trash.h

跨操作系统的微型中间件

/***************************************************************************
 *   Copyright (C) 2005 by armer song                                      *
 *   [e-mail]                                                       *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
#ifndef TRASH_H
#define TRASH_H

/**
@author armer song
*/
#include <list>

#include "OSHeaders.h"

template <typename T>
class CTrash
{
public:
	CTrash() : m_Limit(10) {}

	virtual ~CTrash() { FreeAll();}
public:
	T *	Allocate()
	{
		T *pTmp = NULL;
		if(!m_List.empty())
		{
			pTmp = m_List.front();
			m_List.pop_front();
		}
		else
		{
			pTmp = new T;
			if(!pTmp)
			{
				//log
				printf("Allocate failed\n");
			}
		}
		return pTmp;
	}

	void	Reclaim(T *p)
	{
		if(m_List.size() < m_Limit)
			m_List.push_back(p);
		else
			delete p;
	}
	
	//limit the trash size
	void	SetLimit(UInt32 iCount) { m_Limit = iCount;}
	
	//status
	Bool	IsEmpty() {return m_List.empty();}
	
	//free
	void	FreeAll()
	{
		while(!m_List.empty())
		{
			delete m_List.front();
			m_List.pop_front();
		}
	}
	
protected:
	typedef typename std::list<T*>	TrashList;
	typedef typename std::list<T*>::iterator	TrashListIterator;	
	
protected:
	TrashList	m_List;
	UInt32		m_Limit;
};
#endif