84 lines
2.2 KiB
C++
84 lines
2.2 KiB
C++
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//+---------------------------------------------------------------------------
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//
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// Copyright (C) Microsoft Corporation, 1991 - 1998
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//
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// File: filidmap.hxx
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//
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// Contents: FileId to wid mapping using hashed access
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//
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// History: 07-May-97 SitaramR Created
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//
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//----------------------------------------------------------------------------
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#pragma once
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#include "pershash.hxx"
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#include "usnlist.hxx"
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class CiCat;
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//+-------------------------------------------------------------------------
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//
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// Class: CFileIdMap
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//
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// Purpose: FileId to wid mapping using hashed access
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//
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// History: 07-May-97 SitaramR Created
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//
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//--------------------------------------------------------------------------
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class CFileIdMap : public CPersHash
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{
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public:
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CFileIdMap( CPropStoreManager & propStoreMgr );
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#if CIDBG == 1
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~CFileIdMap()
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{
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ciDebugOut(( DEB_ITRACE,
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"fileidmap cache hits %d, misses %d, negative hits %d, negative misses %d\n",
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_cCacheHits, _cCacheMisses, _cCacheNegativeHits, _cCacheNegativeMisses ));
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}
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#endif // CIDBG == 1
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BOOL FastInit ( CiStorage * pStorage, ULONG version );
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void LongInit ( ULONG version, BOOL fDirtyShutdown );
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void LokFlush();
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WORKID LokFind( FILEID fileId, VOLUMEID volumeId );
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void LokAdd ( FILEID fileId, WORKID wid, VOLUMEID volumeId );
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void LokDelete( FILEID fileId, WORKID wid );
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private:
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unsigned HashFun ( FILEID fileId );
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void HashAll();
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void AddToCache( FILEID & fileId, WORKID wid, VOLUMEID volumeId );
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BOOL FindInCache( FILEID & fileId, VOLUMEID volumeId, WORKID & wid );
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void RemoveFromCache( FILEID & fileId, WORKID wid );
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struct SFileIdMapEntry
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{
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FILEID fileId;
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WORKID wid;
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VOLUMEID volumeId;
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};
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enum { cFileIdMapCacheEntries = 6 };
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SFileIdMapEntry _aCache[ cFileIdMapCacheEntries ];
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unsigned _cCacheEntries;
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#if CIDBG == 1
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unsigned _cCacheHits;
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unsigned _cCacheNegativeHits;
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unsigned _cCacheMisses;
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unsigned _cCacheNegativeMisses;
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#endif // CIDBG == 1
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};
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