355 lines
8.8 KiB
C++
355 lines
8.8 KiB
C++
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//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1992.
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//
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// File: tstream.hxx
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//
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// Contents: Transacted stream class definition
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//
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// Classes: CTransactedStream - Transacted stream object
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// CDeltaList - Delta list object
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//
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// History: 23-Jan-92 PhilipLa Created.
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//
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//--------------------------------------------------------------------------
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#ifndef __TSTREAM_HXX__
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#define __TSTREAM_HXX__
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#include <msf.hxx>
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#include <tset.hxx>
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#include <psstream.hxx>
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#include <dfbasis.hxx>
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#include <freelist.hxx>
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#include <dl.hxx>
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//+-------------------------------------------------------------------------
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//
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// Class: CTransactedStream (ts)
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//
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// Purpose: Transacted stream object
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//
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// Interface:
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//
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// History: 21-Jan-92 PhilipLa Created.
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//
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// Notes:
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//
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//--------------------------------------------------------------------------
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class CTransactedStream : public PSStream, public PTSetMember,
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public CMallocBased
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{
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public:
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inline void *operator new(size_t size, IMalloc * const pMalloc);
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inline void *operator new(size_t size, CDFBasis * const pdfb);
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inline void ReturnToReserve(CDFBasis * const pdfb);
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inline static SCODE Reserve(UINT cItems, CDFBasis * const pdfb);
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inline static void Unreserve(UINT cItems, CDFBasis * const pdfb);
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CTransactedStream(CDfName const *pdfn,
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DFLUID dl,
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DFLAGS df,
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#ifdef USE_NOSCRATCH
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CMStream *pms,
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#endif
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CMStream *pmsScratch);
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SCODE Init(PSStream *pssBase);
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~CTransactedStream();
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inline void DecRef(VOID);
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inline void AddRef () { PBasicEntry::AddRef(); };
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inline void Release () { PBasicEntry::Release(); };
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SCODE ReadAt(
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#ifdef LARGE_STREAMS
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ULONGLONG ulOffset,
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#else
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ULONG ulOffset,
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#endif
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VOID *pBuffer,
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ULONG ulCount,
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ULONG STACKBASED *pulRetval);
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SCODE WriteAt(
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#ifdef LARGE_STREAMS
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ULONGLONG ulOffset,
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#else
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ULONG ulOffset,
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#endif
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VOID const *pBuffer,
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ULONG ulCount,
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ULONG STACKBASED *pulRetval);
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#ifdef LARGE_STREAMS
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SCODE SetSize(ULONGLONG ulNewSize);
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void GetSize(ULONGLONG *pulSize);
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#else
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SCODE SetSize(ULONG ulNewSize);
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void GetSize(ULONG *pulSize);
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#endif
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SCODE BeginCommitFromChild(
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#ifdef LARGE_STREAMS
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ULONGLONG ulSize,
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#else
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ULONG ulSize,
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#endif
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CDeltaList *pDelta,
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CTransactedStream *pstChild);
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void EndCommitFromChild(DFLAGS df,
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CTransactedStream *pstChild);
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CDeltaList * GetDeltaList(void);
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//Inherited from PTSetMember:
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SCODE BeginCommit(DWORD const dwFlags);
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void EndCommit(DFLAGS const df);
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void Revert(void);
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#ifdef LARGE_STREAMS
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void GetCommitInfo(ULONGLONG *pulRet1, ULONGLONG *pulRet2);
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#else
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void GetCommitInfo(ULONG *pulRet1, ULONG *pulRet2);
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#endif
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inline void EmptyCache ();
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// PBasicEntry
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SCODE SetBase(PSStream *psst);
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inline PSStream* GetBase();
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inline void SetClean(void);
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inline void SetDirty(UINT fDirty);
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inline UINT GetDirty(void) const;
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private:
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SCODE PartialWrite(
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ULONG ulBasePos,
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ULONG ulDirtyPos,
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BYTE const HUGEP *pb,
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USHORT offset,
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USHORT uLen);
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SCODE SetInitialState(PSStream *pssBase);
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#ifdef LARGE_STREAMS
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ULONGLONG _ulSize;
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#else
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ULONG _ulSize;
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#endif
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CBasedSStreamPtr _pssBase;
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SECT _sectLastUsed;
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CDeltaList _dl;
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DFLAGS _df;
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UINT _fDirty;
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BOOL _fBeginCommit;
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CBasedDeltaListPtr _pdlOld;
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#ifdef LARGE_STREAMS
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ULONGLONG _ulOldSize;
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#else
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ULONG _ulOldSize;
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#endif
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#ifdef INDINST
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DFSIGNATURE _sigOldBase;
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DFSIGNATURE _sigOldSelf;
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#endif
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};
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//+--------------------------------------------------------------
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//
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// Member: CTransactedStream::operator new, public
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//
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// Synopsis: Unreserved object allocator
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//
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// Arguments: [size] -- byte count to allocate
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// [pMalloc] -- allocator
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//
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// History: 25-May-93 AlexT Created
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//
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//---------------------------------------------------------------
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inline void *CTransactedStream::operator new(size_t size,
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IMalloc * const pMalloc)
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{
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return(CMallocBased::operator new(size, pMalloc));
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}
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//+--------------------------------------------------------------
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//
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// Member: CTransactedStream::operator new, public
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//
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// Synopsis: Reserved object allocator
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//
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// Arguments: [size] -- byte count to allocate
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// [pdfb] -- basis
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//
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// History: 25-May-93 AlexT Created
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//
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//---------------------------------------------------------------
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inline void *CTransactedStream::operator new(size_t size, CDFBasis * const pdfb)
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{
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olAssert(size == sizeof(CTransactedStream));
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return pdfb->GetFreeList(CDFB_TRANSACTEDSTREAM)->GetReserved();
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}
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//+--------------------------------------------------------------
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//
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// Member: CTransactedStream::ReturnToReserve, public
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//
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// Synopsis: Reserved object return
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//
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// Arguments: [pdfb] -- basis
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//
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// History: 25-May-93 AlexT Created
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//
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//---------------------------------------------------------------
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inline void CTransactedStream::ReturnToReserve(CDFBasis * const pdfb)
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{
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CTransactedStream::~CTransactedStream();
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pdfb->GetFreeList(CDFB_TRANSACTEDSTREAM)->ReturnToReserve(this);
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}
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//+--------------------------------------------------------------
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//
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// Member: CTransactedStream::Reserve, public
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//
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// Synopsis: Reserve instances
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//
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// Arguments: [cItems] -- count of items
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// [pdfb] -- basis
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//
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// History: 25-May-93 AlexT Created
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//
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//---------------------------------------------------------------
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inline SCODE CTransactedStream::Reserve(UINT cItems, CDFBasis * const pdfb)
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{
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return pdfb->Reserve(cItems, CDFB_TRANSACTEDSTREAM);
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}
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//+--------------------------------------------------------------
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//
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// Member: CTransactedStream::Unreserve, public
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//
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// Synopsis: Unreserve instances
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//
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// Arguments: [cItems] -- count of items
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// [pdfb] -- basis
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//
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// History: 25-May-93 AlexT Created
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//
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//---------------------------------------------------------------
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inline void CTransactedStream::Unreserve(UINT cItems, CDFBasis * const pdfb)
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{
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pdfb->Unreserve(cItems, CDFB_TRANSACTEDSTREAM);
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}
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//+--------------------------------------------------------------
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//
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// Member: CTransactedStream::GetBase, public
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//
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// Synopsis: Returns base; used for debug checks
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//
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// History: 15-Sep-92 AlexT Created
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//
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//---------------------------------------------------------------
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inline PSStream *CTransactedStream::GetBase()
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{
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return BP_TO_P(PSStream *, _pssBase);
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CTransactedStream::SetClean, public
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//
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// Synopsis: Resets dirty flags
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//
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// History: 11-Nov-92 DrewB Created
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//
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//----------------------------------------------------------------------------
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inline void CTransactedStream::SetClean(void)
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{
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_fDirty = 0;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CTransactedStream::SetDirty, public
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//
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// Synopsis: Sets dirty flags
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//
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// History: 11-Nov-92 DrewB Created
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//
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//----------------------------------------------------------------------------
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inline void CTransactedStream::SetDirty(UINT fDirty)
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{
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_fDirty |= fDirty;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CTransactedStream::DecRef, public
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//
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// Synopsis: Decrements the ref count
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//
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// History: 25-Nov-92 DrewB Created
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//
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//----------------------------------------------------------------------------
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inline void CTransactedStream::DecRef(void)
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{
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AtomicDec(&_cReferences);
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CTransactedStream::GetDirty, public
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//
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// Synopsis: Returns the dirty flags
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//
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// History: 17-Dec-92 DrewB Created
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//
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//----------------------------------------------------------------------------
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inline UINT CTransactedStream::GetDirty(void) const
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{
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return _fDirty;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CTransactedStream::EmptyCache, public
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//
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// Synopsis: Empties the stream cache
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//
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// History: 27-Jul-1999 HenryLee Created
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//
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//----------------------------------------------------------------------------
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inline void CTransactedStream::EmptyCache (void)
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{
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PSStream * const pssBase = _pssBase;
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if (pssBase != NULL)
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pssBase->EmptyCache();
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}
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#endif //__TSTREAM_HXX__
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