autoreleasepool.h

This software aims to create an applet and panel tools to manage a wireless interface card, such as

//
// AutoReleasePool.h
//
// $Id: //poco/Main/Foundation/include/Foundation/AutoReleasePool.h#5 $
//
// Definition of the AutoReleasePool class.
//
// Copyright (c) 2004, Guenter Obiltschnig/Applied Informatics.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//
// 3. Redistributions in any form must be accompanied by information on
//    how to obtain complete source code for this software and any
//    accompanying software that uses this software.  The source code
//    must either be included in the distribution or be available for no
//    more than the cost of distribution plus a nominal fee, and must be
//    freely redistributable under reasonable conditions.  For an
//    executable file, complete source code means the source code for all
//    modules it contains.  It does not include source code for modules or
//    files that typically accompany the major components of the operating
//    system on which the executable file runs.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//


#ifndef Foundation_AutoReleasePool_INCLUDED
#define Foundation_AutoReleasePool_INCLUDED


#ifndef Foundation_Foundation_INCLUDED
#include "Foundation/Foundation.h"
#endif
#ifndef STD_LIST_INCLUDED
#include <list>
#define STD_LIST_INCLUDED
#endif


Foundation_BEGIN


template <class C>
class AutoReleasePool
	/// An AutoReleasePool implements simple garbage collection for 
	/// reference-counted objects.
	/// It temporarily takes ownwership of reference-counted objects that 
	/// nobody else wants to take ownership of and releases them 
	/// at a later, appropriate point in time.
	///
	/// Note: The correct way to add an object hold by an AutoPtr<> to
	/// an AutoReleasePool is by invoking the AutoPtr's duplicate()
	/// method. Example:
	///    AutoReleasePool<C> arp;
	///    AutoPtr<C> ptr = new C;
	///    ...
	///    arp.add(ptr.duplicate());
{
public:
	AutoReleasePool()
		/// Creates the AutoReleasePool.
	{
	}
	
	~AutoReleasePool()
		/// Destroys the AutoReleasePool and releases
		/// all objects it currently holds.
	{
		release();
	}
	
	void add(C* pObject)
		/// Adds the given object to the AutoReleasePool.
		/// The object's reference count is not modified
	{
		if (pObject)
			_list.push_back(pObject);
	}
	
	void release()
		/// Releases all objects the AutoReleasePool currently holds
		/// by calling each object's release() method.
	{
		while (!_list.empty())
		{
			_list.front()->release();
			_list.pop_front();
		}
	}
	
private:
	typedef std::list<C*> ObjectList;
	
	ObjectList _list;
};


Foundation_END


#endif // Foundation_AutoReleasePool_INCLUDED