singleton.d

class MySingleton
{
    private this()
    {

    }

    private static bool instantiated_;
    private __gshared MySingleton instance_;

    static MySingleton get()
    {
        if (!instanciated_)
        {
            synchronized (MySingleton.classinfo)
            {
                if (!instance_)
                {
                    instance_ = new MySingleton();
                }
                instantiated_ = true;
            }
            return instance_;
        }
    }

}