class A
{
public:
        A();
virtual ~A();

private:
 std::shared_ptr<ThreadClass1> tc1;
}


class ThreadClass1
{
public:
    ThreadClass1();
virtual ~ThreadClass1();

private:
 std::thread fThread;
}


class CGenericLogger
        {
        public:
                        CGenericLogger();
            virtual     ~CGenericLogger();


        public:
            class CPrefixContext
            {
                friend class CGenericLogger;
            public:
                CPrefixContext(CGenericLogger& parent, const TXString& prefix) : fParent(parent) { fParent.farrPrefix.push_back( prefix ); }
                virtual ~CPrefixContext() { fParent.farrPrefix.pop_back(); }

            protected:
                CGenericLogger& fParent;
            };

        private:
            std::mutex          fFlushBarrier;
            TXStringSTLArray    farrPrefix;
        };


=============================
A.cpp

********************************
A::A()
{
    tc1.reset(new ThreadClass1());
}
********************************
============================


===============================
ThreadClass1.cpp:
********************************


std::shared_ptr<CGenericLogger> gLogger;
CBynarySemaphore    gThreadSemaphore;

ThreadClass1::ThreadClass1()
{
    gLogger.reset( new CGenericLogger() );
    fThread = std::thread(_DownloadThread);
}
ThreadClass1::~ThreadClass1()
{
    gThreadSemaphore.notify();
    fThread.join();
    gLogger.reset();
}

static void _DownloadThread()
{
    while(true)
    {
       gThreadSemaphore.wait();
       EThreadState     state = EThreadState::Idle;
        NNA_SCOPE {
            std::lock_guard<std::mutex> block_threads_until_finish_this_job( gThreadDataBarier );
            state = gThreadData->fState;
        }

        if ( state == EThreadState::Stop )
            break;
        else if ( state == EThreadState::NewData )
        {
		auto myLogger = gLogger;
        CGenericLogger::CPrefixContext loggerContext( *myLogger, "Something " );
        //do something;
       }
    }
}


********************************
===============================

======================================
Main.cpp
**************************************

A1 = A();
A2 = A();   // Application crashes at line 97 when A2 dilaog is closed.