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