ProvideNumericId.h

Go to the documentation of this file.

/*---------------------------------------------------------------------\
|                          ____ _   __ __ ___                          |
|                         |__  / \ / / . \ . \                         |
|                           / / \ V /|  _/  _/                         |
|                          / /__ | | | | | |                           |
|                         /_____||_| |_| |_|                           |
|                                                                      |
\---------------------------------------------------------------------*/
#ifndef ZYPP_BASE_PROVIDENUMERICID_H
#define ZYPP_BASE_PROVIDENUMERICID_H
 
namespace zypp
{ 
  namespace base
  { 
 
    //
    //  CLASS NAME : ProvideNumericId
    //
    template<class TDerived, class TNumericIdType>
      struct ProvideNumericId
      {
      public:
        TNumericIdType numericId() const
        { return _numericId; }
 
      protected:
        ProvideNumericId()
        : _numericId( nextId() )
        {}
        ProvideNumericId( const ProvideNumericId & /*rhs*/ )
        : _numericId( nextId() )
        {}
        ProvideNumericId & operator=( const ProvideNumericId & /*rhs*/ )
        { return *this; }
        ~ProvideNumericId()
        {}
      protected:
        ProvideNumericId( const void *const )
        : _numericId( 0 )
        {}
      private:
        static TNumericIdType nextId()
        {
          static TNumericIdType _staticCounter = 0;
          // Assert not returning 0
          return ++_staticCounter;
        }
        const TNumericIdType _numericId;
      };
 
  } // namespace base
} // namespace zypp
#endif // ZYPP_BASE_PROVIDENUMERICID_H