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//+---------------------------------------------------------------------------
//
// Copyright (C) 1992, Microsoft Corporation.
//
// File: PhysIndex.HXX
//
// Contents: FAT Buffer/Index package
//
// Classes: CPhysBuffer -- Buffer
//
// History: 05-Mar-92 KyleP Created
//
//----------------------------------------------------------------------------
#pragma once
#include <phystr.hxx>
//+-------------------------------------------------------------------------
//
// Class: CPhysIndex
//
// Purpose: Provides physical access to index pages
//
// History: 17-Feb-92 KyleP Subclass for PhysIndex / PhysHash
//
//--------------------------------------------------------------------------
class CPhysIndex : public CPhysStorage{public:
inline CPhysIndex( PStorage & storage, PStorageObject& obj, WORKID objectId, unsigned cpageReqSize, XPtr<PMmStream> & stream );
inline CPhysIndex( PStorage & storage, PStorageObject& obj, WORKID objectId, PStorage::EOpenMode mode, XPtr<PMmStream> & stream );
inline CPhysIndex( CPhysIndex & readIndex, PStorage::EOpenMode mode, XPtr<PMmStream> & stream );
inline PMmStream * DupReadWriteStream( PStorage::EOpenMode mode ) { return _storage.DupExistingIndexStream( _obj, _stream.GetReference(), mode ); }
PStorage & GetStorage() { return _storage; }
private:
virtual void ReOpenStream();};
//+-------------------------------------------------------------------------
//
// Class: CPhysHash
//
// Purpose: Provides physical access to hash pages
//
// History: 17-Feb-92 KyleP Subclass for PhysIndex / PhysHash
//
//--------------------------------------------------------------------------
class CPhysHash : public CPhysStorage{public:
inline CPhysHash( PStorage & storage, PStorageObject& obj, WORKID objectId, unsigned cpageReqSize, XPtr<PMmStream> & stream );
inline CPhysHash( PStorage & storage, PStorageObject& obj, WORKID objectId, PStorage::EOpenMode mode, XPtr<PMmStream> & stream );
private:
virtual void ReOpenStream();};
//+-------------------------------------------------------------------------
//
// Method: CPhysIndex::CPhysIndex
//
// Synopsis: Ctor for an existing index in readable or writeable mode.
//
// History: 17-Feb-1994 KyleP Created
// 10-Apr-1994 SrikantS Added the ability to open an
// existing stream for write
// access.
//
//--------------------------------------------------------------------------
inline CPhysIndex::CPhysIndex( PStorage & storage, PStorageObject& obj, WORKID objectid, PStorage::EOpenMode mode, XPtr<PMmStream> & stream ) : CPhysStorage( storage, obj, objectid, stream.Acquire(), mode, FALSE ){}
//+-------------------------------------------------------------------------
//
// Method: CPhysIndex::CPhysIndex
//
// Synopsis: Ctor for new writeable index
//
// History: 17-Feb-1994 KyleP Created
//
//--------------------------------------------------------------------------
inline CPhysIndex::CPhysIndex( PStorage & storage, PStorageObject & obj, WORKID objectid, unsigned cpageReqSize, XPtr<PMmStream> & stream ) : CPhysStorage( storage, obj, objectid, cpageReqSize, stream.Acquire(), FALSE ){}
//+---------------------------------------------------------------------------
//
// Function: CPhysIndex::CPhysIndex
//
// Synopsis: Clones an existing CPhysIndex by duplicating the stream.
// This is used during master merge to have a separate
// CPhysIndex for queries and the merge process.
//
// Arguments: [readIndex] -- An existing index.
// [mode] -- Mode in which to open.
//
// History: 8-23-94 srikants Created
//
// Notes:
//
//----------------------------------------------------------------------------
inline CPhysIndex::CPhysIndex( CPhysIndex & readIndex, PStorage::EOpenMode mode, XPtr<PMmStream> & stream ) : CPhysStorage( readIndex._storage, readIndex._obj, readIndex.ObjectId(), stream.Acquire(), mode, FALSE ){ Win4Assert( PStorage::eOpenForWrite == mode );}
//+-------------------------------------------------------------------------
//
// Method: CPhysHash::CPhysHash
//
// Synopsis: Ctor for an existing hash stream.
//
// History: 17-Feb-1994 KyleP Created
// 20-Apr-1994 Srikants Optionally open in write mode.
//
//--------------------------------------------------------------------------
inline CPhysHash::CPhysHash( PStorage & storage, PStorageObject& obj, WORKID objectid, PStorage::EOpenMode mode, XPtr<PMmStream> & stream ) : CPhysStorage( storage, obj, objectid, stream.Acquire(), mode, FALSE ){}
//+-------------------------------------------------------------------------
//
// Method: CPhysHash::CPhysHash
//
// Synopsis: Ctor for a new writeable hash
//
// History: 17-Feb-1994 KyleP Created
//
//--------------------------------------------------------------------------
inline CPhysHash::CPhysHash( PStorage & storage, PStorageObject & obj, WORKID objectid, unsigned cpageReqSize, XPtr<PMmStream> & stream ) : CPhysStorage( storage, obj, objectid, cpageReqSize, stream.Acquire(), FALSE ){}
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