Executing C++ before and after main()

[jpujolf]

I'm writing a C++ component that brings some requirements and after intense web browsing I did no find any clue...

[*]How to make some pieces of code called before main() and also static constructors?[*]How to make some pieces of code called after main() and also static destructors?

I've made this trick :

// GlobalClass.h
 
class GlobalClass
{
  static GlobalClass * m_Instance;
  public :
    GlobalClass();
    ~GlobalClass();
 
   // here stuff, if needed...
};

// GlobalClass.h

class GlobalClass
{
  static GlobalClass * m_Instance;
  public :
    GlobalClass();
    ~GlobalClass();

   // here stuff, if needed...
};

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// GlobalClass.cpp
 
GlobalClass * GlobalClass::m_Instances = 0;
 
GlobalClass::GlobalClass ()
{
  // To avoid dlouble execution...
  assert ( m_Instance );
  m_Instance = this;
  // Before main stuff
  ...
}
 
GlobalClass::GlobalClass ()
{
  m_Instance = 0;
  // After main stuff
  ...
}

// GlobalClass.cpp

GlobalClass * GlobalClass::m_Instances = 0;

GlobalClass::GlobalClass ()
{
  // To avoid dlouble execution...
  assert ( m_Instance );
  m_Instance = this;
  // Before main stuff
  ...
}

GlobalClass::GlobalClass ()
{
  m_Instance = 0;
  // After main stuff
  ...
}

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GlobalClass GLOBALSTUFF;
 
int main ( int argc, char *argv[] )
{
  // Here your code...
}

GlobalClass GLOBALSTUFF;

int main ( int argc, char *argv[] )
{
  // Here your code...
}

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[*]How to ensure that this hack is portable?[/LIST]

I think that's portable...

Thanks in advance for your help.

Not at all, if I hope this was useful for you...