100 lines
2.7 KiB
C++
100 lines
2.7 KiB
C++
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//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1995.
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//
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// File: overlap.hxx
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//
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// Contents: COverlappedStream header
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//
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// Classes: COverlappedStream
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//
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// History: 19-Sep-95 HenryLee Created
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//
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// Notes: Requires NtIoApi.h
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//
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//----------------------------------------------------------------------------
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#ifndef __OVERLAP_HXX__
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#define __OVERLAP_HXX__
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#include <storext.h>
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//+---------------------------------------------------------------------------
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//
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// Class: COverlappedStream
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//
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// Purpose:Implements IOverlappedStream for OFS streams and flat files
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// (as opposed to overlapped I/O for IStream for docfiles)
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//
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// Notes: This is class with a partial implementation
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// To use this class, inherit this into another class that
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// implements IUnknown and IStream (and expose QueryInterface)
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//
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//----------------------------------------------------------------------------
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class COverlappedStream : public IOverlappedStream
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{
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public:
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inline COverlappedStream (HANDLE h = NULL);
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inline ~COverlappedStream ();
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// IOverlappedStream
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STDMETHOD(ReadOverlapped) (
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/* [in, size_is(cb)] */ void * pv,
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/* [in] */ ULONG cb,
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/* [out] */ ULONG * pcbRead,
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/* [in,out] */ STGOVERLAPPED *lpOverlapped);
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STDMETHOD(WriteOverlapped) (
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/* [in, size_is(cb)] */ void *pv,
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/* [in] */ ULONG cb,
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/* [out] */ ULONG * pcbWritten,
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/* [in,out] */ STGOVERLAPPED *lpOverlapped);
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STDMETHOD(GetOverlappedResult) (
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/* [in, out] */ STGOVERLAPPED *lpOverlapped,
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/* [out] */ DWORD * plcbTransfer,
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/* [in] */ BOOL fWait);
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protected:
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NuSafeNtHandle _h;
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private:
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};
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SAFE_INTERFACE_PTR(SafeCOverlappedStream, COverlappedStream);
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#define StgOverlapped_SIG LONGSIG('O', 'V', 'E', 'R')
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#define StgOverlapped_SIGDEL LONGSIG('O', 'v', 'E', 'r')
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//+-------------------------------------------------------------------
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//
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// Member: COverlappedStream::COverlappedStream
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//
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// Synopsis: Initialize the generic overlapped object.
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//
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// Arguments: none
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//
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//--------------------------------------------------------------------
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inline COverlappedStream::COverlappedStream(HANDLE h) : _h(h)
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{
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}
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//+-------------------------------------------------------------------
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//
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// Member: COverlappedStream::~COverlappedStream
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//
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// Synopsis: Destroys the generic overlapped object.
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//
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// Arguments: none
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//
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//--------------------------------------------------------------------
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inline COverlappedStream::~COverlappedStream()
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{
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}
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#endif // #ifndef __OVERLAP_HXX__
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