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我正在开发MFC应用程序。 UI线程启动工作线程并在应用程序关闭时停止它。问题是每次尝试删除线程时,应用程序都会崩溃。删除线程时发生崩溃
这里是代码:
首先Thread类和它的实现:
class FileThread : public CWinThread
{
public:
static FileThread* CreateWorkerThread(LPVOID params, UINT priority, UINT flags);
void InitThread();
void StopThread();
inline HANDLE GetStopHandle() const { return m_stopThread; }
inline HANDLE GetWaitHandle() const { return m_waitThread; }
private:
HANDLE m_stopThread;
HANDLE m_waitThread;
FileThread(): m_stopThread(NULL), m_waitThread(NULL) { }
static UINT MyThreadProc(LPVOID pParam);
};
FileThread* FileThread::CreateWorkerThread(LPVOID params, UINT priority, UINT flags)
{
return (FileThread*) AfxBeginThread(FileThread::MyThreadProc, params, priority, 0, flags);
}
void FileThread::InitThread()
{
m_stopThread = CreateEvent(0, TRUE, FALSE, 0);
m_waitThread = CreateEvent(0, TRUE, FALSE, 0);
}
void FileThread::StopThread()
{
::SetEvent(m_stopThread);
::WaitForSingleObject(m_waitThread, INFINITE);
::CloseHandle(m_stopThread);
::CloseHandle(m_waitThread);
}
UINT FileThread::MyThreadProc(LPVOID pParam)
{
ThreadData* pLink = (ThreadData*)pParam;
BOOL continueProcess = TRUE;
int returnCode = EXITCODE_SUCCESS;
while (continueProcess)
{
if(::WaitForSingleObject(pLink->pMe->GetStopHandle(), 0) == WAIT_OBJECT_0)
{
::SetEvent(pLink->pMe->GetWaitHandle());
continueProcess = FALSE;
}
// the thread is looking for some files...
}
delete pLink; // it was allocated from the UI thread
return returnCode;
}
然后,在我启动线程:
ThreadData * td = new ThreadData();
m_myFileThread = FileThread::CreateWorkerThread((LPVOID)td, THREAD_PRIORITY_LOWEST, CREATE_SUSPENDED);
td->pMe = m_myFileThread;
m_myFileThread->m_bAutoDelete = FALSE;
m_myFileThread->InitThread();
m_myFileThread->ResumeThread();
最后,停止(与crash):
DWORD exitCode;
if (m_myFileThread != NULL && GetExitCodeThread(m_myFileThread->m_hThread, &exitCode) && (exitCode == STILL_ACTIVE))
{
m_myFileThread->StopThread();
if(::WaitForSingleObject(m_myFileThread->m_hThread, 5000) == WAIT_TIMEOUT)
{
TerminateThread(m_myFileThread->m_hThread, EXITCODE_ABORT);
}
}
if (m_myFileThread != NULL)
{
delete m_myFileThread; // => CRASH
}
看来我试图删除已经删除的内容并最终导致堆损坏。我尝试将m_bAutoDelete设置为TRUE,而不是通过我得到相同的崩溃来自己删除线程(当程序试图调用AfxEndThread时)。
线程终止其线程处理并返回退出代码。
下面的MSDN示例显示了如何做正确铸件 http://msdn.microsoft.com/en-us/library/z2h4xz23.aspx 同样的CWinThread具有自动删除机制:HTTP:// MSDN。 microsoft.com/en-us/library/4bbe9bte.aspx – odedsh
@adssh那么,创建一个UI线程,它有一个消息泵(需要套接字) - 它*可以*用作工作线程,但它可能在许多情况下有点矫枉过正。 –
@Roger Rowland:那是你认为的那种问题:“我认为那是愚蠢的?! ;) 非常感谢我将CWinThread包装在我的课堂中,一切都很好。 已解决的问题 – Jonyjack