OTS/OTSCPP/OTSControl/OTSSingleton.h

#pragma once

namespace OTSController {

	/// <summary>
	/// Singleton template class by smart pointer.
	/// </summary>
	template<class singleType>
	class Singleton
	{
	public:
		static std::shared_ptr<singleType> GetInstance()
		{
			auto shareObject = m_singleObject.lock();
			if (!shareObject)
			{
				shareObject.reset(new singleType);
				m_singleObject = shareObject;
			}

			return shareObject;
		}

	private:
		/// <summary>
		/// The single object
		/// </summary>
		static std::weak_ptr<singleType> m_singleObject;
	};

	/// <summary>
	/// The single object
	/// </summary>
	template<class singleType>
	std::weak_ptr<singleType> Singleton<singleType>::m_singleObject;

}