388 lines
9.4 KiB
C++
388 lines
9.4 KiB
C++
|
//+-------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Microsoft Windows
|
||
|
|
// Copyright (C) Microsoft Corporation, 1992 - 1992.
|
||
|
|
//
|
||
|
|
// File: dl.hxx
|
||
|
|
//
|
||
|
|
// Contents: Delta list headers for streams
|
||
|
|
//
|
||
|
|
// Classes: SDeltaBlock
|
||
|
|
// CDeltaList
|
||
|
|
//
|
||
|
|
// History: 28-Jul-92 PhilipLa Created.
|
||
|
|
//
|
||
|
|
//--------------------------------------------------------------------------
|
||
|
|
|
||
|
|
#ifndef __DL_HXX__
|
||
|
|
#define __DL_HXX__
|
||
|
|
|
||
|
|
#define DL_GET 0
|
||
|
|
#define DL_CREATE 1
|
||
|
|
#define DL_READ 2
|
||
|
|
|
||
|
|
class CTransactedStream;
|
||
|
|
SAFE_DFBASED_PTR(CBasedTransactedStreamPtr, CTransactedStream);
|
||
|
|
|
||
|
|
#define CBITPERUSHORT 16
|
||
|
|
|
||
|
|
//+-------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Class: SDeltaBlock (db)
|
||
|
|
//
|
||
|
|
// Purpose: A single block of delta list entries.
|
||
|
|
//
|
||
|
|
// Interface:
|
||
|
|
//
|
||
|
|
// History: 10-Jul-92 PhilipLa Created.
|
||
|
|
//
|
||
|
|
// Notes:
|
||
|
|
//
|
||
|
|
//--------------------------------------------------------------------------
|
||
|
|
|
||
|
|
struct SDeltaBlock
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
#ifndef _MAC
|
||
|
|
inline
|
||
|
|
#endif
|
||
|
|
SDeltaBlock();
|
||
|
|
|
||
|
|
#ifndef _MAC
|
||
|
|
inline
|
||
|
|
#endif
|
||
|
|
void *operator new(size_t size, IMalloc * const pMalloc);
|
||
|
|
|
||
|
|
inline const BOOL IsOwned(const USHORT uOffset);
|
||
|
|
inline void MakeOwn(const USHORT uOffset);
|
||
|
|
inline void DisOwn(const USHORT uOffset);
|
||
|
|
|
||
|
|
SECT _sect[CSECTPERBLOCK];
|
||
|
|
USHORT _fOwn[(CSECTPERBLOCK / CBITPERUSHORT)];
|
||
|
|
};
|
||
|
|
SAFE_DFBASED_PTR(CBasedDeltaBlockPtr, SDeltaBlock);
|
||
|
|
SAFE_DFBASED_PTR(CBasedDeltaBlockPtrPtr, CBasedDeltaBlockPtr);
|
||
|
|
|
||
|
|
|
||
|
|
inline const BOOL SDeltaBlock::IsOwned(const USHORT uOffset)
|
||
|
|
{
|
||
|
|
msfAssert(uOffset < CSECTPERBLOCK);
|
||
|
|
return (_fOwn[uOffset / CBITPERUSHORT] &
|
||
|
|
(1 << (uOffset % CBITPERUSHORT))) != 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
inline void SDeltaBlock::MakeOwn(const USHORT uOffset)
|
||
|
|
{
|
||
|
|
msfAssert(uOffset < CSECTPERBLOCK);
|
||
|
|
msfAssert(!IsOwned(uOffset));
|
||
|
|
msfAssert((uOffset / CBITPERUSHORT) < (CSECTPERBLOCK / CBITPERUSHORT));
|
||
|
|
|
||
|
|
_fOwn[uOffset / CBITPERUSHORT] |= (1 << (uOffset % CBITPERUSHORT));
|
||
|
|
}
|
||
|
|
|
||
|
|
inline void SDeltaBlock::DisOwn(const USHORT uOffset)
|
||
|
|
{
|
||
|
|
msfAssert(uOffset < CSECTPERBLOCK);
|
||
|
|
msfAssert(IsOwned(uOffset));
|
||
|
|
msfAssert((uOffset / CBITPERUSHORT) < (CSECTPERBLOCK / CBITPERUSHORT));
|
||
|
|
|
||
|
|
_fOwn[uOffset / CBITPERUSHORT] &= ~(1 << (uOffset % CBITPERUSHORT));
|
||
|
|
}
|
||
|
|
|
||
|
|
//+-------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Class: CDeltaList (dl)
|
||
|
|
//
|
||
|
|
// Purpose: Delta list for transacted streans.
|
||
|
|
//
|
||
|
|
// Interface:
|
||
|
|
//
|
||
|
|
// History: 21-Jan-92 PhilipLa Created.
|
||
|
|
//
|
||
|
|
// Notes:
|
||
|
|
//
|
||
|
|
//--------------------------------------------------------------------------
|
||
|
|
|
||
|
|
class CDeltaList
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
CDeltaList(CMStream *pms, CMStream *pmsScratch);
|
||
|
|
|
||
|
|
#ifdef LARGE_STREAMS
|
||
|
|
SCODE Init(ULONGLONG ulSize, CTransactedStream *ptsParent);
|
||
|
|
SCODE InitResize(ULONGLONG ulSize);
|
||
|
|
#else
|
||
|
|
SCODE Init(ULONG ulSize, CTransactedStream *ptsParent);
|
||
|
|
SCODE InitResize(ULONG ulSize);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
~CDeltaList();
|
||
|
|
|
||
|
|
SCODE GetMap(SECT sectOld, const DWORD dwFlags, SECT *psectRet);
|
||
|
|
|
||
|
|
void BeginCommit(CTransactedStream *ptsParent);
|
||
|
|
void EndCommit(CDeltaList *pdlNew, DFLAGS df);
|
||
|
|
|
||
|
|
inline ILockBytes *GetDataILB(void);
|
||
|
|
inline ILockBytes *GetControlILB(void);
|
||
|
|
|
||
|
|
inline CFat * GetDataFat(void);
|
||
|
|
inline CFat * GetControlFat(void);
|
||
|
|
|
||
|
|
inline USHORT GetDataSectorSize(void);
|
||
|
|
inline USHORT GetDataSectorShift(void);
|
||
|
|
|
||
|
|
inline USHORT GetControlSectorSize(void);
|
||
|
|
|
||
|
|
void Empty(void);
|
||
|
|
|
||
|
|
inline BOOL IsEmpty(void);
|
||
|
|
inline BOOL IsInMemory(void);
|
||
|
|
inline BOOL IsInStream(void);
|
||
|
|
|
||
|
|
inline BOOL IsNoScratch(void);
|
||
|
|
|
||
|
|
SCODE IsOwned(SECT sect, SECT sectMap, BOOL *fOwn);
|
||
|
|
|
||
|
|
inline CMStream * GetMStream();
|
||
|
|
SCODE ReleaseInvalidSects(SECT sectMaxValid);
|
||
|
|
|
||
|
|
private:
|
||
|
|
CBasedDeltaBlockPtrPtr _apdb;
|
||
|
|
ULONG _ulSize;
|
||
|
|
|
||
|
|
CBasedMStreamPtr _pmsScratch;
|
||
|
|
|
||
|
|
CBasedMStreamPtr _pms;
|
||
|
|
|
||
|
|
CBasedTransactedStreamPtr _ptsParent;
|
||
|
|
SECT _sectStart;
|
||
|
|
|
||
|
|
SCODE InitStreamBlock(ULONG ul);
|
||
|
|
|
||
|
|
SCODE ReadMap(SECT *psectStart, SECT sect, SECT *psectRet);
|
||
|
|
SCODE WriteMap(SECT *psectStart, SECT sect, SECT sectMap);
|
||
|
|
|
||
|
|
void FreeStream(SECT sectStart, ULONG ulSize);
|
||
|
|
|
||
|
|
SCODE FindOffset(
|
||
|
|
SECT *psectStart,
|
||
|
|
SECT sect,
|
||
|
|
ULARGE_INTEGER *pulRet,
|
||
|
|
BOOL fWrite);
|
||
|
|
|
||
|
|
SCODE DumpList(void);
|
||
|
|
|
||
|
|
#if DBG == 1
|
||
|
|
void PrintList(void);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
void ReleaseBlock(ULONG oBlock);
|
||
|
|
|
||
|
|
inline CBasedDeltaBlockPtr * GetNewDeltaArray(ULONG ulSize);
|
||
|
|
};
|
||
|
|
SAFE_DFBASED_PTR(CBasedDeltaListPtr, CDeltaList);
|
||
|
|
|
||
|
|
|
||
|
|
//-----------------
|
||
|
|
|
||
|
|
inline CMStream * CDeltaList::GetMStream()
|
||
|
|
{
|
||
|
|
if (!IsNoScratch())
|
||
|
|
return _pmsScratch;
|
||
|
|
else
|
||
|
|
return _pms;
|
||
|
|
}
|
||
|
|
|
||
|
|
//+-------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Method: CDeltaList::GetDataILB, public
|
||
|
|
//
|
||
|
|
// Synopsis: Return pointer to ILockBytes for storing data
|
||
|
|
//
|
||
|
|
// History: 10-Jul-92 PhilipLa Created.
|
||
|
|
//
|
||
|
|
//--------------------------------------------------------------------------
|
||
|
|
|
||
|
|
inline ILockBytes * CDeltaList::GetDataILB(void)
|
||
|
|
{
|
||
|
|
if (_pms)
|
||
|
|
return _pms->GetILB();
|
||
|
|
else
|
||
|
|
return _pmsScratch->GetILB();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//+-------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Method: CDeltaList::GetControlILB, public
|
||
|
|
//
|
||
|
|
// Synopsis: Return pointer to ILockBytes for storing control information
|
||
|
|
//
|
||
|
|
// History: 10-Jul-92 PhilipLa Created.
|
||
|
|
//
|
||
|
|
//--------------------------------------------------------------------------
|
||
|
|
|
||
|
|
inline ILockBytes * CDeltaList::GetControlILB(void)
|
||
|
|
{
|
||
|
|
return _pmsScratch->GetILB();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//+-------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Method: CDeltaList::GetDataFat, public
|
||
|
|
//
|
||
|
|
// Synopsis: Return pointer to fat to use for storing stream data
|
||
|
|
//
|
||
|
|
// History: 10-Jul-92 PhilipLa Created.
|
||
|
|
//
|
||
|
|
//--------------------------------------------------------------------------
|
||
|
|
|
||
|
|
inline CFat * CDeltaList::GetDataFat(void)
|
||
|
|
{
|
||
|
|
if (_pms)
|
||
|
|
return _pmsScratch->GetMiniFat();
|
||
|
|
else
|
||
|
|
return _pmsScratch->GetFat();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//+-------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Method: CDeltaList::GetControlFat, public
|
||
|
|
//
|
||
|
|
// Synopsis: Return pointer to fat to use for storing control information
|
||
|
|
//
|
||
|
|
// History: 10-Jul-92 PhilipLa Created.
|
||
|
|
//
|
||
|
|
//--------------------------------------------------------------------------
|
||
|
|
|
||
|
|
inline CFat * CDeltaList::GetControlFat(void)
|
||
|
|
{
|
||
|
|
return _pmsScratch->GetFat();
|
||
|
|
}
|
||
|
|
|
||
|
|
//+-------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Method: CDeltaList::GetDataSectorSize, public
|
||
|
|
//
|
||
|
|
// Synopsis: Return sector size for storing stream data
|
||
|
|
//
|
||
|
|
// History: 10-Jul-92 PhilipLa Created.
|
||
|
|
//
|
||
|
|
//--------------------------------------------------------------------------
|
||
|
|
|
||
|
|
inline USHORT CDeltaList::GetDataSectorSize(void)
|
||
|
|
{
|
||
|
|
if (_pms)
|
||
|
|
return _pms->GetSectorSize();
|
||
|
|
else
|
||
|
|
return _pmsScratch->GetSectorSize();
|
||
|
|
}
|
||
|
|
|
||
|
|
//+-------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Method: CDeltaList::GetDataSectorShift, public
|
||
|
|
//
|
||
|
|
// Synopsis: Return sector size for storing stream data
|
||
|
|
//
|
||
|
|
// History: 10-Jul-92 PhilipLa Created.
|
||
|
|
//
|
||
|
|
//--------------------------------------------------------------------------
|
||
|
|
|
||
|
|
inline USHORT CDeltaList::GetDataSectorShift(void)
|
||
|
|
{
|
||
|
|
if (_pms)
|
||
|
|
return _pms->GetSectorShift();
|
||
|
|
else
|
||
|
|
return _pmsScratch->GetSectorShift();
|
||
|
|
}
|
||
|
|
|
||
|
|
//+-------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Method: CDeltaList::GetControlSectorSize, public
|
||
|
|
//
|
||
|
|
// Synopsis: Return sector size for storing control information
|
||
|
|
//
|
||
|
|
// History: 10-Jul-92 PhilipLa Created.
|
||
|
|
//
|
||
|
|
//--------------------------------------------------------------------------
|
||
|
|
|
||
|
|
inline USHORT CDeltaList::GetControlSectorSize(void)
|
||
|
|
{
|
||
|
|
return _pmsScratch->GetSectorSize();
|
||
|
|
}
|
||
|
|
|
||
|
|
//+---------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Member: CDeltaList::IsNoScratch, public
|
||
|
|
//
|
||
|
|
// Synopsis: Return TRUE if the delta list is in no-scratch mode
|
||
|
|
//
|
||
|
|
// Arguments: None.
|
||
|
|
//
|
||
|
|
// History: 19-Nov-92 PhilipLa Created
|
||
|
|
//
|
||
|
|
//----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
inline BOOL CDeltaList::IsNoScratch(void)
|
||
|
|
{
|
||
|
|
return (_pms != NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
//+---------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Member: CDeltaList::IsEmpty, public
|
||
|
|
//
|
||
|
|
// Synopsis: Return TRUE if the delta list contains no changes.
|
||
|
|
//
|
||
|
|
// Arguments: None.
|
||
|
|
//
|
||
|
|
// History: 19-Nov-92 PhilipLa Created
|
||
|
|
//
|
||
|
|
//----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
inline BOOL CDeltaList::IsEmpty(void)
|
||
|
|
{
|
||
|
|
return ((_apdb == NULL) && (_sectStart == ENDOFCHAIN));
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//+---------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Member: CDeltaList::IsInMemory, public
|
||
|
|
//
|
||
|
|
// Synopsis: Return TRUE if the delta list is in memory
|
||
|
|
//
|
||
|
|
// Arguments: None.
|
||
|
|
//
|
||
|
|
// History: 19-Nov-92 PhilipLa Created
|
||
|
|
//
|
||
|
|
//----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
inline BOOL CDeltaList::IsInMemory(void)
|
||
|
|
{
|
||
|
|
return (_apdb != NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//+---------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Member: CDeltaList::IsInStream, public
|
||
|
|
//
|
||
|
|
// Synopsis: Return TRUE if the delta list is in a stream
|
||
|
|
//
|
||
|
|
// Arguments: None.
|
||
|
|
//
|
||
|
|
// History: 19-Nov-92 PhilipLa Created
|
||
|
|
//
|
||
|
|
//----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
inline BOOL CDeltaList::IsInStream(void)
|
||
|
|
{
|
||
|
|
return ((_apdb == NULL) && (_sectStart != ENDOFCHAIN));
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif //__DL_HXX__
|