Questions about ending threads

weekice

Excuse me, I want to download a file. During the download process, I want to end the thread halfway and use TerminateThread (); but Downloadfile.close () has not run yet.
UINT Download (void * pArg)
{
        CFile DownloadFile;
DownloadFile.Open (strDirectory, CFile :: modeCreate | CFile :: modeWrite | CFile :: modeNoTruncate);

while (nCompletedSize <nFileSize)
{


nReceSize = HttpSocket.Receive (pData, 1024);
DownloadFile.Write (pData, nReceSize);
nCompletedSize + = nReceSize;
Ranch
}
DownloadFile.Close ();
}

food0012

Add a flag condition in while, set the value to be exited in the main thread, and wait

weekice

Because it often runs to HttpSocket.Receive (pData, 1024); it will get stuck there, so I use forced exit, is there any good way?

huyaobin

Because it often runs to HttpSocket.Receive (pData, 1024); it will get stuck there, so I use forced exit, is there any good way?

-------------------------------------------------- -----------
Stuck there because your revive is still waiting to be accepted, but the server does not have a send corresponding to it, so it has been "stuck" there, and your code for receiving files should be a bit problematic. This is not a problem that forced exit can solve.

weekice

No, receive does not get stuck under normal circumstances, I think it is when the receive card makes him quit at that time, the issue of receive is not discussed here

weekice

It is normal to receive here, and it will only get stuck in special times. Here, we will not discuss the receive problem, but just how to solve the problem that did not close Downloadfile.close ()

googstj

For forced exit, you can use endThread. This function is also used in the thread. However, this method is not recommended.
Generally use TerminateThread ();
Here are two functions for your reference:
void MyThread :: WaitForThreadToTerminate (HANDLE hThread) // Wait for the thread to terminate
{
DWORD dwRet;
do
{
dwRet = :: MsgWaitForMultipleObjects (1,&hThread, FALSE,
INFINITE, QS_ALLINPUT);
if (dwRet! = WAIT_OBJECT_0)
{
PeekMessageLoop ();
}
} while ((dwRet! = WAIT_OBJECT_0)&&(dwRet! = WAIT_FAILED));
}

void MyThread :: PeekMessageLoop ()
{
MSG msg;
while (PeekMessage (&msg, NULL, NULL, NULL, PM_REMOVE))
{
TranslateMessage (&msg);
DispatchMessage (&msg);
}
}




MyThread :: ~ MyThread ()
{

EndThread_Proc ();
if (bEndTDde)
{
WaitForThreadToTerminate (pMyThread-> m_hThread);
}

}

void MyThread :: EndThread_Proc ()
{
bEndTDde = True;
}

CWinThread * pMyThread;
BOOL bEndTDde;

I hope useful to you.

weekice

Thank you upstairs, but how do I solve the problem that did not turn off downloadfile.close ()

weekice

Sorry, the front is not Receive, it should be .recv(); I heard that it is caused by blocking mode, how to solve it?

googstj

The threads in my code wait until the resources are used up before ending.
At the end you modify the condition of while(nCompletedSize <nFileSize), the program should be able to execute to DownloadFile.Close();
But you may need to use try catch to handle the error.