text: /*
   * Copyright: JessMA Open Source (ldcsaa@gmail.com)
   *
   * Author	: Bruce Liang
   * Website	: http://www.jessma.org
   * Project	: https://github.com/ldcsaa
   * Blog		: http://www.cnblogs.com/ldcsaa
   * Wiki		: http://www.oschina.net/p/hp-socket
   * QQ Group	: 75375912, 44636872
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #pragma once
  
  #define SINGLETON_THIS(ClassName)		ClassName::GetThis()
  #define SINGLETON_INSTANCE(ClassName)	ClassName::GetInstance()
  #define SINGLETON_OBJECT(ObjName)		SINGLETON_INSTANCE(C##ObjName)
  
  #define DEFINE_SINGLETON(ClassName)											\
  	ClassName* ClassName::m_pThis = nullptr;
  
  #define DEFINE_P_THIS(ClassName)											\
  		DEFINE_SINGLETON(ClassName)
  
  #define DECLARE_SINGLETON_INTERFACE(ClassName)								\
  public:																		\
  	static ClassName* GetThis()		{return m_pThis;}						\
  	static ClassName& GetInstance() {return *m_pThis;}						\
  protected:																	\
  	static ClassName* m_pThis;
  
  #define DECLARE_SINGLETON_CREATE_INSTANCE(ClassName)						\
  public:																		\
  	static BOOL CreateInstance()											\
  	{																		\
  		if(!m_pThis)														\
  			m_pThis = new ClassName;										\
  																			\
  		return m_pThis != nullptr;											\
  	}																		\
  																			\
  	static BOOL DeleteInstance()											\
  	{																		\
  		if(m_pThis)															\
  		{																	\
  			delete m_pThis;													\
  			m_pThis = nullptr;												\
  		}																	\
  																			\
  		return m_pThis == nullptr;											\
  	}
  
  #define DECLARE_PRIVATE_DEFAULT_CONSTRUCTOR(ClassName)						\
  private:																	\
  	ClassName(){}
  
  #define DECLARE_PRIVATE_COPY_CONSTRUCTOR(ClassName)							\
  private:																	\
  	ClassName(const ClassName&);											\
  	ClassName& operator = (const ClassName&);
  
  #define DECLARE_NO_COPY_CLASS(className)									\
  		DECLARE_PRIVATE_COPY_CONSTRUCTOR(className)
  
  
  #define DECLARE_SINGLETON_IMPLEMENT_NO_CREATE_INSTANCE(ClassName)			\
  	DECLARE_SINGLETON_INTERFACE(ClassName)									\
  	DECLARE_PRIVATE_DEFAULT_CONSTRUCTOR(ClassName)							\
  	DECLARE_PRIVATE_COPY_CONSTRUCTOR(ClassName)								
  
  #define DECLARE_SINGLETON_IMPLEMENT_NO_DEFAULT_CONSTRUCTOR(ClassName)		\
  	DECLARE_SINGLETON_CREATE_INSTANCE(ClassName)							\
  	DECLARE_PRIVATE_COPY_CONSTRUCTOR(ClassName)
  
  #define DECLARE_SINGLETON_IMPLEMENT(ClassName)								\
  	DECLARE_SINGLETON_IMPLEMENT_NO_DEFAULT_CONSTRUCTOR(ClassName)			\
  	DECLARE_PRIVATE_DEFAULT_CONSTRUCTOR(ClassName)
  
  #define DECLARE_SINGLETON_NO_DEFAULT_CONSTRUCTOR(ClassName)					\
  	DECLARE_SINGLETON_INTERFACE(ClassName)									\
  	DECLARE_SINGLETON_IMPLEMENT_NO_DEFAULT_CONSTRUCTOR(ClassName)
  
  #define DECLARE_SINGLETON(ClassName)										\
  	DECLARE_SINGLETON_NO_DEFAULT_CONSTRUCTOR(ClassName)						\
  	DECLARE_PRIVATE_DEFAULT_CONSTRUCTOR(ClassName)
  
  
  template<class T>
  class CSingleObject
  {
  public:
  	CSingleObject	()	{T::CreateInstance();}
  	~CSingleObject	()	{T::DeleteInstance();}
  	T* GetPointer	()	{return T::GetThis();}
  	T& GetObject	()	{return T::GetInstance();}
  	BOOL IsValid	()	{return GetPointer() != nullptr;}
  };
  
  #define DECLARE_SINGLE_OBJECT(ClassName) CSingleObject<ClassName> _##ClassName##_Single_Object_;