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参考 MFC 关于 CWinThread 的源代码

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线程的运行状态

1。线程正常情况下只有两种运行状态：running和exited。
2。如果想让线成退出，给线程状态位置THREAD_EXIT，如果线程已经退出，
则此标志位为THREAD_EXITED
3。如果线程已经运行，应该对标识位置THREAD_RUNNING
4。在线程运行过程中，应对线程标志位作出判断，如果为THREAD_EXIT，
应该修改标识位为THREAD_EXITED，然后return
5。如果一个现成还没有开始运行，则标志位为THREAD_NONE
****************************************************************/
const unsigned char THREAD_EXIT = 0;
const unsigned char THREAD_EXITED = 1;
const unsigned char THREAD_NONE = 2;
const unsigned char THREAD_RUNNING = 3;

const unsigned short THREAD_EXIT_LIMIT = 500; //等待线程退出的时间上限
const unsigned short THREAD_PERIOD = 20;

/****************************************************************
用户自己可以控制运行与中止的线程结构。
考虑到Scada程序中非常多的用到了多线程技术，就封装了线程处理方面的
数据和函数，让用户自己可以操作线程是否退出。
备注：如果一个程序退出的时候没有停止正在运行的线程，会产生内存泄漏！

使用参考：
THREAD m_thread; //定义一个线程

//定义线程所要处理的的函数，注意，此处不要有死循环，否则线成退出将失败
UINT ThreadProc(LPVOID lpParameter)
{
return TRUE;
}

//初始化线程
ThreadInit(&m_thread,ThreadProc,NULL,0,"线程使用示例");
//开启线程，线程开始后会一直运行，直到用户中止它！
ThreadBegin(&m_thread);
//退出线程
ThreadExit(&m_thread);

****************************************************************/
typedef struct tagTHREAD
{
char m_pszName[NAME_MAX_LEN];
UINT (*m_pfThreadProc)(LPVOID lpParameter);
LPVOID m_lpParameter;

UINT m_nThreadStatus;
HANDLE m_hThread;
UINT m_nExitTimeLimit;
}THREAD,*LPTHREAD;

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REALDB_API void ThreadInit(THREAD* lpThread,UINT (*m_pfThreadProc)(LPVOID),
LPVOID m_lpParameter,UINT nExitTimeLimit,char* pszThreadName)
{
ASSERT (lpThread != NULL);

lpThread->m_pfThreadProc = m_pfThreadProc;
lpThread->m_lpParameter = m_lpParameter;

if (nExitTimeLimit >= 10)
lpThread->m_nExitTimeLimit = nExitTimeLimit;
else
lpThread->m_nExitTimeLimit = THREAD_EXIT_LIMIT;

strcpy(lpThread->m_pszName ,pszThreadName);
lpThread->m_nThreadStatus = THREAD_NONE;
lpThread->m_hThread = NULL;
}

DWORD WINAPI ThreadRun(LPVOID lpParameter)
{
THREAD* lpThread = (THREAD*)lpParameter;
lpThread->m_nThreadStatus = THREAD_RUNNING;
while (TRUE)
{
if (lpThread->m_pfThreadProc == NULL ||
lpThread->m_nThreadStatus == THREAD_EXIT)
break;
else
{
(*(lpThread->m_pfThreadProc))(lpThread->m_lpParameter);
}
Sleep(THREAD_PERIOD);
}
lpThread->m_nThreadStatus = THREAD_EXITED;
lpThread->m_hThread = NULL;
return TRUE;
}

REALDB_API BOOL ThreadBegin(THREAD* lpThread)
{
ASSERT (lpThread != NULL);
DWORD dwThreadID;
lpThread->m_hThread = CreateThread(NULL,0,ThreadRun,
lpThread,0,&dwThreadID);
ASSERT (lpThread->m_hThread != NULL);
return TRUE;
}


REALDB_API BOOL ThreadExit(THREAD* lpThread)
{
ASSERT (lpThread != NULL);

if (lpThread->m_hThread != NULL && lpThread->m_nThreadStatus == THREAD_RUNNING)
{
lpThread->m_nThreadStatus = THREAD_EXIT;
UINT nTimePassed = 0;
while (lpThread->m_nThreadStatus != THREAD_EXITED)
{
Sleep (THREAD_PERIOD);
nTimePassed += THREAD_PERIOD;
if (nTimePassed >= lpThread->m_nExitTimeLimit )
{
LOG ("Error: %s退出超时！",lpThread->m_pszName );
ASSERT (FALSE);
break; //超时了就不等线成退出了
}
}
LOG ("Message: %s退出！",lpThread->m_pszName );
lpThread->m_nThreadStatus = THREAD_EXITED;
lpThread->m_hThread = NULL;
}
return TRUE;
}

__________________
借用达朗贝尔的名言：前进吧，你会得到信心!
[url="http://www.dimcax.com"]几何尺寸与公差标准[/url]