75 lines
1.5 KiB
C
75 lines
1.5 KiB
C
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/////////////////////////////////////////////////////////////////////////////
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// Name: No names yet.
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// Purpose: Contrib. demo
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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 license
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/////////////////////////////////////////////////////////////////////////////
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#ifndef __GARBAGEC_G__
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#define __GARBAGEC_G__
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#ifdef __GNUG__
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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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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->Data()) )->mpObj;
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}
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// class implements extremely slow, but probably one of the most simple GC algorithms
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class 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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wxNode* FindItemNode( void* pForObj );
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void ResolveReferences();
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wxNode* FindReferenceFreeItemNode();
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void RemoveReferencesToNode( wxNode* pItemNode );
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void DestroyItemList( wxList& lst );
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public:
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GarbageCollector() {}
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virtual ~GarbageCollector();
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// prepare data for GC alg.
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virtual void AddObject( void* pObj, int refCnt = 1 );
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virtual void AddDependency( void* pObj, void* pDependsOnObj );
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// executes GC alg.
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virtual void ArrangeCollection();
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// access results of the alg.
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wxList& GetRegularObjects();
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wxList& GetCycledObjects();
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// removes all data from GC
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void Reset();
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};
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#endif /* __GARBAGEC_G__ */
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