74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1995 - 2000.
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//
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// File: CIOPLOCK.HXX
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//
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// Contents: Oplock support for filtering documents
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//
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// Classes: CFilterOplock
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//
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// History: 03-Jul-95 DwightKr Created.
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//
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//----------------------------------------------------------------------------
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#pragma once
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//+---------------------------------------------------------------------------
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//
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// Class: CFilterOplock
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//
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// Purpose: Takes oplock on file object
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//
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// History: 03-Jul-95 DwightKr Created.
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//
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//----------------------------------------------------------------------------
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class CFilterOplock
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{
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public:
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CFilterOplock( CFunnyPath const & funnyFileName, BOOL fTakeOplock = TRUE );
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~CFilterOplock();
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BOOL IsOplockBroken() const;
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BOOL IsDirectory() const { return _fDirectory; }
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HANDLE GetFileHandle() { return _hFileNormal; }
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inline void CloseFileHandle();
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BOOL IsOffline() const { return (0 != (_BasicInfo.FileAttributes & FILE_ATTRIBUTE_OFFLINE) ); }
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void MaybeSetLastAccessTime( ULONG ulDelay );
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BOOL IsNotContentIndexed() const
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{
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return ( 0 != ( _BasicInfo.FileAttributes &
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FILE_ATTRIBUTE_NOT_CONTENT_INDEXED ) );
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}
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private:
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FILE_BASIC_INFORMATION _BasicInfo; // Used to store last-access time, etc.
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HANDLE _hFileOplock; // File handle for oplock
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HANDLE _hFileNormal; // File handle for NtQueryInfo, etc.
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HANDLE _hLockEvent; // Event signaled when lock broken
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IO_STATUS_BLOCK _IoStatus; // Asynchronous I/O status block
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BOOL _fDirectory; // no oplocks on directories
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BOOL _fWriteAccess; // FALSE if _hFileNormal has no
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// attribute write access
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CFunnyPath const & _funnyFileName; // Filename, for MaybeSetLastAccessTime
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};
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inline void CFilterOplock::CloseFileHandle ()
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{
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if ( INVALID_HANDLE_VALUE != _hFileNormal )
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{
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NtClose( _hFileNormal );
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_hFileNormal = INVALID_HANDLE_VALUE;
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}
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}
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