PhxSingleton.h

#ifndef PHX_SINGLETON_H
#define PHX_SINGLETON_H

#if PHX_COMPILER == COMPILER_MSVC
// Turn off warnings generated by this singleton implementation
#   pragma warning (disable : 4311)
#   pragma warning (disable : 4312)
#endif

namespace Phx {
        template <typename T> class PhxSingleton
        {
        protected:

                static T* ms_Singleton;

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

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