Re: static class member initialization

Victor Bazarov <v.bazarov@comcast.invalid>
Tue, 18 Dec 2012 21:14:54 -0500
On 12/18/2012 2:49 PM, Philipp Kraus wrote:

I have got a problem with the initialization of a static class member of
a singleton class.
The class shows (short) :

class myPluginUse {

    public :

         template<typename T> T myMethod();

   private :

        static myPluginUse* m_instance;


This class is used in the main program and I initialialize the static
member on the before the
main function. This works well, but this class is also used in a plugin
(DLL) but at the moment
I need a initialization of the static member also on the plugin, which
includes this header.

Huh? Two buts in a sentence - I am confused.

But the plugin cpp file needs only the public part of the class, not the
private or static member
or any implementation. I can "copy" the header part, but I don't want to
use two different files.

How can I use "one" header without a static initialization on my plugin
cpp and initialization on
my main program?


   // part for use in the DLL
   class myPluginForDLLUse
     virtual void foo() = 0; // interface
   myPluginForDLLUse* someStandAloneFunction();

   // part for use in your implementation, along with the other part
   class myPluginImplementation : public myPluginForDLLUse
     virtual void foo(); // this is where your functionality is

     // and all other stuff that your plugin needs at creation
   // implemenation of your stand-alone function
   myPluginForDLLUse* someStandAloneFunction()
     static myPluginImplementation myPlugin;
     return &myPlugin;

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