启动执行了该进程的主执行线程，主执行线程以函数地址形式，比如说main或 WinMain函数，将程序的启动点提供给Windows系统。主执行线程终止了，进程也就随之终止。每一个进程至少有一个主执行线程，它无需由用户去主动创建，是由系统自动创建的。用户根据需要在应用程序中创建其

3、它线程，多个线程并发地运行于同一个进程中。一个进程中的所有线程都在该进程的虚拟地址空间中，共同使用这些虚拟地址空间、全局变量和系统资源，所以线程间的通讯非常方便，多线程技术的应用也较为广泛。多线程可以实现并行处理，避免了某项任务长时间占用CPU 时间。要说明的一点是，目前大多数的计算机都是单处理器（CPU）的，为了运行所有这些线程，操作系统为每个独立线程安排一些CPU 时间，操作系统以轮换方式向线程提供时间片，这就给人一种假象，好象这些线程都在2/25 2 同时运行。由此可见，如果两个非常活跃的线程为了抢夺对CPU 的控制权，在线程切换时会消耗很多的CPU 资源，反而会降低系统的性能。这一点在

4、多线程编程时应该注意。Win32 SDK函数支持进行多线程的程序设计，并提供了操作系统原理中的各种同步、互斥和临界区等操作。Visual C+6.0 中，使用MFC 类库也实现了多线程的程序设计，使得多线程编程更加方便。三、Win32 API对多线程编程的支持Win32 提供了一系列的API 函数来完成线程的创建、挂起、恢复、终结以及通信等工作。下面将选取其中的一些重要函数进行说明。1、HANDLE CreateThread(LPSECURITY_ATTRIBUTES lpThreadAttributes,DWORD dwStackSize,LPTHREAD_START_ROUTINE lpS

5、tartAddress,LPVOID lpParameter,DWORD dwCreationFlags,LPDWORD lpThreadId);该函数在其调用进程的进程空间里创建一个新的线程，并返回已建线程的句柄，其中各参数说明如下：lpThreadAttributes：指向一个SECURITY_ATTRIBUTES 结构的指针，该结构决定了线程的安全属性，一般置为NULL；dwStackSize：指定了线程的堆栈深度，一般都设置为0；lpStartAddress：表示新线程开始执行时代码所在函数的地址，即线程的起始地址。一般情况为(LPTHREAD_START_ROUTINE)Thread

6、Func，ThreadFunc 是线程函数名；lpParameter：指定了线程执行时传送给线程的32 位参数，即线程函数的参数；dwCreationFlags：控制线程创建的附加标志，可以取两种值。如果该参数为0，线程在被创建后就会立即开始执行；如果该参数为CREATE_SUSPENDED,则系统产生线程后，该线程处于挂起状态，并不马上执行，直至函数ResumeThread被调用；lpThreadId：该参数返回所创建线程的ID；如果创建成功则返回线程的句柄，否则返回NULL。2、DWORD SuspendThread(HANDLE hThread);该函数用于挂起指定的线程，如果函数执行成

7、功，则线程的执行被终止。3、DWORD ResumeThread(HANDLE hThread);该函数用于结束线程的挂起状态，执行线程。4、VOID ExitThread(DWORD dwExitCode);该函数用于线程终结自身的执行，主要在线程的执行函数中被调用。其中参数dwExitCode用来设置线程的退出码。5、BOOL TerminateThread(HANDLE hThread,DWORD dwExitCode);一般情况下，线程运行结束之后，线程函数正常返回，但是应用程序可以调用TerminateThread强行终止某一线程的执行。各参数含义如下文档编码:CH1C7W3V1V3

8、 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2

9、ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文

10、档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1

11、V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H

12、2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P

13、3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3

14、V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P33/25 3：hThread：将被终结的线程的句柄；dwExitCode：用于指定线程的退出码。使用 TerminateThread()终止某个线程的执行是不安全的，可能会引起系统不稳定；虽然该函数立即终止线程的执行，但并不释放线程所占用的资源。因此，一般不建议使用该函数。6、BOOL Post

15、ThreadMessage(DWORD idThread,UINT Msg,WPARAM wParam,LPARAM lParam);该函数将一条消息放入到指定线程的消息队列中，并且不等到消息被该线程处理时便返回。idThread：将接收消息的线程的ID；Msg：指定用来发送的消息；wParam：同消息有关的字参数；lParam：同消息有关的长参数；调用该函数时，如果即将接收消息的线程没有创建消息循环，则该函数执行失败。四、Win32 API多线程编程例程例程 1 MultiThread1 建立一个基于对话框的工程MultiThread1，在对话框IDD_MULTITHREAD1_DIALOG

16、中加入两个按钮和一个编辑框，两个按钮的ID 分别是 IDC_START，IDC_STOP，标题分别为“启动”，“停止”，IDC_STOP的属性选中Disabled；编辑框的ID 为 IDC_TIME，属性选中Read-only；在 MultiThread1Dlg.h文件中添加线程函数声明：void ThreadFunc();注意，线程函数的声明应在类CMultiThread1Dlg的外部。在类 CMultiThread1Dlg内部添加protected型变量：HANDLE hThread;DWORD ThreadID;分别代表线程的句柄和ID。在 MultiThread1Dlg.cpp文件中添

17、加全局变量m_bRun：volatile BOOL m_bRun;m_bRun 代表线程是否正在运行。你要留意到全局变量m_bRun 是使用volatile 修饰符的，volatile 修饰符的作用是告诉编译器无需对该变量作任何的优化，即无需将它放到一个寄存器中，并且该值可被外部改变。对于多线程引用的全局变量来说，volatile 是一个非常重要的修饰符。编写线程函数：void ThreadFunc()文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V

18、3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2

19、 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3

20、文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V

21、1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1

22、H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7

23、P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W

24、3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P34/25 4 CTime time;CString strTime;m_bRun=TRUE;while(m_bRun)time=CTime:GetCurrentTime();strTime=time.Format(%H:%M:%S);:SetDlgItemText(AfxGetMainWnd()-m_hWnd,IDC_TIME,strTime);Sleep(1000);该线程函数没有参数，也不返回函数值。只要m_bRun为 TRUE，线程一直运行。双击

25、IDC_START按钮，完成该按钮的消息函数：void CMultiThread1Dlg:OnStart()/TODO:Add your control notification handler code here hThread=CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)ThreadFunc,NULL,0,&ThreadID);GetDlgItem(IDC_START)-EnableWindow(FALSE);GetDlgItem(IDC_STOP)-EnableWindow(TRUE);双击 IDC_STOP按钮，完成该按钮的消息函数：void

26、 CMultiThread1Dlg:OnStop()/TODO:Add your control notification handler code here m_bRun=FALSE;GetDlgItem(IDC_START)-EnableWindow(TRUE);GetDlgItem(IDC_STOP)-EnableWindow(FALSE);编译并运行该例程，体会使用Win32 API编写的多线程。例程 2 MultiThread2 该线程演示了如何传送一个一个整型的参数到一个线程中，以及如何等待一个线程完成处理。建立一个基于对话框的工程MultiThread2，在对话框IDD_MULT

27、ITHREAD2_DIALOG中加入一个编辑框和一个按钮，ID 分别是 IDC_COUNT，IDC_START，按钮控件的标题为“开始”；在 MultiThread2Dlg.h文件中添加线程函数声明：void ThreadFunc(int integer);注意，线程函数的声明应在类CMultiThread2Dlg的外部。在类 CMultiThread2Dlg内部添加 protected型变量:HANDLE hThread;DWORD ThreadID;文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 Z

28、J6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档

29、编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V

30、3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2

31、 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3

32、文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V

33、1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1

34、H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P35/25 5 分别代表线程的句柄和ID。打开 ClassWizard，为编辑框IDC_COUNT添加 int 型变量 m_nCount。在MultiThread2Dlg.cpp文件中添加：void ThreadFunc(int integer)int i;for(i=0;iEnableWindow(FALSE);WaitForSingleObject(hThread,INFINITE);GetDlgIt

35、em(IDC_START)-EnableWindow(TRUE);顺便说一下WaitForSingleObject函数，其函数原型为：DWORD WaitForSingleObject(HANDLE hHandle,DWORD dwMilliseconds);hHandle为要监视的对象（一般为同步对象，也可以是线程）的句柄；dwMilliseconds为 hHandle对象所设置的超时值，单位为毫秒；当在某一线程中调用该函数时，线程暂时挂起，系统监视hHandle所指向的对象的状态。如果在挂起的dwMilliseconds毫秒内，线程所等待的对象变为有信号状态，则该函数立即返回；如果超时时间

36、已经到达dwMilliseconds毫秒，但hHandle所指向的对象还没有变成有信号状态，函数照样返回。参数dwMilliseconds有两个具有特殊意义的值：0 和 INFINITE。若为 0，则该函数立即返回；若为INFINITE，则线程一直被挂起，直到 hHandle所指向的对象变为有信号状态时为止。本例程调用该函数的作用是按下IDC_START按钮后，一直等到线程返回，再恢复IDC_START按钮正常状态。编译运行该例程并细心体会。文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y

37、7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1

38、C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V

39、3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z1

40、0Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:C

41、H1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS

42、9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6

43、Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P36/25 6 例程 3 MultiThread3 传送一个结构体给一个线程函数也是可能的，可以通过传送一个指向结构体的指针参数来完成。先定义一个结构体：typedef struct int firstArgu,long secondArgu,myType,*pMyType;创建线程时CreateThread(NULL,0,threadFunc,pMyType,);在 threadFunc函数内部，可以使用“强制转换

44、”：int intValue=(pMyType)lpvoid)-firstArgu;long longValue=(pMyType)lpvoid)-seconddArgu;例程 3 MultiThread3将演示如何传送一个指向结构体的指针参数。建立一个基于对话框的工程MultiThread3，在对话框IDD_MULTITHREAD3_DIALOG中加入一个编辑框IDC_MILLISECOND，一个按钮IDC_START，标题为“开始”，一个进度条IDC_PROGRESS1；打开 ClassWizard，为编辑框IDC_MILLISECOND添加 int型变量 m_nMilliSecond，为

45、进度条 IDC_PROGRESS1添加 CProgressCtrl型变量m_ctrlProgress；在 MultiThread3Dlg.h文件中添加一个结构的定义：struct threadInfo UINT nMilliSecond;CProgressCtrl*pctrlProgress;线程函数的声明：UINT ThreadFunc(LPVOID lpParam);注意，二者应在类CMultiThread3Dlg的外部。在类 CMultiThread3Dlg内部添加 protected型变量:HANDLE hThread;DWORD ThreadID;分别代表线程的句柄和ID。在 Mul

46、tiThread3Dlg.cpp文件中进行如下操作：定义公共变量threadInfo Info；双击按钮IDC_START，添加相应消息处理函数：void CMultiThread3Dlg:OnStart()/TODO:Add your control notification handler code here UpdateData(TRUE);Info.nMilliSecond=m_nMilliSecond;Info.pctrlProgress=&m_ctrlProgress;hThread=CreateThread(NULL,文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ

47、6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编

48、码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3

49、 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2

50、ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文档编码:CH1C7W3V1V3 HS9V3M1L1H2 ZJ6Z10Y7Z7P3文

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