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#ifndef SINGLETON_H
#define SINGLETON_H
template <class Product>
struct DefaultSingletonCreator
{
static Product *create() { return new Product; }
};
template <class Product>
struct NullSingletonCreator
{
static Product *create() { return 0; }
};
template
<
class T,
template <class> class Creator = DefaultSingletonCreator
>
class Singleton
{
public:
static T &self()
{
if ( !s_self )
s_self = Creator<T>::create();
return *s_self;
}
protected:
Singleton()
{ s_self = static_cast<T *>( this ); }
~Singleton()
{ s_self = 0; }
private:
Singleton( const Singleton<T, Creator> &rhs );
Singleton<T, Creator> &operator=( const Singleton<T, Creator> &rhs );
static T *s_self;
};
template <class T, template <class> class Creator>
T *Singleton<T, Creator>::s_self = 0;
#endif // SINGLETON_H
/* vim: et sw=4 ts=4
*/
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