如何终止等待对象的辅助线程

Question

我使用创建了一个辅助线程_beginthreadex.当进程想要停止时.它必须终止两个线程.问题是辅助线程正在等待一些句柄(使用WaitForSingleObject),主线程想要终止辅助线程.

主线程如何通知第二个线程停止WaitForSingleObject然后终止？

Answer 1

添加用于停止线程的新事件:

HANDLE hStopEvent;
hStopEvent = CreateEvent(NULL, TRUE, FALSE, NULL);

要阻止另一个线程:

SetEvent(hStopEvent);    // ask thread to stop
WaitForSingleObject(hThread, INFINITE);   // wait when thread stops

在线程代码中,替换WaitForSingleObject为WaitForMultipleObjects.等待退出事件+ hStopEvent.当hStopEvent发出信号,退出线程函数.

HANDLE hEvents[2];
hEvents[0] = <your existing event>;
hEvents[1] = hStopEvent;

for(;;)      // event handling loop
{
    DWORD dw = WaitForMultipleObjects(2, hEvents, FALSE, INFINITE);

    if ( dw == WAIT_OBJECT_0 )
    {
         // your current event handling code goes here
         // ...
    }
    else if ( dw == WAIT_OBJECT_0 + 1 )
    {
        // stop event is set, exit the loop and thread function
        break;
    }
}