Use event to terminate a windows thread gracefully (MSDN sample)

EricYeung

于 2008-06-08 13:50:00 发布

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分类专栏： Multithread programming 文章标签： thread windows object signal null delete

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本文展示了一个简单的CEvent类使用案例。主线程创建一个CEvent实例并传递给子线程，通过设置事件来通知子线程执行特定操作，并等待子线程完成任务。

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// The following demonstrates trivial usage of the CEvent class.

// A CEvent object is created and passed as a parameter to another 

// thread.  The other thread will wait for the event to be signaled

// and then exit



void CEvent_Test()

{

   // Create the CEvent object that will be passed to the thread routine

   CEvent* pEvent = new CEvent( FALSE, FALSE );



   // Create a thread that will wait on the event

   CWinThread* pThread;

   pThread = ::AfxBeginThread( ThreadProc, pEvent, 0, 0, CREATE_SUSPENDED, NULL);

   pThread->m_bAutoDelete = FALSE; 

   pThread->ResumeThread();



   // Signal the thread to do the next work item

   pEvent->SetEvent();



   // Wait for the thread to consume the event and return

   ::WaitForSingleObject( pThread->m_hThread, INFINITE ); 

   delete pThread;

}



UINT __cdecl ThreadProc( LPVOID lpParameter )

{

   CEvent* pEvent = (CEvent*)( lpParameter );

   VERIFY( pEvent != NULL );



   // Wait for the event to be signaled

   ::WaitForSingleObject( pEvent->m_hObject, INFINITE );



   // Terminate the thread

    ::AfxEndThread( 0, FALSE ); 

   return 0L;

}