source: GTP/trunk/Lib/Illum/IBRBillboardCloudTrees/OGRE/include/OBA/OBASingleton.h @ 721

#ifndef __OBASINGLETON_H__
#define __OBASINGLETON_H__

namespace OBA {


template <typename T> class _OBAExport CSingleton
{
    protected:

        static T* ms_Singleton;

    public:
        CSingleton( void )
        {
            assert( !ms_Singleton );
#if defined( _MSC_VER ) && _MSC_VER < 1200       
            int offset = (int)(T*)1 - (int)(CSingleton <T>*)(T*)1;
            ms_Singleton = (T*)((int)this + offset);
#else
            ms_Singleton = static_cast< T* >( this );
#endif
        }
        ~CSingleton( void )
            {  assert( ms_Singleton );  ms_Singleton = 0;  }
        static T& getSingleton( void )
                {       assert( ms_Singleton );  return ( *ms_Singleton ); }
        static T* getSingletonPtr( void )
                { return ms_Singleton; }
};


}

#endif // ! defined __SINGLETON_H__