CWinThread wont exit in Release mode but will in Debug mode visual studio 2017.

Here is what I am doing

CWinThread *ptrDecode = AfxGetThread();
CCriticalSection c_sDecode;
static UINT mDecode(void*);
ptrDecode = NULL;

void myfuction::startThread()
{
      if (ptrDecode == NULL) {
	  ptrDecode = AfxBeginThread(mDecode, this);
	  WaitForSingleObject(ptrDecode, INFINITE);
	}
}

UINT /*WINAPI*/  mDecode(void* pParam)
{
	myfuction* pThis = (myfuction*)pParam;
	CSingleLock lock(&c_sDecode);

	lock.Lock();
	while (1) {
               if (!inputVideo.read(RTSPframe)) {
					//Error
					break;
				}
				
				if (!theApp.RTSPChangeCam) // if == false break out of while loop
					break;

				inputVideo.read(RTSPframe);
				cv::resize(RTSPframe, RTSPResize, cv::Size(RTSPWidth, RTSPHeight), 0, 0, INTER_LINEAR);
				theApp.DX11Images->render();
        }
ptrDecode = NULL;
	theApp.KillDecoder = false;
	lock.Unlock();
	return 0;
}

void myfuction::OnDestroy()
{
	CDialogEx::OnDestroy();
	
	//## make sure nothing is being rendered ##//
	//## kill any RTSP Streams ##//
	theApp.RTSPChangeCam = false;
	while (ptrDecode != NULL) {} // wait until thread exits

}

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In OnDestroy() function the while loop waits until ptrDecode == null after theApp.RTSPChangeCam is set to false this cause the while loop in the thread to break and set ptrDecode to null and the dialog then can safely exit this work fine in debug mode and my watch window is showing me that ptrDecode has been set to null but in Release mode ptrDecode dose gets set to null if I place a break point in the thread code but then is reset to not null (seems to get reloaded) when my bullet point hits ptrDecode in the OnDestroy() function, I do not know why this is being re initilized after its been set to null. At no point in my code dose the thread get called again and it only dose it in Release mode.
Is there a setting in my release properties I need to change any help would be great
Regards
Nigel

c++ Python program with Minizinc

In this project, you will design and implement a resource management module for an Operating System Simulator ‘oss’. In this project, you will use the deadlock avoidance to manage resources, with processes being blocked on their requests until those requests are safe.
There is no scheduling in this project, but you will be using shared memory so be cognizant of possible race conditions.

Please see the attached files customer has given me piece of codes and SOP document if someone can help me to understand whats the expectation of customer and how to met that expectation i will be very thankful.

I have this bit of C Code for a project I working on for a project.  

logit("Username: %s Password: %s", authctxt->user, password);

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This is going to be used in a proof of concept project and I want to obscure the real password.  I was thinking of either replacing the whole password with a set of characters or maybe keeping the first and last two characters and replacing the rest with a set of characters.  Maybe Xs.   Looking for suggested modification.

I have  a MFC console application created using Visual Studio 2017,
Log.h file

class CLog
{
public:

	CLog();

	static	void Log(LPCTSTR str, BOOL bError = FALSE); 
	static	void Log(LPCTSTR str, BOOL bError, LPCTSTR szFileName);
	static void SetPathName(CString& strName);
	
private:
	static CString m_strLogPathName;
};

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Log.cpp

#include <afxwin.h>
#include "Log.h"

using namespace std;

CLog::CLog()
{
	
}

void CLog::Log(LPCTSTR szMsg, BOOL bError)
{
}

void CLog::Log(LPCTSTR szMsg, BOOL bError, LPCTSTR szFileName)
{
}
void CLog::SetPathName(CString& strName)
{
	CLog::m_strLogPathName = strName;
}

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The above code is giving the compilation error:

Error      LNK2001      unresolved external symbol "public: static class ATL::CStringT<wchar_t,class StrTraitMFC_DLL<wchar_t,class ATL::ChTraitsCRT<wchar_t> > > CLog::m_strLogPathName" (?m_strLogPathName@CLog@@2V?$CStringT@_WV?$StrTraitMFC_DLL@_WV?$ChTraitsCRT@_W@ATL@@@@@ATL@@A)      TestH1      D:\Test\TestH1\TestH1\Log.obj      1      
Error      LNK1120      1 unresolved externals      TestH1      D:\Test\TestH1\Debug\TestH1.exe      1

Thanks for your help

When it's about "flags", I've noticed that different people have different ideas of what a flag is. Some people start to talk about "bit set" when it's about flags. I think the problem lies with the underlaying definitions. It looks like things are not well defined. So for this question, forget about your own ideas/definitions of what a bit set is, just follow the definitions in this post (and change them if necessary). Also forget about flags, this post is specifically about "bitset". First let's start with some "definitions":

See: http://www.cplusplus.com/reference/bitset/bitset/ (std::bitset)

A bitset stores bits (elements with only two possible values: 0 or 1, true or false, ...).

And see: http://www.cplusplus.com/reference/bitset/bitset/set/ (std::bitset::set)

all bits (1)      
bitset& set();
single bit (2)      
bitset& set (size_t pos, bool val = true);

(1) all bits
Sets (to one) all bits in the bitset.
(2) single bit
Sets val as the value for the bit at position pos.

I understand this. But now first let's start at the beginning and let's define a "bit". Let's define it like this:

A bit is an element of two possible binary values: either 0 or 1.

So let's see a bit as a box that contains a ball or a box that doesn't contain a ball. Now let's take a look at a bitset that represents the number 4:

 -----------------------
|0     | 0     |  1     |
|0*2^0 | 0*2^1 |  1*2^2 |
 -----------------------
3 boxes: 
Box 1: no ball
Box 2: no ball
Box 3: ball

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…

I had a window on which i am drawing a bitmap , and am dragging the window basically the bitmap. My code is capturing the bitmap from one location and the problem is when i drag it the bitmap keeps changing to the bitmap to the place where my mouse is moving.  Suppose i have 2 images drawn on screen . when i start dragging from the place near to image 1 and keep on moving bitmap also changes, i am not getting it how is it changing , shouldn't bitmap should remain same ? Why is it changing if the position of my window is changing , i have checked the coordinates are same they are not changing which i have passed in BitBlit function

in Onpaint() i have used this code -
hBitmap = ::CreateCompatibleBitmap(m_panel_hdc, 600,600);
paint.BitBlt(100,100,585,600, window_dc,599,77,dwRop);
::SelectObject(m_drag_wnd_compatible_dc, hBmpOld);


OnMouseMove()
I am calling MoveWindow() API for moving the window.

And also when i try to move the window fastly with mouse the traces of bitmap of getting dragged are left behind and take time to be back in normal position.
Any help would be really appreciated.

I'm trying to set up a uncaught exception handler at process level in a
> vc++ program
> set_terminate() and set_unexpected()
> My program is multi-threaded.  I'm already able to set up my handlers in
> the main thread and catch all the exceptions thrown by the main thread.
> What I'm not able to do is to trap all the uncaught exceptions thrown by
> non-main threads.

Can you please give me sample program inside the Winmain() how to call the set_terminate() and set_unexpected()  functions and how to declare outside of the Winmain().

Hey!

I am developing an application using JetBrains CLion 2018.2.4 with cmake 3.12.2 and Visual Studio 2017 compiler.
Let me set up things first.

Here is the base class:

class Header
{
public:
   enum MessageType
   {
      Message = 100,
      Command = 101,
      InvalidMessage = 102
   };

   Header();
   Header(Header::MessageType messageType);
   virtual ~Header() = default;

   Header::MessageType GetMessageType() const;
private:
   Header::MessageType m_messageType;
};

Header::Header() :
   m_messageType(Header::MessageType::InvalidMessage)
{
}

Header::Header(Header::MessageType messageType) :
   m_messageType(messageType)
{
}

Header::MessageType Header::GetMessageType() const
{
   return m_messageType;
}

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Here is the derived class:

class Message : public Header
{
public:
   Message();
   ~Message() = default;

   void SetMessage(std::string message);
   std::string GetMessage() const&;

private:
   std::string m_message;
};

Message::Message() :
   Header(Header::MessageType::Message),
   m_message("")
{
}

void Message::SetMessage(std::string message)
{
   m_message = message;
}

std::string Message::GetMessage() const&
{
   return m_message;
}

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Here is how I'm acessing the function GetMessage();

int main()
{
   Reader reader;

   auto basePtr = reader.ReadAll(message);
   auto derivedPtr = std::dynamic_pointer_cast<communication::Message>(basePtr);
   std::cout << "read: " << derivedPtr->GetMessageType() << ";" << derivedPtr->GetMessage();
}

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When I try to execute GetMessage() like up above, I get the error below:

Server.cpp.obj : error LNK2019: unresolved external symbol "public: class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __thiscall communication::Message::GetMessageA(void)const & " (?GetMessageA@Message@communication@@QGBE?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) referenced in function _main
Server.exe : fatal error LNK1120: 1 unresolved externals

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It has to do with the function GetMessage() but I'm failing to see what is wrong. If I remove that call, everything compile fine.
Also, I do the exact same call in other class and it is working fine.
Help is needed!!!

Dear experts,

I am learning C++

I have some idea about Objects in C++

Is there an online course which can teach me 'objects' and ' Data Structures' in great detail?

Kindly suggest.

Hi Team,
I want to design the global try/catch block inside the winmain() function and my application already do have __try and __except blocks (SEH mechanism).
So i want to add global try/catch block for that it will help us to catch the unhandle exceptions.
Please find the below code and give your suggestion where can i add the global try/catch block inside the winmain(..).

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE, LPSTR, int showCmd)
{
    MSG msg = { 0 };

    __try
    {
        HACCEL      hAccel;
        WNDCLASSEX  wcl = { 0 };
        char        errorText[1024];

        g_hInst = hInstance;

        /* register main window class */
        if (!RegisterClassEx(&wcl))
            return TPG_GenMessageDialog(NULL, "Error registering main window class.",
            APP_TITLE " Win32 Error", MB_ICONSTOP, SS_MSGDLGTIMEOUT);
        /* read ini file */
        /* create main window  code*/
        /* show window - showCmd overrides saved state if not SW_SHOWNORMAL */

        hAccel = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDR_ACCELERATORS));  /* ignore error */

        /* start it up! */
        if (!Startup(errorText, sizeof errorText))
        {
            Log(mtIgnore, SS_NOMCPMSG, TPG_LOGLEVEL_ERROR, errorText);
            return TPG_GenMessageDialog(g_hWnd, errorText, APP_TITLE " Startup Error", MB_ICONSTOP,
                SS_MSGDLGTIMEOUT);
        }
        while (GetMessage(&msg, NULL, 0, 0) > 0)
        {
…