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11.26.2008 at 09:29AM PST, ID: 23938040
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8.5

FreeLibrary hangs

Asked by Rongas in C / C++ / C# Editors and IDEs, C++ Programming Language, Microsoft Visual C++.Net, Microsoft Visual C++

Tags:

I am creating a dll that gets frames from an ip camera.  When i try to release the dll, the dll hangs.
What i have seen, is that the problem does not occur when CHttpFile connection does not occur (everything else are the same) by commenting the lines:

m_pFile = m_pServer->OpenRequest(CHttpConnection::HTTP_VERB_GET, m_getImageURL+(CString)m_numberofframes+"&"+(CString)temp+"&"+"compression=50",0,1,0,0,INTERNET_FLAG_NO_CACHE_WRITE);
if (m_pFile!=0)
{
   m_pFile->AddRequestHeaders(strPreFileData);
   BOOL response=m_pFile->SendRequest();
   m_pFile->QueryInfoStatusCode(m_dwRet);
   if ((int)m_dwRet==200 && response==1)
   {
      return 1;  
   }


When i delete the instance before freeing the resources, i close the CHttpFile as seen in the code attached. The request is for MJPeg (so the CHTTPFile does not finish by it self until i close it).
Can someone help me to make FreeLibrary((HMODULE)hinstLib); not to hang??  

I only have one instance of the dll class and no sharedmemory between exe and dll.
Any questions for clarification are more than welcomed.Start Free Trial 
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// Requesting mjpeg, m_pFile is the CHttpFile
....
m_pFile = m_pServer->OpenRequest(CHttpConnection::HTTP_VERB_GET, m_getImageURL+(CString)m_numberofframes+"&"+(CString)temp+"&"+"compression=50",0,1,0,0,INTERNET_FLAG_NO_CACHE_WRITE);
if (m_pFile!=0)
{
   m_pFile->AddRequestHeaders(strPreFileData);
   BOOL response=m_pFile->SendRequest();
   m_pFile->QueryInfoStatusCode(m_dwRet);
   if ((int)m_dwRet==200 && response==1)
   {
	return 1;   
   }
....
 
 
//Deleting Instance
...
	if(m_pFile!=NULL) 
	{
		//m_pFile->Abort();
		m_pFile->Remove(
		m_pFile->Close();
		delete m_pFile;
		m_pFile=0;
	}
...
 
// Releasing the dll
...
        DELETEPLUGIN DeletePlugin = (DELETEPLUGIN) GetProcAddress(hinstLib, TEXT("DeletePlugin"));
	DeletePlugin(testobj);
	if(hinstLib != NULL)
	FreeLibrary((HMODULE)hinstLib);
...
[+][-]11.29.2008 at 07:33PM PST, ID: 23061882

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[+][-]11.29.2008 at 09:20PM PST, ID: 23062048

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About this solution

Zones: C / C++ / C# Editors and IDEs, C++ Programming Language, Microsoft Visual C++.Net, Microsoft Visual C++
Tags: c++
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Solution Provided By: DanRollins
Participating Experts: 1
Solution Grade: A
 
 
[+][-]12.01.2008 at 12:55AM PST, ID: 23066957

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[+][-]12.01.2008 at 02:33AM PST, ID: 23067329

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[+][-]12.01.2008 at 02:36AM PST, ID: 23067342

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[+][-]12.02.2008 at 08:44AM PST, ID: 23078521

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