63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
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//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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//=============================================================================
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#ifndef DEPENDENCYGRAPH_H
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#define DEPENDENCYGRAPH_H
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#ifdef _WIN32
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#pragma once
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#endif
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#include "tier1/utlvector.h"
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#include "tier1/utlhash.h"
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//-----------------------------------------------------------------------------
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// Forward declarations
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//-----------------------------------------------------------------------------
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class CDmAttribute;
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class IDmeOperator;
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struct COperatorNode;
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class CAttributeNode;
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//-----------------------------------------------------------------------------
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// CDependencyGraph class - sorts operators based upon the input/output graph
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//-----------------------------------------------------------------------------
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class CDependencyGraph
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{
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public:
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CDependencyGraph();
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~CDependencyGraph();
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void Reset( const CUtlVector< IDmeOperator * > &operators );
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// caches only the operators that need to be evaluated, sorted by dependencies
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// returns true if a cycle found - in this case, an arbitrary link of the cycle will be ignored
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bool CullAndSortOperators();
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const CUtlVector< IDmeOperator* > &GetSortedOperators() const { return m_operators; }
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private:
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static bool GetOperatorOrdering( CUtlVector< COperatorNode* > &pOpNodes, CUtlVector< IDmeOperator * > &operators );
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static void DBG_PrintOperator( const char *pIndent, IDmeOperator *pOp );
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friend class CDmElementFramework;
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void Cleanup();
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void FindRoots();
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CAttributeNode *FindAttrNode( CDmAttribute *pAttr );
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CUtlVector< COperatorNode* > m_opRoots;
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// CUtlVector< COperatorNode* > m_opLeaves;
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CUtlVector< COperatorNode* > m_opNodes;
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CUtlHash< CAttributeNode* > m_attrNodes;
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CUtlVector< IDmeOperator* > m_operators;
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};
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#endif // DEPENDENCYGRAPH_H
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