windows-nt/Source/XPSP1/NT/com/ole32/stg/exp/seekptr.hxx

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2020-09-26 03:20:57 -05:00
//+--------------------------------------------------------------
//
// Microsoft Windows
// Copyright (C) Microsoft Corporation, 1992 - 1992.
//
// File: seekptr.hxx
//
// Contents: CSeekPointer header
//
// Classes: CSeekPointer
//
// History: 30-Apr-92 DrewB Created
//
//---------------------------------------------------------------
#ifndef __SEEKPTR_HXX__
#define __SEEKPTR_HXX__
//+--------------------------------------------------------------
//
// Class: CSeekPointer
//
// Purpose: Contains a seek pointer to share between exposed
// streams
//
// Interface: See below.
//
// History: 30-Apr-92 DrewB Created
//
//---------------------------------------------------------------
class CSeekPointer : public CMallocBased
{
public:
#ifdef LARGE_STREAMS
inline CSeekPointer(ULONGLONG ulPos);
#else
inline CSeekPointer(ULONG ulPos);
#endif
inline ~CSeekPointer(void);
#ifdef LARGE_STREAMS
inline ULONGLONG GetPos(void) const;
inline void SetPos(ULONGLONG ulPos);
#else
inline ULONG GetPos(void) const;
inline void SetPos(ULONG ulPos);
#endif
inline void vAddRef(void);
void vRelease(void);
private:
#ifdef LARGE_STREAMS
ULONGLONG _ulPos;
#else
ULONG _ulPos;
#endif
LONG _cReferences;
};
//+--------------------------------------------------------------
//
// Member: CSeekPointer::CSeekPointer, public
//
// Synopsis: Ctor
//
// Arguments: [ulPos] - Initial position
//
// History: 30-Apr-92 DrewB Created
//
//---------------------------------------------------------------
#ifdef LARGE_STREAMS
inline CSeekPointer::CSeekPointer(ULONGLONG ulPos)
#else
inline CSeekPointer::CSeekPointer(ULONG ulPos)
#endif
{
_ulPos = ulPos;
_cReferences = 1;
}
//+--------------------------------------------------------------
//
// Member: CSeekPointer::~CSeekPointer, public
//
// Synopsis: Dtor
//
// History: 30-Apr-92 DrewB Created
//
//---------------------------------------------------------------
inline CSeekPointer::~CSeekPointer(void)
{
olAssert(_cReferences == 0);
}
//+--------------------------------------------------------------
//
// Member: CSeekPointer::GetPos, public
//
// Synopsis: Returns _ulPos
//
// History: 30-Apr-92 DrewB Created
//
//---------------------------------------------------------------
#ifdef LARGE_STREAMS
inline ULONGLONG CSeekPointer::GetPos(void) const
#else
inline ULONG CSeekPointer::GetPos(void) const
#endif
{
return _ulPos;
}
//+--------------------------------------------------------------
//
// Member: CSeekPointer::SetPos, public
//
// Synopsis: Assigns _ulPos
//
// History: 30-Apr-92 DrewB Created
//
//---------------------------------------------------------------
#ifdef LARGE_STREAMS
inline void CSeekPointer::SetPos(ULONGLONG ulPos)
#else
inline void CSeekPointer::SetPos(ULONG ulPos)
#endif
{
_ulPos = ulPos;
}
//+--------------------------------------------------------------
//
// Member: CSeekPointer::AddRef, public
//
// Synopsis: Increments _cReferences
//
// History: 30-Apr-92 DrewB Created
//
//---------------------------------------------------------------
inline void CSeekPointer::vAddRef(void)
{
InterlockedIncrement(&_cReferences);
}
#endif // #ifndef __SEEKPTR_HXX__