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191 lines
4.3 KiB
191 lines
4.3 KiB
//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1991 - 1992.
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//
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// File: MERGE.HXX
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//
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// Contents: Merge object
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//
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// Classes: CMerge, CMasterMerge
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//
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// History: 13-Nov-91 BartoszM Created
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// 23-Aug-94 SrikantS Split up into CMerge and CMasterMerge.
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//
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//----------------------------------------------------------------------------
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#pragma once
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#include "dindex.hxx"
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#include "indsnap.hxx"
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#include "keylist.hxx"
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class CResManager;
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class CPartition;
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class CFreshTest;
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class PStorage;
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class CMasterMergeIndex;
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class CDeletedIIDTrans;
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//+---------------------------------------------------------------------------
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//
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// Class: CMerge
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//
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// Purpose: Encapsulated resources needed for merge of indexes
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// This is used for shadow merges. For master merge, use
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// CMasterMerge.
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//
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// History: 13-Nov-91 BartoszM Created.
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// 23-Aug-94 SrikantS Split up into CMerge and CMasterMerge.
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//
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//----------------------------------------------------------------------------
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class CMerge
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{
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public:
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//
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// These methods do not require locking:
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//
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CMerge ( CResManager & resman, PARTITIONID partid, MergeType mt );
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virtual ~CMerge ();
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// Main worker: no lock should be held!
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virtual void Do (CCiFrmPerfCounter & mergeProgress);
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unsigned LokCountOld() const { return _cIidOld; }
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INDEXID* LokGetIidList() { return _aIidOld; }
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CDiskIndex* LokGetNewIndex() { return _pIndexNew; }
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//
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// These methods require LOCKING
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//
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virtual void LokGrabResources();
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virtual void LokRollBack ( unsigned swapped = 0 );
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void LokZombify();
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void LokAbort();
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inline CFreshTest * GetFresh() { return _indSnap.GetFresh(); }
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MergeType GetMergeType() { return _mt; }
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void ReleaseNewIndex() { _pIndexNew = 0; }
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protected:
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void LokSetup( BOOL fIsMasterMerge );
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PARTITIONID _partid;
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CResManager& _resman;
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CPartition* _pPart;
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INDEXID _iidNew;
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WORKID _widNewIndex; // New index, shadow or master
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MergeType _mt; // Master vs. shadow merge
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// Owned resources:
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CIndexSnapshot _indSnap;
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CDiskIndex * _pIndexNew;
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INDEXID* _aIidOld;
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unsigned _cIidOld;
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};
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//+-------------------------------------------------------------------------
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//
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// Member: CMerge::LokAbort, public
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//
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// Synopsis: Abort merge-in-progress
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//
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// History: 13-Aug-93 KyleP Created
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//
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//--------------------------------------------------------------------------
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inline void CMerge::LokAbort()
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{
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//
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// We know there's an index becuase:
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// a) This call is made only after GrabResouces()
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// b) Under lock
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//
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Win4Assert( _pIndexNew );
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_pIndexNew->AbortMerge();
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}
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class CMasterMerge : public CMerge
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{
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public:
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CMasterMerge ( CResManager & resman, PARTITIONID partid )
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: CMerge( resman, partid, mtMaster ),
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_widCurrentMaster(widInvalid),
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_widMasterLog(widInvalid),
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_fSoftAbort(0),
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_pNewKeyList(0),
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_widKeyList(widInvalid)
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{
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END_CONSTRUCTION( CMasterMerge );
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}
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~CMasterMerge();
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CWKeyList * LokGetNewKeyList() { return _pNewKeyList; }
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void LokReleaseNewKeyList() { _pNewKeyList = 0; }
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// Main worker: no lock should be held!
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void Do(CCiFrmPerfCounter & mergeProgress);
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//
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// These methods require LOCKING
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//
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void LokGrabResources( CDeletedIIDTrans & trans );
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void LokRollBack ( unsigned swapped = 0 );
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void LokLoadRestartResources();
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CMasterMergeIndex * LokGetMasterMergeIndex()
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{
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return( (CMasterMergeIndex *) _pIndexNew );
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}
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void LokTakeIndexes( CMasterMergeIndex * pMaster );
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private:
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CMasterMergeIndex * LokCreateOrFindNewMaster();
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void LokStoreRestartResources( CDeletedIIDTrans & delIIDTrans );
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WORKID _widCurrentMaster; // Last master on this partition
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WORKID _widMasterLog; // Master log for this partition
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BOOL _fSoftAbort; // Flag set to TRUE if a soft
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// abort must be done.
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WORKID _widKeyList; // Keylist for this partition
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CWKeyList * _pNewKeyList;
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};
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