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80 lines
1.9 KiB
80 lines
1.9 KiB
//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1994.
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//
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// File: filelkb.hxx
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//
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// Contents: File ILockBytes class for async docfile
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//
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// Classes: CFileLockBytes
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//
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// Functions:
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//
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// History: 19-Dec-95 PhilipLa Created
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//
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//----------------------------------------------------------------------------
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#ifndef __FILELKB_HXX__
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#define __FILELKB_HXX__
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//+---------------------------------------------------------------------------
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//
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// Class: CFileLockBytes
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//
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// Purpose:
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//
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// Interface:
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//
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// History: 28-Dec-95 PhilipLa Created
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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class CFileLockBytes: public ILockBytes
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{
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public:
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CFileLockBytes();
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~CFileLockBytes();
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SCODE Init(OLECHAR const *pwcsName);
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// IUnknown
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STDMETHOD(QueryInterface)(REFIID iid, void **ppvObj);
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STDMETHOD_(ULONG, AddRef)(void);
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STDMETHOD_(ULONG, Release)(void);
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// ILockBytes
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STDMETHOD(ReadAt)(ULARGE_INTEGER ulOffset,
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VOID HUGEP *pv,
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ULONG cb,
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ULONG *pcbRead);
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STDMETHOD(WriteAt)(ULARGE_INTEGER ulOffset,
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VOID const HUGEP *pv,
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ULONG cb,
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ULONG *pcbWritten);
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STDMETHOD(Flush)(void);
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STDMETHOD(SetSize)(ULARGE_INTEGER cb);
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STDMETHOD(LockRegion)(ULARGE_INTEGER libOffset,
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ULARGE_INTEGER cb,
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DWORD dwLockType);
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STDMETHOD(UnlockRegion)(ULARGE_INTEGER libOffset,
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ULARGE_INTEGER cb,
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DWORD dwLockType);
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STDMETHOD(Stat)(STATSTG *pstatstg, DWORD grfStatFlag);
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private:
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LONG _cReferences;
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CRITICAL_SECTION _cs;
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HANDLE _h;
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OLECHAR _acName[MAX_PATH + 1];
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};
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SCODE Win32ErrorToScode(DWORD dwErr);
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#endif // #ifndef __FILELKB_HXX__
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