badclass.cpp

Windows多线程编码随书源码

/*
 * BadClass.cpp
 *
 * Sample code for "Multitasking Applications in Win32"
 * This is from Chapter 9, Listing 9-2
 *
 * Shows the wrong way to try and start a thread
 * based on a class member function.
 *
 * THIS FILE IS NOT SUPPOSED TO COMPILE SUCCESSFULLY
 * You should get an error on line 51.
 *
 * Build this file with the command line:
 *
 *    cl /MD BadClass.cpp
 *
 */

#include <windows.h>
#include <stdio.h>
#include <process.h>

typedef unsigned (WINAPI *PBEGINTHREADEX_THREADFUNC)(
    LPVOID lpThreadParameter
    );
typedef unsigned *PBEGINTHREADEX_THREADID;


class ThreadObject
{
public:
    ThreadObject();
    void StartThread();
    virtual DWORD WINAPI ThreadFunc(LPVOID param);
    void WaitForExit();
private:
    HANDLE  m_hThread;
    DWORD m_ThreadId;
};

ThreadObject::ThreadObject()
{
    m_hThread = NULL;
    m_ThreadId = 0;
}

void ThreadObject::StartThread()
{
    m_hThread = (HANDLE)_beginthreadex(NULL,
                            0,
                            (PBEGINTHREADEX_THREADFUNC)ThreadFunc,
                            0,
                            0,
                            (PBEGINTHREADEX_THREADID)&m_ThreadId );
    if (m_hThread) {
        printf("Thread launched\n");
    }
}

void ThreadObject::WaitForExit()
{
    WaitForSingleObject(m_hThread, INFINITE);
    CloseHandle(m_hThread);
}

DWORD WINAPI ThreadObject::ThreadFunc(LPVOID param)
{
    // Do something useful ...

    return 0;
}

void main()
{
    ThreadObject obj;

    obj.StartThread();
    obj.WaitForExit();
}