510b9edbb6
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@21773 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
94 lines
2.1 KiB
C++
94 lines
2.1 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: garbagec.h
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// Purpose: GarbageCollector class.
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// Author: Aleksandras Gluchovas (@Lithuania)
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// Modified by:
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// Created: ??/10/98
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// RCS-ID: $Id$
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// Copyright: (c) Aleksandras Gluchovas
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef __GARBAGEC_G__
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#define __GARBAGEC_G__
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#if defined(__GNUG__) && !defined(__APPLE__)
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#pragma interface "garbagec.h"
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#endif
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#include "wx/list.h"
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#include "wx/fl/fldefs.h"
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struct GCItem
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{
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void* mpObj;
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wxList mRefs; // references to other nodes
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};
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inline void* gc_node_to_obj( wxNode* pGCNode )
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{
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return ( (GCItem*) (pGCNode->GetData()) )->mpObj;
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}
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/*
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This class implements an extremely slow but simple garbage collection algorithm.
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*/
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class WXDLLIMPEXP_FL GarbageCollector
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{
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protected:
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wxList mAllNodes;
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wxList mRegularLst;
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wxList mCycledLst;
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// Internal method for finding a node.
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wxNode* FindItemNode( void* pForObj );
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// Internal method for resolving references.
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void ResolveReferences();
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// Internal method for findind and freeing a node.
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wxNode* FindReferenceFreeItemNode();
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// Remove references to this node.
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void RemoveReferencesToNode( wxNode* pItemNode );
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// Destroys a list of items.
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void DestroyItemList( wxList& lst );
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public:
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// Default constructor.
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GarbageCollector() {}
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// Destructor.
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virtual ~GarbageCollector();
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// Prepare data for garbage collection.
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virtual void AddObject( void* pObj, int refCnt = 1 );
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// Prepare data for garbage collection.
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virtual void AddDependency( void* pObj, void* pDependsOnObj );
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// Executes garbage collection algorithm.
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virtual void ArrangeCollection();
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// Accesses the results of the algorithm.
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wxList& GetRegularObjects();
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// Get cycled objects.
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wxList& GetCycledObjects();
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// Removes all data from the garbage collector.
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void Reset();
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};
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#endif /* __GARBAGEC_G__ */
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