Singleton in Action?

[Ron Tarrant]

Hi guys,

I ran into another snag this morning while trying to implement a 
singleton. I found all kinds of examples of singleton 
definitions, but nothing about how to put them into practice.

Can someone show me a code example for how one would actually use 
a singleton pattern in D? When I did the same thing in PHP, it 
took me forever to wrap my brain around it, so I'm hoping to get 
there a little faster this time.

Here's the singleton code I've been playing with:

class DSingleton
{
	private:
	// Cache instantiation flag in thread-local bool
	// Thread local
	static bool instantiated_;

	// Thread global
	__gshared DSingleton instance_;

	this()
	{
		
	} // this()

	public:
	
	static DSingleton get()
	{
		if(!instantiated_)
		{
			synchronized(DSingleton.classinfo)
			{
				if(!instance_)
				{
					instance_ = new DSingleton();
					writeln("creating");
				}

				instantiated_ = true;
			}
		}
		else
		{
			writeln("not created");
		}

		return(instance_);
		
	} // DSingleton()

} // class DSingleton

So, my big question is, do I instantiate like this:

DSingleton singleton = new DSingleton;

Or like this:

DSingleton singleton = singleton.get();

And subsequent calls would be...? The same? Using get() only?